/* ================================================================
   DERSLIC LANDING PAGE — Design System & Styles
   Based on Figma design file
   ================================================================ */

/* ── Custom Brand Typeface: Derslic Sans ── */
@font-face {
  font-family: 'Derslic Sans';
  src: url('../fonts/fonts/DerslicSans-Regular.woff2') format('woff2');
  font-style: normal;
  font-weight: 400;
  font-display: swap;
}

@font-face {
  font-family: 'Derslic Sans';
  src: url('../fonts/fonts/DerslicSans-Medium.woff2') format('woff2');
  font-style: normal;
  font-weight: 500;
  font-display: swap;
}

@font-face {
  font-family: 'Derslic Sans';
  src: url('../fonts/fonts/DerslicSans-Bold.woff2') format('woff2');
  font-style: normal;
  font-weight: 700;
  font-display: swap;
}

/* ── Fallback Fonts ── */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── CSS Custom Properties (Design Tokens) ── */
/* ── CSS Custom Properties (Design Tokens & 3 Themes) ── */
:root,
[data-theme="light"] {
  /* Açık Tema (Canlı Atölye — Aydınlık & Ferah) */
  --paper: #FAF8F5;
  --paper-card: #FFFFFF;
  --paper-card-subtle: #F2EFE6;
  --ink: #172E3C;
  --ink-soft: #556770;
  --ink-muted: #82928D;
  --blue: #006ecb;
  --blue-hover: #0056a3;
  --blue-light: #E6F2FC;
  --lime: #E3EE91;
  --peach: #EDAB92;
  --line: #DCD8CE;
  --line-light: #EAE6DC;
  --navbar-bg: rgba(250, 248, 245, 0.94);
  --card-shadow: 0 4px 14px rgba(23, 46, 60, 0.05);
  --stage-bg: #E8E8DC;
  --stage-toolbar-color: #68796E;
  --conductor-sub: #637665;
  --piano-frame: #172E3C;
  --piano-key-white: #FFFDF7;
  --piano-key-black: #1B2E3A;
  --piano-key-border: #BDC2BA;
  --quote-bg: #FAFFDC;
  --quote-border: #AAB875;
  --ticket-bg: #FFFDF7;
  --ticket-border: #DDDED4;
  --ticket-shadow: 0 15px 35px rgba(20, 44, 57, 0.08);
  --badge-bg: #E6F2FC;
  --badge-color: #0077DF;
  --footer-bg: #101F29;
  --footer-text: #94A3B8;
  --footer-heading: #FFFFFF;
  --hero-disc-bg: #0077DF;
  --hero-disc-color: #FAF8F5;
  --hero-disc-shadow: 0 15px 35px rgba(0, 119, 223, 0.2);
  --sticker-bg: #E3EE91;
  --sticker-color: #172E3C;
  --theme-toggle-bg: #EDE9DF;
  --theme-toggle-border: #D0CCC0;
  --theme-toggle-btn-active: #FFFFFF;
  --theme-toggle-btn-text: #172E3C;
  --pricing-bg: #FFFFFF;
  --faq-bg: #F5F2EB;
  --banner-gradient: linear-gradient(135deg, #0077DF, #005EAF);

  /* Colors - Derslic Corporate Palette */
  --color-primary: var(--blue);
  --color-primary-dark: var(--blue-hover);
  --color-primary-light: var(--blue-light);
  --color-primary-50: #F2F8FE;
  --color-black: var(--ink);
  --color-gray-900: #1E293B;
  --color-gray-700: #334155;
  --color-gray-600: #475569;
  --color-gray-500: var(--ink-soft);
  --color-gray-400: #94A3B8;
  --color-gray-300: #CBD5E1;
  --color-gray-200: var(--line);
  --color-gray-100: var(--line-light);
  --color-gray-50: var(--paper-card-subtle);
  --color-white: #FFFFFF;
  --color-orange: #EA580C;
  --color-orange-light: #FFF7ED;
  --color-orange-warm: #C2410C;
  --color-red: #EF4444;
  --color-green: #22C55E;
  --color-green-light: #F0FDF4;

  /* Typography */
  --serif: Georgia, 'Times New Roman', serif;
  --sans: 'Derslic Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-derslic: 'Derslic Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Derslic Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-display: 'Derslic Sans', 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing */
  --section-padding: 90px 0;
  --container-width: 1240px;
  --container-padding: 0 24px;

  /* Borders */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(23, 46, 60, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(23, 46, 60, 0.07), 0 2px 4px -2px rgba(23, 46, 60, 0.05);
  --shadow-lg: 0 10px 15px -3px rgba(23, 46, 60, 0.08), 0 4px 6px -4px rgba(23, 46, 60, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(23, 46, 60, 0.1), 0 8px 10px -6px rgba(23, 46, 60, 0.05);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
  --transition-slow: 400ms ease;
}

[data-theme="dark"] {
  /* Koyu Tema (Gece Resitali — Modern & Net) */
  --paper: #0B131B;
  --paper-card: #13202E;
  --paper-card-subtle: #182738;
  --ink: #F1F5F9;
  --ink-soft: #CBD5E1;
  --ink-muted: #94A3B8;
  --blue: #38BDF8;
  --blue-hover: #0284C7;
  --blue-light: rgba(56, 189, 248, 0.14);
  --lime: #A3E635;
  --peach: #FB923C;
  --line: #223446;
  --line-light: #1A2837;
  --navbar-bg: rgba(11, 19, 27, 0.94);
  --card-shadow: 0 8px 24px rgba(0, 0, 0, 0.45);
  --stage-bg: #101A24;
  --stage-toolbar-color: #CBD5E1;
  --conductor-sub: #CBD5E1;
  --piano-frame: #080E14;
  --piano-key-white: #E2E8F0;
  --piano-key-black: #0F172A;
  --piano-key-border: #334155;
  --quote-bg: rgba(163, 230, 53, 0.1);
  --quote-border: #A3E635;
  --ticket-bg: #13202E;
  --ticket-border: #223446;
  --ticket-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
  --badge-bg: rgba(56, 189, 248, 0.14);
  --badge-color: #38BDF8;
  --footer-bg: #070C12;
  --footer-text: #64748B;
  --footer-heading: #F1F5F9;
  --hero-disc-bg: #0284C7;
  --hero-disc-color: #FFFFFF;
  --hero-disc-shadow: 0 15px 35px rgba(56, 189, 248, 0.25);
  --sticker-bg: #A3E635;
  --sticker-color: #0B131B;
  --theme-toggle-bg: #182738;
  --theme-toggle-border: #223446;
  --theme-toggle-btn-active: #0B131B;
  --theme-toggle-btn-text: #F1F5F9;
  --pricing-bg: #0E1721;
  --faq-bg: #0B131B;
  --banner-gradient: linear-gradient(135deg, #0284C7, #0369A1);
}

[data-theme="art"] {
  /* Sanat Teması (Sıcak Kahve, Kış Ortamı, Loş Işık & Klasik Müzik) */
  --paper: #181310;              /* Derin sıcak espresso gölgesi, loş kış akşamı */
  --paper-card: #231B17;         /* Koyu ceviz ahşabı ve sıcak moka kart zemini */
  --paper-card-subtle: #2C211C;  /* Sıcak kakao / kavrulmuş fındık alt tonu */
  --ink: #F6EDE3;                /* Kremamsı süt köpüğü / sıcak parşömen metin */
  --ink-soft: #D5C2B2;           /* Açık kaşmir / okunabilir bej açıklamalar */
  --ink-muted: #B5A292;          /* Muted tarçın tozu dipnotlar */
  --blue: #E2965D;               /* Sıcak kehribar fener & keman verniği ışıltısı */
  --blue-hover: #CC8045;
  --blue-light: rgba(226, 150, 93, 0.16);
  --lime: #D9BE7D;               /* Antik pirinç & loş sarı abajur ışığı */
  --peach: #D88970;              /* Sıcak pastel kış terakota tonu */
  --line: #3D2D25;               /* Koyu espresso ahşap kenar çizgisi */
  --line-light: #2C201A;
  --navbar-bg: rgba(24, 19, 16, 0.94);
  --card-shadow: 0 8px 26px rgba(10, 6, 4, 0.5);
  --stage-bg: #201713;           /* Mum ışığı ve klasik müzik tınısı akustik sahne */
  --stage-toolbar-color: #D5C2B2;
  --conductor-sub: #D5C2B2;
  --piano-frame: #130E0C;        /* Koyu cilalı abanoz & maun piyano kasası */
  --piano-key-white: #EDE0D0;    /* Vintage sıcak fildişi tuşlar */
  --piano-key-black: #1E1612;    /* Sıcak espresso siyah tuşlar */
  --piano-key-border: #524036;
  --quote-bg: rgba(217, 190, 125, 0.12);
  --quote-border: #D9BE7D;
  --ticket-bg: #231B17;          /* Nostaljik kış konseri parşömen bileti */
  --ticket-border: #3D2D25;
  --ticket-shadow: 0 15px 40px rgba(12, 7, 4, 0.6);
  --badge-bg: rgba(226, 150, 93, 0.15);
  --badge-color: #E2965D;
  --footer-bg: #100C0A;          /* Derin sıcak kahve telvesi footer */
  --footer-text: #968476;
  --footer-heading: #F6EDE3;
  --hero-disc-bg: #B56637;       /* Sıcak terakota & amber vinil plak dokusu */
  --hero-disc-color: #FAF4ED;
  --hero-disc-shadow: 0 15px 45px rgba(226, 150, 93, 0.28);
  --sticker-bg: #D9BE7D;         /* Vintage pirinç mühür */
  --sticker-color: #181310;
  --theme-toggle-bg: #231B17;
  --theme-toggle-border: #3D2D25;
  --theme-toggle-btn-active: #181310;
  --theme-toggle-btn-text: #F6EDE3;
  --pricing-bg: #1D1613;
  --faq-bg: #181310;
  --banner-gradient: linear-gradient(135deg, #B56637, #7E3E1C);
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 80px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--ink);
  background-color: var(--paper);
  overflow-x: hidden;
}

::selection {
  background: var(--lime);
  color: var(--ink);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  text-decoration: none;
  color: inherit;
  transition: color var(--transition-fast);
}

ul, ol {
  list-style: none;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* ── Container ── */
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: var(--container-padding);
}

/* ── Utility Classes ── */
.section-badge {
  display: inline-block;
  padding: 6px 16px;
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-transform: uppercase;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2rem, 4vw, 3rem);
  color: var(--color-black);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 16px;
}

.section-title--italic {
  font-style: normal;
}

.section-subtitle {
  font-size: 17px;
  color: var(--color-gray-500);
  max-width: 600px;
  line-height: 1.7;
}

.text-center {
  text-align: center;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 119, 223, 0.35);
}

.btn--outline {
  background: transparent;
  color: var(--color-white);
  border: 2px solid rgba(255, 255, 255, 0.5);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: var(--color-white);
}

.btn--outline-dark {
  background: transparent;
  color: var(--color-black);
  border: 2px solid var(--color-gray-200);
}

.btn--outline-dark:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn--white {
  background: var(--color-white);
  color: var(--color-primary);
}

.btn--white:hover {
  background: var(--color-gray-50);
  transform: translateY(-1px);
  box-shadow: var(--shadow-lg);
}

.btn-arrow {
  transition: transform var(--transition-fast);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ================================================================
   1. NAVIGATION
   ================================================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--navbar-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  transition: all var(--transition-base);
  height: 73px;
}

.navbar .container {
  max-width: 1440px;
  padding: 0 32px;
}

.navbar.scrolled {
  box-shadow: 0 4px 20px rgba(23, 46, 60, 0.08);
}

.navbar__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  height: 73px;
}

.navbar__brand {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  min-width: 0;
  margin-right: 32px;
}

.navbar__brand .navbar__logo {
  margin-right: 0;
}

.navbar__logo {
  display: flex;
  align-items: center;
  flex-shrink: 0;
  margin-right: 32px;
}

/* ── 5. Yıl Rozeti (Badge) ── */
.derslic-year-badge {
  --badge-size: 46px;
  display: inline-grid;
  place-items: center;
  position: relative;
  isolation: isolate;
  width: var(--badge-size);
  height: var(--badge-size);
  flex: 0 0 var(--badge-size);
  border-radius: 50%;
  color: #fff8ee;
  box-shadow: 0 2px 5px rgba(70, 18, 28, 0.22), 0 5px 12px rgba(70, 18, 28, 0.16);
  user-select: none;
  cursor: default;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s ease;
}

.derslic-year-badge:hover {
  transform: translateY(-1px) scale(1.04);
  box-shadow: 0 4px 10px rgba(70, 18, 28, 0.28), 0 8px 18px rgba(70, 18, 28, 0.22);
}

.derslic-year-badge--desktop {
  display: inline-grid;
  margin-left: 2px;
}

.derslic-year-badge--mobile {
  display: none;
}

.derslic-year-badge__art {
  display: block;
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  overflow: visible;
  pointer-events: none;
}

.navbar__logo img {
  height: 38px;
  width: auto;
  object-fit: contain;
  transition: transform var(--transition-fast);
}

.navbar__logo:hover img {
  transform: scale(1.02);
}

.navbar__logo-text {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: -0.5px;
}

.navbar__links {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-shrink: 0;
}

.navbar__link {
  font-size: 14px;
  font-weight: 500;
  color: var(--ink);
  white-space: nowrap;
  transition: color var(--transition-fast);
  position: relative;
}

.navbar__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--blue);
  transition: width var(--transition-base);
}

.navbar__link:hover {
  color: var(--blue);
}

.navbar__link:hover::after {
  width: 100%;
}

.navbar__actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* ── Theme Switcher ── */
.theme-switch {
  display: inline-flex;
  align-items: center;
  background: var(--theme-toggle-bg);
  border: 1px solid var(--theme-toggle-border);
  border-radius: var(--radius-full);
  padding: 3px;
  gap: 2px;
  transition: all var(--transition-base);
  box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.05);
}

.theme-switch__btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 5px 10px;
  border-radius: var(--radius-full);
  font-size: 11.5px;
  font-weight: 600;
  color: var(--ink-soft);
  background: transparent;
  border: none;
  cursor: pointer;
  white-space: nowrap;
  transition: all 0.18s ease;
  line-height: 1;
}

.theme-switch__btn:hover {
  color: var(--ink);
}

.theme-switch__btn.active {
  background: var(--theme-toggle-btn-active);
  color: var(--theme-toggle-btn-text);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.14);
}

.theme-switch__icon {
  font-size: 12px;
  line-height: 1;
}

.mobile-theme-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 0 14px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 8px;
}

.mobile-theme-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.theme-switch--mobile {
  padding: 4px;
}

.theme-switch--mobile .theme-switch__btn {
  padding: 6px 12px;
  font-size: 12px;
}



/* Global Motion Off */
body.motion-off *,
body.motion-off *::before,
body.motion-off *::after {
  animation: none !important;
  transition: none !important;
  scroll-behavior: auto !important;
}

body.motion-off .keyboard button:active,
body.motion-off .ink-button:hover span,
body.motion-off .run-scene:active {
  transform: none !important;
}

.navbar__login {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.navbar__login:hover {
  color: var(--blue);
}

.navbar__cta {
  padding: 9px 18px;
  font-size: 13.5px;
}

/* Hamburger */
.navbar__hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.navbar__hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-gray-700);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.navbar__hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.navbar__hamburger.active span:nth-child(2) {
  opacity: 0;
}

.navbar__hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile menu */
.navbar__mobile {
  display: none;
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  bottom: 0;
  width: 100%;
  height: calc(100vh - 73px);
  height: calc(100dvh - 73px);
  background: var(--paper);
  color: var(--ink);
  padding: 20px 24px 60px;
  flex-direction: column;
  gap: 8px;
  z-index: 999;
  opacity: 0;
  transform: translateY(-8px);
  transition: opacity var(--transition-base), transform var(--transition-base);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
  border-top: 1px solid var(--line);
}

.navbar__mobile.open {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.navbar__mobile a {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  border-radius: var(--radius-md);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.navbar__mobile a:hover {
  background: var(--paper-card);
  color: var(--blue);
}

.navbar__mobile .btn {
  margin-top: 16px;
  justify-content: center;
}

@media (min-width: 1241px) {
  .navbar__mobile {
    display: none !important;
  }
}

/* ================================================================
   2. HERO SECTION — Canlı Atölye
   ================================================================ */
.hero--atelier {
  position: relative;
  margin-top: 73px;
  padding: 56px 0 55px;
  background: var(--paper);
  min-height: auto;
  overflow: clip;
}

.hero__atelier-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.08fr);
  gap: 36px;
  align-items: center;
  min-height: auto;
  position: relative;
}

.hero-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
  padding: 20px 0;
}

.kicker {
  font: 11px/1.5 var(--font-body);
  letter-spacing: 0.14em;
  font-weight: 700;
  color: var(--ink);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.tiny-star {
  color: var(--blue);
  font-size: 21px;
  line-height: 1;
}

#heroTitle {
  font-size: clamp(48px, 5.2vw, 84px);
  line-height: 0.98;
  letter-spacing: -0.035em;
  font-weight: 700;
  color: var(--ink);
  margin: 0 0 25px;
}

#heroTitle .outlined {
  color: var(--blue);
}

#heroTitle .period {
  color: var(--blue);
}

.hero-description {
  font-size: 17px;
  line-height: 1.65;
  max-width: 440px;
  color: var(--ink-soft);
  margin-bottom: 30px;
}

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  align-items: center;
  margin-bottom: 8px;
}

.ink-button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px 24px;
  background: var(--ink);
  color: var(--paper);
  font-size: 14px;
  font-weight: 600;
  border-radius: var(--radius-md);
  min-height: 54px;
  transition: background 0.2s, transform 0.2s;
}

.ink-button span {
  font: 24px/1 system-ui;
  transition: transform 0.2s;
}

.ink-button:hover {
  background: #0d1e28;
  transform: translateY(-1px);
}

.ink-button:hover span {
  transform: translate(3px, 3px);
}

.navbar__cta-hero {
  min-height: 54px;
  padding: 16px 24px;
  font-size: 14px;
}

.micro-note {
  display: block;
  font-family: var(--serif);
  font-size: 15px;
  font-style: italic;
  margin-top: 14px;
  color: #66736e;
}

.hero__features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 40px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.hero__feature {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}

.hero__feature-icon {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: #fffdf7;
  border: 1px solid #dcdfd5;
  box-shadow: 2px 3px 0 rgba(23, 46, 60, 0.06);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: transform var(--transition-fast);
}

.hero__feature:hover .hero__feature-icon {
  transform: translateY(-2px);
}

/* Hero Right: Interactive Individual Course Schedule (Bireysel Ders Programı v2) */
derslic-course-day {
  display: block;
  min-width: 0;
  width: 100%;
  max-width: 540px;
  margin: 0 auto;
  font-family: var(--font-derslic, 'Derslic Sans', sans-serif);
  position: relative;
  z-index: 2;
}

/* ================================================================
   DISCIPLINE STRIP
   ================================================================ */
.discipline-strip {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  padding: 24px 5%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  font: italic 28px var(--serif);
  color: var(--ink);
  background: var(--paper);
  overflow-x: auto;
  white-space: nowrap;
}

.discipline-strip i {
  font: 23px system-ui;
  color: var(--blue);
  font-style: normal;
}

/* ================================================================
   3. PAIN POINTS SECTION
   ================================================================ */
.pain-points {
  padding: var(--section-padding);
  background: var(--paper);
}

.pain-points__header {
  text-align: center;
  margin-bottom: 60px;
}

.pain-points__header .section-subtitle {
  margin: 0 auto;
}

.pain-points__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: start;
}

.pain-points__image {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 3/4;
}

.pain-points__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.pain-points__image-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
  color: var(--color-white);
  font-size: 15px;
  font-weight: 600;
}

.pain-points__cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.pain-card {
  padding: 24px;
  border-radius: var(--radius-md);
  background: var(--paper-card);
  transition: all var(--transition-base);
  border: 1px solid var(--line);
  box-shadow: 2px 3px 0 rgba(23, 46, 60, 0.05);
}

.pain-card:hover {
  background: var(--paper-card);
  border-color: var(--blue);
  box-shadow: var(--card-shadow);
  transform: translateY(-2px);
}

.pain-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  transition: transform var(--transition-fast);
}

.pain-card:hover .pain-card__icon {
  transform: scale(1.06);
}

.pain-card__title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}

.pain-card__desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ================================================================
   4. SOLUTION BANNER
   ================================================================ */
.solution-banner {
  background: var(--blue);
  padding: 48px 24px;
  text-align: center;
  margin: 0 auto;
  max-width: var(--container-width);
  border-radius: var(--radius-lg);
  margin-bottom: -40px;
  position: relative;
  z-index: 2;
  box-shadow: 0 10px 30px rgba(0, 119, 223, 0.25);
}

.solution-banner__text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.3rem, 3vw, 1.7rem);
  color: var(--color-white);
  line-height: 1.4;
  max-width: 700px;
  margin: 0 auto;
}

/* ================================================================
   5. COMPARISON SECTION
   ================================================================ */
.comparison {
  padding: 60px 0 var(--section-padding);
  background: var(--paper);
}

derslic-flow-bridge {
  display: block;
  font-family: var(--font-derslic, 'Derslic Sans', sans-serif);
  margin-bottom: 60px;
}

.comparison__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.comparison__card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper-card);
  border: 1px solid var(--line);
  box-shadow: 3px 4px 0 rgba(23, 46, 60, 0.05);
}

.comparison__card-header {
  padding: 24px;
  position: relative;
  min-height: 140px;
  display: flex;
  align-items: flex-end;
}

.comparison__card-header img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comparison__card-header::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 30%, rgba(0, 0, 0, 0.7));
}

.comparison__card-header h3 {
  position: relative;
  z-index: 1;
  color: var(--color-white);
  font-size: 18px;
  font-weight: 700;
}

.comparison__card-body {
  padding: 24px;
}

.comparison__item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  font-size: 14px;
  color: var(--color-gray-700);
  border-bottom: 1px solid var(--color-gray-100);
}

.comparison__item:last-child {
  border-bottom: none;
}

.comparison__icon--bad {
  color: var(--color-red);
  font-size: 16px;
  flex-shrink: 0;
}

.comparison__icon--good {
  color: var(--color-green);
  font-size: 16px;
  flex-shrink: 0;
}

.comparison__note {
  text-align: center;
  margin-top: 32px;
  font-size: 14px;
  color: var(--color-gray-500);
  line-height: 1.7;
}

/* ================================================================
   CANLI SAHNE / LIVE STAGE CHOREOGRAPHY
   ================================================================ */
.live-section {
  padding: 60px 0 30px;
  scroll-margin-top: 80px;
}

.scene-intro > .kicker {
  color: #5d726d;
  font: 11px/1.5 var(--font-body);
  letter-spacing: 0.14em;
  font-weight: 700;
  display: block;
}

.scene-intro > div {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
  margin: 18px 0 32px;
}

.scene-intro h2 {
  font-size: clamp(32px, 3.8vw, 50px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.025em;
  color: var(--ink);
  margin: 0;
}

.scene-intro h2 em {
  font-family: var(--serif);
  font-weight: 400;
  font-style: italic;
}

.scene-intro p {
  font-size: 15px;
  line-height: 1.65;
  color: #62726b;
  margin: 0;
  max-width: 360px;
}

.live-stage {
  height: 620px;
  position: relative;
  background: var(--stage-bg, #e8e8dc);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 16px 40px rgba(23, 46, 60, 0.06);
}

.stage-toolbar {
  display: flex;
  justify-content: space-between;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  padding: 18px 24px;
  font: 9px var(--font-body);
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--stage-toolbar-color, #68796e);
  z-index: 2;
}

.stage-toolbar > span:first-child {
  display: flex;
  align-items: center;
  gap: 8px;
}

.connections {
  position: absolute;
  inset: 45px 0 0;
  width: 100%;
  height: calc(100% - 45px);
  pointer-events: none;
}

.active-route {
  opacity: 0;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
}

.scene-paper {
  width: 29%;
  position: absolute;
  padding: 22px 24px 20px;
  background: #FFFDF7 !important;
  border: 1px solid #D6D8CE !important;
  border-radius: 4px;
  box-shadow: 3px 5px 0 rgba(23, 46, 60, 0.06);
  z-index: 1;
  min-height: 172px;
  transition: background-color 0.3s, border-color 0.3s;
}

.scene-paper.schedule {
  left: 4%;
  top: 80px;
  transform: rotate(-4deg);
}

.scene-paper.package {
  right: 4%;
  top: 80px;
  transform: rotate(4deg);
}

.scene-paper.earnings {
  left: 4%;
  bottom: 40px;
  transform: rotate(3deg);
}

.scene-paper.notification {
  right: 4%;
  bottom: 40px;
  transform: rotate(-3deg);
}

.paper-number {
  position: absolute;
  right: 15px;
  top: 12px;
  font: 10px var(--font-body);
  font-weight: 700;
  color: #4a5b4e !important;
}

.paper-heading {
  display: flex;
  gap: 10px;
  align-items: center;
}

.paper-heading svg {
  width: 26px;
  height: 26px;
  stroke: var(--blue);
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
  flex: none;
}

.paper-heading h3 {
  font-size: 16px;
  font-weight: 700;
  line-height: 1.35;
  color: #172E3C !important;
  margin: 0;
}

.paper-value {
  font-size: 26px;
  line-height: 1.2;
  margin: 16px 0 8px;
  white-space: nowrap;
  letter-spacing: -0.025em;
  color: #172E3C !important;
}

.paper-value strong {
  font-weight: 700;
}

.paper-value span {
  font-size: 18px;
}

.notification-value {
  font-size: 19px;
}

.paper-caption {
  font-size: 11px;
  color: #45584e !important;
  display: block;
}

.paper-mark {
  position: absolute;
  right: 15px;
  bottom: 15px;
  color: #1e7047 !important;
  font: italic 21px var(--serif);
  opacity: 0;
  transform: rotate(-12deg);
  transition: opacity 0.3s;
}

.scene-paper.done {
  background: #FAFFDC !important;
  border-color: #AAB875 !important;
}

.scene-paper.done h3,
.scene-paper.done .paper-value {
  color: #172E3C !important;
}

.scene-paper.done .paper-caption {
  color: #355d37 !important;
}

.scene-paper.done .paper-mark {
  opacity: 1;
}

.conductor {
  position: absolute;
  left: 50%;
  top: 52%;
  transform: translate(-50%, -50%);
  width: 240px;
  height: 240px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  z-index: 3;
}

.conductor-orbit {
  position: absolute;
  inset: 0;
  border: 1px dashed #9fae9d;
  border-radius: 50%;
  font: 37px system-ui;
  color: #9fae9d;
  display: flex;
  justify-content: center;
  align-items: start;
  line-height: 0.7;
  pointer-events: none;
}

.conductor-label {
  font: 8px var(--font-body);
  font-weight: 700;
  letter-spacing: 0.09em;
  color: #4a655b;
  position: relative;
}

.run-scene {
  border: 0;
  border-radius: 50%;
  width: 140px;
  height: 140px;
  background: var(--blue);
  color: #fffdf7;
  margin: 12px 0 8px;
  box-shadow: 0 6px 0 #00569c;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 4px;
  font-size: 17px;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s;
}

.run-scene:hover {
  background: #006ac5;
}

.run-scene:active {
  transform: translateY(3px);
  box-shadow: 0 3px 0 #00569c;
}

.run-scene:disabled {
  background: var(--ink);
  box-shadow: 0 5px 0 #081d29;
  cursor: default;
}

.run-symbol {
  font: 40px/1 system-ui;
}

.conductor-sub {
  font: italic 14px var(--serif);
  color: #637665;
}

.stage-footer {
  display: flex;
  gap: 20px;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
  min-height: 75px;
}

.stage-footer p {
  font-size: 13px;
  color: #68766c;
  max-width: 800px;
  margin: 0;
  line-height: 1.7;
}

.stage-footer button {
  border: 0;
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  color: var(--blue);
  white-space: nowrap;
  padding: 10px 0;
  cursor: pointer;
  transition: color var(--transition-fast);
}

.stage-footer button:hover {
  color: var(--color-primary-dark);
}

.stage-footer button span {
  margin-left: 8px;
  font-size: 20px;
}

/* ================================================================
   6. THREE STEPS SECTION
   ================================================================ */
.steps {
  padding: var(--section-padding);
  background: var(--paper-card-subtle);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.steps__header {
  text-align: center;
  margin-bottom: 48px;
}

.steps__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 40px;
}

.step-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--paper-card);
  border: 1px solid var(--line);
  box-shadow: 2px 4px 0 rgba(23, 46, 60, 0.05);
  transition: all var(--transition-base);
}

.step-card:hover {
  transform: translateY(-4px);
  border-color: var(--blue);
  box-shadow: 4px 8px 0 rgba(23, 46, 60, 0.08);
}

.step-card__image {
  position: relative;
  aspect-ratio: 4/3;
  overflow: hidden;
}

.step-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.step-card:hover .step-card__image img {
  transform: scale(1.05);
}

.step-card__number {
  position: absolute;
  top: 16px;
  left: 16px;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background: var(--blue);
  color: var(--color-white);
  font-size: 16px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.step-card__body {
  padding: 24px;
}

.step-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 8px;
}

.step-card__desc {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.steps__cta {
  text-align: center;
}

/* ================================================================
   7. FEATURE TABS SECTION
   ================================================================ */
.features {
  padding: var(--section-padding);
  background: var(--paper);
}

.features__tabs {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-bottom: 48px;
}

.features__tab {
  padding: 10px 24px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--line);
  transition: all var(--transition-base);
  cursor: pointer;
}

.features__tab.active {
  background: var(--ink);
  color: var(--paper);
  border-color: var(--ink);
}

.features__tab:not(.active):hover {
  color: var(--blue);
  border-color: var(--blue);
}

.features__content {
  display: none;
}

.features__content.active {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.features__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 4px 6px 0 rgba(23, 46, 60, 0.08);
  border: 1px solid var(--line);
}

.features__image img {
  width: 100%;
  height: auto;
}

.features__info .section-badge {
  margin-bottom: 12px;
}

.features__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}

.features__desc {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 24px;
}

.features__list {
  margin-bottom: 24px;
}

.features__list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink);
}

.features__list-icon {
  color: var(--color-green);
  font-size: 16px;
  flex-shrink: 0;
}

.features__quote {
  padding: 16px 20px;
  background: var(--quote-bg);
  border-left: 3px solid var(--quote-border);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.6;
  margin-top: 24px;
}

/* ================================================================
   8. REMINDERS SECTION
   ================================================================ */
.reminders {
  padding: var(--section-padding);
  background: var(--paper-card-subtle);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.reminders__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.reminders__info .section-badge {
  background: rgba(234, 88, 12, 0.12);
  color: var(--color-orange);
  border: 1px solid rgba(234, 88, 12, 0.2);
}

[data-theme="dark"] .reminders__info .section-badge {
  background: rgba(251, 146, 60, 0.15);
  color: #FB923C;
  border-color: rgba(251, 146, 60, 0.3);
}

[data-theme="art"] .reminders__info .section-badge {
  background: rgba(226, 150, 93, 0.15);
  color: #E2965D;
  border-color: rgba(226, 150, 93, 0.3);
}

.reminders__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}

.reminders__desc {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 24px;
}

.reminders__channels {
  display: flex;
  gap: 12px;
  margin-bottom: 24px;
}

.reminders__channel {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.reminders__mockup {
  position: relative;
}

.reminders__mockup-card {
  background: var(--paper-card);
  border-radius: var(--radius-lg);
  padding: 20px;
  box-shadow: var(--card-shadow);
  max-width: 380px;
  margin: 0 auto;
  border: 1px solid var(--line);
  transition: transform var(--transition-base);
}

.reminders__mockup-card:hover {
  transform: translateY(-2px);
}

.reminders__mockup-card + .reminders__mockup-card {
  margin-top: -20px;
  margin-left: 40px;
  position: relative;
}

.mockup-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.mockup-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 700;
  font-size: 14px;
}

[data-theme="dark"] .mockup-avatar {
  background: var(--blue);
  color: #0B131B;
}

[data-theme="art"] .mockup-avatar {
  background: var(--blue);
  color: #181310;
}

.mockup-avatar--alt {
  background: var(--peach, #EA580C);
  color: #FFFFFF;
}

[data-theme="dark"] .mockup-avatar--alt {
  background: #FB923C;
  color: #0B131B;
}

[data-theme="art"] .mockup-avatar--alt {
  background: #D88970;
  color: #181310;
}

.mockup-sender {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.mockup-time {
  font-size: 12px;
  color: var(--ink-muted);
}

.mockup-body {
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px;
  font-size: 14px;
  color: var(--ink);
  line-height: 1.6;
}

/* ================================================================
   9. COURSE TYPES SECTION
   ================================================================ */
.course-types {
  padding: var(--section-padding);
  background: var(--paper);
}

.course-types__header {
  text-align: center;
  margin-bottom: 48px;
}

.course-types__header .section-subtitle {
  margin: 0 auto;
}

.course-types__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.course-type-card {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  border: 1px solid var(--line);
}

.course-type-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.course-type-card:hover img {
  transform: scale(1.08);
}

.course-type-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(transparent 50%, rgba(0, 0, 0, 0.7));
  transition: opacity var(--transition-base);
}

.course-type-card__label {
  position: absolute;
  bottom: 16px;
  left: 16px;
  z-index: 1;
  color: #FFFFFF;
  font-size: 15px;
  font-weight: 600;
  text-shadow: 0 1px 3px rgba(0, 0, 0, 0.6);
}

/* ================================================================
   10. STUDENT MANAGEMENT / SECONDARY FEATURE
   ================================================================ */
.student-mgmt {
  padding: var(--section-padding);
  background: var(--paper-card-subtle);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.student-mgmt__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.student-mgmt__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.3;
  margin-bottom: 16px;
}

.student-mgmt__desc {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.7;
  margin-bottom: 24px;
}

.student-mgmt__list-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 0;
  font-size: 14px;
  color: var(--ink);
}

.student-mgmt__image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--line);
}

.student-mgmt__image img {
  width: 100%;
  height: auto;
}

/* ================================================================
   11. DASHBOARD SECTION — Interactive Product Showcase
   ================================================================ */
.dashboard {
  padding: var(--section-padding);
  background: var(--paper);
}

.dashboard__header {
  text-align: center;
  margin-bottom: 40px;
}

.dashboard__header .section-badge {
  margin-bottom: 12px;
}

.dashboard__image {
  border-radius: var(--radius-xl);
  overflow: visible;
  border: none;
  box-shadow: none;
  background: transparent;
}

.dashboard__notes {
  display: flex;
  gap: 24px;
  justify-content: space-between;
  padding: 24px 8px 0;
  font-size: 12px;
  color: var(--ink-soft);
}

.dashboard__notes b {
  font-weight: 700;
  color: var(--ink);
}

.dashboard__notes span {
  max-width: 340px;
  line-height: 1.6;
}

@media (max-width: 768px) {
  .dashboard__notes {
    flex-direction: column;
    gap: 12px;
  }
  .dashboard__notes span {
    max-width: none;
  }
}

/* ================================================================
   12. METRICS SECTION
   ================================================================ */
.metrics {
  padding: var(--section-padding);
  background: var(--paper-card-subtle);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.metrics__header {
  text-align: center;
  margin-bottom: 48px;
}

.metrics__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.metric-card {
  padding: 28px;
  border-radius: var(--radius-lg);
  background: var(--paper-card);
  border: 1px solid var(--line);
  box-shadow: var(--card-shadow);
  transition: all var(--transition-base);
}

.metric-card:hover {
  border-color: var(--blue);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.metric-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--blue-light);
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.metric-card__value {
  font-size: clamp(20px, 2.2vw, 28px);
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 4px;
}

.metric-card__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.metric-card__desc {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ================================================================
   12B. NETWORK & CITIES MAP SECTION
   ================================================================ */
.network-section {
  padding: var(--section-padding);
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

derslic-city-map {
  display: block;
  width: 100%;
}

/* ================================================================
   13. TESTIMONIALS SECTION
   ================================================================ */
.testimonials {
  padding: var(--section-padding);
  background: var(--paper);
}

.testimonials__header {
  text-align: center;
  margin-bottom: 48px;
}

.testimonials__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 20px;
}

.testimonial-card {
  background: var(--paper-card);
  border-radius: var(--radius-lg);
  padding: 28px;
  box-shadow: var(--card-shadow);
  border: 1px solid var(--line);
  transition: all var(--transition-base);
}

.testimonial-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
  border-color: var(--blue);
}

.testimonial-card__quote-icon {
  font-size: 32px;
  color: var(--blue);
  margin-bottom: 12px;
  line-height: 1;
}

.testimonial-card__text {
  font-size: 14px;
  color: var(--ink);
  line-height: 1.7;
  margin-bottom: 20px;
  font-style: italic;
}

.testimonial-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.testimonial-card__avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, #F472B6, #EC4899);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  font-weight: 700;
  font-size: 16px;
}

.testimonial-card__name {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.testimonial-card__role {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ================================================================
   14. CTA BANNER
   ================================================================ */
.cta-banner {
  padding: 60px 24px;
  background: var(--banner-gradient, linear-gradient(135deg, #EA580C, #C2410C));
  border-radius: var(--radius-xl);
  max-width: var(--container-width);
  margin: 0 auto;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
}

.cta-banner__title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--color-white);
  line-height: 1.3;
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  position: relative;
}

.cta-banner .btn {
  position: relative;
}

/* ================================================================
   15. PRICING SECTION
   ================================================================ */
.pricing {
  padding: var(--section-padding);
  background: var(--pricing-bg);
}

derslic-pricing {
  display: block;
  font-family: var(--font-derslic, 'Derslic Sans', sans-serif);
}

/* ================================================================
   16. FAQ SECTION
   ================================================================ */
.faq {
  padding: var(--section-padding);
  background: var(--faq-bg);
}

derslic-faq {
  display: block;
  max-width: 1180px;
  margin: 0 auto;
  font-family: var(--font-derslic, 'Derslic Sans', sans-serif);
}

/* ================================================================
   17. FINAL CTA
   ================================================================ */
.final-cta {
  padding: 80px 0;
  background: var(--paper);
  text-align: center;
}

.final-cta__title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  color: var(--ink);
  line-height: 1.2;
  margin-bottom: 24px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

.final-cta__subtitle {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 32px;
  max-width: 500px;
  margin-left: auto;
  margin-right: auto;
}

/* ================================================================
   18. FOOTER
   ================================================================ */
.footer {
  padding: 60px 0 32px;
  background: var(--footer-bg);
  color: var(--footer-text);
  border-top: 1px solid var(--line);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer__logo {
  display: inline-block;
  margin-bottom: 16px;
  transition: opacity var(--transition-fast);
}

.footer__logo:hover {
  opacity: 0.9;
}

.footer__logo img {
  height: 36px;
  width: auto;
  object-fit: contain;
}

.footer__brand p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--footer-text);
}

.footer__heading {
  font-size: 14px;
  font-weight: 600;
  color: var(--footer-heading);
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.footer__links a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--footer-text);
  transition: color var(--transition-fast);
}

.footer__links a:hover {
  color: var(--blue);
}

.footer__bottom {
  padding-top: 24px;
  border-top: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.footer__bottom-links {
  display: flex;
  gap: 24px;
}

.footer__bottom-links a {
  color: var(--footer-text);
  transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
  color: var(--color-primary);
}

derslic-brand-footer {
  display: block;
  width: 100%;
}

.footer__legal-bar {
  display: flex;
  justify-content: flex-end;
  padding-top: 14px;
}

/* ================================================================
   ANIMATIONS
   ================================================================ */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

.animate-on-scroll.delay-1 { transition-delay: 100ms; }
.animate-on-scroll.delay-2 { transition-delay: 200ms; }
.animate-on-scroll.delay-3 { transition-delay: 300ms; }
.animate-on-scroll.delay-4 { transition-delay: 400ms; }
.animate-on-scroll.delay-5 { transition-delay: 500ms; }

/* ================================================================
   RESPONSIVE DESIGN
   ================================================================ */
@media (max-width: 1440px) {
  .navbar .container {
    padding: 0 20px;
  }

  .navbar__inner {
    gap: 14px;
  }

  .navbar__brand {
    margin-right: 16px;
  }

  .navbar__logo {
    margin-right: 0;
  }

  .navbar__links {
    gap: 14px;
  }

  .navbar__link {
    font-size: 13.5px;
  }

  .navbar__actions {
    gap: 10px;
  }

  .navbar__cta {
    padding: 8px 14px;
    font-size: 12.5px;
  }

  .theme-switch__btn {
    padding: 4px 8px;
    font-size: 11px;
  }

  .derslic-year-badge--desktop {
    --badge-size: 42px;
    margin-left: 2px;
  }
}

@media (max-width: 1366px) {
  .navbar .container {
    padding: 0 16px;
  }

  .navbar__inner {
    gap: 10px;
  }

  .navbar__brand {
    margin-right: 10px;
  }

  .navbar__links {
    gap: 10px;
  }

  .navbar__link {
    font-size: 12.5px;
  }

  .navbar__actions {
    gap: 8px;
  }

  .navbar__login {
    font-size: 13px;
  }

  .navbar__cta {
    padding: 8px 12px;
    font-size: 12px;
  }

  .theme-switch__btn {
    padding: 4px 6px;
    font-size: 10.5px;
  }

  .derslic-year-badge--desktop {
    --badge-size: 40px;
  }
}

@media (max-width: 1240px) {
  .navbar__links {
    display: none;
  }

  .navbar__hamburger {
    display: flex;
  }

  .navbar__login {
    display: none;
  }

  .navbar__actions {
    gap: 10px;
  }

  .navbar__cta {
    padding: 8px 14px;
    font-size: 12.5px;
  }

  .theme-switch__btn {
    padding: 5px 8px;
    font-size: 11px;
  }

  .derslic-year-badge--desktop {
    --badge-size: 42px;
  }
}

@media (max-width: 1140px) {

  .hero__atelier-inner {
    gap: 20px;
  }

  .blue-disc {
    width: 290px;
    height: 290px;
    left: 0;
    top: 70px;
  }

  .blue-disc > span:first-child {
    font-size: 220px;
  }

  .hero-ticket {
    width: 290px;
    top: 220px;
  }

  .hero-ticket b {
    font-size: 20px;
  }

  .small-sticker {
    top: 100px;
    width: 110px;
    height: 110px;
  }

  .scene-paper {
    padding: 20px 16px;
  }

  .paper-heading {
    gap: 7px;
  }

  .paper-heading h3 {
    font-size: 14px;
  }

  .paper-value {
    font-size: 22px;
  }

  .notification-value {
    font-size: 17px;
  }

  .conductor {
    width: 210px;
    height: 210px;
  }

  .run-scene {
    width: 125px;
    height: 125px;
  }

  .pain-points__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .pain-points__image {
    aspect-ratio: 16/9;
  }

  .comparison__grid {
    grid-template-columns: 1fr;
  }

  .features__content.active {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .reminders__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .student-mgmt__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --section-padding: 60px 0;
    --container-padding: 0 16px;
  }

  .navbar .container {
    padding: 0 16px;
  }

  .navbar__inner {
    gap: 12px;
  }

  #navbar .navbar__actions {
    display: none !important;
  }

  .navbar__brand {
    margin-right: 0;
  }

  .navbar__logo {
    min-width: 0;
    max-width: 140px;
    margin-right: 0;
  }

  .navbar__logo img {
    max-width: 130px;
    height: auto;
  }

  .derslic-year-badge--desktop {
    display: none !important;
  }

  .derslic-year-badge--mobile {
    display: inline-grid !important;
    --badge-size: 38px;
    margin-left: auto;
    margin-right: 10px;
    flex-shrink: 0;
    box-shadow: 0 2px 5px rgba(70, 18, 28, 0.2), 0 3px 8px rgba(70, 18, 28, 0.16);
  }

  .navbar__hamburger {
    display: flex;
    flex-shrink: 0;
    margin-left: 0;
  }

  .hero--atelier {
    padding: 30px 0 25px;
  }

  .hero__atelier-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
    min-height: auto;
  }

  .hero-copy {
    min-width: 0;
  }

  #heroTitle {
    font-size: clamp(40px, 10vw, 68px);
  }

  .hero-description {
    font-size: 16px;
  }

  .hero__features {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  derslic-course-day {
    max-width: 100%;
    margin: 0 auto;
  }

  .discipline-strip {
    padding: 18px 20px;
    font-size: 22px;
    gap: 16px;
    justify-content: flex-start;
  }

  .scene-intro > div {
    display: block;
    margin-bottom: 24px;
  }

  .scene-intro p {
    margin: 16px 0 0;
    font-size: 14px;
    max-width: 100%;
  }

  .live-stage {
    height: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    padding: 50px 16px 20px;
  }

  .stage-toolbar {
    font-size: 7px;
    padding: 14px 16px;
  }

  .connections {
    display: none;
  }

  .conductor {
    position: relative;
    left: auto;
    top: auto;
    transform: none;
    grid-column: 1 / -1;
    grid-row: 1;
    width: 200px;
    height: 200px;
    justify-self: center;
    margin: 5px 0 10px;
  }

  .scene-paper {
    position: relative;
    left: auto;
    right: auto;
    top: auto;
    bottom: auto;
    width: auto;
    min-width: 0;
    padding: 18px 12px;
    min-height: 160px;
    transform: none !important;
  }

  .scene-paper .paper-heading {
    gap: 7px;
    align-items: flex-start;
  }

  .scene-paper svg {
    width: 22px;
    height: 22px;
  }

  .scene-paper h3 {
    font-size: 13px;
  }

  .paper-value {
    font-size: 20px;
    white-space: normal;
    min-height: 42px;
    margin: 14px 0 6px;
  }

  .paper-value span {
    font-size: 15px;
  }

  .notification-value {
    font-size: 16px;
    line-height: 1.35;
  }

  .paper-caption {
    font-size: 10px;
    line-height: 1.4;
    display: block;
  }

  .paper-mark {
    right: 8px;
    bottom: 5px;
    font-size: 16px;
  }

  .stage-footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .steps__grid {
    grid-template-columns: 1fr;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
  }

  .course-types__grid {
    grid-template-columns: 1fr 1fr;
  }

  .metrics__grid {
    grid-template-columns: 1fr 1fr;
  }

  .pricing__grid {
    grid-template-columns: 1fr;
    max-width: 400px;
  }

  .pricing-card--featured {
    transform: none;
  }

  .solution-banner {
    margin-left: 24px;
    margin-right: 24px;
  }

  .cta-banner {
    margin-left: 24px;
    margin-right: 24px;
  }

  .footer__grid {
    grid-template-columns: 1fr;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .navbar__logo img {
    max-width: 110px;
  }

  .derslic-year-badge--mobile {
    --badge-size: 34px;
    margin-right: 8px;
  }

  .footer__legal-bar {
    justify-content: center;
  }

  #heroTitle {
    font-size: clamp(36px, 13vw, 54px);
  }

  .hero__buttons {
    flex-direction: column;
    align-items: stretch;
  }

  .hero__buttons .btn,
  .hero__buttons .ink-button {
    justify-content: center;
  }

  .hero-art {
    min-height: 520px;
  }

  .blue-disc {
    width: 260px;
    height: 260px;
    left: 0;
  }

  .blue-disc > span:first-child {
    font-size: 200px;
  }

  .small-sticker {
    width: 95px;
    height: 95px;
    font-size: 14px;
  }

  .small-sticker em {
    font-size: 15px;
  }

  .hero-ticket {
    width: 265px;
    top: 210px;
    padding: 16px;
  }

  .ticket-course b {
    font-size: 18px;
  }

  .keyboard button {
    height: 110px;
  }

  .keyboard-wrap {
    bottom: 20px;
  }

  .black-key {
    height: 68px;
  }

  .live-stage {
    padding-left: 10px;
    padding-right: 10px;
    gap: 10px;
  }

  .scene-paper {
    padding: 14px 8px;
  }

  .scene-paper h3 {
    font-size: 12px;
  }

  .pain-points__cards {
    grid-template-columns: 1fr;
  }

  .course-types__grid {
    grid-template-columns: 1fr;
  }

  .metrics__grid {
    grid-template-columns: 1fr;
  }

  .reminders__channels {
    flex-direction: column;
  }

  .reminders__mockup-card + .reminders__mockup-card {
    margin-left: 0;
    margin-top: 14px;
  }
}

/* ── Theme Adaptations & Visual Effects ── */
body,
.navbar,
.pain-card,
.step-card,
.comparison__card,
.live-stage,
.scene-paper,
.pricing-card,
.testimonial-card,
.footer,
.theme-switch,
.theme-switch__btn {
  transition: background-color 0.25s ease, border-color 0.25s ease, color 0.25s ease, box-shadow 0.25s ease;
}

/* Koyu Tema: Logo & Elemanlar */
[data-theme="dark"] .navbar__logo img,
[data-theme="dark"] .footer__logo img {
  filter: brightness(1.3) saturate(1.1);
}

[data-theme="dark"] .ink-button {
  background: #182838;
  color: #F1F5F9;
  border: 1px solid var(--line);
}

[data-theme="dark"] .ink-button:hover {
  background: #22374B;
}

[data-theme="dark"] .btn--primary {
  background: var(--blue);
  color: #0B131B;
  font-weight: 700;
}

[data-theme="dark"] .btn--primary:hover {
  background: var(--blue-hover);
  color: #FFFFFF;
}

[data-theme="dark"] .hero__feature-icon {
  background: var(--paper-card);
  border-color: var(--line);
  box-shadow: 2px 3px 0 rgba(0, 0, 0, 0.4);
}

[data-theme="dark"] .conductor-orbit {
  border-color: #38BDF8;
  color: #38BDF8;
}

[data-theme="dark"] .conductor-label,
[data-theme="dark"] .conductor-sub {
  color: #CBD5E1;
}

derslic-product-preview,
[data-theme="dark"] derslic-product-preview {
  --dp-blue: #0077df;
  --dp-ink: #1c3342;
  --dp-body: #f5f7f8;
}

/* Sanat Teması: Loş Işık, Sıcak Kahve & Kış Ambiyansı */
[data-theme="art"] .navbar__logo img,
[data-theme="art"] .footer__logo img {
  filter: sepia(0.85) hue-rotate(335deg) saturate(2.4) brightness(1.08);
}

[data-theme="art"] .hero--atelier {
  position: relative;
}

[data-theme="art"] .hero--atelier::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(circle at 70% 30%, rgba(226, 150, 93, 0.08) 0%, transparent 60%);
  z-index: 1;
}

[data-theme="art"] .ink-button {
  background: #33241D;
  color: #F6EDE3;
  border: 1px solid var(--line);
}

[data-theme="art"] .ink-button:hover {
  background: #443127;
}

[data-theme="art"] .btn--primary {
  background: var(--blue);
  color: #181310;
  font-weight: 700;
}

[data-theme="art"] .btn--primary:hover {
  background: var(--blue-hover);
  color: #FFFFFF;
}

[data-theme="art"] .hero__feature-icon {
  background: var(--paper-card);
  border-color: var(--line);
  box-shadow: 2px 3px 0 rgba(10, 6, 4, 0.35);
}


[data-theme="art"] .conductor-orbit {
  border-color: #E2965D;
  color: #E2965D;
}

[data-theme="art"] .conductor-label {
  color: #D5C2B2;
}

[data-theme="art"] .conductor-sub {
  color: #E2965D;
}

[data-theme="art"] derslic-product-preview {
  --dp-blue: #0077df;
  --dp-ink: #1c3342;
  --dp-body: #f5f7f8;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto !important;
  }

  *, *::before, *::after {
    animation: none !important;
    transition: none !important;
  }

  .keyboard button:active,
  .ink-button:hover span,
  .run-scene:active {
    transform: none !important;
  }
}