:root {
  --bilgi-red: #ed1b2f;
  --bilgi-red-dark: #c91427;
  --ink: #111111;
  --ink-soft: #393939;
  --muted: #686868;
  --paper: #f7f5f1;
  --surface: #ffffff;
  --line: #dfdcd5;
  --warm: #eeeae3;
  --shadow: 0 24px 70px rgba(15, 15, 15, 0.13);
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--paper);
  color: var(--ink);
  font-family: "Inter", Arial, sans-serif;
  line-height: 1.5;
}

button,
a {
  -webkit-tap-highlight-color: transparent;
}

button {
  font: inherit;
}

.launch-header {
  background:
    radial-gradient(circle at 82% 20%, rgba(237, 27, 47, 0.10), transparent 28%),
    linear-gradient(135deg, #fbfaf8 0%, #f2eee8 100%);
  min-height: 100vh;
  overflow: hidden;
  position: relative;
}

.launch-header::before {
  background: var(--bilgi-red);
  content: "";
  height: 6px;
  left: 0;
  position: absolute;
  right: 0;
  top: 0;
}

.navbar {
  align-items: center;
  display: flex;
  justify-content: space-between;
  margin: 0 auto;
  padding: 28px 0 20px;
  position: relative;
  width: min(1200px, 92%);
  z-index: 10;
}

.institution-brand {
  display: inline-flex;
}

.institution-brand img {
  display: block;
  height: auto;
  max-width: 280px;
  width: min(280px, 38vw);
}

.nav-links {
  align-items: center;
  display: flex;
  gap: 8px;
}

.nav-links a {
  color: var(--ink);
  font-size: 14px;
  font-weight: 700;
  padding: 10px 13px;
  text-decoration: none;
}

.nav-links a:hover {
  color: var(--bilgi-red);
}

.nav-login-btn,
.primary-btn,
.secondary-btn,
.text-link {
  border: 0;
  cursor: pointer;
  font-weight: 800;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
}

.nav-login-btn,
.primary-btn {
  background: var(--bilgi-red);
  color: white;
}

.nav-login-btn {
  border-radius: 4px;
  margin-left: 10px;
  padding: 12px 20px;
}

.primary-btn,
.secondary-btn {
  border-radius: 4px;
  padding: 16px 25px;
}

.secondary-btn {
  background: transparent;
  border: 1px solid var(--ink);
  color: var(--ink);
}

.nav-login-btn:hover,
.primary-btn:hover {
  background: var(--bilgi-red-dark);
  box-shadow: 0 14px 32px rgba(237, 27, 47, 0.22);
  transform: translateY(-2px);
}

.secondary-btn:hover {
  background: var(--ink);
  color: white;
  transform: translateY(-2px);
}

.hero {
  align-items: center;
  display: grid;
  gap: 76px;
  grid-template-columns: minmax(0, 1fr) minmax(400px, 0.85fr);
  margin: 0 auto;
  min-height: calc(100vh - 110px);
  padding: 50px 0 80px;
  width: min(1200px, 92%);
}

.program-label {
  align-items: center;
  color: var(--ink-soft);
  display: flex;
  font-size: 13px;
  font-weight: 700;
  gap: 9px;
  margin-bottom: 40px;
}

.program-dot {
  background: var(--bilgi-red);
  border-radius: 50%;
  height: 9px;
  width: 9px;
}

.eyebrow {
  color: var(--bilgi-red);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.hero h1 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(48px, 5.4vw, 76px);
  letter-spacing: -0.045em;
  line-height: 0.98;
  margin: 16px 0 28px;
}

.hero h1 span {
  color: var(--bilgi-red);
}

.hero-copy {
  color: var(--ink-soft);
  font-size: 18px;
  line-height: 1.75;
  max-width: 670px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-meta {
  border-top: 1px solid var(--line);
  display: flex;
  gap: 38px;
  margin-top: 48px;
  max-width: 580px;
  padding-top: 24px;
}

.hero-meta div {
  align-items: baseline;
  display: flex;
  gap: 8px;
}

.hero-meta strong {
  font-size: 20px;
}

.hero-meta span {
  color: var(--muted);
  font-size: 12px;
  font-weight: 600;
}

.hero-visual {
  padding: 34px 0 0 34px;
  position: relative;
}

.visual-accent {
  background: var(--bilgi-red);
  height: calc(100% - 34px);
  left: 0;
  position: absolute;
  top: 0;
  width: calc(100% - 34px);
}

.platform-preview {
  background: white;
  box-shadow: var(--shadow);
  min-height: 540px;
  overflow: hidden;
  position: relative;
}

.preview-topbar {
  align-items: center;
  border-bottom: 1px solid #e8e8e8;
  display: flex;
  justify-content: space-between;
  padding: 20px 22px;
}

.preview-brand {
  align-items: center;
  display: flex;
  gap: 12px;
}

.preview-brand div {
  display: grid;
}

.preview-brand strong {
  font-size: 14px;
}

.preview-brand small {
  color: var(--muted);
  font-size: 9px;
}

.preview-mark {
  background: var(--bilgi-red);
  color: white;
  display: grid;
  font-family: Georgia, serif;
  font-weight: 700;
  height: 38px;
  place-items: center;
  width: 38px;
}

.level-pill {
  background: #111;
  color: white;
  font-size: 12px;
  font-weight: 800;
  padding: 7px 10px;
}

.preview-content {
  padding: 34px 30px;
}

.preview-kicker {
  color: var(--bilgi-red);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.preview-content h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: 30px;
  line-height: 1.12;
  margin: 10px 0 12px;
}

.preview-content > p {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.question-preview {
  background: #f7f5f1;
  margin-top: 24px;
  padding: 20px;
}

.question-preview > span {
  color: var(--muted);
  font-size: 10px;
  font-weight: 700;
}

.question-preview > strong {
  display: block;
  font-size: 13px;
  margin: 8px 0 14px;
}

.answer {
  background: white;
  border: 1px solid #dfdcd5;
  color: var(--ink-soft);
  font-size: 11px;
  margin-top: 8px;
  padding: 10px 12px;
}

.answer.selected {
  border-color: var(--bilgi-red);
  box-shadow: inset 3px 0 var(--bilgi-red);
}

.preview-progress {
  display: grid;
  grid-template-columns: 1fr auto;
  margin-top: 24px;
}

.preview-progress span,
.preview-progress strong {
  font-size: 11px;
}

.preview-progress div {
  background: #e7e4de;
  grid-column: 1 / -1;
  height: 6px;
  margin-top: 8px;
}

.preview-progress i {
  background: var(--bilgi-red);
  display: block;
  height: 100%;
  width: 72%;
}

.section {
  margin: 0 auto;
  padding: 112px 0;
  width: min(1200px, 92%);
}

.section-heading {
  max-width: 760px;
}

.section-heading h2,
.learning-copy h2,
.teacher-copy h2,
.level-band h2,
.final-cta h2 {
  font-family: "Source Serif 4", Georgia, serif;
  font-size: clamp(36px, 4.5vw, 58px);
  letter-spacing: -0.035em;
  line-height: 1.08;
  margin: 14px 0 20px;
}

.section-heading > p:last-child,
.learning-copy > p,
.teacher-copy > p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.75;
}

.feature-grid {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  margin-top: 52px;
}

.feature-card {
  background: var(--surface);
  border: 1px solid var(--line);
  min-height: 290px;
  padding: 34px;
}

.feature-card-dark {
  background: var(--ink);
  border-color: var(--ink);
  color: white;
}

.feature-number {
  color: var(--bilgi-red);
  font-size: 13px;
  font-weight: 800;
}

.feature-card h3 {
  font-size: 24px;
  line-height: 1.2;
  margin: 86px 0 13px;
}

.feature-card p {
  color: var(--muted);
  line-height: 1.65;
}

.feature-card-dark p {
  color: #c5c5c5;
}

.learning-section {
  align-items: start;
  display: grid;
  gap: 90px;
  grid-template-columns: 0.9fr 1.1fr;
}

.learning-copy {
  position: sticky;
  top: 120px;
}

.text-link {
  background: transparent;
  border-bottom: 2px solid var(--bilgi-red);
  color: var(--ink);
  margin-top: 30px;
  padding: 0 0 7px;
}

.text-link span {
  color: var(--bilgi-red);
  margin-left: 10px;
}

.learning-step {
  align-items: flex-start;
  border-bottom: 1px solid var(--line);
  display: grid;
  gap: 22px;
  grid-template-columns: 54px 1fr;
  padding: 26px 0;
}

.learning-step:first-child {
  padding-top: 0;
}

.learning-step > span {
  border: 1px solid var(--bilgi-red);
  color: var(--bilgi-red);
  display: grid;
  font-size: 14px;
  font-weight: 800;
  height: 44px;
  place-items: center;
  width: 44px;
}

.learning-step strong {
  display: block;
  font-size: 20px;
  margin-bottom: 7px;
}

.learning-step p {
  color: var(--muted);
}

.level-band {
  align-items: center;
  background: var(--bilgi-red);
  color: white;
  display: grid;
  gap: 60px;
  grid-template-columns: 0.75fr 1.25fr;
  padding: 76px max(4%, calc((100% - 1200px) / 2));
}

.level-band .eyebrow {
  color: white;
  opacity: 0.72;
}

.level-band h2 {
  margin-bottom: 0;
}

.levels {
  display: grid;
  gap: 10px;
  grid-template-columns: repeat(6, minmax(0, 1fr));
}

.levels span {
  border: 1px solid rgba(255, 255, 255, 0.5);
  display: grid;
  font-size: 22px;
  font-weight: 800;
  height: 78px;
  place-items: center;
}

.teacher-section {
  width: min(1200px, 92%);
}

.teacher-panel {
  align-items: center;
  background: var(--ink);
  color: white;
  display: grid;
  gap: 80px;
  grid-template-columns: 1fr 0.9fr;
  padding: 74px;
}

.teacher-copy > p {
  color: #c5c5c5;
}

.teacher-copy .primary-btn {
  margin-top: 30px;
}

.dashboard-card {
  background: white;
  color: var(--ink);
  padding: 28px;
}

.dashboard-heading {
  align-items: start;
  border-bottom: 1px solid #e8e8e8;
  display: flex;
  justify-content: space-between;
  padding-bottom: 18px;
}

.dashboard-heading div {
  display: grid;
}

.dashboard-heading small {
  color: var(--bilgi-red);
  font-size: 9px;
  font-weight: 800;
  letter-spacing: 0.1em;
}

.dashboard-heading strong {
  font-size: 18px;
  margin-top: 5px;
}

.dashboard-heading > span {
  background: #f3f1ed;
  color: var(--muted);
  font-size: 10px;
  padding: 7px 9px;
}

.dashboard-stat {
  align-items: center;
  border-bottom: 1px solid #eee;
  display: flex;
  justify-content: space-between;
  padding: 17px 0;
}

.dashboard-stat span {
  color: var(--muted);
  font-size: 12px;
}

.dashboard-stat strong {
  font-size: 23px;
}

.dashboard-chart {
  align-items: end;
  border-bottom: 1px solid #ddd;
  display: flex;
  gap: 12px;
  height: 140px;
  margin-top: 22px;
}

.dashboard-chart i {
  background: var(--bilgi-red);
  display: block;
  flex: 1;
  min-height: 10px;
  opacity: 0.85;
}

.final-cta {
  background: var(--warm);
  padding: 100px 20px;
  text-align: center;
}

.final-cta > p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
  margin: 0 auto 30px;
}

.footer {
  align-items: center;
  background: white;
  border-top: 1px solid var(--line);
  display: grid;
  gap: 28px;
  grid-template-columns: auto 1fr auto;
  padding: 34px max(4%, calc((100% - 1200px) / 2));
}

.footer img {
  height: auto;
  width: 190px;
}

.footer strong {
  font-size: 14px;
}

.footer p {
  color: var(--muted);
  font-size: 12px;
}

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

@media (max-width: 980px) {
  .nav-links a {
    display: none;
  }

  .hero {
    gap: 58px;
    grid-template-columns: 1fr;
    padding-top: 70px;
  }

  .hero-text {
    max-width: 780px;
  }

  .hero-visual {
    max-width: 640px;
  }

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

  .feature-card {
    min-height: auto;
  }

  .feature-card h3 {
    margin-top: 48px;
  }

  .learning-section,
  .level-band,
  .teacher-panel {
    grid-template-columns: 1fr;
  }

  .learning-copy {
    position: static;
  }

  .levels {
    grid-template-columns: repeat(3, 1fr);
  }

  .teacher-panel {
    gap: 54px;
    padding: 54px;
  }
}

@media (max-width: 640px) {
  .navbar {
    padding-top: 22px;
  }

  .institution-brand img {
    width: 190px;
  }

  .nav-login-btn {
    margin-left: 0;
    padding: 10px 15px;
  }

  .hero {
    padding: 50px 0 64px;
  }

  .program-label {
    margin-bottom: 28px;
  }

  .hero h1 {
    font-size: 46px;
  }

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

  .hero-buttons {
    display: grid;
  }

  .hero-meta {
    align-items: flex-start;
    gap: 15px;
    justify-content: space-between;
  }

  .hero-meta div {
    align-items: flex-start;
    display: grid;
  }

  .hero-visual {
    padding: 18px 0 0 18px;
  }

  .visual-accent {
    height: calc(100% - 18px);
    width: calc(100% - 18px);
  }

  .platform-preview {
    min-height: auto;
  }

  .preview-content {
    padding: 26px 20px;
  }

  .section {
    padding: 78px 0;
  }

  .feature-card {
    padding: 27px;
  }

  .learning-section {
    gap: 55px;
  }

  .level-band {
    gap: 35px;
    padding-bottom: 60px;
    padding-top: 60px;
  }

  .levels {
    grid-template-columns: repeat(2, 1fr);
  }

  .teacher-panel {
    gap: 44px;
    padding: 38px 24px;
  }

  .footer {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .footer img {
    margin: 0 auto;
  }
}