@import url("https://fonts.googleapis.com/css2?family=Playfair+Display:wght@500;700&family=Source+Sans+3:wght@400;600;700&display=swap");

:root {
  --ink: #1a1a1a;
  --muted: #5a5a5a;
  --accent: #e36f4c;
  --accent-dark: #c85530;
  --ocean: #1f4f5a;
  --paper: #f6f2ea;
  --sand: #f0e6d8;
  --card: #ffffff;
  --shadow: 0 20px 45px rgba(21, 24, 36, 0.12);
}

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

body {
  font-family: "Source Sans 3", sans-serif;
  color: var(--ink);
  background: radial-gradient(circle at top, #fef8ed 0%, #f7efe0 40%, #efe4d5 100%);
  min-height: 100vh;
}

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

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1100px, 92vw);
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 242, 234, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(31, 79, 90, 0.1);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 0;
}

.logo {
  font-family: "Playfair Display", serif;
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--ocean);
}

.nav {
  display: flex;
  gap: 18px;
  font-weight: 600;
  color: var(--muted);
}

.nav-link {
  padding: 6px 10px;
  border-radius: 999px;
  transition: background 0.2s ease, color 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  background: rgba(31, 79, 90, 0.1);
  color: var(--ocean);
}

.hero {
  padding: 80px 0 60px;
}

.hero-inner {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 12px;
}

.hero h1 {
  font-family: "Playfair Display", serif;
  font-size: clamp(2.5rem, 4vw, 3.4rem);
  margin-bottom: 12px;
}

.tagline {
  font-size: 1.2rem;
  color: var(--muted);
  margin-bottom: 24px;
  max-width: 520px;
}

.cta {
  display: inline-block;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 999px;
  font-weight: 700;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
  box-shadow: var(--shadow);
}

.cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 35px rgba(227, 111, 76, 0.35);
}

.hero-card {
  background: var(--card);
  padding: 28px;
  border-radius: 20px;
  box-shadow: var(--shadow);
  border: 1px solid rgba(31, 79, 90, 0.08);
  animation: floatIn 0.6s ease forwards;
}

.hero-card h2 {
  font-size: 1.2rem;
  margin-bottom: 16px;
}

.benefits {
  list-style: none;
  display: grid;
  gap: 12px;
  color: var(--muted);
}

.intro,
.about,
.contact {
  padding: 60px 0;
}

.intro h2,
.about h2,
.contact h2 {
  font-family: "Playfair Display", serif;
  margin-bottom: 12px;
}

.about-grid,
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 32px;
  align-items: start;
}

.book-card {
  background: var(--ocean);
  color: #fff;
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.book-card h3 {
  margin-bottom: 12px;
}

.ghost {
  display: inline-block;
  margin-top: 16px;
  padding: 10px 22px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #fff;
}

.contact-form {
  display: grid;
  gap: 16px;
  background: var(--card);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  color: var(--muted);
}

input,
textarea {
  border-radius: 12px;
  border: 1px solid rgba(31, 79, 90, 0.2);
  padding: 10px 14px;
  font: inherit;
}

button {
  border: none;
  background: var(--ocean);
  color: #fff;
  font-weight: 700;
  padding: 12px 20px;
  border-radius: 12px;
  cursor: pointer;
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.button-secondary {
  background: transparent;
  color: var(--ocean);
  border: 1px solid rgba(31, 79, 90, 0.4);
}

.modules-page {
  min-height: 70vh;
}

.modules-hero {
  padding: 60px 0 20px;
}

.modules-section {
  padding-bottom: 80px;
}

.modules-grid {
  display: grid;
  grid-template-columns: minmax(260px, 1fr) minmax(300px, 2fr);
  gap: 32px;
}

.modules-list {
  background: var(--card);
  border-radius: 20px;
  box-shadow: var(--shadow);
  padding: 24px;
  height: fit-content;
}

.modules-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 18px;
}

.progress-pill {
  background: rgba(31, 79, 90, 0.12);
  color: var(--ocean);
  padding: 6px 12px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.85rem;
}

.module-cards {
  display: grid;
  gap: 16px;
}

.module-card {
  border: 1px solid rgba(31, 79, 90, 0.1);
  border-radius: 16px;
  padding: 16px;
  display: grid;
  gap: 10px;
  background: #fff;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.module-card:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(21, 24, 36, 0.12);
}

.module-card.completed {
  border-color: rgba(227, 111, 76, 0.6);
  background: rgba(227, 111, 76, 0.08);
}

.module-card h3 {
  font-size: 1rem;
}

.module-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

.module-card button {
  justify-self: start;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--accent);
}

.module-viewer {
  display: grid;
}

.module-viewer-card {
  background: var(--card);
  border-radius: 20px;
  padding: 28px;
  box-shadow: var(--shadow);
  min-height: 420px;
  animation: floatIn 0.5s ease forwards;
}

.module-viewer-card h2 {
  margin-bottom: 12px;
  font-family: "Playfair Display", serif;
}

.module-meta {
  color: var(--muted);
  margin-bottom: 16px;
}

.quiz-question {
  margin: 16px 0;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(31, 79, 90, 0.1);
  background: rgba(31, 79, 90, 0.04);
}

.quiz-question h4 {
  margin-bottom: 10px;
}

.quiz-options {
  display: grid;
  gap: 8px;
}

.quiz-options button {
  background: #fff;
  color: var(--ink);
  border: 1px solid rgba(31, 79, 90, 0.2);
  border-radius: 10px;
  padding: 10px 14px;
  text-align: left;
}

.quiz-options button.correct {
  border-color: #3c9d6d;
  background: rgba(60, 157, 109, 0.12);
}

.quiz-options button.incorrect {
  border-color: #d95c5c;
  background: rgba(217, 92, 92, 0.12);
}

.module-timer {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(227, 111, 76, 0.12);
  color: var(--accent-dark);
  font-weight: 700;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.quiz-summary {
  margin-top: 14px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(31, 79, 90, 0.08);
  color: var(--muted);
  font-weight: 600;
}

.trivia-board {
  display: grid;
  gap: 12px;
  padding: 12px;
  border-radius: 14px;
  background: rgba(31, 79, 90, 0.08);
  color: var(--ocean);
}

.trivia-score {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  font-weight: 600;
}

.lesson-section {
  margin-bottom: 18px;
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(31, 79, 90, 0.12);
  background: #fff;
}

.lesson-section iframe {
  width: 100%;
  min-height: 240px;
  border-radius: 12px;
  border: none;
}

.playground {
  display: grid;
  gap: 12px;
}

.playground textarea {
  min-height: 180px;
  font-family: "Courier New", monospace;
  background: #0f172a;
  color: #f8fafc;
  border: none;
}

.playground-output {
  background: #111827;
  color: #e2e8f0;
  padding: 12px;
  border-radius: 12px;
  min-height: 80px;
  font-family: "Courier New", monospace;
  white-space: pre-wrap;
}

.flashcard {
  perspective: 1000px;
  width: 100%;
  max-width: 480px;
  margin: 20px auto;
}

.flashcard-inner {
  position: relative;
  width: 100%;
  min-height: 220px;
  transform-style: preserve-3d;
  transition: transform 0.6s ease;
}

.flashcard.flipped .flashcard-inner {
  transform: rotateY(180deg);
}

.flashcard-face {
  position: absolute;
  width: 100%;
  min-height: 220px;
  backface-visibility: hidden;
  border-radius: 16px;
  box-shadow: var(--shadow);
  display: grid;
  place-items: center;
  padding: 24px;
  font-size: 1.1rem;
  text-align: center;
}

.flashcard-front {
  background: #fff;
  border: 1px solid rgba(31, 79, 90, 0.1);
}

.flashcard-back {
  background: var(--ocean);
  color: #fff;
  transform: rotateY(180deg);
}

.flashcard-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-top: 16px;
}

.mnemonic-grid {
  display: grid;
  gap: 16px;
}

.mnemonic-card {
  border-radius: 14px;
  border: 1px solid rgba(31, 79, 90, 0.12);
  padding: 16px;
  background: #fff;
  display: grid;
  gap: 8px;
}

.mnemonic-list {
  list-style: none;
  display: grid;
  gap: 10px;
  margin-top: 12px;
  color: var(--muted);
}

.mnemonic-list li {
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(31, 79, 90, 0.06);
}

.completion-banner {
  margin-top: 18px;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(60, 157, 109, 0.12);
  color: #2c6b4e;
  font-weight: 600;
}

.auth-page,
.insights-page {
  min-height: 70vh;
}

.admin-page {
  min-height: 70vh;
}

.auth-hero,
.insights-hero {
  padding: 60px 0 20px;
}

.admin-hero {
  padding: 60px 0 20px;
}

.auth-section,
.insights-section {
  padding-bottom: 80px;
}

.admin-section {
  padding-bottom: 80px;
}

.auth-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.auth-card {
  background: var(--card);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 14px;
}

.form-message {
  font-size: 0.9rem;
  color: var(--muted);
  min-height: 20px;
}

.insights-grid {
  display: grid;
  gap: 24px;
}

.insights-card {
  background: var(--card);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.admin-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 24px;
}

.admin-card {
  background: var(--card);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 16px;
}

.admin-card textarea {
  width: 100%;
  min-height: 320px;
  font-family: "Courier New", monospace;
}

.admin-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
}

.inline-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.inline-form input,
.inline-form select {
  flex: 1;
  min-width: 180px;
}

.list-stack {
  list-style: none;
  display: grid;
  gap: 10px;
}

.list-stack li {
  padding: 12px 14px;
  border-radius: 12px;
  background: rgba(31, 79, 90, 0.06);
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: center;
}

.list-stack li span {
  color: var(--muted);
  font-size: 0.9rem;
}

.cohort-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}

.cohort-actions input {
  min-width: 160px;
  flex: 1;
}

.ranking-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
}

.ranking-list {
  padding-left: 18px;
  color: var(--muted);
}

.ranking-list li {
  margin: 6px 0;
}

.difficulty-section {
  display: grid;
  gap: 8px;
}

.site-footer {
  padding: 28px 0 40px;
  border-top: 1px solid rgba(31, 79, 90, 0.08);
  background: rgba(246, 242, 234, 0.7);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 16px;
}

@keyframes floatIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .nav {
    flex-wrap: wrap;
    justify-content: flex-end;
  }

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

@media (max-width: 640px) {
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .nav {
    width: 100%;
    justify-content: flex-start;
  }

  .hero {
    padding-top: 50px;
  }
}