@import url("https://fonts.googleapis.com/css2?family=Dancing+Script:wght@600&display=swap");

:root {
  color-scheme: light;
  --bg: #f5f7fb;
  --surface: #ffffff;
  --primary: #1f6f3a;
  --primary-dark: #16512a;
  --text: #0f1c3f;
  --muted: #5b6b8a;
  --accent: #20c997;
  --shadow: 0 18px 45px rgba(15, 28, 63, 0.12);
  --border: #e6ebf5;
}

[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f141d;
  --surface: #171f2b;
  --primary: #2e8b57;
  --primary-dark: #1f6a41;
  --text: #f5f7fb;
  --muted: #a3b0c6;
  --accent: #29d38c;
  --shadow: 0 18px 45px rgba(0, 0, 0, 0.35);
  --border: #273345;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  font-family: "Inter", "Segoe UI", sans-serif;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

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

input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
input[type="search"],
input[type="url"],
input[type="tel"],
input[type="date"],
input[type="time"],
input[type="datetime-local"],
textarea {
  font-size: 2.2rem;
  padding: 24px 32px;
  border-radius: 16px;
  height: 72px;
}

.site-header {
  background: var(--surface);
  padding: 24px 5vw 70px;
  border-bottom: 1px solid var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 40px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.hero-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.hero-actions {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

html[data-text-size="large"] {
  font-size: 112.5%;
}

.brand-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.brand-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  display: grid;
  place-items: center;
  font-size: 16px;
}

.brand-name {
  font-size: 18px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 22px;
  font-weight: 600;
}

select {
  font-size: 1.05em !important;
  padding: 8px 12px !important;
  border-radius: 8px;
}

option {
  font-size: 1em !important;
}

option {
  font-size: 1.3em;
}
  color: var(--muted);
}

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

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  border: none;
  background: transparent;
  cursor: pointer;
}

.menu-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text);
  display: block;
}

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

.hero-content h1 {
  font-size: clamp(2rem, 4vw, 3.3rem);
  margin: 12px 0 16px;
}

.hero-script {
  font-family: "Dancing Script", "Brush Script MT", "Segoe Script", cursive;
}

.hero-badge {
  background: rgba(47, 91, 255, 0.1);
  color: var(--primary-dark);
  display: inline-flex;
  padding: 6px 14px;
  border-radius: 999px;
  font-weight: 600;
}

.hero-quote {
  margin-top: 8px;
  color: var(--muted);
  font-weight: 600;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 22px;
  border-radius: 12px;
  border: 1px solid transparent;
  font-weight: 600;
  transition: 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.btn.primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow);
}

.btn.primary:hover {
  background: var(--primary-dark);
}

.btn.ghost {
  border-color: rgba(47, 91, 255, 0.3);
  color: var(--primary);
  background: transparent;
}

.hero-card {
  background: var(--surface);
  padding: 24px;
  border-radius: 20px;
  box-shadow: var(--shadow);
}

.hero-card ul {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.section {
  padding: 70px 8vw;
}

.section.alt {
  background: #fff;
}

.section-title {
  text-align: center;
  margin-bottom: 42px;
}

.section-title h2 {
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  margin-bottom: 10px;
}

.section-title p {
  color: var(--muted);
}

.grid {
  display: grid;
  gap: 22px;
}

.grid.two {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

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

.card {
  background: var(--surface);
  padding: 24px;
  border-radius: 18px;
  box-shadow: var(--shadow);
}

.card h3 {
  margin-bottom: 10px;
}

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

.timeline {
  display: grid;
  gap: 18px;
  max-width: 800px;
  margin: 0 auto;
}

.step {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 16px;
  align-items: flex-start;
  background: var(--surface);
  flex-wrap: wrap;
  gap: 10px;
  padding: 18px 22px;
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.step-number {
  width: 40px;

.progress-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  margin-top: 16px;
}

.countdown-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  align-items: flex-end;
  margin-top: 12px;
}

.countdown-controls input[type="date"] {
  padding: 12px 16px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
    font-size: 0.65em;
  height: auto;
}

.countdown-display {
  margin-top: 14px;
  font-weight: 700;
  color: var(--primary);
}

.timer-controls {
  display: grid;
  gap: 12px;
  margin-top: 12px;
}

.timer-controls input[type="number"] {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
    font-size: 0.65em;
}

.timer-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.timer-display {
  margin-top: 14px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary);
}

.progress-stat {
  background: rgba(46, 139, 87, 0.08);
  border-radius: 14px;
  padding: 14px 16px;
}

.progress-value {
  font-size: 1.6rem;
  font-weight: 700;
  color: var(--text);
}

.progress-label {
  color: var(--muted);
  font-weight: 600;
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
}

.badge {
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px dashed var(--border);
  color: var(--muted);
  font-weight: 600;
  font-size: 0.85rem;
}

.badge.earned {
  border-style: solid;
  color: var(--primary);
  background: rgba(46, 139, 87, 0.12);
}

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

.review-list {
  display: grid;
  gap: 14px;
  margin-top: 16px;
}

.review-item {
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 16px;
  background: var(--surface);
}

.review-question {
  font-weight: 700;
}

.review-meta {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 6px 0;
}

.review-answer {
  color: var(--muted);
  font-weight: 600;
}
  height: 40px;
  border-radius: 12px;
  background: var(--accent);
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
}

.contact-form label {
  display: grid;
  gap: 6px;
  font-weight: 600;
  margin-bottom: 12px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid #dde3f0;
}

.form-note {
  font-size: 0.85rem;
  color: var(--muted);
  margin-top: 10px;
}

#timerDisplay {
  color: var(--primary);
  font-weight: 700;
}

.footer {
  padding: 30px 8vw 50px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}

.back-to-top {
  font-weight: 600;
  color: var(--primary);
}

.app-hero {
  display: grid;
  gap: 24px;
  align-items: center;
}

.app {
  display: grid;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.quiz-controls {
  display: grid;
  gap: 16px;
}

#scienceTopics {
  margin-top: 28px;
}

.control {
  display: grid;
  gap: 8px;
  font-weight: 600;
}

.control select {
  padding: 10px 12px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  font-size: 1.3em;
}

.control-row {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 500;
  color: var(--muted);
}

.theme-toggle {
  white-space: nowrap;
}

.quiz-card {
  display: grid;
  gap: 18px;
}


.question-figure {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 12px;
}

.question-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 12px;
}

.question-caption {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--muted);
}

.status {
  display: flex;
  justify-content: space-between;
  font-weight: 600;
  color: var(--muted);
}

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

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

.flashcard-info {
  background: #fff;
  border: 1px solid #dde3f0;
  border-radius: 16px;
  padding: 16px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 10px;
}

.flashcard-question {
  font-weight: 700;
  color: var(--text);
}

.flashcard-answer {
  color: var(--muted);
  font-weight: 600;
}

.flashcard-bullets,
.flashcard-links {
  margin: 0;
  padding-left: 18px;
  color: var(--muted);
  display: grid;
  gap: 6px;
}

.flashcard-links a {
  color: var(--primary);
  word-break: break-all;
}

.flashcard-panel {
  display: grid;
  gap: 14px;
}

.flashcard-label {
  color: var(--muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  font-size: 0.75rem;
}

.flashcard-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.flashcard {
  position: relative;
  min-height: 160px;
  border: none;
  border-radius: 16px;
  background: transparent;
  perspective: 1000px;
  cursor: pointer;
}

.flashcard-face {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid #dde3f0;
  font-weight: 600;
  text-align: center;
  backface-visibility: hidden;
  transition: transform 0.4s ease;
}

.flashcard-front {
  transform: rotateY(0deg);
}

.flashcard-back {
  transform: rotateY(180deg);
  background: rgba(47, 91, 255, 0.08);
  border-color: rgba(47, 91, 255, 0.25);
}

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

.flashcard.is-flipped .flashcard-back {
  transform: rotateY(0deg);
}

.option {
  border: 1px solid #dde3f0;
  background: #fff;
  padding: 12px 14px;
  border-radius: 12px;
  text-align: left;
  font-weight: 600;
  cursor: pointer;
  transition: 0.2s ease;
}

.option:hover {
  border-color: rgba(47, 91, 255, 0.5);
  color: var(--primary);
}

.option.correct {
  border-color: rgba(32, 201, 151, 0.6);
  background: rgba(32, 201, 151, 0.12);
  color: #0f5b46;
}

.option.wrong {
  border-color: rgba(255, 99, 132, 0.6);
  background: rgba(255, 99, 132, 0.12);
  color: #8a1f36;
}

.option:disabled {
  cursor: not-allowed;
  opacity: 0.85;
}

.topic-spec {
  color: var(--muted);
  font-weight: 600;
  margin-top: -8px;
}

.hidden {
  display: none;
}

.result-links {
  margin-top: 16px;
  display: grid;
  gap: 10px;
}

.result-links ul {
  padding-left: 18px;
  color: var(--muted);
}

.result-links a {
  color: var(--primary);
  word-break: break-all;
}

.confetti-container {
  position: fixed;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  z-index: 999;
}

.confetti-piece {
  position: absolute;
  width: 10px;
  height: 14px;
  opacity: 0.9;
  border-radius: 2px;
  animation: confetti-fall 2.6s ease-out forwards;
}

@keyframes confetti-fall {
  0% {
    transform: translateY(-10vh) rotate(0deg);
  }
  100% {
    transform: translateY(110vh) rotate(360deg);
  }
}

@media (prefers-reduced-motion: reduce) {
  .confetti-piece {
    animation: none;
  }
}

.resources-card {
  display: grid;
  gap: 10px;
}

.resources-card ul {
  padding-left: 18px;
  color: var(--muted);
}

.resources-card a {
  color: var(--primary);
  word-break: break-all;
}

@media (max-width: 760px) {
  .nav-links {
    position: absolute;
    top: 70px;
    right: 5vw;
    background: var(--surface);
    padding: 18px 20px;
    border-radius: 16px;
    border: 1px solid var(--border);
    background: var(--surface);
    gap: 14px;
    display: none;
  }

  .nav-links.open {
    display: flex;
  }

  .menu-toggle {
    display: flex;
  }
}