@import url("https://fonts.googleapis.com/css2?family=Sora:wght@400;500;600;700;800&family=DM+Sans:wght@400;500;700&display=swap");

:root {
  --bg: #f2f7fb;
  --surface: #ffffff;
  --surface-2: #f9fcff;
  --text: #122231;
  --muted: #5a6d80;
  --primary: #1f8fdd;
  --primary-strong: #126cb0;
  --accent: #ff8b3e;
  --success: #2fb58a;
  --border: #d6e3ee;
  --shadow-soft: 0 12px 30px rgba(18, 34, 49, 0.08);
  --shadow-strong: 0 20px 50px rgba(31, 143, 221, 0.2);
  --radius-md: 16px;
  --radius-lg: 24px;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "DM Sans", "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 10% 10%, rgba(31, 143, 221, 0.22), transparent 33%),
    radial-gradient(circle at 85% 12%, rgba(255, 139, 62, 0.2), transparent 37%),
    linear-gradient(180deg, #f5f9fd 0%, #eef4fa 100%);
  min-height: 100vh;
  line-height: 1.6;
}

h1,
h2,
h3,
h4 {
  margin: 0 0 0.75rem;
  line-height: 1.2;
  font-family: "Sora", "Segoe UI", sans-serif;
}

p {
  margin: 0 0 1rem;
}

a {
  color: inherit;
}

.container {
  width: min(1140px, 92vw);
  margin-inline: auto;
}

.bg-orb {
  position: fixed;
  z-index: -2;
  border-radius: 999px;
  filter: blur(26px);
  opacity: 0.48;
  pointer-events: none;
}

.orb-one {
  width: 320px;
  height: 320px;
  left: -90px;
  top: 10%;
  background: #74c5ff;
}

.orb-two {
  width: 360px;
  height: 360px;
  right: -120px;
  top: 24%;
  background: #ffc39d;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(12px);
  background: rgba(242, 247, 251, 0.86);
  border-bottom: 1px solid rgba(214, 227, 238, 0.9);
}

.nav-shell {
  min-height: 76px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.logo {
  text-decoration: none;
  font-family: "Sora", "Segoe UI", sans-serif;
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
}

.logo span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 12px;
  margin-right: 0.4rem;
  background: linear-gradient(135deg, var(--primary), #4ab2ff);
  color: #fff;
  box-shadow: var(--shadow-soft);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-link {
  text-decoration: none;
  color: var(--muted);
  font-weight: 600;
  padding: 0.52rem 0.9rem;
  border-radius: 999px;
  transition: 0.25s ease;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(31, 143, 221, 0.12);
}

.nav-link.active {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-strong));
  box-shadow: 0 8px 20px rgba(31, 143, 221, 0.35);
}

.menu-btn {
  display: none;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.48rem 0.8rem;
  font-weight: 700;
}

main section {
  margin-top: 3.2rem;
}

.hero-section {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 1.2rem;
  align-items: center;
  padding-top: 1.1rem;
}

.page-hero {
  max-width: 860px;
  padding-top: 1rem;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--primary-strong);
  background: rgba(31, 143, 221, 0.14);
  border: 1px solid rgba(31, 143, 221, 0.35);
  border-radius: 999px;
  padding: 0.35rem 0.8rem;
  margin-bottom: 1rem;
}

.hero-content h1,
.page-hero h1 {
  font-size: clamp(2rem, 4.5vw, 3.55rem);
}

.hero-text,
.page-hero p {
  color: var(--muted);
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.3rem;
}

.btn {
  appearance: none;
  border: 0;
  text-decoration: none;
  border-radius: 14px;
  font-weight: 700;
  padding: 0.78rem 1.15rem;
  cursor: pointer;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  color: #fff;
  background: linear-gradient(120deg, var(--primary), var(--primary-strong));
  box-shadow: 0 10px 24px rgba(18, 108, 176, 0.32);
}

.btn-primary:hover {
  box-shadow: 0 12px 30px rgba(18, 108, 176, 0.45);
}

.btn-ghost {
  background: #fff;
  color: var(--primary-strong);
  border: 1px solid var(--border);
}

.hero-cards {
  position: relative;
  display: grid;
  gap: 0.8rem;
}

.mini-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: var(--shadow-soft);
}

.mini-card h3 {
  font-size: 1.65rem;
  margin-bottom: 0.35rem;
}

.mini-card p {
  color: var(--muted);
  margin: 0;
}

.mini-kicker {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--primary-strong);
  margin-bottom: 0.45rem;
}

.float-a {
  animation: floatY 4s ease-in-out infinite;
}

.float-b {
  animation: floatY 4.5s ease-in-out infinite 0.4s;
}

.float-c {
  animation: floatY 5.2s ease-in-out infinite 0.8s;
}

@keyframes floatY {
  0% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
  100% {
    transform: translateY(0);
  }
}

.section-head {
  margin-bottom: 1rem;
}

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

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0.9rem;
}

.stat-card {
  background: linear-gradient(155deg, #ffffff 0%, #f7fbff 100%);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  box-shadow: var(--shadow-soft);
}

.stat-value {
  font-family: "Sora", "Segoe UI", sans-serif;
  font-size: 2.05rem;
  font-weight: 800;
  margin: 0;
  color: var(--primary-strong);
}

.stat-label {
  margin: 0.45rem 0 0;
  color: var(--muted);
}

.feature-grid,
.role-cards,
.timeline-grid,
.contact-cards {
  display: grid;
  gap: 0.95rem;
}

.feature-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-grid.two-col {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature-grid.three-col {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.feature-card,
.role-card,
.timeline-card,
.contact-card,
.exercise-card,
.form-card,
.faq-card {
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow-soft);
  padding: 1.2rem;
}

.feature-card,
.exercise-card,
.timeline-card {
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.feature-card:hover,
.exercise-card:hover,
.timeline-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-strong);
  border-color: rgba(31, 143, 221, 0.35);
}

.feature-badge,
.card-tag {
  display: inline-flex;
  background: rgba(31, 143, 221, 0.13);
  color: var(--primary-strong);
  font-weight: 700;
  border-radius: 999px;
  padding: 0.3rem 0.72rem;
  font-size: 0.77rem;
  margin-bottom: 0.7rem;
}

.highlight-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-radius: 26px;
  border: 1px solid rgba(31, 143, 221, 0.3);
  background: linear-gradient(125deg, #eaf5ff 0%, #f5fbff 45%, #fff1e6 100%);
  padding: 1.5rem;
  box-shadow: var(--shadow-soft);
}

.highlight-panel p {
  color: var(--muted);
  margin-bottom: 0;
}

.role-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.role-card ul {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.timeline-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.timeline-card code {
  padding: 0.08rem 0.34rem;
  border-radius: 6px;
  background: rgba(31, 143, 221, 0.1);
  color: var(--primary-strong);
}

.exercise-toolbar {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1rem;
}

.filter-group {
  display: flex;
  gap: 0.55rem;
  flex-wrap: wrap;
}

.filter-btn {
  border: 1px solid var(--border);
  background: #fff;
  color: var(--muted);
  border-radius: 999px;
  padding: 0.52rem 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: 0.2s ease;
}

.filter-btn:hover {
  border-color: rgba(31, 143, 221, 0.4);
  color: var(--text);
}

.filter-btn.active {
  color: #fff;
  border-color: transparent;
  background: linear-gradient(120deg, var(--primary), var(--primary-strong));
}

.search-inline {
  display: grid;
  gap: 0.4rem;
}

.search-inline span {
  font-weight: 700;
  font-size: 0.88rem;
}

.search-inline input {
  width: 280px;
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.67rem 0.75rem;
  font: inherit;
}

.exercise-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 0.95rem;
}

.exercise-card {
  background: linear-gradient(160deg, #ffffff 0%, #f8fcff 100%);
}

.exercise-card h3 {
  font-size: 1.17rem;
}

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

.card-meta {
  display: flex;
  justify-content: space-between;
  gap: 0.55rem;
  color: #2d4357;
  font-size: 0.88rem;
  font-weight: 700;
  margin-top: 0.7rem;
}

.exercise-card.is-hidden {
  display: none;
}

.empty-state {
  margin-top: 1rem;
  color: var(--muted);
  font-weight: 700;
}

.contact-cards {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.contact-card h3 {
  color: var(--primary-strong);
}

.contact-card p {
  margin: 0;
  color: var(--muted);
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
}

.contact-form {
  display: grid;
  gap: 0.8rem;
  margin-top: 1rem;
}

.contact-form label {
  display: grid;
  gap: 0.38rem;
  font-weight: 700;
  font-size: 0.94rem;
}

.contact-form input,
.contact-form select,
.contact-form textarea {
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 0.66rem 0.74rem;
  font: inherit;
  color: var(--text);
  background: #fff;
}

.contact-form textarea {
  resize: vertical;
}

.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus,
.search-inline input:focus {
  outline: none;
  border-color: rgba(31, 143, 221, 0.58);
  box-shadow: 0 0 0 4px rgba(31, 143, 221, 0.14);
}

.form-status {
  min-height: 1.2rem;
  margin: 0.2rem 0 0;
  font-weight: 700;
}

.form-status.success {
  color: var(--success);
}

.form-status.error {
  color: #d04141;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: 14px;
  margin-bottom: 0.7rem;
  background: var(--surface-2);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: 0.84rem 0.9rem;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
  position: relative;
}

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0.9rem;
  top: 0.84rem;
  color: var(--primary-strong);
  font-weight: 800;
}

.faq-item.open .faq-question::after {
  content: "−";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.28s ease;
}

.faq-answer p {
  padding: 0 0.9rem 0.85rem;
  margin: 0;
  color: var(--muted);
}

.site-footer {
  margin-top: 3.5rem;
  border-top: 1px solid rgba(214, 227, 238, 0.9);
  background: rgba(255, 255, 255, 0.62);
}

.footer-shell {
  min-height: 82px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.65rem 0;
}

.footer-title {
  font-family: "Sora", "Segoe UI", sans-serif;
  font-weight: 700;
  margin: 0;
}

.footer-text {
  color: var(--muted);
  margin: 0.25rem 0 0;
}

.footer-meta {
  text-align: right;
  color: var(--muted);
}

.footer-meta p {
  margin: 0.18rem 0;
}

.dev-sign {
  font-weight: 700;
  color: var(--primary-strong);
}

.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}

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

@media (max-width: 1024px) {
  .hero-section {
    grid-template-columns: 1fr;
  }

  .feature-grid,
  .exercise-grid,
  .role-cards,
  .contact-cards {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline-grid,
  .contact-layout {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  .menu-btn {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.96);
    border-bottom: 1px solid var(--border);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 0.7rem;
    gap: 0.4rem;
  }

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

  .nav-link {
    border-radius: 12px;
  }

  .feature-grid,
  .feature-grid.two-col,
  .feature-grid.three-col,
  .exercise-grid,
  .role-cards,
  .timeline-grid,
  .contact-cards,
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .highlight-panel {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-shell {
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
  }

  .footer-meta {
    text-align: left;
  }
}