:root {
  --bg: #f4efe8;
  --surface: #fffdf9;
  --surface-alt: #ece1d3;
  --text: #1f1d1b;
  --muted: #5f5a54;
  --primary: #b24a2d;
  --primary-dark: #8f3921;
  --stroke: #d7c8b3;
  --radius-lg: 22px;
  --radius-md: 14px;
  --shadow: 0 18px 40px rgba(53, 35, 17, 0.12);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Sora", sans-serif;
  background: radial-gradient(circle at 10% 20%, #f9f4ec, #f4efe8 45%, #eadfcf 100%);
  color: var(--text);
  line-height: 1.6;
  position: relative;
  overflow-x: hidden;
}

body::before,
body::after {
  content: "";
  position: fixed;
  inset: auto;
  z-index: -1;
  pointer-events: none;
  filter: blur(1px);
}

body::before {
  top: -80px;
  right: -70px;
  width: 360px;
  height: 360px;
  border-radius: 999px;
  background:
    radial-gradient(circle at 26% 28%, rgba(255, 255, 255, 0.5), rgba(255, 255, 255, 0) 28%),
    radial-gradient(circle at 58% 58%, rgba(206, 44, 34, 0.2), rgba(206, 44, 34, 0) 68%),
    radial-gradient(circle at 50% 50%, rgba(189, 45, 36, 0.28), rgba(189, 45, 36, 0.04));
}

body::after {
  bottom: -120px;
  left: -90px;
  width: 420px;
  height: 420px;
  border-radius: 999px;
  background:
    radial-gradient(ellipse at 62% 20%, rgba(73, 132, 61, 0.2), rgba(73, 132, 61, 0) 38%),
    radial-gradient(circle at 44% 62%, rgba(214, 72, 53, 0.17), rgba(214, 72, 53, 0) 70%),
    radial-gradient(circle at 50% 50%, rgba(178, 74, 45, 0.18), rgba(178, 74, 45, 0));
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 5vw;
  background: rgba(255, 253, 249, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(183, 145, 98, 0.22);
}

.logo {
  text-decoration: none;
  font-family: "Urbanist", sans-serif;
  font-weight: 700;
  letter-spacing: 0.03em;
  font-size: 1.2rem;
  color: var(--text);
}

.main-nav {
  display: flex;
  gap: 1rem;
  align-items: center;
}

.main-nav a {
  text-decoration: none;
  color: var(--text);
  font-weight: 600;
  padding: 0.4rem 0.7rem;
  border-radius: 999px;
  transition: 0.2s ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  background: #f0e4d5;
  color: #29190f;
}

.main-nav a.active {
  background: #e8d6c1;
  color: #2b1a10;
}

.menu-toggle {
  display: none;
  border: 1px solid var(--stroke);
  border-radius: 10px;
  background: var(--surface);
  padding: 0.35rem 0.6rem;
  font-size: 1.1rem;
}

main {
  width: min(1120px, 92vw);
  margin: 0 auto;
}

.hero {
  min-height: min(88vh, 760px);
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 2rem;
  align-items: center;
  padding: 3.5rem 0 2.5rem;
}

.eyebrow {
  margin: 0;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 800;
}

.hero h1 {
  margin: 0.6rem 0 1rem;
  font-family: "Urbanist", sans-serif;
  font-size: clamp(2rem, 4.5vw, 3.7rem);
  line-height: 1.08;
}

.intro {
  color: var(--muted);
  max-width: 60ch;
}

.hero-actions {
  margin-top: 1.6rem;
  display: flex;
  gap: 0.9rem;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  text-decoration: none;
  font-weight: 700;
  border-radius: 999px;
  padding: 0.75rem 1.2rem;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

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

.btn-primary {
  background: linear-gradient(120deg, var(--primary), #cc6848);
  color: #fff;
  box-shadow: 0 10px 24px rgba(167, 79, 50, 0.35);
}

.btn-primary:hover {
  background: linear-gradient(120deg, var(--primary-dark), var(--primary));
}

.btn-ghost {
  border: 1px solid var(--stroke);
  color: var(--text);
  background: var(--surface);
}

.hero-visual {
  min-height: 420px;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  background: linear-gradient(to top, rgba(13, 10, 7, 0.35), rgba(13, 10, 7, 0.05)),
    url("https://images.unsplash.com/photo-1592924357228-91a4daadcfea?auto=format&fit=crop&w=1400&q=80") center / cover;
  animation: rise-in 0.8s ease-out;
}

.section {
  padding: 4.5rem 0;
}

.page-hero {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(169, 128, 74, 0.18);
  background: linear-gradient(145deg, rgba(255, 252, 246, 0.96), rgba(240, 228, 209, 0.9));
  box-shadow: 0 14px 34px rgba(69, 42, 18, 0.1);
  padding: 2.2rem;
}

.page-hero::before {
  content: "";
  position: absolute;
  top: -34px;
  right: -34px;
  width: 150px;
  height: 150px;
  border-radius: 999px;
  border: 3px solid rgba(255, 255, 255, 0.62);
  background: url("https://images.unsplash.com/photo-1561136594-7f68413baa99?auto=format&fit=crop&w=500&q=80") center / cover;
  box-shadow: 0 10px 20px rgba(80, 44, 24, 0.24);
  pointer-events: none;
}

.page-hero::after {
  content: "";
  position: absolute;
  bottom: -34px;
  left: -34px;
  width: 130px;
  height: 130px;
  border-radius: 999px;
  border: 3px solid rgba(255, 255, 255, 0.62);
  background: url("https://images.unsplash.com/photo-1546470427-e26264be0b0d?auto=format&fit=crop&w=500&q=80") center / cover;
  box-shadow: 0 10px 20px rgba(80, 44, 24, 0.24);
  pointer-events: none;
}

.section.alt {
  background: linear-gradient(145deg, rgba(245, 237, 225, 0.75), rgba(236, 225, 211, 0.75));
  border: 1px solid rgba(169, 128, 74, 0.16);
  border-radius: var(--radius-lg);
  padding: 2.2rem;
}

.section-title-wrap h2 {
  margin: 0.45rem 0 0.2rem;
  font-family: "Urbanist", sans-serif;
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  letter-spacing: 0.01em;
}

.section-text {
  color: var(--muted);
  max-width: 75ch;
  margin-top: 0.8rem;
  font-size: 1.02rem;
}

.timeline-visual-wrap {
  margin-top: 1.35rem;
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  background: linear-gradient(165deg, #fffdf9, #f6eee1);
  box-shadow: 0 10px 24px rgba(61, 42, 21, 0.12);
  padding: 1rem;
  overflow-x: auto;
}

.timeline-figure {
  margin: 0;
  min-width: 760px;
}

.timeline-figure img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 10px;
  border: 1px solid rgba(169, 128, 74, 0.3);
  background: #fff;
}

.timeline-figure figcaption {
  margin-top: 0.6rem;
  color: #5e4a37;
  font-size: 0.92rem;
  font-weight: 600;
}

.cards {
  margin-top: 1.3rem;
  display: grid;
  gap: 1rem;
}

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

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

.card {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 1.1rem;
  box-shadow: 0 10px 18px rgba(61, 42, 21, 0.08);
}

.card h3 {
  margin-top: 0.1rem;
}

.milestone-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.7rem;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.2rem 0.55rem;
  border-radius: 999px;
  font-size: 0.73rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  font-weight: 800;
  white-space: nowrap;
}

.status-completed {
  background: #d9f1de;
  color: #1f6a2d;
  border: 1px solid #96cf9f;
}

.status-pending {
  background: #fff1d9;
  color: #8a4f05;
  border: 1px solid #e4bf84;
}

.purchase-grid {
  margin-top: 1.1rem;
}

.purchase-card {
  min-height: 132px;
}

.purchase-card h3 {
  margin-bottom: 0.45rem;
}

.purchase-card p {
  margin: 0;
  color: #2e2015;
  font-weight: 600;
}

.purchase-card-cost {
  background: linear-gradient(140deg, #fff8e7, #ffe8b7);
  border-color: #efce85;
}

.purchase-card-installation {
  background: linear-gradient(140deg, #e8f8ef, #cbeed8);
  border-color: #9fd0b5;
}

.purchase-card-service {
  background: linear-gradient(140deg, #eaf3ff, #d4e5ff);
  border-color: #a9c2ee;
}

.purchase-card-renewal {
  background: linear-gradient(140deg, #fff0ea, #ffd8ca);
  border-color: #eab29d;
}

.purchase-card-upgrade {
  background: linear-gradient(140deg, #f3ecff, #e2d6ff);
  border-color: #beace6;
}

.purchase-contact {
  margin-top: 1rem;
  background: linear-gradient(145deg, #fff7e8, #f8e5bf);
  border-color: #d9b97a;
}

.inline-link {
  color: var(--primary-dark);
  font-weight: 700;
  text-decoration: none;
}

.inline-link:hover,
.inline-link:focus-visible {
  text-decoration: underline;
}

.domain-top-grid {
  margin-bottom: 1rem;
}

.domain-grid {
  margin-top: 1rem;
}

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.topic-card .inline-link {
  margin-top: auto;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.tag-list span {
  border: 1px solid #d7c8b3;
  background: #f7eee2;
  color: #2d2016;
  border-radius: 999px;
  padding: 0.25rem 0.65rem;
  font-size: 0.86rem;
  font-weight: 600;
}

.bullet-list {
  margin: 0;
  padding-left: 1.1rem;
  color: var(--muted);
}

.bullet-list li + li {
  margin-top: 0.32rem;
}

.expand-card {
  display: grid;
  gap: 0.7rem;
}

.expand-card details {
  border: 1px solid var(--stroke);
  border-radius: 10px;
  background: #fff9f1;
  padding: 0.7rem 0.85rem;
}

.expand-card summary {
  cursor: pointer;
  font-weight: 700;
  color: #2e2015;
}

.expand-card details p {
  margin: 0.65rem 0 0;
  color: var(--muted);
}

.members-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.team-chart {
  margin-top: 1.3rem;
}

.chart-row {
  display: grid;
  gap: 1rem;
}

.chart-row-guides {
  max-width: 860px;
  margin: 0 auto;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.chart-row-students {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.chart-divider {
  width: min(900px, 100%);
  height: 1px;
  margin: 1.1rem auto;
  background: linear-gradient(to right, rgba(183, 145, 98, 0), rgba(183, 145, 98, 0.75), rgba(183, 145, 98, 0));
}

.member-card {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.member-card > img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.member-card h3,
.member-card p {
  margin: 0;
  padding: 0.2rem 0.9rem;
}

.member-card h3 {
  padding-top: 0.8rem;
}

.member-card p {
  color: var(--muted);
  padding-bottom: 1rem;
}

.member-card a {
  display: inline-block;
  padding: 0 0.9rem 1rem;
  color: var(--primary-dark);
  font-weight: 700;
  text-decoration: none;
  word-break: break-word;
}

.member-card a:hover,
.member-card a:focus-visible {
  text-decoration: underline;
}

.avatar {
  width: 68px;
  height: 68px;
  margin: 1rem auto 0.4rem;
  border-radius: 999px;
  overflow: hidden;
  border: 2px solid rgba(255, 255, 255, 0.88);
  background: #fff;
  box-shadow: 0 10px 18px rgba(109, 50, 29, 0.28);
}

.avatar img {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: cover;
  object-position: center 24%;
}

.avatar-guide img {
  transform: scale(1.2);
}

.avatar-student img {
  transform: scale(1.33);
}

.publication-list {
  margin: 1rem 0 0;
  padding: 0;
  list-style: none;
  display: grid;
  gap: 1rem;
}

.publication-list li {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 1rem;
}

.publication-list a {
  color: var(--primary-dark);
  font-weight: 700;
}

.contact-box {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 1rem;
  max-width: 650px;
}

.contact-box strong {
  color: #2f2014;
}

.doc-category-grid {
  margin-top: 1.35rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.doc-link-card {
  text-decoration: none;
  color: var(--text);
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 1.15rem;
  min-height: 96px;
  display: flex;
  align-items: center;
  box-shadow: 0 10px 18px rgba(61, 42, 21, 0.08);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.doc-link-card:hover,
.doc-link-card:focus-visible {
  transform: translateY(-2px);
  border-color: #c9a57b;
  box-shadow: 0 12px 22px rgba(61, 42, 21, 0.14);
}

.doc-link-title {
  font-family: "Urbanist", sans-serif;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.doc-detail-grid {
  margin-top: 1.35rem;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.doc-detail-card {
  background: var(--surface);
  border: 1px solid var(--stroke);
  border-radius: var(--radius-md);
  padding: 1rem;
  box-shadow: 0 10px 18px rgba(61, 42, 21, 0.08);
}

.doc-detail-link {
  text-decoration: none;
  color: var(--text);
  display: block;
  position: relative;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.doc-detail-link:hover,
.doc-detail-link:focus-visible {
  transform: translateY(-2px);
  border-color: #c9a57b;
  box-shadow: 0 12px 22px rgba(61, 42, 21, 0.14);
}

.doc-no {
  display: inline-block;
  margin-bottom: 0.4rem;
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary);
  font-weight: 800;
}

.doc-name {
  margin: 0;
  font-family: "Urbanist", sans-serif;
  font-size: 1.06rem;
}

.doc-meta {
  margin: 0.3rem 0 0;
  color: var(--muted);
  font-size: 0.93rem;
}

.doc-arrow {
  position: absolute;
  right: 1rem;
  top: 50%;
  transform: translateY(-50%);
  font-weight: 700;
  color: var(--primary-dark);
}

.doc-page-back {
  margin-top: 1.2rem;
}

.doc-page-back a {
  text-decoration: none;
}

.site-footer {
  margin-top: 3rem;
  padding: 1.2rem 5vw 2.4rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.site-footer a {
  color: var(--primary-dark);
  text-decoration: none;
  font-weight: 700;
}

@keyframes rise-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}

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

@media (max-width: 980px) {
  .hero {
    grid-template-columns: 1fr;
    padding-top: 2.1rem;
  }

  .hero-visual {
    min-height: 300px;
  }

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

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

@media (max-width: 760px) {
  .menu-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: calc(100% + 0.4rem);
    right: 5vw;
    left: 5vw;
    flex-direction: column;
    align-items: stretch;
    padding: 0.6rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--stroke);
    background: var(--surface);
    box-shadow: var(--shadow);
    display: none;
  }

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

  .main-nav a {
    border-radius: 10px;
  }

  .section {
    padding: 3.4rem 0;
  }

  .section.alt {
    padding: 1.2rem;
  }

  .page-hero {
    padding: 1.2rem;
  }

  .timeline-visual-wrap {
    padding: 0.7rem;
  }

  .timeline-figure {
    min-width: 680px;
  }

  .two-col,
  .three-col,
  .members-grid,
  .chart-row-guides,
  .chart-row-students,
  .doc-category-grid,
  .doc-detail-grid {
    grid-template-columns: 1fr;
  }

  .page-hero::before,
  .page-hero::after {
    width: 96px;
    height: 96px;
  }

  body::before,
  body::after {
    opacity: 0.55;
    transform: scale(0.85);
  }
}