/* Geo Hub — Atlas / Teal (MindCanvas · 교육학 연수 · GeoMax) */

:root {
  color-scheme: light;

  --bg-page: #f3faf8;
  --bg-card: #ffffff;
  --bg-inset: #ecf7f3;
  --bg-scrim: rgba(15, 51, 44, 0.42);

  --text-primary: #16332c;
  --text-secondary: rgba(22, 51, 44, 0.62);
  --text-tertiary: rgba(22, 51, 44, 0.36);

  --border: #d5e8e1;
  --border-strong: #b4d4c9;
  --separator: rgba(13, 68, 58, 0.14);

  --accent: #0d9488;
  --accent-hover: #0f766e;
  --accent-soft: rgba(13, 148, 136, 0.12);
  --accent-sky: #0284c7;

  --cat-vibe: #0d9488;
  --cat-vibe-soft: rgba(13, 148, 136, 0.12);
  --cat-school: #0284c7;
  --cat-school-soft: rgba(2, 132, 199, 0.12);
  --cat-homeroom: #c2410c;
  --cat-homeroom-soft: rgba(194, 65, 12, 0.12);
  --cat-subject: #15803d;
  --cat-subject-soft: rgba(21, 128, 61, 0.12);

  --radius-card: 18px;
  --radius-xl: 22px;
  --radius-pill: 999px;
  --radius-btn: 12px;
  --radius-sheet: 16px;

  --shadow-sm: 0 1px 2px rgba(13, 68, 58, 0.05);
  --shadow-card: 0 8px 24px rgba(13, 68, 58, 0.08);
  --shadow-raised: 0 10px 28px rgba(13, 68, 58, 0.1);
  --shadow-modal: 0 20px 50px rgba(13, 68, 58, 0.18);

  --ease-spring: cubic-bezier(0.34, 1.2, 0.64, 1);
  --ease-out: cubic-bezier(0.32, 0.72, 0, 1);
  --dur-fast: 0.18s;
  --dur-base: 0.32s;

  --font: "Noto Sans KR", system-ui, sans-serif;
  --font-display: "Outfit", "Noto Sans KR", system-ui, sans-serif;

  --touch: 44px;
  --max-width: 1400px;
  --gutter: 16px;
}

@media (min-width: 900px) {
  :root {
    --gutter: 24px;
  }
}

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

html {
  color-scheme: light;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.5;
  color: var(--text-primary);
  background-color: var(--bg-page);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

/* ── Background (radial mint / sky) ── */

.page-bg {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    radial-gradient(720px 420px at 12% -8%, rgba(13, 148, 136, 0.16), transparent 55%),
    radial-gradient(640px 380px at 92% 4%, rgba(2, 132, 199, 0.1), transparent 50%),
    radial-gradient(560px 360px at 50% 100%, rgba(21, 128, 61, 0.06), transparent 55%),
    var(--bg-page);
}

@media (min-width: 900px) and (hover: hover) and (pointer: fine) {
  .page-bg {
    background:
      radial-gradient(1000px 520px at 12% -8%, rgba(13, 148, 136, 0.18), transparent 55%),
      radial-gradient(900px 480px at 92% 4%, rgba(2, 132, 199, 0.12), transparent 50%),
      radial-gradient(700px 420px at 50% 100%, rgba(21, 128, 61, 0.07), transparent 55%),
      var(--bg-page);
    background-attachment: fixed;
  }
}

a {
  color: inherit;
}

button {
  font-family: inherit;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

button:focus-visible,
a:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

/* ── Shell ── */

.app-shell {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--gutter) calc(32px + env(safe-area-inset-bottom));
  padding-left: max(var(--gutter), env(safe-area-inset-left));
  padding-right: max(var(--gutter), env(safe-area-inset-right));
}

/* ── Top bar ── */

.site-top {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 10px 0 8px;
  background: color-mix(in srgb, var(--bg-page) 78%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.site-copyright {
  text-align: center;
  font-size: 11px;
  color: var(--text-tertiary);
  line-height: 1.5;
}

.site-copyright a {
  color: var(--text-secondary);
  text-decoration: none;
}

.site-copyright a:hover {
  color: var(--accent);
  text-decoration: underline;
}

/* ── Hero ── */

.hub-canvas {
  padding: 28px 0 24px;
}

.hub-hero {
  text-align: center;
  padding: 4px 8px;
  animation: heroIn 0.55s var(--ease-out) both;
}

@keyframes heroIn {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  margin-bottom: 14px;
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: var(--radius-pill);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 9vw, 3.4rem);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.05;
  margin-bottom: 12px;
  background: linear-gradient(118deg, #0f766e 0%, #0284c7 52%, #0d9488 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-desc {
  font-size: 15px;
  color: var(--text-secondary);
  max-width: 28rem;
  margin: 0 auto;
  line-height: 1.55;
  word-break: keep-all;
}

/* ── Category sections ── */

.hub-sections {
  display: grid;
  grid-template-columns: 1fr;
  gap: 28px;
  padding-bottom: 8px;
}

@media (min-width: 768px) {
  .hub-sections {
    grid-template-columns: repeat(2, 1fr);
    gap: 0;
    align-items: start;
  }
}

@media (min-width: 1100px) {
  .hub-sections {
    grid-template-columns: repeat(4, 1fr);
  }
}

.hub-section {
  --section-accent: var(--accent);
  --section-accent-soft: var(--accent-soft);
  display: flex;
  flex-direction: column;
  min-width: 0;
}

.hub-section[data-category="vibe"] {
  --section-accent: var(--cat-vibe);
  --section-accent-soft: var(--cat-vibe-soft);
}

.hub-section[data-category="school"] {
  --section-accent: var(--cat-school);
  --section-accent-soft: var(--cat-school-soft);
}

.hub-section[data-category="homeroom"] {
  --section-accent: var(--cat-homeroom);
  --section-accent-soft: var(--cat-homeroom-soft);
}

.hub-section[data-category="subject"] {
  --section-accent: var(--cat-subject);
  --section-accent-soft: var(--cat-subject-soft);
}

@media (min-width: 768px) {
  .hub-section {
    padding: 0 12px;
    border-right: 1px solid color-mix(in srgb, var(--section-accent) 12%, var(--separator));
  }

  .hub-section:first-child {
    padding-left: 0;
  }

  .hub-section:last-child {
    padding-right: 0;
    border-right: none;
  }
}

@media (max-width: 767px) {
  .hub-section {
    padding-bottom: 8px;
    border-bottom: 1px solid var(--separator);
  }

  .hub-section:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid color-mix(in srgb, var(--section-accent) 28%, transparent);
  flex-shrink: 0;
}

.section-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--section-accent);
  line-height: 1.3;
}

.section-title::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 14px;
  margin-right: 8px;
  vertical-align: -2px;
  background: var(--section-accent);
  border-radius: 2px;
}

.section-count {
  flex-shrink: 0;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--section-accent);
  padding: 3px 8px;
  background: var(--section-accent-soft);
  border-radius: var(--radius-pill);
}

.card-row {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.section-empty {
  width: 100%;
  padding: 20px 12px;
  text-align: center;
  font-size: 14px;
  color: var(--text-tertiary);
  background: rgba(255, 255, 255, 0.6);
  border: 1px dashed var(--border);
  border-radius: var(--radius-card);
}

/* ── Project cards ── */

.project-card {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 6px;
  width: 100%;
  flex-shrink: 0;
  min-height: 124px;
  padding: 16px 14px 14px;
  text-align: left;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition:
    transform 0.22s ease,
    box-shadow 0.22s ease,
    border-color 0.22s ease;
}

.project-card::after {
  content: "";
  position: absolute;
  inset: auto -20% -40% auto;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: var(--card-accent, var(--accent));
  opacity: 0.12;
  pointer-events: none;
  transition: transform 0.3s ease;
}

.project-card:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--card-accent, var(--accent)) 45%, var(--border));
  box-shadow: var(--shadow-raised);
}

.project-card:hover::after {
  transform: scale(1.15);
}

.project-card:active {
  transform: scale(0.985);
}

.project-card__emoji {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  margin-bottom: 6px;
  font-size: 1.35rem;
  line-height: 1;
  background: color-mix(in srgb, var(--card-accent, var(--accent)) 12%, transparent);
  border-radius: 14px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--border) 80%, transparent);
  z-index: 1;
}

.project-card__title {
  font-family: var(--font-display);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.3;
  z-index: 1;
}

.project-card__desc {
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.45;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  z-index: 1;
}

.project-card__status {
  margin-top: auto;
  font-family: var(--font-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--card-accent, var(--accent));
  padding: 3px 8px;
  background: color-mix(in srgb, var(--card-accent, var(--accent)) 12%, transparent);
  border-radius: var(--radius-pill);
  z-index: 1;
}

.hub-sections.is-animating .project-card {
  animation: cardIn 0.45s var(--ease-out) both;
  animation-delay: calc(var(--i, 0) * 0.04s);
}

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

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-secondary);
  font-size: 15px;
}

/* ── Modal / sheet ── */

.modal-backdrop {
  position: fixed;
  inset: 0;
  z-index: 100;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  background: var(--bg-scrim);
  opacity: 0;
  visibility: hidden;
  transition: opacity var(--dur-base), visibility var(--dur-base);
}

.modal-backdrop.is-open {
  opacity: 1;
  visibility: visible;
}

.modal-sheet {
  width: 100%;
  max-width: 520px;
  max-height: 85vh;
  max-height: 85dvh;
  padding: 12px 20px calc(20px + env(safe-area-inset-bottom));
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-modal);
  transform: translateY(100%);
  transition: transform 0.35s var(--ease-spring);
  overflow-y: auto;
}

@media (min-width: 600px) {
  .modal-backdrop {
    align-items: center;
    padding: 24px;
  }

  .modal-sheet {
    border-radius: var(--radius-xl);
    max-height: 80vh;
    transform: translateY(24px) scale(0.96);
    opacity: 0;
    transition:
      transform 0.35s var(--ease-spring),
      opacity 0.28s var(--ease-out);
  }

  .modal-backdrop.is-open .modal-sheet {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.modal-backdrop.is-open .modal-sheet {
  transform: translateY(0);
}

.modal-handle {
  width: 36px;
  height: 4px;
  margin: 0 auto 16px;
  background: var(--border-strong);
  border-radius: var(--radius-pill);
}

@media (min-width: 600px) {
  .modal-handle {
    display: none;
  }
}

.modal-header {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 16px;
}

.modal-emoji {
  flex-shrink: 0;
  width: 52px;
  height: 52px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  background: var(--accent-soft);
  border-radius: 16px;
  box-shadow: inset 0 0 0 1px color-mix(in srgb, var(--border) 80%, transparent);
}

.modal-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.modal-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  word-break: keep-all;
}

.modal-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--separator);
}

.modal-tag {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-pill);
  background: var(--bg-inset);
  color: var(--text-secondary);
}

.modal-tag--category {
  color: var(--tag-color, var(--accent));
  background: color-mix(in srgb, var(--tag-color, var(--accent)) 12%, transparent);
}

.modal-actions {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.modal-actions__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.modal-actions__grid--single {
  grid-template-columns: 1fr;
}

.modal-actions__grid .btn {
  width: 100%;
  padding: 0 12px;
  font-size: 14px;
  line-height: 1.25;
  text-align: center;
}

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--touch);
  padding: 0 20px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-btn);
  text-decoration: none;
  transition:
    opacity var(--dur-fast),
    transform var(--dur-fast) var(--ease-spring),
    background var(--dur-fast),
    border-color var(--dur-fast);
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

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

.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
}

.btn-secondary {
  color: var(--text-primary);
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover:not(:disabled) {
  background: var(--bg-inset);
  border-color: var(--border-strong);
}

.btn:disabled,
.btn.is-disabled {
  opacity: 0.45;
  cursor: not-allowed;
  pointer-events: none;
}

.modal-close {
  width: 100%;
  min-height: var(--touch);
  margin-top: 12px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-secondary);
  background: transparent;
  border-radius: var(--radius-btn);
}

.modal-close:hover {
  background: var(--bg-inset);
  color: var(--text-primary);
}

.modal-github-notice {
  margin: 0;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  background: rgba(194, 65, 12, 0.1);
  border-radius: var(--radius-btn);
  line-height: 1.5;
}

.modal-notice {
  margin-top: 12px;
  padding: 10px 12px;
  font-size: 13px;
  color: var(--text-secondary);
  text-align: center;
  background: rgba(194, 65, 12, 0.1);
  border-radius: var(--radius-btn);
  line-height: 1.5;
}

/* ── Footer ── */

.site-footer {
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid var(--separator);
  text-align: center;
  font-size: 12px;
  color: var(--text-tertiary);
  line-height: 1.6;
}

.site-footer strong {
  font-family: var(--font-display);
  color: var(--text-secondary);
  font-weight: 600;
}

/* ── Content modal ── */

.content-backdrop {
  align-items: flex-end;
  justify-content: center;
  padding: 0;
  background: var(--bg-scrim);
}

.content-sheet {
  display: flex;
  flex-direction: column;
  width: 100%;
  max-width: var(--max-width);
  height: min(88vh, 880px);
  height: min(88dvh, 880px);
  max-height: 88vh;
  max-height: 88dvh;
  margin: 0;
  padding: 0;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  box-shadow: var(--shadow-modal);
  transform: translateY(100%);
  opacity: 1;
  transition: transform 0.35s var(--ease-spring);
  overflow: hidden;
}

.content-sheet > .modal-handle {
  margin-top: 10px;
  margin-bottom: 0;
  flex-shrink: 0;
}

.content-backdrop.is-open .content-sheet {
  transform: translateY(0);
  opacity: 1;
}

@media (min-width: 600px) {
  .content-backdrop {
    align-items: center;
    padding: 24px;
  }

  .content-sheet {
    border-radius: var(--radius-xl);
    width: min(1100px, calc(100vw - 48px));
    height: min(82vh, 820px);
    height: min(82dvh, 820px);
    max-height: 82vh;
    max-height: 82dvh;
    transform: translateY(24px) scale(0.96);
    opacity: 0;
    transition:
      transform 0.35s var(--ease-spring),
      opacity 0.28s var(--ease-out);
  }

  .content-backdrop.is-open .content-sheet {
    transform: translateY(0) scale(1);
    opacity: 1;
  }

  .content-sheet > .modal-handle {
    display: none;
  }
}

.content-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-shrink: 0;
  padding: 14px 18px 12px;
  background: var(--bg-card);
  border-bottom: 1px solid var(--separator);
  color: var(--text-primary);
}

.content-header__text {
  min-width: 0;
}

.content-title {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-primary);
  margin: 0;
}

.content-desc {
  margin: 2px 0 0;
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.content-close {
  flex-shrink: 0;
  min-height: var(--touch);
  padding: 0 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  background: var(--bg-inset);
  border-radius: var(--radius-btn);
  border: 1px solid var(--border);
}

.content-close:hover {
  background: color-mix(in srgb, var(--accent) 10%, var(--bg-inset));
  color: var(--accent-hover);
  border-color: var(--border-strong);
}

.content-body {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-inset);
}

.slides-frame-wrap {
  flex: 1;
  min-height: 0;
  width: 100%;
  background: var(--bg-inset);
}

.slides-frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: var(--bg-inset);
}

.gallery-viewer {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 14px;
  padding-bottom: max(14px, env(safe-area-inset-bottom));
  background: var(--bg-inset);
}

.gallery-stage {
  min-width: 0;
  min-height: 0;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
}

.gallery-image {
  max-width: 100%;
  max-height: calc(100% - 36px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: 12px;
  background: #fff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
}

.gallery-counter {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  font-variant-numeric: tabular-nums;
}

.gallery-nav {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  font-size: 20px;
  font-weight: 500;
  color: var(--accent);
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  box-shadow: var(--shadow-sm);
}

.gallery-nav:hover {
  background: var(--accent-soft);
  border-color: color-mix(in srgb, var(--accent) 30%, var(--border));
}

@media (max-width: 599px) {
  .gallery-viewer {
    position: relative;
    grid-template-columns: 1fr;
    grid-template-rows: 1fr auto;
  }

  .gallery-nav {
    display: none;
  }
}