/* Rocky — Apple design system */
:root {
  --bg: #f5f5f7;
  --surface: #ffffff;
  --surface-2: #f2f2f7;
  --text: #1d1d1f;
  --text-2: #6e6e73;
  --text-3: #86868b;
  --accent: #0071e3;
  --accent-2: #0077ed;
  --danger: #ff3b30;
  --success: #34c759;
  --warn: #ff9500;
  --border: rgba(0, 0, 0, 0.08);
  --shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --r-sm: 10px;
  --r: 16px;
  --r-lg: 22px;
  --nav-h: 52px;
  --font: -apple-system, BlinkMacSystemFont, "SF Pro SC", "PingFang SC", "Hiragino Sans GB", "Segoe UI", "Microsoft YaHei", sans-serif;
  --spring: cubic-bezier(0.32, 0.72, 0, 1);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #000000;
    --surface: #1c1c1e;
    --surface-2: #2c2c2e;
    --text: #f5f5f7;
    --text-2: #a1a1a6;
    --text-3: #86868b;
    --accent: #0a84ff;
    --accent-2: #409cff;
    --border: rgba(255, 255, 255, 0.12);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.5);
    --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.6);
    color-scheme: dark;
  }
}

@media (prefers-reduced-transparency: reduce) {
  :root { --nav-bg: rgba(245, 245, 247, 0.98); }
  @media (prefers-color-scheme: dark) { :root { --nav-bg: #000; } }
}

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

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

body {
  font-family: var(--font);
  font-size: 17px;
  line-height: 1.5;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
button { font-family: inherit; }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ---------- Nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  background: rgba(245, 245, 247, 0.72);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border);
}
@media (prefers-color-scheme: dark) {
  .nav { background: rgba(0, 0, 0, 0.72); }
}
.nav-inner {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 0 22px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.logo {
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--text);
  text-decoration: none;
}
.logo:hover { text-decoration: none; }
.nav-links { display: flex; gap: 6px; align-items: center; }
.nav-link {
  color: var(--text-2);
  font-size: 14px;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 999px;
  transition: background 0.2s var(--spring), color 0.2s var(--spring);
}
.nav-link:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-link.active { color: var(--accent); }

/* ---------- Layout ---------- */
.page {
  width: min(1100px, 100%);
  margin: 0 auto;
  padding: 40px 22px 80px;
  flex: 1;
}
.narrow { width: min(640px, 100%); }

/* ---------- Hero ---------- */
.hero { text-align: center; padding: 40px 0 32px; }
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.03em;
}
.hero p {
  color: var(--text-2);
  font-size: 19px;
  margin-top: 12px;
}
.avatar {
  width: 104px;
  height: 104px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 20px;
  box-shadow: var(--shadow);
  cursor: pointer;
  transition: transform 0.3s var(--spring);
}
.avatar:hover { transform: scale(1.04); }

/* ---------- Cards ---------- */
.card {
  background: var(--surface);
  border-radius: var(--r);
  padding: 24px;
  box-shadow: var(--shadow);
  margin-bottom: 16px;
}
.card h2, .card h3 { letter-spacing: -0.02em; margin-bottom: 8px; }
.card p { color: var(--text-2); }
.card-title { font-size: 20px; font-weight: 650; }
.stack { display: grid; gap: 16px; }

/* ---------- Section headings ---------- */
.section-title {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 40px 0 16px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border: none;
  border-radius: 980px;
  padding: 10px 22px;
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  color: var(--accent);
  background: transparent;
  transition: transform 0.15s var(--spring), background 0.2s var(--spring), opacity 0.2s;
  text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn:hover { text-decoration: none; }
.btn:active { transform: scale(0.97); }
.btn:disabled { opacity: 0.5; cursor: default; transform: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-2); }
.btn-secondary { background: var(--surface-2); color: var(--text); }
.btn-secondary:hover { background: rgba(128, 128, 128, 0.2); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { filter: brightness(0.94); }
.btn-block { width: 100%; }
.btn-sm { padding: 6px 14px; font-size: 14px; }

/* ---------- Forms ---------- */
.field { margin-bottom: 16px; }
.label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text);
}
.input, .textarea, select.input {
  width: 100%;
  padding: 12px 14px;
  font-size: 17px;
  font-family: inherit;
  color: var(--text);
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: 12px;
  transition: border-color 0.2s, background 0.2s;
  -webkit-appearance: none;
  appearance: none;
}
.input:focus, .textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: var(--surface);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 20%, transparent);
}
.input::placeholder, .textarea::placeholder { color: var(--text-3); }
.textarea { resize: vertical; min-height: 110px; line-height: 1.5; }
textarea.code { font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 14px; }

/* ---------- Segmented control ---------- */
.seg {
  display: inline-flex;
  background: var(--surface-2);
  border-radius: 10px;
  padding: 2px;
  gap: 2px;
}
.seg button {
  border: none;
  background: transparent;
  padding: 7px 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-2);
  cursor: pointer;
  transition: background 0.2s var(--spring), color 0.2s;
}
.seg button.active {
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.12);
}

/* ---------- Lists (iOS grouped) ---------- */
.list {
  background: var(--surface);
  border-radius: var(--r);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
}
.row:last-child { border-bottom: none; }
.row-main { min-width: 0; }
.row-title { font-weight: 600; font-size: 16px; }
.row-sub { color: var(--text-2); font-size: 14px; }
.row-actions { display: flex; gap: 8px; flex-shrink: 0; }

/* ---------- Badges ---------- */
.badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 600;
}
.badge-green { background: rgba(52, 199, 89, 0.15); color: var(--success); }
.badge-orange { background: rgba(255, 149, 0, 0.15); color: var(--warn); }
.badge-red { background: rgba(255, 59, 48, 0.15); color: var(--danger); }
.badge-gray { background: var(--surface-2); color: var(--text-2); }

/* ---------- Members grid ---------- */
.members {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
  gap: 18px;
  justify-items: center;
}
.member { text-align: center; }
.member img {
  width: 84px;
  height: 84px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 8px;
}
.member span { font-size: 14px; color: var(--text-2); }

/* ---------- Resource cards ---------- */
.resource-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 16px;
}
.resource-card {
  background: var(--surface);
  border-radius: var(--r);
  padding: 20px;
  box-shadow: var(--shadow);
  transition: transform 0.3s var(--spring), box-shadow 0.3s;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.resource-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.resource-card h3 { font-size: 18px; letter-spacing: -0.02em; }
.resource-card p { color: var(--text-2); font-size: 15px; flex: 1; }

/* ---------- Album grid ---------- */
.album-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 18px;
}
.album-card {
  background: var(--surface);
  border-radius: var(--r);
  padding: 22px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.album-year { color: var(--text-3); font-size: 14px; }
.album-card h3 { font-size: 20px; letter-spacing: -0.02em; }
.album-card p { color: var(--text-2); font-size: 14px; }
.album-card .meta { font-size: 12px; color: var(--text-3); word-break: break-all; }

/* ---------- Toast ---------- */
.toast {
  position: fixed;
  left: 50%;
  bottom: 28px;
  transform: translateX(-50%) translateY(20px);
  background: var(--text);
  color: var(--bg);
  padding: 12px 22px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s var(--spring), transform 0.25s var(--spring);
  z-index: 100;
  max-width: 90vw;
  text-align: center;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ---------- Dialog ---------- */
.modal {
  position: fixed;
  inset: 0;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background: rgba(0, 0, 0, 0.4);
  -webkit-backdrop-filter: blur(4px);
  backdrop-filter: blur(4px);
  z-index: 90;
}
.modal.show { display: flex; }
.modal-card {
  width: min(420px, 100%);
  background: var(--surface);
  border-radius: var(--r-lg);
  padding: 26px;
  box-shadow: var(--shadow-lg);
}
.modal-card h3 { margin-bottom: 10px; letter-spacing: -0.02em; }
.modal-actions { display: flex; gap: 10px; margin-top: 18px; }
.modal-actions .btn { flex: 1; }

/* ---------- Log / console ---------- */
.log {
  background: var(--surface);
  border-radius: var(--r);
  padding: 16px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  line-height: 1.6;
  max-height: 240px;
  overflow: auto;
  white-space: pre-wrap;
  word-break: break-all;
}
.log .success { color: var(--success); }
.log .error { color: var(--danger); }
.log .info { color: var(--accent); }
.log .warning { color: var(--warn); }

/* ---------- Misc ---------- */
.muted { color: var(--text-2); }
.small { font-size: 14px; }
.center { text-align: center; }
.mt { margin-top: 24px; }
.hidden { display: none; }
.file-label {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 22px;
  border: 1.5px dashed var(--border);
  border-radius: var(--r);
  cursor: pointer;
  color: var(--text-2);
  transition: border-color 0.2s, background 0.2s;
}
.file-label:hover { border-color: var(--accent); background: color-mix(in srgb, var(--accent) 6%, transparent); }
.file-label input { display: none; }

.footer {
  border-top: 1px solid var(--border);
  padding: 28px 22px;
  text-align: center;
  color: var(--text-3);
  font-size: 13px;
}

/* ---------- Fade in ---------- */
.fade-in { opacity: 0; transform: translateY(14px); transition: opacity 0.6s var(--spring), transform 0.6s var(--spring); }
.fade-in.visible { opacity: 1; transform: none; }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
  .fade-in { opacity: 1; transform: none; transition: none; }
  .btn, .resource-card, .avatar, .nav-link { transition: none; }
  .resource-card:hover { transform: none; }
  .avatar:hover { transform: none; }
}

@media (max-width: 640px) {
  body { font-size: 16px; }
  .page { padding: 28px 16px 64px; }
  .card { padding: 18px; }
  .row { flex-wrap: wrap; }
  .nav-inner { padding: 0 16px; }
}