/* ============================================================
   SubWang UI — Modern Dark Theme
   ============================================================ */

:root {
  /* Background layers */
  --bg-base: #0e0e10;
  --bg-surface: #161618;
  --bg-card: #1c1c20;
  --bg-elevated: #242428;
  --bg-input: #131316;

  /* Borders */
  --border: #2a2a30;
  --border-hover: #3a3a42;
  --border-active: #5b8def;

  /* Text */
  --text-primary: #e8e8ec;
  --text-secondary: #a8a8b0;
  --text-muted: #6a6a72;

  /* Accent */
  --accent: #5b8def;
  --accent-hover: #7aa1f5;
  --accent-soft: rgba(91, 141, 239, 0.12);

  /* Semantic */
  --success: #4ade80;
  --success-soft: rgba(74, 222, 128, 0.1);
  --warning: #fbbf24;
  --warning-soft: rgba(251, 191, 36, 0.1);
  --danger: #f87171;
  --danger-soft: rgba(248, 113, 113, 0.1);
  --info: #60a5fa;
  --info-soft: rgba(96, 165, 250, 0.1);

  /* Radius */
  --radius-sm: 6px;
  --radius: 10px;
  --radius-lg: 14px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
  --shadow: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur: 0.2s;
}

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

body {
  font-family: -apple-system, "SF Pro Display", "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 14px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a { color: var(--accent); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--accent-hover); text-decoration: none; }

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

.container { max-width: 640px; margin: 0 auto; padding: 0 16px; }

/* ============================================================
   Navbar
   ============================================================ */
.navbar {
  background: rgba(14, 14, 16, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.navbar .inner {
  max-width: 640px;
  margin: 0 auto;
  padding: 10px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}
.navbar .brand {
  color: var(--text-primary);
  font-weight: 800;
  font-size: 19px;
  letter-spacing: -0.5px;
  white-space: nowrap;
}
.navbar .brand:hover { color: var(--accent); }
.navbar .actions {
  display: flex;
  gap: 4px;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
}
.navbar .actions a {
  color: var(--text-secondary);
  font-size: 13px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  transition: all var(--dur) var(--ease);
  white-space: nowrap;
}
.navbar .actions a:hover {
  color: var(--text-primary);
  background: var(--bg-elevated);
}
.navbar .user-chip { color: var(--success); font-size: 13px; }

/* Mobile nav toggle */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  padding: 6px 10px;
  cursor: pointer;
  font-size: 16px;
  line-height: 1;
}

@media (max-width: 600px) {
  .nav-toggle { display: block; }
  .navbar .actions {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border);
    padding: 8px 16px 14px;
    gap: 2px;
    box-shadow: var(--shadow);
  }
  .navbar .actions.open { display: flex; }
  .navbar .actions a {
    padding: 10px 12px;
    border-radius: var(--radius-sm);
  }
}

/* ============================================================
   Cards
   ============================================================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  margin: 16px 0;
  box-shadow: var(--shadow-sm);
}
.card h1 {
  color: var(--text-primary);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.3px;
}
.card h3 {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 600;
}

/* ============================================================
   Forms
   ============================================================ */
.form-group { margin-bottom: 16px; }
.form-group label {
  display: block;
  margin-bottom: 6px;
  color: var(--text-secondary);
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.3px;
}
.form-group input[type=text],
.form-group input[type=email],
.form-group input[type=password],
.form-group input[type=number],
.form-group input[type=file],
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-primary);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-family: inherit;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); }
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.form-group input[type=checkbox] { width: auto; margin-right: 6px; }
.form-group input[type=checkbox] + label { display: inline; }
.form-group textarea { min-height: 88px; resize: vertical; line-height: 1.6; }

.form-actions {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
  flex-wrap: wrap;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--text-primary);
  color: var(--bg-base);
  border: none;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--dur) var(--ease);
  line-height: 1.4;
}
.btn:hover { opacity: 0.88; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn.btn-block { display: flex; width: 100%; }
.btn.btn-outline {
  background: transparent;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}
.btn.btn-outline:hover {
  background: var(--bg-elevated);
  border-color: var(--border-hover);
  color: var(--text-primary);
}
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }
.btn-sm { padding: 6px 14px; font-size: 12px; }

/* ============================================================
   Alerts
   ============================================================ */
.alert {
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
  font-size: 13px;
  line-height: 1.6;
}
.alert-error { background: var(--danger-soft); color: var(--danger); border: 1px solid rgba(248, 113, 113, 0.25); }
.alert-success { background: var(--success-soft); color: var(--success); border: 1px solid rgba(74, 222, 128, 0.25); }
.alert-info { background: var(--info-soft); color: var(--info); border: 1px solid rgba(96, 165, 250, 0.25); }

.hint { color: var(--text-muted); font-size: 12px; margin-top: 5px; line-height: 1.5; }
code {
  background: var(--bg-elevated);
  padding: 1px 6px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--accent-hover);
}

/* ============================================================
   Profile
   ============================================================ */
.profile-header { display: flex; gap: 16px; align-items: center; margin: 20px 0; }
.profile-header .avatar {
  width: 80px; height: 80px; border-radius: 50%; background: var(--bg-elevated);
  overflow: hidden; flex-shrink: 0; border: 3px solid var(--success);
}
.profile-header .avatar img { width: 100%; height: 100%; object-fit: cover; }
.profile-header .name { color: var(--text-primary); font-size: 18px; font-weight: 600; }
.profile-header .uid { color: var(--text-muted); font-size: 12px; }

.vip-badge {
  display: inline-block;
  background: linear-gradient(135deg, #fbbf24, #f59e0b);
  color: #1a1a1b; font-size: 11px; font-weight: 700;
  padding: 2px 7px; border-radius: 4px; margin-left: 6px;
}
.verified-badge { display: inline-block; color: var(--accent); font-size: 12px; margin-left: 6px; }

.profile-bio { margin: 12px 0; color: var(--text-primary); }
.profile-meta { display: flex; gap: 16px; flex-wrap: wrap; color: var(--text-muted); font-size: 12px; margin: 12px 0; }
.profile-meta span b { color: var(--text-primary); }

/* ============================================================
   Grid (九宫格)
   ============================================================ */
.grid-9 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 4px;
  margin: 10px 0;
}
.grid-9 .cell {
  aspect-ratio: 1;
  background: var(--bg-base);
  border-radius: var(--radius-sm);
  overflow: hidden;
}
.grid-9 .cell img {
  width: 100%; height: 100%; object-fit: cover; cursor: pointer;
  transition: transform var(--dur) var(--ease);
}
.grid-9 .cell img:hover { transform: scale(1.06); }

/* ============================================================
   Post Card
   ============================================================ */
.post-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin: 10px 0;
  transition: border-color var(--dur) var(--ease);
}
.post-card:hover { border-color: var(--border-hover); }
.post-card .author { display: flex; align-items: center; gap: 8px; margin-bottom: 10px; }
.post-card .author .avatar-sm {
  width: 30px; height: 30px; border-radius: 50%; background: var(--bg-elevated);
  overflow: hidden; border: 1px solid var(--border);
}
.post-card .author .avatar-sm img { width: 100%; height: 100%; object-fit: cover; }
.post-card .author .name { color: var(--text-primary); font-weight: 600; font-size: 13px; }
.post-card .author .name:hover { color: var(--accent); }
.post-card .author .time { color: var(--text-muted); font-size: 11px; margin-left: auto; }
.post-card .content { color: var(--text-primary); margin: 8px 0; white-space: pre-wrap; word-break: break-word; line-height: 1.7; }
.post-card .price-tag {
  display: inline-block;
  background: var(--danger-soft);
  color: var(--danger);
  font-size: 12px; font-weight: 600;
  padding: 3px 10px; border-radius: var(--radius-full); margin-top: 6px;
  border: 1px solid rgba(248, 113, 113, 0.2);
}

/* ============================================================
   Empty state
   ============================================================ */
.empty { text-align: center; color: var(--text-muted); padding: 48px 0; font-size: 14px; }

/* ============================================================
   Footer
   ============================================================ */
.footer {
  text-align: center;
  color: var(--text-muted);
  font-size: 12px;
  padding: 32px 0 24px;
}

/* ============================================================
   Utilities
   ============================================================ */
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.text-center { text-align: center; }
.flex { display: flex; }
.gap-8 { gap: 8px; }
.items-center { align-items: center; }

/* ============================================================
   Scrollbar
   ============================================================ */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-base); }
::-webkit-scrollbar-thumb { background: var(--border-hover); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* Selection */
::selection { background: var(--accent-soft); color: var(--text-primary); }