/* ========================================
   CSS Variables
   ======================================== */
:root {
  --bg: #0a0a0a;
  --bg-secondary: #111;
  --surface: #161616;
  --surface-hover: #1c1c1c;
  --border: #262626;
  --text: #e5e5e5;
  --text-muted: #737373;
  --text-dim: #525252;
  --accent: #3b82f6;
  --accent-hover: #2563eb;
  --radius: 10px;
  --radius-sm: 6px;
  color-scheme: dark;
}

[data-theme="light"] {
  --bg: #f5f5f5;
  --bg-secondary: #fff;
  --surface: #fff;
  --surface-hover: #f0f0f0;
  --border: #e5e5e5;
  --text: #171717;
  --text-muted: #737373;
  --text-dim: #a3a3a3;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  color-scheme: light;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  min-height: 100dvh;
  -webkit-font-smoothing: antialiased;
  transition: background 0.2s, color 0.2s;
}

/* ========================================
   Header
   ======================================== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 1rem 1.25rem;
  transition: background 0.2s;
}

.header-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header h1 span { color: var(--accent); }

.header-actions {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.btn-icon {
  width: 34px;
  height: 34px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  transition: all 0.15s;
}

.btn-icon:hover {
  border-color: var(--accent);
  color: var(--text);
}

/* ========================================
   Filters
   ======================================== */
.filters {
  display: flex;
  gap: 0.4rem;
  overflow-x: auto;
  scrollbar-width: none;
  -ms-overflow-style: none;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 2px;
}

.filters::-webkit-scrollbar { display: none; }

.filter-btn {
  padding: 0.3rem 0.65rem;
  border-radius: 20px;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text-muted);
  cursor: pointer;
  font-size: 0.75rem;
  font-weight: 500;
  transition: all 0.15s;
  white-space: nowrap;
  flex-shrink: 0;
}

.filter-btn:hover {
  border-color: var(--accent);
  color: var(--text);
}

.filter-btn.active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.filter-btn .count {
  font-size: 0.65rem;
  opacity: 0.7;
  margin-left: 0.2rem;
}

/* ========================================
   Container & Content
   ======================================== */
.container {
  max-width: 800px;
  margin: 0 auto;
  padding: 0.75rem 1rem;
}

.stats {
  font-size: 0.75rem;
  color: var(--text-dim);
  padding: 0.5rem 0;
}

/* ========================================
   Post List
   ======================================== */
.post-list {
  display: flex;
  flex-direction: column;
}

.post {
  display: grid;
  grid-template-columns: 72px auto 1fr;
  gap: 0.6rem;
  padding: 0.7rem 0.5rem;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: inherit;
  align-items: center;
  transition: background 0.12s;
  border-bottom: 1px solid var(--border);
  cursor: pointer;
}

.post:last-child { border-bottom: none; }

.post:hover, .post:active {
  background: var(--surface-hover);
}

.post-date {
  font-size: 0.7rem;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.post-source {
  font-size: 0.6rem;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.3px;
  text-align: center;
  white-space: nowrap;
}

.post-title {
  font-size: 0.85rem;
  font-weight: 500;
  line-height: 1.35;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

/* Source colors */
.source-claude     { background: #f59e0b15; color: #f59e0b; }
.source-codex      { background: #10b98115; color: #10b981; }
.source-deepseek   { background: #818cf815; color: #818cf8; }
.source-gemma      { background: #60a5fa15; color: #60a5fa; }
.source-kimi       { background: #f472b615; color: #f472b6; }
.source-qwen       { background: #a78bfa15; color: #a78bfa; }
.source-openclaw   { background: #f8717115; color: #f87171; }
.source-ollama     { background: #fb923c15; color: #fb923c; }
.source-cursor     { background: #22d3ee15; color: #22d3ee; }
.source-perplexity { background: #2dd4bf15; color: #2dd4bf; }
.source-xai        { background: #d4d4d415; color: #d4d4d4; }

/* ========================================
   Empty State
   ======================================== */
.empty-state {
  text-align: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
  font-size: 0.9rem;
}

/* ========================================
   Footer
   ======================================== */
.footer {
  text-align: center;
  padding: 1.5rem 1rem;
  color: var(--text-dim);
  font-size: 0.7rem;
  border-top: 1px solid var(--border);
  margin-top: 1rem;
  line-height: 1.6;
}

/* ========================================
   Install Banner
   ======================================== */
.install-banner {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.75rem 1rem;
  margin: 0.5rem 1rem;
  align-items: center;
  gap: 0.75rem;
}

.install-banner.show { display: flex; }

.install-banner-text {
  flex: 1;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.install-banner-text strong {
  color: var(--text);
  display: block;
  font-size: 0.85rem;
  margin-bottom: 0.15rem;
}

.btn-install {
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-sm);
  border: none;
  background: var(--accent);
  color: #fff;
  font-size: 0.75rem;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.15s;
}

.btn-install:hover { background: var(--accent-hover); }

.btn-dismiss {
  background: none;
  border: none;
  color: var(--text-dim);
  cursor: pointer;
  font-size: 1.1rem;
  padding: 0.25rem;
}

/* ========================================
   Responsive
   ======================================== */

/* Tablet */
@media (min-width: 640px) {
  .header { padding: 1.25rem 2rem; }
  .container { padding: 1rem 2rem; }
  .post {
    grid-template-columns: 80px auto 1fr;
    gap: 0.75rem;
    padding: 0.75rem 0.75rem;
  }
  .post-title { font-size: 0.9rem; }
  .post-date { font-size: 0.75rem; }
}

/* Desktop */
@media (min-width: 1024px) {
  .header { padding: 1.25rem 2.5rem; }
  .container { padding: 1rem 2.5rem; }
}

/* Small phones */
@media (max-width: 380px) {
  .header { padding: 0.75rem; }
  .container { padding: 0.5rem 0.75rem; }
  .post {
    grid-template-columns: 64px auto 1fr;
    gap: 0.4rem;
    padding: 0.6rem 0.25rem;
  }
  .post-title { font-size: 0.8rem; }
  .filter-btn { font-size: 0.7rem; padding: 0.25rem 0.5rem; }
}

/* Safe area for notched phones */
@supports (padding-top: env(safe-area-inset-top)) {
  .header {
    padding-top: calc(1rem + env(safe-area-inset-top));
    padding-left: calc(1.25rem + env(safe-area-inset-left));
    padding-right: calc(1.25rem + env(safe-area-inset-right));
  }
}

/* Touch feedback */
@media (hover: none) {
  .post:active { background: var(--surface-hover); }
  .filter-btn:active { opacity: 0.8; }
}