/* ─── Reset & Base ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d0d14;
  --bg2:       #13131f;
  --bg3:       #1a1a2e;
  --border:    #2a2a44;
  --accent:    #6c63ff;
  --accent2:   #00d4ff;
  --success:   #22c55e;
  --error:     #ef4444;
  --warn:      #f59e0b;
  --text:      #e2e2f0;
  --text-muted:#8080a0;
  --radius:    12px;
  --shadow:    0 4px 24px rgba(0,0,0,.5);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* ─── Header ──────────────────────────────────────────────────────────────── */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.logo {
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--accent2);
  letter-spacing: .03em;
}

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

nav { display: flex; gap: 8px; }

nav a {
  color: var(--text-muted);
  text-decoration: none;
  padding: 6px 16px;
  border-radius: 20px;
  font-size: .88rem;
  font-weight: 500;
  transition: all .2s;
}

nav a:hover, nav a.active {
  background: var(--accent);
  color: #fff;
}

/* ─── Layout ──────────────────────────────────────────────────────────────── */
main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 60px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

/* ─── Hero ────────────────────────────────────────────────────────────────── */
.hero {
  text-align: center;
  padding: 40px 20px 24px;
}

.hero h1 {
  font-size: 2.2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p { color: var(--text-muted); margin-top: 8px; font-size: 1rem; }

/* ─── Card ────────────────────────────────────────────────────────────────── */
.card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.card h2 {
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 20px;
}

/* ─── Download Grid ───────────────────────────────────────────────────────── */
.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 16px;
}

.platform-card {
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
  transition: border-color .2s, transform .2s;
  cursor: pointer;
  text-decoration: none;
  color: var(--text);
  display: block;
}

.platform-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.platform-card .icon { font-size: 2.5rem; margin-bottom: 10px; display: block; }
.platform-card .name { font-weight: 700; font-size: 1rem; }
.platform-card .meta { font-size: .78rem; color: var(--text-muted); margin-top: 4px; }
.platform-card .dl-btn {
  display: inline-block;
  margin-top: 14px;
  padding: 7px 18px;
  background: var(--accent);
  color: #fff;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity .2s;
}
.platform-card .dl-btn:hover { opacity: .85; }
.platform-card.unavailable { opacity: .4; pointer-events: none; }

/* ─── Build Panel ─────────────────────────────────────────────────────────── */
.build-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

button {
  padding: 8px 18px;
  border: 1px solid var(--border);
  background: var(--bg3);
  color: var(--text);
  border-radius: 8px;
  cursor: pointer;
  font-size: .88rem;
  font-weight: 500;
  transition: all .2s;
}

button:hover { border-color: var(--accent); color: var(--accent); }

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

button.primary:hover { opacity: .85; }

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: 20px;
  font-size: .82rem;
  font-weight: 600;
  margin-bottom: 14px;
}

.status-badge.idle    { background: rgba(128,128,160,.15); color: var(--text-muted); }
.status-badge.building{ background: rgba(245,158,11,.15);  color: var(--warn); }
.status-badge.success { background: rgba(34,197,94,.15);   color: var(--success); }
.status-badge.error   { background: rgba(239,68,68,.15);   color: var(--error); }

.build-log {
  background: #080810;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  font-family: 'Cascadia Code', 'Fira Code', monospace;
  font-size: .78rem;
  color: #a0ffa0;
  height: 220px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-break: break-all;
}

/* ─── Hot Reload Badge ────────────────────────────────────────────────────── */
.hot-reload-badge {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--success);
  color: #fff;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(34,197,94,.4);
  opacity: 0;
  transform: translateY(10px);
  transition: all .3s;
  pointer-events: none;
}

.hot-reload-badge.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Chat ────────────────────────────────────────────────────────────────── */
.chat-container {
  display: flex;
  flex-direction: column;
  height: calc(100vh - 130px);
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius) var(--radius) 0 0;
}

.message {
  max-width: 75%;
  padding: 10px 16px;
  border-radius: 16px;
  font-size: .93rem;
  line-height: 1.55;
  word-break: break-word;
}

.message.user {
  align-self: flex-end;
  background: var(--accent);
  color: #fff;
  border-bottom-right-radius: 4px;
}

.message.assistant {
  align-self: flex-start;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-bottom-left-radius: 4px;
  white-space: pre-wrap;
}

.message .model-tag {
  font-size: .7rem;
  color: var(--text-muted);
  margin-top: 4px;
  text-align: right;
}

.message.thinking {
  align-self: flex-start;
  background: var(--bg3);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-style: italic;
}

.chat-input-row {
  display: flex;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-top: none;
  border-radius: 0 0 var(--radius) var(--radius);
  padding: 10px;
  gap: 8px;
}

.chat-input-row textarea {
  flex: 1;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 14px;
  font-size: .93rem;
  font-family: inherit;
  resize: none;
  height: 46px;
  min-height: 46px;
  max-height: 140px;
  transition: border-color .2s;
  overflow-y: auto;
}

.chat-input-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.chat-input-row button {
  background: var(--accent);
  border: none;
  color: #fff;
  border-radius: 10px;
  padding: 10px 20px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .2s;
}

.chat-input-row button:hover { opacity: .85; }
.chat-input-row button:disabled { opacity: .4; cursor: not-allowed; }

.chat-header {
  padding: 12px 16px;
  background: var(--bg3);
  border: 1px solid var(--border);
  border-bottom: none;
  border-radius: var(--radius) var(--radius) 0 0;
  display: flex;
  align-items: center;
  gap: 10px;
}

.chat-header .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.chat-header .dot.connected { background: var(--success); }
.chat-header .title { font-weight: 600; font-size: .95rem; }
.chat-header .model-info { font-size: .78rem; color: var(--text-muted); margin-left: auto; }

/* ─── Scrollbar ───────────────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ─── Responsive ──────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  .hero h1 { font-size: 1.5rem; }
  .platform-grid { grid-template-columns: 1fr 1fr; }
  .build-actions { flex-direction: column; }
  header { padding: 12px 16px; }
  main { padding: 20px 12px 40px; }
}