/* ============================================================
   Debate Arena — styles.css
   Uber-inspired minimalism. High contrast. Dark/light mode.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&family=IBM+Plex+Mono:wght@400;500&display=swap');

:root {
  --bg:           #ffffff;
  --surface:      #f7f7f7;
  --surface-2:    #efefef;
  --surface-card: #f7f7f7;
  --border:       #e0e0e0;
  --border-strong:#000000;
  --text:         #000000;
  --text-muted:   #6b6b6b;
  --text-faint:   #9e9e9e;
  --accent:       #000000;
  --accent-fg:    #ffffff;
  --side-a:       #000000;
  --side-b:       #6b6b6b;
  --judge:        #000000;
  --danger:       #cc0000;
  --primary:      #000000;
  --secondary:    #6b6b6b;
  --font:         'Inter', system-ui, sans-serif;
  --mono:         'IBM Plex Mono', monospace;
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-mono:    'IBM Plex Mono', monospace;
  --radius:       0px;
  --transition:   0.15s ease;
}

[data-theme="dark"] {
  --bg:           #0f0f0f;
  --surface:      #1a1a1a;
  --surface-2:    #242424;
  --surface-card: #1a1a1a;
  --border:       #2e2e2e;
  --border-strong:#ffffff;
  --text:         #ffffff;
  --text-muted:   #a0a0a0;
  --text-faint:   #5a5a5a;
  --accent:       #ffffff;
  --accent-fg:    #000000;
  --side-a:       #ffffff;
  --side-b:       #a0a0a0;
  --judge:        #ffffff;
  --primary:      #ffffff;
  --secondary:    #a0a0a0;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0;
  transition: background var(--transition), color var(--transition);
}

.container {
  width: 100%;
  max-width: 720px;
  padding: 0 1.5rem 4rem;
}

.site-header {
  width: 100%;
  max-width: 720px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 2rem 1.5rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 2.5rem;
}

.site-header h1 {
  font-family: var(--font);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text);
}

.site-header p {
  font-family: var(--mono);
  font-size: 0.72rem;
  color: var(--text-faint);
  margin-top: 0.1rem;
  letter-spacing: 0.04em;
}

#theme-toggle {
  width: 2.25rem;
  height: 2.25rem;
  border-radius: 50%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: background var(--transition);
}
#theme-toggle:hover { background: var(--surface-2); }

.card {
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 2rem;
  margin-bottom: 1rem;
}

#provider-tabs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--border);
  margin-bottom: 2rem;
  overflow: hidden;
}

.ptab {
  padding: 0.85rem 1rem;
  text-align: center;
  cursor: pointer;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: var(--bg);
  color: var(--text-muted);
  border: none;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}

.ptab:first-child { border-right: 1px solid var(--border); }

.ptab.active-hc,
.ptab.active-npc {
  color: var(--text);
  border-bottom: 2px solid var(--text);
  background: var(--bg);
}

.ptab:not(.active-hc):not(.active-npc):hover {
  color: var(--text);
  background: var(--surface);
}

.hc-badge, .npc-badge {
  display: inline-block;
  font-size: 0.65rem;
  font-family: var(--mono);
  padding: 0.1rem 0.4rem;
  border: 1px solid var(--border);
  color: var(--text-muted);
  margin-left: 0.4rem;
  vertical-align: middle;
  letter-spacing: 0.06em;
  background: transparent;
}

#hc-key-row, #npc-key-row { margin-bottom: 1.25rem; }

.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
@media (max-width: 600px) { .grid-2 { grid-template-columns: 1fr; } }

.input-group {
  display: flex;
  flex-direction: column;
  margin-bottom: 1.25rem;
}

label {
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

input, textarea, select {
  width: 100%;
  background: var(--bg);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 0.75rem 0.875rem;
  font-family: var(--font);
  font-size: 0.9rem;
  border-radius: 0;
  outline: none;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
}

input:focus, textarea:focus, select:focus { border-color: var(--text); }

select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%236b6b6b' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
}

textarea { resize: vertical; min-height: 90px; }

.provider-hint {
  font-size: 0.72rem;
  color: var(--text-faint);
  font-family: var(--mono);
  margin-top: 0.4rem;
  letter-spacing: 0.02em;
}

.button-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

button {
  background: var(--accent);
  color: var(--accent-fg);
  font-family: var(--font);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  border: 1px solid var(--accent);
  padding: 0.85rem 1.25rem;
  cursor: pointer;
  border-radius: 0;
  width: 100%;
  transition: opacity var(--transition);
}
button:hover { opacity: 0.85; }
button:active { opacity: 0.7; }

button.secondary-btn {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
button.secondary-btn:hover { background: var(--surface); opacity: 1; }

.arena-panel { display: none; }

.arena-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  padding-bottom: 1.25rem;
  border-bottom: 1px solid var(--border);
  margin-bottom: 1.5rem;
}

.arena-header label {
  font-size: 0.68rem;
  color: var(--text-faint);
  margin-bottom: 0.25rem;
}

.arena-header h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
}

#room-display-id {
  font-family: var(--mono);
  font-size: 0.78rem;
  letter-spacing: 0.06em;
  margin: 0;
  color: var(--text);
}

.chat-log {
  height: 460px;
  overflow-y: auto;
  border: 1px solid var(--border);
  background: var(--surface);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.bubble {
  max-width: 82%;
  padding: 1rem 1.125rem;
  line-height: 1.65;
  font-size: 0.9rem;
  animation: fadeUp 0.2s ease-out;
  border-radius: 0;
}

@keyframes fadeIn { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeUp { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.bubble .meta {
  font-family: var(--mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 0.45rem;
}

.bubble.side-a {
  background: var(--bg);
  border: 1px solid var(--border);
  border-left: 3px solid var(--side-a);
  align-self: flex-start;
}
.bubble.side-a .meta { color: var(--side-a); }

.bubble.side-b {
  background: var(--bg);
  border: 1px solid var(--border);
  border-right: 3px solid var(--side-b);
  align-self: flex-end;
  text-align: right;
}
.bubble.side-b .meta { color: var(--side-b); }

.bubble.judge {
  background: var(--surface-2);
  border: 1px solid var(--border-strong);
  align-self: center;
  max-width: 96%;
  width: 100%;
  text-align: center;
}
.bubble.judge .meta { color: var(--judge); text-align: center; }

.status-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 1rem;
  padding: 0.75rem;
  border: 1px solid var(--border);
  background: var(--surface);
}

#status-console {
  font-family: var(--mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.04em;
  text-align: center;
}

.tagline {
  text-align: center;
  margin-top: 2rem;
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--text-faint);
  text-transform: uppercase;
}

::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); }