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

:root {
  /* Backgrounds */
  --bg:         #06060f;
  --surface:    rgba(255,255,255,0.03);
  --surface2:   rgba(255,255,255,0.055);

  /* Borders */
  --border:     rgba(0,212,255,0.1);
  --border-hi:  rgba(0,212,255,0.32);

  /* Text */
  --text:       #cce8ff;
  --text-muted: #3a6a8c;

  /* Accent colours */
  --cyan:       #00d4ff;
  --purple:     #a855f7;
  --green:      #00ff88;
  --red:        #ff4d6d;
  --orange:     #ff9d3d;

  /* Glows */
  --glow-c:     rgba(0,212,255,0.22);
  --glow-p:     rgba(168,85,247,0.2);
  --glow-g:     rgba(0,255,136,0.18);

  --radius: 8px;
  --font:   'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --mono:   'JetBrains Mono','Fira Code','Courier New',monospace;
}

html, body {
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  font-size: 15px;
  line-height: 1.6;
  overflow: hidden;
}

/* ── Atmospheric depth ── */
body::before {
  content: '';
  position: fixed; inset: 0;
  background:
    radial-gradient(ellipse at 10% 35%, rgba(0,212,255,0.08)  0%, transparent 52%),
    radial-gradient(ellipse at 88% 10%, rgba(168,85,247,0.07) 0%, transparent 48%),
    radial-gradient(ellipse at 55% 90%, rgba(0,255,136,0.04)  0%, transparent 44%);
  pointer-events: none; z-index: 0;
}

/* ── Dot grid ── */
body::after {
  content: '';
  position: fixed; inset: 0;
  background-image: radial-gradient(rgba(0,212,255,0.1) 1px, transparent 1px);
  background-size: 30px 30px;
  pointer-events: none; z-index: 0;
  mask-image: radial-gradient(ellipse at center, black 25%, transparent 75%);
}

/* ══════════════════════════════════════
   LAYOUT
══════════════════════════════════════ */
#app {
  display: flex; flex-direction: column;
  height: 100dvh; max-width: 820px;
  margin: 0 auto; position: relative; z-index: 1;
}

/* ══════════════════════════════════════
   SETUP SCREEN
══════════════════════════════════════ */
#setup-screen {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 200;
  display: flex; align-items: center; justify-content: center;
  padding: 28px 20px;
  overflow: hidden;
}

/* Scan line */
.scan-line {
  position: absolute; left: 0; right: 0;
  height: 180px;
  background: linear-gradient(180deg, transparent, rgba(0,212,255,0.035), transparent);
  animation: scanDown 6s linear infinite;
  pointer-events: none; z-index: 1;
}
@keyframes scanDown { 0% { top: -180px; } 100% { top: 110%; } }

/* HUD corner brackets */
.hud-corner {
  position: fixed;
  width: 22px; height: 22px;
  z-index: 2; pointer-events: none;
}
.hud-tl { top: 16px; left: 16px;  border-top:    1.5px solid var(--cyan); border-left:   1.5px solid var(--cyan); }
.hud-tr { top: 16px; right: 16px; border-top:    1.5px solid var(--cyan); border-right:  1.5px solid var(--cyan); }
.hud-bl { bottom: 16px; left: 16px;  border-bottom: 1.5px solid var(--cyan); border-left:  1.5px solid var(--cyan); }
.hud-br { bottom: 16px; right: 16px; border-bottom: 1.5px solid var(--cyan); border-right: 1.5px solid var(--cyan); }

#setup-inner {
  width: 100%; max-width: 380px;
  position: relative; z-index: 3;
}

/* Common view layout */
#setup-firsttime, #setup-picker, #setup-progress, #setup-error {
  display: flex; flex-direction: column;
  align-items: center; gap: 16px;
  text-align: center; width: 100%;
}

/* ── Logo with rings ── */
.setup-logo {
  width: 72px; height: 72px;
  position: relative;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.setup-logo svg { position: relative; z-index: 2; filter: drop-shadow(0 0 12px rgba(0,212,255,0.45)); }

.logo-ring-1, .logo-ring-2 {
  position: absolute; inset: -12px;
  border-radius: 50%;
  border: 1px solid rgba(0,212,255,0.15);
  animation: ringPulse 3s ease-in-out infinite;
}
.logo-ring-2 {
  inset: -22px;
  border-color: rgba(168,85,247,0.1);
  animation-delay: 0.8s;
  animation-duration: 3.6s;
}
@keyframes ringPulse {
  0%,100% { opacity: 0.6; transform: scale(1); }
  50%      { opacity: 1;   transform: scale(1.04); }
}

/* ── Brand text ── */
.setup-brand { display: flex; flex-direction: column; align-items: center; gap: 4px; }

#setup-firsttime h2, #setup-picker h3, #setup-progress h3, #setup-error h3 {
  font-size: 28px; font-weight: 800;
  letter-spacing: -0.02em;
  font-family: var(--mono);
  background: linear-gradient(90deg, var(--cyan), var(--purple), var(--cyan));
  background-size: 200% auto;
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: shimmer 4s linear infinite;
}
@keyframes shimmer { to { background-position: 200% center; } }

.setup-tagline {
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.2em; text-transform: uppercase;
  color: var(--text-muted);
}

.setup-sub {
  color: var(--text-muted); font-size: 13px;
  max-width: 300px; line-height: 1.75; letter-spacing: 0.01em;
}

/* ── Model card ── */
.setup-model-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  text-align: left; width: 100%;
  position: relative; overflow: hidden;
}
.setup-model-card-glow {
  position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
  opacity: 0.5;
}
.setup-mc-row {
  display: flex; align-items: center;
  justify-content: space-between; margin-bottom: 4px;
}
.setup-mc-label {
  font-size: 10px; font-weight: 700;
  letter-spacing: 0.12em; color: var(--cyan); opacity: 0.6;
}
.setup-mc-tag {
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 3px; padding: 1px 7px;
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.06em; color: var(--cyan);
}
.setup-mc-name {
  font-size: 16px; font-weight: 700;
  font-family: var(--mono); color: var(--text);
  letter-spacing: 0.02em; margin-bottom: 8px;
}
.setup-mc-meta { display: flex; gap: 6px; flex-wrap: wrap; }
.mc-chip {
  font-size: 11px; font-weight: 500;
  border-radius: 3px; padding: 2px 8px;
  letter-spacing: 0.04em;
}
.mc-chip-cyan   { background: rgba(0,212,255,0.08);  border: 1px solid rgba(0,212,255,0.2);  color: var(--cyan);   }
.mc-chip-green  { background: rgba(0,255,136,0.07);  border: 1px solid rgba(0,255,136,0.2);  color: var(--green);  }
.mc-chip-purple { background: rgba(168,85,247,0.08); border: 1px solid rgba(168,85,247,0.2); color: var(--purple); }

/* ── Feature grid ── */
.feat-grid {
  display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; width: 100%;
}
.feat-item {
  display: flex; align-items: center; gap: 6px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 4px; padding: 5px 11px;
  font-size: 11px; font-weight: 500;
  letter-spacing: 0.04em; color: var(--text-muted);
}
.feat-dot {
  width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0;
  box-shadow: 0 0 5px currentColor;
}
.feat-cyan   { background: var(--cyan);   color: var(--cyan);   }
.feat-green  { background: var(--green);  color: var(--green);  }
.feat-purple { background: var(--purple); color: var(--purple); }
.feat-red    { background: var(--red);    color: var(--red);    }

/* ── CTA button ── */
#setup-start-btn, #picker-confirm-btn, #retry-btn {
  position: relative;
  background: transparent;
  color: var(--cyan);
  border: 1px solid var(--border-hi);
  border-radius: var(--radius);
  padding: 13px 24px;
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase;
  cursor: pointer; width: 100%;
  display: flex; align-items: center; justify-content: center; gap: 10px;
  transition: all 0.2s; overflow: hidden;
  font-family: var(--font);
}
#setup-start-btn::before, #picker-confirm-btn::before, #retry-btn::before {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.07), rgba(168,85,247,0.07));
  opacity: 0; transition: opacity 0.2s;
}
#setup-start-btn:hover::before, #picker-confirm-btn:hover::before, #retry-btn:hover::before { opacity: 1; }
#setup-start-btn:hover, #picker-confirm-btn:hover, #retry-btn:hover {
  border-color: var(--cyan);
  box-shadow: 0 0 24px var(--glow-c), inset 0 0 24px rgba(0,212,255,0.04);
}

.setup-note {
  background: rgba(0,212,255,0.03);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 9px 13px;
  font-size: 11px; color: var(--text-muted);
  text-align: left; width: 100%;
  display: flex; gap: 8px; line-height: 1.65; letter-spacing: 0.01em;
}
.setup-note svg { flex-shrink: 0; margin-top: 1px; color: var(--cyan); opacity: 0.5; }
.setup-note strong { color: var(--text); }

.setup-link-btn {
  background: none; border: none;
  color: var(--text-muted); font-size: 12px; cursor: pointer;
  letter-spacing: 0.03em; transition: color 0.15s;
  text-decoration: underline; text-decoration-color: var(--border);
  text-underline-offset: 3px;
}
.setup-link-btn:hover { color: var(--cyan); }

.back-btn {
  background: none; border: none;
  color: var(--text-muted); font-size: 12px; cursor: pointer;
  display: flex; align-items: center; gap: 4px;
  align-self: flex-start; transition: color 0.15s; letter-spacing: 0.02em;
}
.back-btn:hover { color: var(--cyan); }

/* Model list in picker */
.model-list { display: flex; flex-direction: column; gap: 6px; width: 100%; }

.model-item {
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px; cursor: pointer;
  display: flex; align-items: flex-start; gap: 10px;
  text-align: left; transition: all 0.15s;
}
.model-item:hover { border-color: var(--border-hi); box-shadow: 0 0 14px var(--glow-c); }
.model-item.selected { border-color: var(--cyan); background: rgba(0,212,255,0.05); box-shadow: 0 0 16px var(--glow-c); }

.model-item-check {
  width: 18px; height: 18px; border-radius: 50%;
  border: 1px solid var(--border-hi);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; margin-top: 2px; transition: all 0.15s;
}
.model-item.selected .model-item-check { background: var(--cyan); border-color: var(--cyan); box-shadow: 0 0 8px var(--glow-c); }
.model-item-check svg { opacity: 0; transition: opacity 0.15s; }
.model-item.selected .model-item-check svg { opacity: 1; }
.model-item-info { display: flex; flex-direction: column; gap: 3px; min-width: 0; }
.model-item-name { font-size: 13px; font-weight: 600; }
.model-item-tag {
  display: inline-block;
  background: rgba(0,212,255,0.08); color: var(--cyan);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 3px; padding: 1px 7px;
  font-size: 10px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase; width: fit-content;
}
.model-item-desc { font-size: 12px; color: var(--text-muted); }

/* Progress */
.progress-track { width: 100%; }
.progress-track-inner {
  background: rgba(0,212,255,0.05);
  border: 1px solid var(--border);
  border-radius: 100px; height: 4px; overflow: hidden; margin-bottom: 6px;
}
#prog-bar {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  border-radius: 100px; width: 0%; transition: width 0.3s ease;
  box-shadow: 0 0 8px var(--glow-c);
}
.progress-ends {
  display: flex; justify-content: space-between;
  font-size: 11px; letter-spacing: 0.03em;
}
#prog-detail { color: var(--text-muted); max-width: 70%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
#prog-pct { color: var(--cyan); font-weight: 600; font-variant-numeric: tabular-nums; }

.prog-ring-wrap { display: none; } /* hidden, using track only */

.error-icon {
  font-size: 48px; opacity: 0.8;
  filter: drop-shadow(0 0 12px rgba(255,77,109,0.4));
}

.no-webgpu-tips {
  display: flex; flex-direction: column; gap: 8px;
  margin-top: 16px; width: 100%;
}
.no-webgpu-tip {
  display: flex; flex-direction: column; gap: 2px;
  background: var(--surface2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 10px 12px;
  text-align: left;
}
.tip-label {
  font-size: 11px; font-weight: 600; letter-spacing: .04em;
  color: var(--cyan); text-transform: uppercase;
}
.tip-text { font-size: 12px; color: var(--text-muted); line-height: 1.5; }
.tip-text code {
  font-size: 10px; color: var(--text);
  background: rgba(0,212,255,0.07); border-radius: 3px;
  padding: 1px 4px; word-break: break-all;
}

/* ══════════════════════════════════════
   HEADER
══════════════════════════════════════ */
#header {
  align-items: center; justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(6,6,15,0.88);
  backdrop-filter: blur(20px);
  flex-shrink: 0; gap: 10px; position: relative;
}
#header::after {
  content: ''; position: absolute;
  bottom: -1px; left: 8%; right: 8%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
  opacity: 0.35;
}

#header-left { display: flex; align-items: center; gap: 10px; min-width: 0; }

.header-logo {
  width: 32px; height: 32px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.18);
  border-radius: 7px;
  box-shadow: 0 0 10px rgba(0,212,255,0.12);
}

/* Wordmark */
#header h1 {
  font-size: 15px; font-weight: 800;
  letter-spacing: 0.04em;
  font-family: var(--mono);
  white-space: nowrap;
}
.brand-no  { color: var(--cyan);   }
.brand-sep { color: var(--text-muted); }
.brand-www {
  color: var(--purple);
  text-decoration: line-through;
  text-decoration-color: var(--red);
  text-decoration-thickness: 2px;
}

#model-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(0,212,255,0.04);
  border: 1px solid var(--border);
  border-radius: 4px; padding: 4px 10px;
  font-size: 11px; color: var(--text-muted);
  white-space: nowrap; cursor: pointer;
  letter-spacing: 0.04em; font-weight: 500; transition: all 0.15s;
}
#model-badge:hover { border-color: var(--border-hi); color: var(--cyan); box-shadow: 0 0 10px var(--glow-c); }

#model-status-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--text-muted); flex-shrink: 0; }
#model-status-dot.ready  { background: var(--green);  box-shadow: 0 0 6px rgba(0,255,136,0.6); animation: pulse 2.5s ease-in-out infinite; }
#model-status-dot.loading{ background: var(--orange); animation: pulse 0.9s ease-in-out infinite; }
#model-status-dot.error  { background: var(--red); }
@keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.35; } }

#header-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

.icon-btn {
  background: none; border: 1px solid transparent;
  border-radius: 6px; color: var(--text-muted);
  cursor: pointer; padding: 6px 8px;
  display: flex; align-items: center; justify-content: center;
  transition: all 0.15s; line-height: 1;
}
.icon-btn:hover { background: rgba(0,212,255,0.06); color: var(--cyan); border-color: var(--border); box-shadow: 0 0 8px var(--glow-c); }

/* ══════════════════════════════════════
   MESSAGES
══════════════════════════════════════ */
#messages {
  flex: 1; overflow-y: auto;
  padding: 18px 16px 10px;
  scroll-behavior: smooth;
  flex-direction: column; gap: 2px;
}
#messages::-webkit-scrollbar { width: 3px; }
#messages::-webkit-scrollbar-track { background: transparent; }
#messages::-webkit-scrollbar-thumb { background: rgba(0,212,255,0.18); border-radius: 4px; }

.message { display: flex; align-items: flex-end; gap: 8px; margin-bottom: 14px; animation: msgIn 0.22s ease; }
.message.user { flex-direction: row-reverse; }

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

.avatar {
  width: 26px; height: 26px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; align-self: flex-end; margin-bottom: 2px;
  border: 1px solid var(--border);
  overflow: hidden;
}
.avatar.ai {
  background: rgba(0,212,255,0.08);
  border-color: rgba(0,212,255,0.22);
  box-shadow: 0 0 8px rgba(0,212,255,0.18);
}
.avatar.user {
  background: rgba(168,85,247,0.08);
  border-color: rgba(168,85,247,0.22);
}
/* Logo inside AI avatar */
.avatar.ai svg { width: 18px; height: 18px; }

.bubble {
  max-width: min(74%, 560px);
  padding: 10px 14px; border-radius: 10px;
  font-size: 14px; line-height: 1.7; word-break: break-word;
  position: relative;
}
.message.ai .bubble {
  background: rgba(0,212,255,0.03);
  border: 1px solid rgba(0,212,255,0.1);
  border-left: 2px solid rgba(0,212,255,0.3);
  border-bottom-left-radius: 3px;
  backdrop-filter: blur(10px);
}
.message.ai .bubble::before {
  content: '';
  position: absolute; top: 0; left: 10px; right: 10px; height: 1px;
  background: linear-gradient(90deg, transparent, rgba(0,212,255,0.25), transparent);
}
.message.user .bubble {
  background: rgba(168,85,247,0.06);
  border: 1px solid rgba(168,85,247,0.18);
  border-right: 2px solid rgba(168,85,247,0.35);
  border-bottom-right-radius: 3px;
}

/* Bubble typography */
.bubble pre {
  background: rgba(0,0,0,0.45);
  border: 1px solid rgba(0,212,255,0.1);
  border-radius: 6px; padding: 12px;
  overflow-x: auto; margin: 8px 0; font-size: 12px;
}
.bubble code {
  font-family: var(--mono); font-size: 12px;
  background: rgba(0,212,255,0.08); color: var(--cyan);
  padding: 1px 5px; border-radius: 3px;
}
.bubble pre code { background: none; padding: 0; color: #8ecfff; }
.bubble p { margin-bottom: 6px; }
.bubble p:last-child { margin-bottom: 0; }
.bubble ul, .bubble ol { padding-left: 18px; margin: 4px 0; }
.bubble li { margin-bottom: 2px; }
.bubble strong { font-weight: 700; color: var(--cyan); }
.bubble h2,.bubble h3,.bubble h4 { margin: 8px 0 4px; font-size: 12px; color: var(--cyan); letter-spacing: 0.08em; text-transform: uppercase; }

/* Typing dots */
.typing-indicator { display: flex; gap: 5px; align-items: center; padding: 4px 2px; }
.typing-dot {
  width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); opacity: 0.25;
  animation: typingPop 1.2s ease-in-out infinite;
  box-shadow: 0 0 4px var(--glow-c);
}
.typing-dot:nth-child(2) { animation-delay: 0.2s; }
.typing-dot:nth-child(3) { animation-delay: 0.4s; }
@keyframes typingPop {
  0%,80%,100% { opacity:0.2; transform:scale(0.85); }
  40% { opacity:1; transform:scale(1.25); box-shadow:0 0 8px var(--glow-c); }
}

/* ── Empty state ── */
#empty-state {
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  height: 100%; gap: 12px; text-align: center; padding: 24px;
  pointer-events: none;
}
.empty-logo {
  opacity: 0.35;
  filter: grayscale(0.3);
  margin-bottom: 4px;
}
.empty-title {
  font-size: 20px; font-weight: 800;
  font-family: var(--mono); letter-spacing: 0.04em;
  background: linear-gradient(90deg, var(--cyan), var(--purple));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
  opacity: 0.6;
}
.empty-sub {
  font-size: 12px; color: var(--text-muted);
  opacity: 0.65; max-width: 240px; letter-spacing: 0.01em;
}

.suggestions {
  display: flex; flex-wrap: wrap; gap: 7px;
  justify-content: center; max-width: 380px;
  pointer-events: all; margin-top: 6px;
}
.suggestion-chip {
  background: var(--surface);
  border-radius: 4px; padding: 6px 12px;
  font-size: 12px; cursor: pointer;
  letter-spacing: 0.02em; transition: all 0.15s;
  border: 1px solid;
}
.chip-c { border-color: rgba(0,212,255,0.15);  color: rgba(0,212,255,0.6);  }
.chip-p { border-color: rgba(168,85,247,0.15); color: rgba(168,85,247,0.65); }
.chip-g { border-color: rgba(0,255,136,0.13);  color: rgba(0,255,136,0.6);  }
.chip-c:hover { background: rgba(0,212,255,0.07);  border-color: rgba(0,212,255,0.35);  color: var(--cyan);   box-shadow: 0 0 10px var(--glow-c); }
.chip-p:hover { background: rgba(168,85,247,0.07); border-color: rgba(168,85,247,0.35); color: var(--purple); box-shadow: 0 0 10px var(--glow-p); }
.chip-g:hover { background: rgba(0,255,136,0.06);  border-color: rgba(0,255,136,0.3);   color: var(--green);  box-shadow: 0 0 10px var(--glow-g); }

/* ══════════════════════════════════════
   INPUT
══════════════════════════════════════ */
#input-area {
  padding: 10px 14px 14px;
  border-top: 1px solid var(--border);
  background: rgba(6,6,15,0.82);
  backdrop-filter: blur(20px); flex-shrink: 0;
}

#input-wrap {
  display: flex; align-items: flex-end; gap: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 8px 8px 14px;
  transition: border-color 0.2s, box-shadow 0.2s;
}
#input-wrap:focus-within {
  border-color: rgba(0,212,255,0.38);
  box-shadow: 0 0 0 1px rgba(0,212,255,0.08), 0 0 20px rgba(0,212,255,0.09);
}

#user-input {
  flex: 1; background: none; border: none; color: var(--text);
  font-size: 14px; font-family: var(--font); line-height: 1.5;
  resize: none; outline: none; max-height: 140px; min-height: 22px;
  overflow-y: auto; letter-spacing: 0.01em;
}
#user-input::placeholder { color: var(--text-muted); }
#user-input::-webkit-scrollbar { display: none; }

#send-btn {
  background: rgba(0,212,255,0.09);
  border: 1px solid rgba(0,212,255,0.22);
  border-radius: 6px; color: var(--cyan);
  cursor: pointer; width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: all 0.2s; align-self: flex-end;
}
#send-btn:hover { background: rgba(0,212,255,0.16); border-color: var(--cyan); box-shadow: 0 0 16px var(--glow-c); transform: scale(1.05); }
#send-btn:active { transform: scale(0.95); }
#send-btn:disabled { background: rgba(255,255,255,0.02); border-color: var(--border); color: var(--text-muted); cursor: not-allowed; transform: none; box-shadow: none; }

#stop-btn {
  background: rgba(255,77,109,0.09);
  border: 1px solid rgba(255,77,109,0.25);
  color: var(--red); border-radius: 6px;
  cursor: pointer; width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0; transition: all 0.2s; align-self: flex-end;
}
#stop-btn:hover { background: rgba(255,77,109,0.18); box-shadow: 0 0 12px rgba(255,77,109,0.25); }
#stop-btn.hidden { display: none; }

/* ══════════════════════════════════════
   SETTINGS SHEET
══════════════════════════════════════ */
#settings-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.78);
  z-index: 300; display: flex;
  align-items: flex-end; justify-content: center;
  backdrop-filter: blur(8px);
}
#settings-overlay.hidden { display: none; }

#settings-panel {
  background: rgba(7,7,18,0.96);
  border: 1px solid var(--border);
  border-top-color: rgba(0,212,255,0.22);
  border-radius: 18px 18px 0 0;
  padding: 20px; width: 100%; max-width: 820px;
  max-height: 80vh; overflow-y: auto;
  animation: slideUp 0.25s ease;
  backdrop-filter: blur(20px);
  position: relative;
}
.settings-top-line {
  position: absolute; top: 0; left: 12%; right: 12%; height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), var(--purple), transparent);
  opacity: 0.45;
}
@keyframes slideUp { from { transform:translateY(100%); opacity:0; } to { transform:translateY(0); opacity:1; } }

#settings-panel h2 {
  font-size: 13px; font-weight: 700; margin-bottom: 18px;
  display: flex; align-items: center; justify-content: space-between;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted);
}
.settings-section { margin-bottom: 20px; }
.settings-section h3 {
  font-size: 10px; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.12em; color: rgba(0,212,255,0.38); margin-bottom: 10px;
}
.settings-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 10px 0; border-bottom: 1px solid var(--border); gap: 12px;
}
.settings-row:last-child { border-bottom: none; }
.settings-row-label { font-size: 13px; letter-spacing: 0.01em; }
.settings-row-desc { font-size: 11px; color: var(--text-muted); margin-top: 2px; letter-spacing: 0.01em; }

.settings-about { align-items: flex-start; gap: 14px; }
.settings-about-logo {
  flex-shrink: 0; width: 36px; height: 36px;
  background: rgba(0,212,255,0.05);
  border: 1px solid rgba(0,212,255,0.15);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  padding: 4px;
}

.danger-btn {
  background: rgba(255,77,109,0.05);
  border: 1px solid rgba(255,77,109,0.22);
  color: var(--red); border-radius: 5px;
  padding: 6px 14px; font-size: 11px; font-weight: 600;
  letter-spacing: 0.05em; text-transform: uppercase;
  cursor: pointer; transition: all 0.15s; white-space: nowrap;
}
.danger-btn:hover { background: rgba(255,77,109,0.12); box-shadow: 0 0 10px rgba(255,77,109,0.18); }

/* ══════════════════════════════════════
   SESSIONS SHEET
══════════════════════════════════════ */
#sessions-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.78);
  z-index: 300; display: flex;
  align-items: flex-end; justify-content: center;
  backdrop-filter: blur(8px);
}
#sessions-overlay.hidden { display: none; }

#sessions-panel {
  background: rgba(7,7,18,0.96);
  border: 1px solid var(--border);
  border-top-color: rgba(0,212,255,0.22);
  border-radius: 18px 18px 0 0;
  padding: 20px; width: 100%; max-width: 820px;
  max-height: 72vh; overflow-y: auto;
  animation: slideUp 0.25s ease;
  backdrop-filter: blur(20px);
  position: relative;
}

.sessions-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 14px;
}
.sessions-header h2 {
  font-size: 13px; font-weight: 700;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--text-muted);
}

#new-chat-btn {
  display: flex; align-items: center; gap: 6px;
  background: rgba(0,212,255,0.06);
  border: 1px solid rgba(0,212,255,0.22);
  border-radius: 6px; color: var(--cyan);
  padding: 6px 12px; font-size: 11px; font-weight: 600;
  letter-spacing: 0.06em; text-transform: uppercase;
  cursor: pointer; transition: all 0.15s; font-family: var(--font);
}
#new-chat-btn:hover { background: rgba(0,212,255,0.12); box-shadow: 0 0 12px var(--glow-c); }

#sessions-list { display: flex; flex-direction: column; gap: 4px; }

.session-item {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 12px; border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer; transition: all 0.15s;
}
.session-item:hover { background: var(--surface2); border-color: var(--border); }
.session-item.active {
  background: rgba(0,212,255,0.05);
  border-color: rgba(0,212,255,0.22);
}

.session-item-icon {
  color: var(--text-muted); flex-shrink: 0; opacity: 0.6;
}
.session-item.active .session-item-icon { color: var(--cyan); opacity: 1; }

.session-item-name {
  flex: 1; font-size: 13px; letter-spacing: 0.01em;
  white-space: nowrap; overflow: hidden; text-overflow: ellipsis;
  color: var(--text-muted);
}
.session-item.active .session-item-name { color: var(--text); }

.session-delete-btn {
  background: none; border: none; color: var(--text-muted);
  cursor: pointer; padding: 3px; border-radius: 4px;
  display: flex; align-items: center; justify-content: center;
  opacity: 0; transition: all 0.15s; flex-shrink: 0;
}
.session-item:hover .session-delete-btn { opacity: 0.5; }
.session-delete-btn:hover { opacity: 1 !important; color: var(--red); background: rgba(255,77,109,0.1); }

/* ── Toast ── */
#toast {
  position: fixed; bottom: 88px; left: 50%;
  transform: translateX(-50%) translateY(14px);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.22);
  border-radius: 4px; padding: 8px 18px;
  font-size: 11px; color: var(--cyan);
  letter-spacing: 0.05em; z-index: 400;
  opacity: 0; pointer-events: none;
  transition: opacity 0.2s, transform 0.2s;
  white-space: nowrap;
  box-shadow: 0 0 16px var(--glow-c);
  backdrop-filter: blur(12px);
}
#toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* ── Responsive ── */
@media (min-width: 600px) {
  #messages  { padding: 22px 26px 12px; }
  #input-area{ padding: 12px 26px 18px; }
  #header    { padding: 12px 26px; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration:0.01ms!important; transition-duration:0.01ms!important; }
}