@import url('https://fonts.googleapis.com/css2?family=Sora:wght@200;300;400;500;600;700;800&family=JetBrains+Mono:wght@350;400;500;600&display=swap');

:root {
  --bg-base: #070604; --bg-surface: #0c0b09; --bg-raised: #141210;
  --bg-float: #1b1814; --bg-hover: #222018; --bg-active: #2a261c;
  --bdr-faint: rgba(255,210,100,0.04); --bdr-soft: rgba(255,210,100,0.09);
  --bdr-mid: rgba(255,210,100,0.16); --bdr-strong: rgba(255,210,100,0.28);
  --amber: #c4873a; --amber-bright: #e0a84e; --amber-vivid: #f0bc5e;
  --amber-dim: #8a6020; --amber-glow: rgba(200,135,58,0.13);
  --amber-ring: rgba(200,135,58,0.38);
  --ink-hi: #f2e8d4; --ink-med: #9a8a70; --ink-low: #52463a; --ink-dim: #2e2418;
  --user-bdr: rgba(200,135,58,0.22); --ai-bdr: rgba(255,210,100,0.08);
  --font: 'Sora', ui-sans-serif, system-ui, -apple-system, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
  --space-4: 8px; --space-5: 10px; --space-6: 12px; --space-7: 14px; --space-8: 16px; --space-9: 20px; --space-10: 24px; --space-12: 32px;
  --r-xs: 3px; --r-sm: 8px; --r-md: 12px; --r-lg: 16px; --r-xl: 20px; --r-2xl: 26px; --r-pill: 999px;
  --ease-out: cubic-bezier(0.22,0,0.08,1);
  --ease-spring: cubic-bezier(0.34,1.5,0.64,1);
  --ease-smooth: cubic-bezier(0.4,0,0.2,1);
  --ease-emerge: cubic-bezier(0.16,1,0.3,1);
  --t-fast: 90ms; --t-base: 170ms; --t-slow: 270ms;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.5), 0 2px 8px rgba(0,0,0,0.25);
  --shadow-md: 0 2px 8px rgba(0,0,0,0.55), 0 6px 24px rgba(0,0,0,0.3);
  --shadow-amber: 0 2px 14px rgba(200,135,58,0.32), 0 0 0 1px rgba(200,135,58,0.16);
  --shadow-amber-pop: 0 4px 22px rgba(200,135,58,0.55), 0 0 0 1px rgba(200,135,58,0.28);
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html { min-height: 100%; overflow-y: auto; -webkit-text-size-adjust: 100%; text-rendering: optimizeLegibility; background: #070604; }

body {
  min-height: 100dvh; overflow-x: hidden; overflow-y: auto;
  font-family: var(--font); font-size: 15px; line-height: 1.6;
  color: var(--ink-hi); background: transparent;
  -webkit-font-smoothing: antialiased;
}

::selection { background: rgba(200,135,58,0.22); color: var(--ink-hi); }

.container {
  display: flex; flex-direction: column; width: 100%; min-height: 100dvh;
  max-width: 740px; margin: 0 auto;
  background: #0c0b09;
  position: relative; overflow: hidden; isolation: isolate;
  box-shadow: inset 1px 0 0 var(--bdr-faint), inset -1px 0 0 var(--bdr-faint);
}

/* Holographic grid */
.container::before {
  content: ''; position: absolute; inset: 0; pointer-events: none; z-index: 0;
  background: repeating-linear-gradient(0deg, transparent 0 47px, rgba(200,135,58,0.012) 47px 48px),
              repeating-linear-gradient(90deg, transparent 0 47px, rgba(200,135,58,0.012) 47px 48px);
}

.container > * { position: relative; z-index: 1; }

.header {
  flex-shrink: 0; display: flex; align-items: center; justify-content: center;
  min-height: 54px; padding: var(--space-7) var(--space-8);
  background: linear-gradient(180deg, rgba(18,16,11,0.94), rgba(12,11,9,0.98));
  border-bottom: 1px solid var(--bdr-faint); position: relative; z-index: 10;
  font-size: 11.5px; font-weight: 600; text-align: center; color: var(--ink-hi);
}

.header::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 1px;
  background: linear-gradient(90deg, transparent, var(--amber-dim) 15%, var(--amber-bright) 50%, var(--amber-dim) 85%, transparent);
  opacity: 0.5;
}

.warning {
  margin: var(--space-7) var(--space-6) 0; padding: var(--space-7) var(--space-8);
  border-radius: var(--r-lg); border: 1px solid var(--bdr-mid);
  background: linear-gradient(180deg, rgba(200,135,58,0.12), rgba(27,24,20,0.94));
  color: var(--ink-hi); box-shadow: var(--shadow-sm); font-size: 14.5px; line-height: 1.7;
}

.warning strong { color: var(--amber-vivid); font-weight: 700; }

.model-section {
  display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-5) var(--space-6);
  margin: var(--space-6) var(--space-6) 0; padding: var(--space-7) var(--space-8);
  border-radius: var(--r-lg);
  background: linear-gradient(180deg, rgba(20,18,16,0.96), rgba(14,12,10,0.98));
  border: 1px solid var(--bdr-soft); box-shadow: var(--shadow-sm);
}

.model-section label { display: inline-flex; align-items: center; gap: var(--space-4); font-size: 11.5px; color: var(--ink-med); cursor: pointer; }

.model-section select {
  min-width: 220px; max-width: 100%; padding: var(--space-5) var(--space-6);
  border-radius: var(--r-md); border: 1px solid var(--bdr-mid);
  background: var(--bg-raised); color: var(--ink-hi); font: inherit; font-size: 11.5px; outline: none; cursor: pointer;
}

.model-section select:focus-visible { outline: 2px solid var(--amber-ring); outline-offset: 2px; }

.model-section input[type="checkbox"] { accent-color: var(--amber-bright); width: 16px; height: 16px; cursor: pointer; }

.status {
  margin: var(--space-6) var(--space-6) 0; padding: var(--space-5) var(--space-7);
  border-radius: var(--r-md); border: 1px solid var(--bdr-soft);
  background: linear-gradient(180deg, rgba(20,18,16,0.96), rgba(14,12,10,0.98));
  color: var(--ink-low); font-size: 11.5px; font-weight: 600;
  letter-spacing: 0.08em; text-transform: uppercase; box-shadow: var(--shadow-sm); text-align: center;
}

.status.ready { border-color: rgba(200,135,58,0.26); background: linear-gradient(180deg, rgba(200,135,58,0.10), rgba(20,18,16,0.96)); color: var(--amber-vivid); }
.status.sending { border-color: var(--amber-ring); color: var(--ink-hi); background: linear-gradient(180deg, rgba(200,135,58,0.06), rgba(20,18,16,0.96)); }

.clear-button {
  padding: var(--space-5) var(--space-7); border-radius: var(--r-pill);
  border: 1px solid var(--bdr-mid); background: var(--bg-hover); color: var(--ink-hi);
  font: inherit; font-size: 11.5px; font-weight: 500; cursor: pointer;
  transition: background var(--t-fast), border-color var(--t-fast), transform var(--t-fast);
}

.clear-button:hover { background: var(--bg-active); border-color: var(--bdr-strong); }
.clear-button:active { transform: scale(0.96); }

.chat-container {
  flex: 1; min-height: 0; overflow-y: auto; overflow-x: hidden;
  padding: var(--space-9) var(--space-7) var(--space-5);
  display: flex; flex-direction: column; gap: 2px;
}

.chat-container::-webkit-scrollbar { width: 3px; }
.chat-container::-webkit-scrollbar-track { background: transparent; }
.chat-container::-webkit-scrollbar-thumb { background: var(--bdr-soft); border-radius: var(--r-pill); }

.message {
  max-width: min(82%, 500px); padding: 10px 14px;
  font-size: 14.5px; line-height: 1.72; word-break: break-word; position: relative;
}

.ai-message {
  background: linear-gradient(165deg, rgba(30,27,20,0.94), rgba(18,16,12,0.97));
  color: var(--ink-hi); border: 1px solid var(--ai-bdr);
  border-radius: 3px var(--r-xl) var(--r-xl) var(--r-xl);
  box-shadow: 0 1px 3px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,255,255,0.03);
  align-self: flex-start;
}

.ai-message::before {
  content: ''; position: absolute; left: 0; top: 6px; bottom: 6px; width: 2px; border-radius: var(--r-pill);
  background: linear-gradient(to bottom, var(--amber-dim), transparent); opacity: 0.4;
}

.user-message {
  background: linear-gradient(165deg, rgba(28,24,14,0.97), rgba(16,13,6,0.99));
  color: var(--ink-hi); border: 1px solid var(--user-bdr);
  border-radius: var(--r-xl) 3px var(--r-xl) var(--r-xl);
  box-shadow: 0 1px 3px rgba(0,0,0,0.55), inset 0 1px 0 rgba(255,210,100,0.06);
  align-self: flex-end;
}

.message strong { font-weight: 600; color: var(--ink-hi); }
.message em { font-style: italic; color: var(--ink-med); }
.message code { font-family: var(--mono); font-size: 0.8em; background: rgba(255,255,255,0.06); border: 1px solid var(--bdr-soft); border-radius: var(--r-xs); padding: 1px 5px; }
.message pre { background: linear-gradient(180deg, rgba(0,0,0,0.55), rgba(0,0,0,0.45)); border: 1px solid var(--bdr-soft); border-radius: var(--r-md); padding: 12px 15px; overflow-x: auto; margin: 9px 0; font-family: var(--mono); font-size: 11.5px; line-height: 1.75; }
.message pre code { background: none; border: none; padding: 0; font-size: inherit; }
.message a { color: var(--amber-bright); text-decoration: none; border-bottom: 1px solid rgba(200,135,58,0.28); }
.message a:hover { color: var(--amber-vivid); }

.input-section {
  flex-shrink: 0; padding: var(--space-5) var(--space-6) var(--space-8);
  background: rgba(12,11,9,0.98);
  border-top: 1px solid var(--bdr-mid); position: relative; z-index: 10;
  box-shadow: 0 -4px 20px rgba(0,0,0,0.4);
}

.input-container {
  display: flex; align-items: flex-end; gap: var(--space-4);
  background: linear-gradient(160deg, var(--bg-float), var(--bg-raised));
  border: 1.5px solid var(--bdr-soft); border-radius: var(--r-2xl);
  padding: var(--space-4) var(--space-4) var(--space-4) var(--space-8);
  transition: border-color var(--t-base), box-shadow var(--t-base);
  box-shadow: 0 1px 4px rgba(0,0,0,0.4), inset 0 1px 0 rgba(255,255,255,0.025);
}

.input-container:focus-within { border-color: var(--bdr-strong); box-shadow: 0 0 0 3px var(--amber-glow), 0 2px 12px rgba(0,0,0,0.5); }

#messageInput {
  flex: 1; background: transparent; border: none; outline: none; resize: none;
  font-family: var(--font); font-size: 16px; font-weight: 400; line-height: 1.55;
  color: var(--ink-hi); caret-color: var(--amber-bright);
  min-height: 26px; max-height: 136px; overflow-y: auto;
  padding: 2px 0;
}

#messageInput::placeholder { color: var(--ink-low); font-weight: 300; }

#sendButton {
  flex-shrink: 0; min-width: 70px; height: 38px;
  border-radius: var(--r-pill); border: none;
  background: linear-gradient(145deg, var(--amber-bright), var(--amber));
  color: rgba(10,8,3,0.92); display: flex; align-items: center; justify-content: center;
  cursor: pointer; font-family: var(--font); font-size: 11px; font-weight: 700;
  padding: 0 14px; white-space: nowrap;
  transition: opacity var(--t-base), box-shadow var(--t-base), transform var(--t-fast);
  box-shadow: var(--shadow-amber);
}

#sendButton:hover:not(:disabled) { box-shadow: var(--shadow-amber-pop); transform: translateY(-1px); }
#sendButton:active:not(:disabled) { transform: scale(0.87); }
#sendButton:disabled { background: var(--bg-hover); color: var(--ink-dim); box-shadow: none; cursor: not-allowed; opacity: 0.45; }
#sendButton:focus-visible { outline: 2px solid var(--amber-ring); outline-offset: 3px; }

@media (max-width: 480px) {
  .container { max-width: 100%; }
  .header { font-size: 10px; padding: var(--space-6); min-height: 48px; }
  .warning, .status, .model-section { margin-left: var(--space-5); margin-right: var(--space-5); }
  .model-section { display: grid; grid-template-columns: 1fr; gap: var(--space-4); padding: var(--space-6); }
  .model-section select { width: 100%; min-width: 0; }
  .chat-container { padding: var(--space-8) var(--space-5); }
  .message { max-width: 88%; }
  .input-section { padding: var(--space-4) var(--space-5) var(--space-7); }
  #sendButton { min-width: 60px; height: 46px; }
}

@media (min-width: 640px) {
  .chat-container { padding: 28px 22px 10px; }
  .input-section { padding: var(--space-6) 22px var(--space-9); }
  .header { padding: 0 24px; height: 58px; }
  .message { max-width: 66%; }
}

@media (min-width: 1024px) {
  .container { max-width: 820px; border-radius: var(--r-xl); margin: var(--space-8) auto; min-height: calc(100dvh - var(--space-8) * 2); }
  .message { max-width: 58%; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
  .message { animation: none !important; }
}

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