/* assets/css/style.css
   No frameworks. No excuses. Just CSS. */

:root{
  --bg: #0b0f14;
  --panel: #0f1620;
  --panel2: #0c121b;
  --text: #e6edf3;
  --muted: #97a6b5;
  --border: rgba(255,255,255,.08);
  --accent: #5eead4;
  --danger: #ff6b6b;
  --ok: #7CFF9E;

  --radius: 14px;
  --shadow: 0 10px 30px rgba(0,0,0,.35);
  --font: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial;
}

[data-theme="light"]{
  --bg: #f6f7fb;
  --panel: #ffffff;
  --panel2:#f0f2f7;
  --text: #0b1220;
  --muted:#5b6b7a;
  --border: rgba(0,0,0,.10);
  --accent:#0ea5e9;
  --shadow: 0 10px 30px rgba(0,0,0,.12);
}

*{ box-sizing:border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
}

a{ color: inherit; text-decoration:none; }

code{
  background: rgba(127,127,127,.12);
  padding: .12rem .35rem;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* Buttons */
.btn{
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  padding: .55rem .8rem;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .06s ease, background .15s ease, border-color .15s ease;
  font-weight: 600;
}
.btn:hover{ background: rgba(255,255,255,.06); }
.btn:active{ transform: translateY(1px); }
.btn.primary{
  background: linear-gradient(135deg, rgba(94,234,212,.18), rgba(14,165,233,.18));
  border-color: rgba(94,234,212,.35);
}
.btn.ghost{ padding: .45rem .7rem; }

.alert{
  background: rgba(255,107,107,.12);
  border: 1px solid rgba(255,107,107,.35);
  color: var(--text);
  padding: .7rem .8rem;
  border-radius: 12px;
  margin: .8rem 0;
}
.alert.ok{
  background: rgba(124,255,158,.10);
  border-color: rgba(124,255,158,.35);
}

.small{ font-size: 12px; }
.muted{ color: var(--muted); }
.pad{ padding: 12px; }

/* Auth pages */
body.auth{ display:grid; place-items:center; padding: 24px; }
.auth-wrap{ width:min(420px, 100%); }
.auth-card{
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}
.auth-brand{ font-weight: 800; letter-spacing:.2px; opacity:.95; margin-bottom: 6px; }
.auth-card h1{ margin: 6px 0 14px 0; font-size: 22px; }
.auth-footer{
  margin-top: 14px;
  color: var(--muted);
  font-size: 12px;
  text-align:center;
}
.form label{ display:block; margin: 10px 0 6px; font-weight: 650; }
.form input{
  width:100%;
  padding: .7rem .8rem;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  outline: none;
}
.form input:focus{ border-color: rgba(94,234,212,.45); }
.auth-links{ margin-top: 14px; color: var(--muted); }
.auth-links a{ color: var(--accent); font-weight: 700; }

/* App layout */
.app{
  height:100vh;
  display:grid;
  grid-template-columns: 320px 1fr;
}

.sidebar{
  border-right: 1px solid var(--border);
  background: var(--panel);
  display:flex;
  flex-direction:column;
  min-width: 280px;
}
.sidebar-top{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 14px;
  border-bottom: 1px solid var(--border);
}
.brand{ font-weight: 900; letter-spacing:.2px; }

.sidebar-actions{
  display:flex;
  gap: 10px;
  padding: 12px 14px;
  border-bottom: 1px solid var(--border);
}

.chat-list{
  overflow:auto;
  padding: 10px;
  flex:1;
}
.chat-item{
  display:block;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  margin-bottom: 8px;
  background: rgba(255,255,255,.02);
}
.chat-item:hover{ background: rgba(255,255,255,.05); }
.chat-item.active{
  border-color: rgba(94,234,212,.35);
  background: rgba(94,234,212,.08);
}
.chat-title{ font-weight: 750; }
.chat-meta{ color: var(--muted); font-size: 12px; margin-top: 4px; }

.sidebar-bottom{
  padding: 14px;
  border-top: 1px solid var(--border);
}
.user-pill{
  display:flex;
  align-items:center;
  gap: 10px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.02);
  padding: 10px 12px;
  border-radius: 999px;
}
.dot{
  width:10px; height:10px;
  border-radius:50%;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(94,234,212,.15);
}

.main{
  display:flex;
  flex-direction:column;
  height:100%;
}
.topbar{
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
  background: rgba(0,0,0,.05);
}
.topbar-title{ font-weight: 850; }

.messages{
  flex: 1;
  overflow:auto;
  padding: 18px;
}
.msg{ display:flex; margin: 10px 0; }
.msg.user{ justify-content:flex-end; }
.msg.assistant{ justify-content:flex-start; }

.bubble{
  max-width: min(760px, 92%);
  padding: 12px 14px;
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,.03);
  line-height: 1.45;
  white-space: normal;
  word-wrap: break-word;
}
.msg.user .bubble{
  background: rgba(14,165,233,.12);
  border-color: rgba(14,165,233,.25);
}
.msg.assistant .bubble{
  background: rgba(94,234,212,.08);
  border-color: rgba(94,234,212,.20);
}

.empty{
  max-width: 720px;
  margin: 12vh auto 0;
  padding: 20px;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  background: rgba(255,255,255,.02);
}
.empty h2{ margin: 0 0 8px 0; }
.empty p{ margin: 0; color: var(--muted); }

.composer{
  border-top: 1px solid var(--border);
  padding: 12px;
  background: var(--panel);
}
#chatForm{
  display:flex;
  gap: 10px;
  align-items:flex-end;
}
#prompt{
  flex:1;
  resize:none;
  min-height: 44px;
  max-height: 180px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--panel2);
  color: var(--text);
  outline:none;
}
#prompt:focus{ border-color: rgba(94,234,212,.45); }
#sendBtn{ height: 44px; }

/* Mobile */
@media (max-width: 900px){
  .app{ grid-template-columns: 1fr; }
  .sidebar{ display:none; }
  .topbar{ position: sticky; top:0; z-index:10; }
}