:root {
  --bg: #0f0f0f;
  --sidebar-bg: #161616;
  --card: #1c1c1c;
  --card2: #222;
  --border: #2a2a2a;
  --accent: #8b5cf6;
  --accent-h: #7c3aed;
  --accent-glow: rgba(139,92,246,0.25);
  --text: #e5e5e5;
  --muted: #888;
  --success: #22c55e;
  --danger: #ef4444;
  --warning: #f59e0b;
  --info: #3b82f6;
  --sidebar-w: 240px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Inter', sans-serif; background: var(--bg); color: var(--text); min-height: 100vh; display: flex; overflow-x: hidden; }

/* SIDEBAR */
.sidebar { width: var(--sidebar-w); background: var(--sidebar-bg); border-right: 1px solid var(--border); display: flex; flex-direction: column; height: 100vh; position: fixed; left: 0; top: 0; z-index: 100; transition: transform .25s ease; }
.sidebar-header { padding: 20px 16px 16px; border-bottom: 1px solid var(--border); display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 18px; font-weight: 700; color: var(--accent); }
.sidebar-close { display: none; background: none; border: none; color: var(--muted); cursor: pointer; font-size: 18px; }
.sidebar-nav { flex: 1; padding: 12px 8px; overflow-y: auto; }
.nav-link { display: flex; align-items: center; gap: 10px; padding: 10px 12px; border-radius: 8px; color: var(--muted); text-decoration: none; font-size: 14px; font-weight: 500; transition: all .2s; margin-bottom: 2px; }
.nav-link:hover { background: var(--card); color: var(--text); }
.nav-link.active { background: var(--accent-glow); color: var(--accent); }
.sidebar-footer { padding: 12px; border-top: 1px solid var(--border); }
.user-info { margin-bottom: 8px; }
.user-name { font-weight: 600; font-size: 14px; margin-bottom: 4px; }
.logout-btn { display: block; text-align: center; padding: 8px; background: var(--card); border-radius: 8px; color: var(--muted); text-decoration: none; font-size: 13px; transition: all .2s; }
.logout-btn:hover { background: var(--danger); color: #fff; }
.sidebar-overlay { display: none; position: fixed; inset: 0; background: rgba(0,0,0,.6); z-index: 99; }

/* BADGE */
.badge { display: inline-block; padding: 2px 8px; border-radius: 20px; font-size: 11px; font-weight: 600; }
.badge-free { background: #333; color: var(--muted); }
.badge-premium { background: rgba(245,158,11,.15); color: var(--warning); }
.badge-admin { background: rgba(139,92,246,.15); color: var(--accent); }

/* MAIN */
.main { margin-left: var(--sidebar-w); flex: 1; display: flex; flex-direction: column; min-height: 100vh; }
.topbar { padding: 16px 24px; border-bottom: 1px solid var(--border); display: flex; align-items: center; gap: 16px; background: var(--sidebar-bg); position: sticky; top: 0; z-index: 50; }
.hamburger { display: none; background: none; border: none; color: var(--text); cursor: pointer; font-size: 22px; }
.page-title { font-size: 18px; font-weight: 600; }
.content { padding: 24px; flex: 1; max-width: 1000px; width: 100%; }

/* CARDS */
.card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; margin-bottom: 20px; }
.card-title { font-size: 15px; font-weight: 600; margin-bottom: 16px; color: var(--text); }
.stat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px,1fr)); gap: 12px; margin-bottom: 20px; }
.stat-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 16px; }
.stat-val { font-size: 26px; font-weight: 700; color: var(--accent); }
.stat-label { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* FORMS */
.form-group { margin-bottom: 16px; }
label { display: block; font-size: 13px; color: var(--muted); margin-bottom: 6px; font-weight: 500; }
input[type=text], input[type=email], input[type=password], input[type=number], select, textarea {
  width: 100%; padding: 10px 14px; background: var(--card2); border: 1px solid var(--border); border-radius: 8px;
  color: var(--text); font-size: 14px; font-family: inherit; transition: border-color .2s;
}
input:focus, select:focus, textarea:focus { outline: none; border-color: var(--accent); }
textarea { resize: vertical; min-height: 100px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 10px 20px; border-radius: 8px; font-size: 14px; font-weight: 600; cursor: pointer; border: none; transition: all .2s; text-decoration: none; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-h); box-shadow: 0 0 20px var(--accent-glow); }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #000; }
.btn-ghost { background: var(--card2); color: var(--text); border: 1px solid var(--border); }
.btn-sm { padding: 6px 12px; font-size: 12px; }
.btn-full { width: 100%; justify-content: center; }

/* ALERTS */
.alert { padding: 12px 16px; border-radius: 8px; font-size: 14px; margin-bottom: 16px; }
.alert-success { background: rgba(34,197,94,.1); border: 1px solid rgba(34,197,94,.3); color: var(--success); }
.alert-danger  { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); color: var(--danger); }
.alert-warning { background: rgba(245,158,11,.1); border: 1px solid rgba(245,158,11,.3); color: var(--warning); }
.alert-info    { background: rgba(59,130,246,.1); border: 1px solid rgba(59,130,246,.3); color: var(--info); }

/* TABLE */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 13px; }
th { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--border); color: var(--muted); font-weight: 600; text-transform: uppercase; font-size: 11px; letter-spacing: .5px; }
td { padding: 12px 14px; border-bottom: 1px solid var(--border); }
tr:last-child td { border-bottom: none; }
tr:hover td { background: rgba(255,255,255,.02); }

/* CHAT */
.chat-wrap { display: flex; flex-direction: column; height: calc(100vh - 65px); }
.chat-messages { flex: 1; overflow-y: auto; padding: 20px; display: flex; flex-direction: column; gap: 16px; }
.msg { display: flex; gap: 12px; max-width: 85%; }
.msg.user { flex-direction: row-reverse; align-self: flex-end; }
.msg-avatar { width: 36px; height: 36px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 16px; flex-shrink: 0; }
.msg.ai .msg-avatar { background: var(--accent-glow); }
.msg.user .msg-avatar { background: var(--card2); }
.msg-bubble { padding: 12px 16px; border-radius: 16px; font-size: 14px; line-height: 1.6; }
.msg.ai .msg-bubble { background: var(--card); border: 1px solid var(--border); border-top-left-radius: 4px; }
.msg.user .msg-bubble { background: var(--accent); color: #fff; border-top-right-radius: 4px; }
.msg-bubble pre { background: var(--bg); padding: 12px; border-radius: 8px; overflow-x: auto; margin-top: 8px; font-size: 12px; }
.msg-bubble code { font-family: monospace; }
.chat-input-area { padding: 16px 20px; border-top: 1px solid var(--border); background: var(--sidebar-bg); }
.chat-input-row { display: flex; gap: 10px; align-items: flex-end; }
.chat-input-row textarea { flex: 1; min-height: 48px; max-height: 180px; padding: 12px 14px; resize: none; line-height: 1.5; }
.typing-dots span { display: inline-block; width: 6px; height: 6px; background: var(--accent); border-radius: 50%; animation: dot 1.2s infinite; margin: 0 2px; }
.typing-dots span:nth-child(2) { animation-delay: .2s; }
.typing-dots span:nth-child(3) { animation-delay: .4s; }
@keyframes dot { 0%,80%,100%{transform:scale(0)} 40%{transform:scale(1)} }

/* GEN PAGES */
.gen-wrap { max-width: 800px; }
.gen-output { background: var(--card2); border: 1px solid var(--border); border-radius: 8px; padding: 16px; min-height: 120px; font-size: 14px; line-height: 1.8; white-space: pre-wrap; word-break: break-word; margin-top: 16px; }
.gen-output.loading { color: var(--muted); font-style: italic; }
.char-count { font-size: 12px; color: var(--muted); text-align: right; margin-top: 4px; }

/* AUTH PAGES */
.auth-wrap { min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--bg); padding: 20px; }
.auth-card { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 36px; width: 100%; max-width: 420px; }
.auth-logo { text-align: center; font-size: 28px; font-weight: 700; color: var(--accent); margin-bottom: 8px; }
.auth-sub { text-align: center; color: var(--muted); font-size: 14px; margin-bottom: 28px; }
.auth-footer { text-align: center; margin-top: 20px; font-size: 14px; color: var(--muted); }
.auth-footer a { color: var(--accent); text-decoration: none; }

/* UPGRADE */
.plan-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 24px; }
.plan-card { background: var(--card); border: 1px solid var(--border); border-radius: 12px; padding: 20px; }
.plan-card.featured { border-color: var(--accent); }
.plan-name { font-size: 16px; font-weight: 700; margin-bottom: 8px; }
.plan-price { font-size: 28px; font-weight: 700; color: var(--accent); margin-bottom: 12px; }
.plan-features { list-style: none; font-size: 13px; color: var(--muted); }
.plan-features li { padding: 4px 0; }
.plan-features li::before { content: '✓ '; color: var(--success); }

/* LANDING */
.landing { min-height: 100vh; display: flex; flex-direction: column; align-items: center; justify-content: center; text-align: center; padding: 40px 20px; background: radial-gradient(ellipse at top, rgba(139,92,246,.1) 0%, var(--bg) 60%); }
.landing h1 { font-size: clamp(32px,6vw,64px); font-weight: 700; margin-bottom: 16px; }
.landing h1 span { color: var(--accent); }
.landing p { font-size: 18px; color: var(--muted); max-width: 500px; margin-bottom: 32px; }
.landing-btns { display: flex; gap: 12px; flex-wrap: wrap; justify-content: center; }

/* SCROLL */
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* STATUS DOTS */
.status-dot { display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px; }
.status-online { background: var(--success); box-shadow: 0 0 6px var(--success); }
.status-offline { background: var(--danger); }

/* MOBILE */
@media (max-width: 768px) {
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-close { display: block; }
  .sidebar-overlay.open { display: block; }
  .main { margin-left: 0; }
  .hamburger { display: block; }
  .plan-grid { grid-template-columns: 1fr; }
  .stat-grid { grid-template-columns: 1fr 1fr; }
  .content { padding: 16px; }
  .chat-messages { padding: 12px; }
}