/* ── RESET & BASE ─────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0a0a0f;
    --surface: rgba(255,255,255,0.04);
    --border: rgba(255,255,255,0.08);
    --border-hover: rgba(255,255,255,0.15);
    --text: #f0f0f8;
    --text-dim: rgba(240,240,248,0.55);
    --text-dimmer: rgba(240,240,248,0.3);
    --green: #22c55e;
    --green-glow: rgba(34,197,94,0.25);
    --blue: #6366f1;
    --blue-glow: rgba(99,102,241,0.25);
    --purple: #a855f7;
    --purple-glow: rgba(168,85,247,0.25);
    --red: #ef4444;
    --yellow: #eab308;
    --radius: 16px;
    --radius-sm: 10px;
    --radius-xs: 6px;
    --transition: 0.2s ease;
}

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: 'Inter', sans-serif;
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    display: flex;
    flex-direction: column;
}

/* ── BACKGROUND ORBS ──────────────────────────────────────────────────────── */
.bg-orb { position: fixed; border-radius: 50%; filter: blur(80px); pointer-events: none; z-index: 0; }
.orb-1  { width:500px; height:500px; background:radial-gradient(circle,rgba(99,102,241,0.12),transparent 70%); top:-150px; left:-100px; }
.orb-2  { width:400px; height:400px; background:radial-gradient(circle,rgba(168,85,247,0.1),transparent 70%); top:30%; right:-100px; }
.orb-3  { width:350px; height:350px; background:radial-gradient(circle,rgba(34,197,94,0.07),transparent 70%); bottom:10%; left:20%; }

/* ── NAVBAR ───────────────────────────────────────────────────────────────── */
.navbar {
    position: sticky; top: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 14px 28px;
    background: rgba(10,10,15,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}
.nav-brand { display: flex; align-items: center; gap: 12px; }
.nav-logo {
    width:38px; height:38px;
    background: linear-gradient(135deg, var(--blue), var(--purple));
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px;
    box-shadow: 0 0 20px var(--blue-glow);
}
.brand-name { font-weight:700; font-size:16px; letter-spacing:-0.3px; }
.brand-sub  { display:block; font-size:11px; color:var(--text-dim); font-weight:400; }

.nav-right { display:flex; align-items:center; gap:10px; flex-wrap:wrap; justify-content:flex-end; }
.nav-stats { display:flex; gap:8px; flex-wrap:wrap; }
.stat-pill {
    display:flex; align-items:center; gap:6px;
    padding:6px 12px;
    background:var(--surface); border:1px solid var(--border); border-radius:20px;
    font-size:13px; font-weight:500; color:var(--text-dim);
}
.dot { width:7px; height:7px; border-radius:50%; flex-shrink:0; }
.dot-green  { background:var(--green);  box-shadow:0 0 6px var(--green); }
.dot-blue   { background:var(--blue);   box-shadow:0 0 6px var(--blue); }
.dot-purple { background:var(--purple); box-shadow:0 0 6px var(--purple); }

.admin-toggle-btn {
    padding:8px 16px;
    background:rgba(99,102,241,0.12); border:1px solid rgba(99,102,241,0.3); border-radius:20px;
    color:var(--blue); font-size:13px; font-weight:700;
    cursor:pointer; white-space:nowrap;
    transition:background var(--transition), border-color var(--transition);
}
.admin-toggle-btn:hover { background:rgba(99,102,241,0.2); }
.admin-toggle-btn.admin-active { background:rgba(34,197,94,0.12); border-color:rgba(34,197,94,0.35); color:var(--green); }

/* ── CONTAINER ────────────────────────────────────────────────────────────── */
.container {
    position:relative; z-index:1;
    max-width:900px; margin:0 auto;
    padding:48px 20px 60px;
    display:flex; flex-direction:column; gap:32px;
    flex:1;
}

/* ── HERO ─────────────────────────────────────────────────────────────────── */
.hero { text-align:center; padding:16px 0 8px; }
.hero-badge {
    display:inline-flex; align-items:center; gap:8px;
    padding:6px 16px;
    background:rgba(34,197,94,0.08); border:1px solid rgba(34,197,94,0.2); border-radius:20px;
    font-size:12px; font-weight:600; color:var(--green);
    letter-spacing:0.5px; text-transform:uppercase; margin-bottom:20px;
}
.pulse-dot { width:7px; height:7px; background:var(--green); border-radius:50%; animation:pulse 2s infinite; }
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1);} 50%{opacity:0.5;transform:scale(0.8);} }
.hero-title { font-size:clamp(2rem,5vw,3.2rem); font-weight:800; line-height:1.15; letter-spacing:-1.5px; margin-bottom:14px; }
.gradient-text {
    background:linear-gradient(135deg,var(--blue),var(--purple),#ec4899);
    -webkit-background-clip:text; -webkit-text-fill-color:transparent; background-clip:text;
}
.hero-sub { font-size:16px; color:var(--text-dim); max-width:440px; margin:0 auto; }

/* ── STATS ROW ────────────────────────────────────────────────────────────── */
.stats-row { display:grid; grid-template-columns:repeat(auto-fit,minmax(180px,1fr)); gap:14px; }
.stat-card {
    display:flex; align-items:center; gap:14px;
    padding:18px 20px;
    background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
    backdrop-filter:blur(12px);
    transition:border-color var(--transition), transform var(--transition);
}
.stat-card:hover { border-color:var(--border-hover); transform:translateY(-2px); }
.stat-icon  { font-size:22px; }
.stat-value { font-size:22px; font-weight:700; letter-spacing:-0.5px; }
.stat-label { font-size:12px; color:var(--text-dim); font-weight:500; margin-top:1px; }

/* ── CARD ─────────────────────────────────────────────────────────────────── */
.card { background:var(--surface); border:1px solid var(--border); border-radius:var(--radius); padding:28px; backdrop-filter:blur(12px); }
.card-header { display:flex; align-items:flex-start; gap:16px; margin-bottom:24px; }
.card-icon {
    font-size:26px; width:48px; height:48px;
    background:linear-gradient(135deg,var(--blue-glow),var(--purple-glow));
    border:1px solid var(--border); border-radius:12px;
    display:flex; align-items:center; justify-content:center; flex-shrink:0;
}
.card-title { font-size:18px; font-weight:700; margin-bottom:3px; }
.card-sub   { font-size:13px; color:var(--text-dim); }

/* ── PAIR FORM ────────────────────────────────────────────────────────────── */
.pair-form { display:flex; flex-direction:column; gap:10px; }
.input-group {
    display:flex; align-items:center;
    background:rgba(255,255,255,0.04); border:1px solid var(--border); border-radius:var(--radius-sm);
    overflow:hidden;
    transition:border-color var(--transition), box-shadow var(--transition);
}
.input-group:focus-within { border-color:var(--blue); box-shadow:0 0 0 3px var(--blue-glow); }
.input-prefix { padding:0 14px; font-size:16px; font-weight:600; color:var(--text-dim); border-right:1px solid var(--border); height:52px; display:flex; align-items:center; flex-shrink:0; }
.phone-input { flex:1; background:transparent; border:none; outline:none; padding:0 16px; height:52px; font-size:16px; font-family:'JetBrains Mono',monospace; font-weight:500; color:var(--text); letter-spacing:0.5px; }
.phone-input::placeholder { color:var(--text-dimmer); font-family:'Inter',sans-serif; font-weight:400; }
.pair-btn {
    height:52px; padding:0 24px;
    background:linear-gradient(135deg,var(--blue),var(--purple));
    border:none; color:#fff; font-size:14px; font-weight:700;
    cursor:pointer; white-space:nowrap;
    display:flex; align-items:center; gap:8px;
    transition:opacity var(--transition), transform var(--transition); flex-shrink:0;
}
.pair-btn:hover:not(:disabled) { opacity:0.9; }
.pair-btn:active:not(:disabled) { transform:scale(0.97); }
.pair-btn:disabled { opacity:0.5; cursor:not-allowed; }
.input-hint { font-size:12px; color:var(--text-dimmer); }
.input-hint code { background:rgba(255,255,255,0.07); padding:1px 6px; border-radius:4px; font-family:'JetBrains Mono',monospace; color:var(--text-dim); }

/* ── CODE DISPLAY ─────────────────────────────────────────────────────────── */
.code-display {
    margin-top:24px; padding:24px;
    background:rgba(34,197,94,0.04); border:1px solid rgba(34,197,94,0.2); border-radius:var(--radius-sm);
    animation:fadeSlideIn 0.4s ease;
}
@keyframes fadeSlideIn { from{opacity:0;transform:translateY(10px);} to{opacity:1;transform:translateY(0);} }
.code-header { display:flex; justify-content:space-between; align-items:center; margin-bottom:14px; }
.code-label { font-size:12px; font-weight:700; text-transform:uppercase; letter-spacing:1px; color:var(--green); }
.code-timer { font-size:12px; color:var(--text-dim); font-family:'JetBrains Mono',monospace; }
.code-box { display:flex; align-items:center; justify-content:space-between; background:rgba(0,0,0,0.3); border:1px solid rgba(34,197,94,0.25); border-radius:var(--radius-sm); padding:16px 20px; margin-bottom:20px; }
.code-value { font-family:'JetBrains Mono',monospace; font-size:clamp(1.6rem,4vw,2.4rem); font-weight:700; letter-spacing:6px; color:var(--green); text-shadow:0 0 20px var(--green-glow); }
.copy-btn { background:rgba(34,197,94,0.1); border:1px solid rgba(34,197,94,0.25); border-radius:var(--radius-xs); padding:8px 12px; cursor:pointer; font-size:16px; transition:background var(--transition); flex-shrink:0; }
.copy-btn:hover { background:rgba(34,197,94,0.2); }
.code-steps { display:flex; flex-direction:column; gap:10px; }
.step { display:flex; align-items:flex-start; gap:12px; font-size:13px; color:var(--text-dim); }
.step-num { width:22px; height:22px; background:rgba(99,102,241,0.2); border:1px solid var(--blue); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:11px; font-weight:700; color:var(--blue); flex-shrink:0; margin-top:1px; }
.step strong { color:var(--text); }
.pair-status { margin-top:14px; font-size:13px; font-weight:600; text-align:center; min-height:20px; }

/* ── ALERTS ───────────────────────────────────────────────────────────────── */
.alert { display:flex; align-items:center; gap:10px; padding:14px 16px; border-radius:var(--radius-sm); font-size:13px; font-weight:500; margin-top:16px; }
.alert-error { background:rgba(239,68,68,0.08); border:1px solid rgba(239,68,68,0.25); color:#fca5a5; }
.alert-icon { font-size:16px; flex-shrink:0; }

/* ── SESSIONS ─────────────────────────────────────────────────────────────── */
.sessions-section { display:flex; flex-direction:column; gap:16px; }
.section-header { display:flex; justify-content:space-between; align-items:flex-end; }
.section-title  { font-size:20px; font-weight:700; margin-bottom:3px; }
.section-sub    { font-size:13px; color:var(--text-dim); }
.refresh-btn { display:flex; align-items:center; gap:6px; padding:8px 16px; background:var(--surface); border:1px solid var(--border); border-radius:var(--radius-xs); color:var(--text-dim); font-size:13px; font-weight:600; cursor:pointer; transition:border-color var(--transition), color var(--transition); }
.refresh-btn:hover { border-color:var(--border-hover); color:var(--text); }

.sessions-grid { display:grid; grid-template-columns:repeat(auto-fill,minmax(260px,1fr)); gap:14px; }
.empty-state { grid-column:1/-1; text-align:center; padding:60px 20px; border:2px dashed var(--border); border-radius:var(--radius); }
.empty-icon  { font-size:40px; margin-bottom:12px; }
.empty-title { font-size:16px; font-weight:600; margin-bottom:6px; }
.empty-sub   { font-size:13px; color:var(--text-dim); }

/* ── SESSION CARD ─────────────────────────────────────────────────────────── */
.session-card {
    display:flex; flex-direction:column; gap:16px; padding:20px;
    background:var(--surface); border:1px solid var(--border); border-radius:var(--radius);
    backdrop-filter:blur(12px);
    transition:border-color var(--transition), transform var(--transition);
    animation:fadeSlideIn 0.3s ease;
}
.session-card:hover  { border-color:var(--border-hover); transform:translateY(-2px); }
.session-card.online { border-color:rgba(34,197,94,0.3); }
.session-top { display:flex; align-items:center; gap:12px; }
.session-avatar { width:44px; height:44px; background:linear-gradient(135deg,var(--blue),var(--purple)); border-radius:50%; display:flex; align-items:center; justify-content:center; font-size:18px; flex-shrink:0; }
.session-info { flex:1; min-width:0; }
.session-number-row { display:flex; align-items:center; gap:8px; flex-wrap:wrap; }
.session-number { font-family:'JetBrains Mono',monospace; font-size:14px; font-weight:700; white-space:nowrap; overflow:hidden; text-overflow:ellipsis; }
.own-badge { font-size:10px; font-weight:700; padding:2px 8px; background:rgba(99,102,241,0.15); border:1px solid rgba(99,102,241,0.35); border-radius:20px; color:var(--blue); text-transform:uppercase; letter-spacing:0.5px; white-space:nowrap; }
.session-status { display:flex; align-items:center; gap:5px; font-size:12px; font-weight:600; margin-top:3px; }
.session-status.online  { color:var(--green); }
.session-status.offline { color:var(--text-dimmer); }
.session-actions { display:flex; gap:8px; }
.btn-action { flex:1; padding:8px 12px; border-radius:var(--radius-xs); font-size:12px; font-weight:600; cursor:pointer; border:none; transition:opacity var(--transition), transform var(--transition); text-align:center; }
.btn-action:active { transform:scale(0.96); }
.btn-delete-session { background:rgba(239,68,68,0.1); border:1px solid rgba(239,68,68,0.25); color:#fca5a5; }
.btn-delete-session:hover { background:rgba(239,68,68,0.18); }

/* ── MODAL ────────────────────────────────────────────────────────────────── */
.modal-overlay { position:fixed; inset:0; background:rgba(0,0,0,0.7); backdrop-filter:blur(6px); z-index:200; display:flex; align-items:center; justify-content:center; padding:20px; animation:fadeIn 0.2s ease; }
@keyframes fadeIn { from{opacity:0;} to{opacity:1;} }
.modal { background:#13131f; border:1px solid var(--border); border-radius:var(--radius); padding:32px; max-width:400px; width:100%; text-align:center; box-shadow:0 20px 60px rgba(0,0,0,0.5); animation:scaleIn 0.2s ease; }
@keyframes scaleIn { from{opacity:0;transform:scale(0.95);} to{opacity:1;transform:scale(1);} }
.modal-icon  { font-size:40px; margin-bottom:14px; }
.modal-title { font-size:20px; font-weight:700; margin-bottom:10px; }
.modal-body  { font-size:14px; color:var(--text-dim); line-height:1.6; margin-bottom:24px; }
.modal-body strong { color:var(--text); }
.modal-actions { display:flex; gap:10px; }
.btn-cancel, .btn-delete, .btn-admin-login { flex:1; padding:12px; border-radius:var(--radius-xs); font-size:14px; font-weight:700; cursor:pointer; transition:opacity var(--transition); }
.btn-cancel { background:var(--surface); border:1px solid var(--border); color:var(--text-dim); }
.btn-cancel:hover { opacity:0.8; }
.btn-delete { background:var(--red); border:none; color:#fff; }
.btn-delete:hover { opacity:0.85; }
.btn-delete:disabled { opacity:0.5; cursor:not-allowed; }
.btn-admin-login { background:linear-gradient(135deg,var(--blue),var(--purple)); border:none; color:#fff; }
.btn-admin-login:hover { opacity:0.88; }

/* ── ADMIN PASSWORD INPUT ──────────────────────────────────────────────────── */
.admin-input-wrap { margin-top:8px; }
.admin-password-input { width:100%; padding:12px 16px; background:rgba(255,255,255,0.05); border:1px solid var(--border); border-radius:var(--radius-sm); color:var(--text); font-size:15px; font-family:'JetBrains Mono',monospace; outline:none; transition:border-color var(--transition), box-shadow var(--transition); }
.admin-password-input:focus { border-color:var(--blue); box-shadow:0 0 0 3px var(--blue-glow); }

/* ── TOAST ────────────────────────────────────────────────────────────────── */
.toast { position:fixed; bottom:28px; left:50%; transform:translateX(-50%); z-index:300; padding:12px 22px; background:#1e1e2e; border:1px solid var(--border); border-radius:30px; font-size:14px; font-weight:600; color:var(--text); box-shadow:0 8px 32px rgba(0,0,0,0.4); white-space:nowrap; animation:toastIn 0.3s ease; }
@keyframes toastIn { from{opacity:0;transform:translateX(-50%) translateY(12px);} to{opacity:1;transform:translateX(-50%) translateY(0);} }

/* ── SPINNER ──────────────────────────────────────────────────────────────── */
.spinner { width:16px; height:16px; border:2px solid rgba(255,255,255,0.3); border-top-color:#fff; border-radius:50%; animation:spin 0.7s linear infinite; flex-shrink:0; }
@keyframes spin { to{transform:rotate(360deg);} }

/* ── FOOTER ───────────────────────────────────────────────────────────────── */
.footer { position:relative; z-index:1; border-top:1px solid var(--border); background:rgba(10,10,15,0.8); backdrop-filter:blur(12px); padding:20px 28px; flex-shrink:0; }
.footer-inner { max-width:900px; margin:0 auto; display:flex; align-items:center; justify-content:center; gap:10px; flex-wrap:wrap; font-size:13px; color:var(--text-dim); }
.footer-logo  { font-size:16px; filter:drop-shadow(0 0 6px var(--blue)); }
.footer-inner strong { color:var(--text); font-weight:700; }
.footer-dot   { color:var(--text-dimmer); font-size:16px; line-height:1; }

/* ── UTILITY ──────────────────────────────────────────────────────────────── */
.hidden { display:none !important; }

/* ── RESPONSIVE ───────────────────────────────────────────────────────────── */
@media (max-width:600px) {
    .navbar         { padding:12px 14px; }
    .nav-stats      { display:none; }
    .container      { padding:24px 14px 48px; gap:20px; }
    .card           { padding:18px 14px; }
    .code-value     { letter-spacing:3px; }
    .pair-btn       { padding:0 14px; font-size:13px; }
    .section-header { flex-direction:column; align-items:flex-start; gap:10px; }
    .footer-inner   { font-size:12px; gap:6px; }
    .footer-dot     { display:none; }
    .stats-row      { grid-template-columns:repeat(2,1fr); }
    .hero-title     { font-size:1.8rem; letter-spacing:-1px; }
}