@import url("https://fonts.googleapis.com/css2?family=Cairo:wght@400;600;700;800;900&display=swap");
:root{
  --bg:#061224;--surface:#0d1b34;--surface2:#122546;--stroke:#24416f;--text:#eef6ff;--muted:#9eb4dc;
  --primary:#0ea5a4;--secondary:#143f7f;--accent:#f8b400;--danger:#ff4d6d;--success:#18c964;
  --radius:18px;--shadow:0 12px 40px rgba(2,10,25,.45);
}
:root.light{--bg:#eef4ff;--surface:#fff;--surface2:#f7faff;--stroke:#d9e4ff;--text:#121a30;--muted:#5f7098}
*{box-sizing:border-box}html,body{margin:0}
body{font-family:"Cairo",sans-serif;background:var(--bg);color:var(--text)}
a{text-decoration:none;color:inherit}
.container{max-width:1280px;margin:auto;padding:20px}
.topbar{position:sticky;top:0;z-index:100;background:rgba(6,18,36,.9);border-bottom:1px solid var(--stroke);backdrop-filter:blur(8px)}
.topbar-inner{max-width:1280px;margin:auto;padding:12px 20px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.brand{font-weight:900;font-size:28px;background:linear-gradient(90deg,var(--primary),#46d3c4,var(--danger));-webkit-background-clip:text;color:transparent}
.nav-links{display:flex;gap:8px;flex-wrap:wrap}.nav-links a{padding:8px 12px;border-radius:12px;color:var(--muted)}.nav-links a:hover{background:var(--surface)}
.icon-btn{height:40px;width:40px;border-radius:10px;border:1px solid var(--stroke);background:var(--surface);color:var(--text)}

/* landing */
.hero-landing{background:url('https://images.unsplash.com/photo-1514525253161-7a46d19cd819?auto=format&fit=crop&w=1500&q=80') center/cover;border-radius:24px;overflow:hidden;position:relative;border:1px solid var(--stroke)}
.hero-landing::before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,18,44,.68),rgba(0,18,44,.82))}
.hero-content{position:relative;padding:62px 24px;text-align:center}
.hero-content h1{font-size:56px;margin:0 0 8px}.hero-content p{color:#d8e8ff;margin:0 0 18px}
.hero-actions{display:flex;justify-content:center;flex-wrap:wrap;gap:10px}
.btn{border:0;border-radius:14px;padding:11px 18px;font-weight:700;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
.btn-primary{background:linear-gradient(120deg,var(--primary),#22c8ba);color:#fff}
.btn-secondary{background:#163a78;color:#fff}
.btn-success{background:#5fae24;color:#fff}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}

.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:12px;margin-top:14px}
.feature-block{padding:16px;border-radius:14px;color:#fff}
.c1{background:#ec4899}.c2{background:#2563eb}.c3{background:#0ea5a4}.c4{background:#7c3aed}.c5{background:#dc2626}.c6{background:#0f766e}

/* rooms */
.rooms-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.room-card{background:var(--surface);border:1px solid var(--stroke);border-radius:16px;padding:14px;box-shadow:var(--shadow);transition:.2s}
.room-card:hover{transform:translateY(-4px)}
.room-meta{display:flex;justify-content:space-between;color:var(--muted)}
.join-btn{margin-top:10px;background:#0f7a2d;color:#fff;border-radius:12px;padding:9px 12px;display:block;text-align:center}

/* chat layout */
.chat-layout{display:grid;grid-template-columns:220px 1fr 300px;gap:12px}
.left-menu,.chat-center,.right-users{background:var(--surface);border:1px solid var(--stroke);border-radius:18px}
.left-menu{padding:10px}.left-menu a{display:flex;justify-content:space-between;padding:10px;border-radius:10px;color:var(--muted)}.left-menu a:hover{background:var(--surface2);color:var(--text)}
.chat-center{padding:10px;position:relative}
.messages{height:58vh;overflow:auto;border:1px solid var(--stroke);border-radius:14px;background:var(--surface2);padding:8px}
.msg{background:rgba(255,255,255,.03);padding:8px;border-radius:10px;margin-bottom:8px}
.msg.system{background:rgba(20,165,164,.18)}
.msg-top{display:flex;align-items:center;gap:6px}
.avatar{width:28px;height:28px;border-radius:50%;background:#163c70;display:flex;align-items:center;justify-content:center}
.badge{font-size:11px;padding:2px 8px;border-radius:999px}.b-member{background:#1d4ed8}.b-guest{background:#64748b}.b-vip{background:#9333ea}.b-admin{background:#f59e0b;color:#111}.b-super{background:#dc2626}
.msg-name.male{color:#60a5fa}.msg-name.female{color:#f472b6}.msg-name.other{color:#c4b5fd}
.composer{display:flex;gap:8px;margin-top:10px}.composer input{flex:1;background:var(--surface2);border:1px solid var(--stroke);border-radius:999px;padding:12px;color:var(--text)}
.circle-send{width:46px;height:46px;border-radius:50%;border:0;background:#0ea5a4;color:#fff;font-size:18px}

.right-users{padding:10px}
.users-header{background:#0f8a2a;color:#fff;border-radius:10px;padding:8px;text-align:center;font-weight:700}
.user-search{width:100%;margin:8px 0;background:var(--surface2);border:1px solid var(--stroke);padding:9px;border-radius:10px;color:var(--text)}
.user-item{display:flex;align-items:center;gap:8px;padding:8px;border-radius:10px;border:1px solid var(--stroke);margin-bottom:7px;cursor:pointer}.user-item:hover{background:var(--surface2)}
.status-dot{width:9px;height:9px;border-radius:50%}.online{background:#18c964}.offline{background:#64748b}

/* modals */
.modal-backdrop{position:fixed;inset:0;background:rgba(0,0,0,.55);display:none;align-items:center;justify-content:center;z-index:250}
.modal-backdrop.show{display:flex}
.modal-card{width:min(760px,95vw);background:var(--surface);border:1px solid var(--stroke);border-radius:18px;box-shadow:var(--shadow);overflow:hidden}
.modal-head{padding:16px;background:#06384d;display:flex;justify-content:space-between;align-items:center}
.modal-body{padding:16px}
.tabs{display:flex;gap:10px;flex-wrap:wrap}.tab{padding:8px 12px;border-radius:10px;background:var(--surface2);color:var(--muted)}
.warn{color:#ff8080;font-weight:700}
.guest-warning{max-width:520px}

.toast{position:fixed;bottom:85px;left:50%;transform:translateX(-50%);background:#0b7f6f;color:#fff;padding:10px 14px;border-radius:10px;display:none;z-index:260}
.toast.show{display:block}
.skeleton{animation:pulse 1.4s infinite;background:linear-gradient(90deg,#213a62,#2b4b78,#213a62)}
@keyframes pulse{0%{opacity:.6}50%{opacity:1}100%{opacity:.6}}

.bottom-nav{display:none;position:fixed;bottom:0;left:0;right:0;background:#04243f;border-top:1px solid #1f4b71;z-index:220;padding:8px 0}
.bottom-nav a{color:#fff;text-align:center;flex:1}

@media(max-width:980px){
  .chat-layout{grid-template-columns:1fr}
  .left-menu{order:2}.right-users{order:3}.chat-center{order:1}
  .bottom-nav{display:flex}
  .hero-content h1{font-size:36px}
}


.card-strong{background:var(--surface);border:1px solid var(--stroke);border-radius:16px;box-shadow:var(--shadow)}
.auth-shell{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:16px}
.auth-visual{padding:20px}.auth-visual p,.auth-visual li{color:var(--muted)}
.auth-form{padding:20px;display:grid;gap:10px}
.input{background:var(--surface2);border:1px solid var(--stroke);padding:11px;border-radius:12px;color:var(--text);width:100%}
.admin-layout{display:grid;grid-template-columns:250px 1fr;min-height:100vh}
.sidebar{background:#08172e;border-left:1px solid var(--stroke);padding:16px}
.side-link{display:block;padding:10px;border-radius:10px;color:var(--muted)}
.side-link:hover{background:var(--surface2);color:var(--text)}
.admin-content{padding:16px}
.admin-kpi-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:10px}
.admin-kpi{background:var(--surface);border:1px solid var(--stroke);padding:12px;border-radius:12px}
.admin-form-grid{display:grid;grid-template-columns:1fr 1fr auto;gap:8px}
.table-wrap{overflow:auto}.admin-table{width:100%;border-collapse:collapse}.admin-table th,.admin-table td{padding:10px;border-bottom:1px solid var(--stroke);text-align:right}
@media(max-width:980px){.auth-shell{grid-template-columns:1fr}.admin-layout{grid-template-columns:1fr}.admin-form-grid{grid-template-columns:1fr}}

.b-danger{background:#ef4444;color:#fff}
mark{background:rgba(255,215,0,.25);color:#ffd54a;padding:1px 5px;border-radius:6px}