:root {
    --bg-color: #0f172a;
    --glass-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --danger: #ef4444;
    --success: #10b981;
    --warning: #f59e0b;
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Segoe UI', system-ui, sans-serif; }
body { background: var(--bg-color); color: var(--text-primary); height: 100vh; overflow: hidden; }

/* View Routing */
.view { display: none; height: 100%; flex-direction: column; }
.view.active { display: flex; }

/* UI Components */
.glass-card { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); border-radius: 12px; padding: 25px; }
.glass-nav { background: var(--glass-bg); backdrop-filter: blur(12px); border: 1px solid var(--glass-border); padding: 15px 25px; display: flex; justify-content: space-between; align-items: center; border-radius: 0 0 12px 12px; margin-bottom: 20px; }

.btn { padding: 12px 18px; border: none; border-radius: 8px; cursor: pointer; font-weight: bold; color: white; transition: 0.2s; }
.btn-primary { background: var(--primary); }
.btn-primary:hover { background: var(--primary-hover); }
.btn-secondary { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-secondary:hover { background: var(--primary); color: white; }
.btn-danger { background: var(--danger); }
.btn-success { background: var(--success); }
.btn-warning { background: var(--warning); color: #000; }

.btn-icon { background: rgba(255,255,255,0.05); border: 1px solid var(--glass-border); border-radius: 50%; width: 45px; height: 45px; font-size: 1.2rem; cursor: pointer; color: white; display: flex; align-items: center; justify-content: center; }
.btn-icon:hover { background: var(--primary); }

input { width: 100%; padding: 12px; margin-bottom: 12px; border-radius: 8px; border: 1px solid var(--glass-border); background: rgba(0,0,0,0.3); color: white; outline: none; }
input:focus { border-color: var(--primary); }

/* Layouts */
.auth-box { width: 90%; max-width: 400px; margin: auto; }
.dash-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); gap: 20px; padding: 0 20px; overflow-y: auto; }

/* Meeting Workspace */
.meeting-workspace { display: flex; flex: 1; overflow: hidden; position: relative; }
.video-grid { flex: 1; display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 15px; padding: 15px; background: #000; overflow-y: auto; align-content: center; }
.video-container { position: relative; border-radius: 12px; overflow: hidden; background: #1e293b; aspect-ratio: 16/9; border: 2px solid var(--glass-border); }
.video-container video { width: 100%; height: 100%; object-fit: cover; transform: scaleX(-1); }
.name-tag { position: absolute; bottom: 10px; left: 10px; background: rgba(0,0,0,0.7); padding: 4px 10px; border-radius: 6px; font-size: 0.85rem; font-weight: bold; border: 1px solid rgba(255,255,255,0.1); }

/* Slide Controller Layer */
.presentation-layer { position: absolute; inset: 15px; right: 335px; z-index: 50; display: flex; flex-direction: column; background: rgba(15, 23, 42, 0.95); border-radius: 12px; border: 1px solid var(--glass-border); padding: 10px; }
.pres-toolbar { display: flex; justify-content: space-between; margin-bottom: 10px; background: rgba(255,255,255,0.05); padding: 10px; border-radius: 8px; }

/* Sidebar */
.meeting-sidebar { width: 320px; background: var(--glass-bg); border-left: 1px solid var(--glass-border); display: flex; flex-direction: column; z-index: 10; }
.chat-msg { background: rgba(255,255,255,0.05); padding: 10px; border-radius: 8px; font-size: 0.9rem; border: 1px solid rgba(255,255,255,0.05); }

/* Locked UI */
.pro-locked { opacity: 0.4; pointer-events: none; position: relative; }
.pro-locked::after { content: 'PRO'; position: absolute; top: -5px; right: -5px; background: var(--warning); color: black; font-size: 0.6rem; font-weight: bold; padding: 2px 4px; border-radius: 4px; }