:root {
            --bg-deep: #080d1a;
            --bg-card: rgba(15, 23, 42, 0.78);
            --border-glass: rgba(255, 255, 255, 0.08);
            --border-glow: rgba(6, 182, 212, 0.35);
            --accent-cyan: #06b6d4;
            --accent-blue: #3b82f6;
            --text-main: #f8fafc;
            --text-muted: #94a3b8;
        }

        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Plus Jakarta Sans', sans-serif;
            background: radial-gradient(circle at 50% 10%, #1e3a8a 0%, #0b1120 40%, #050811 100%);
            min-height: 100vh;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 20px;
            color: var(--text-main);
        }
        
        .login-container {
            background: var(--bg-card);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid var(--border-glow);
            border-radius: 20px;
            box-shadow: 0 25px 60px -15px rgba(0, 0, 0, 0.8), 0 0 35px rgba(6, 182, 212, 0.15);
            overflow: hidden;
            max-width: 420px;
            width: 100%;
            animation: cardAppear 0.5s ease-out;
        }

        @keyframes cardAppear {
            from { opacity: 0; transform: translateY(15px) scale(0.98); }
            to { opacity: 1; transform: translateY(0) scale(1); }
        }
        
        .login-header {
            padding: 34px 30px 24px;
            text-align: center;
            border-bottom: 1px solid var(--border-glass);
            position: relative;
        }

        .login-icon {
            width: 52px;
            height: 52px;
            background: linear-gradient(135deg, #06b6d4 0%, #3b82f6 50%, #8b5cf6 100%);
            border-radius: 14px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-size: 26px;
            margin-bottom: 12px;
            box-shadow: 0 0 25px rgba(6, 182, 212, 0.5);
        }
        
        .login-header h1 {
            font-size: 22px;
            font-weight: 800;
            background: linear-gradient(90deg, #ffffff 0%, #a5f3fc 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }
        
        .login-header p {
            color: var(--text-muted);
            font-size: 13px;
        }
        
        .login-body {
            padding: 28px 30px 34px;
        }
        
        .tab-buttons {
            display: flex;
            margin-bottom: 24px;
            border-radius: 10px;
            overflow: hidden;
            background: rgba(11, 17, 32, 0.6);
            border: 1px solid var(--border-glass);
            padding: 4px;
            gap: 4px;
        }
        
        .tab-btn {
            flex: 1;
            padding: 9px;
            border: none;
            background: transparent;
            color: var(--text-muted);
            cursor: pointer;
            font-weight: 700;
            font-size: 13px;
            border-radius: 7px;
            transition: all 0.25s ease;
            font-family: inherit;
        }
        
        .tab-btn.active {
            background: linear-gradient(135deg, rgba(6, 182, 212, 0.25) 0%, rgba(59, 130, 246, 0.35) 100%);
            color: white;
            box-shadow: 0 2px 10px rgba(6, 182, 212, 0.3);
            border: 1px solid rgba(6, 182, 212, 0.4);
        }
        
        .form-group {
            margin-bottom: 18px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 6px;
            color: var(--text-muted);
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        
        .form-group input {
            width: 100%;
            padding: 12px 14px;
            background: rgba(11, 17, 32, 0.7);
            border: 1px solid var(--border-glass);
            border-radius: 10px;
            font-size: 14px;
            color: white;
            outline: none;
            transition: all 0.25s;
            font-family: inherit;
        }
        
        .form-group input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 15px rgba(6, 182, 212, 0.3);
            background: rgba(15, 23, 42, 0.95);
        }
        
        .login-btn {
            width: 100%;
            padding: 13px;
            background: linear-gradient(135deg, #06b6d4 0%, #0284c7 100%);
            color: white;
            border: none;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 700;
            cursor: pointer;
            box-shadow: 0 4px 18px rgba(6, 182, 212, 0.4);
            transition: all 0.25s ease;
            font-family: inherit;
            margin-top: 6px;
        }
        
        .login-btn:hover {
            box-shadow: 0 6px 24px rgba(6, 182, 212, 0.6);
            transform: translateY(-1px);
        }

        .login-btn:active {
            transform: translateY(0);
        }
        
        .hidden {
            display: none;
        }
        
        .error-message {
            color: #fda4af;
            background: rgba(244, 63, 94, 0.15);
            border: 1px solid rgba(244, 63, 94, 0.35);
            padding: 10px;
            border-radius: 8px;
            font-size: 12px;
            margin-top: 14px;
            text-align: center;
            display: none;
            animation: fadeIn 0.3s;
        }

        @keyframes fadeIn {
            from { opacity: 0; }
            to { opacity: 1; }
        }