:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --secondary: #ec4899;
    --bg-start: #0f172a;
    --bg-end: #1e1b4b;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --success: #10b981;
    --error: #ef4444;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Outfit', sans-serif;
    background: linear-gradient(135deg, var(--bg-start), var(--bg-end));
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.bg-gradient {
    display: flex;
    justify-content: center;
    align-items: center;
}

a {
    color: var(--primary);
    text-decoration: none;
}

.auth-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.wrapper {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    padding: 2rem;
}

/* Typography */
.logo {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 0.5rem;
    letter-spacing: -1px;
}

.highlight {
    color: var(--primary);
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 2rem;
    background: rgba(0,0,0,0.2);
    border-radius: 12px;
    padding: 0.25rem;
}

.tab {
    flex: 1;
    padding: 10px;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.3s ease;
}

.tab.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
}

/* Forms */
.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.input-group input, .input-group select, .input-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    color: #fff;
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    border-color: var(--primary);
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    font-family: inherit;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn:active {
    transform: scale(0.98);
}

.primary-btn {
    background: var(--primary);
    color: #fff;
}

.primary-btn:hover {
    background: var(--primary-hover);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.3);
}

.secondary-btn {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.secondary-btn:hover {
    background: rgba(255,255,255,0.2);
}

.full-width {
    width: 100%;
}

.alert {
    padding: 12px 16px;
    border-radius: 12px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert.error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid var(--error);
    color: #fca5a5;
}

.alert.success {
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid var(--success);
    color: #6ee7b7;
}

/* Dashboard UI */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    background: rgba(0,0,0,0.2);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--glass-border);
}

.navbar .user-info {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.test-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 16px;
    padding: 1.5rem;
    transition: transform 0.3s;
    display: flex;
    flex-direction: column;
}

.test-card:hover {
    transform: translateY(-5px);
    border-color: rgba(255,255,255,0.2);
}

.test-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.test-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.test-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.status-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 10px;
}
.status-badge.pending { background: rgba(234, 179, 8, 0.2); color: #fef08a; }
.status-badge.ready { background: rgba(16, 185, 129, 0.2); color: #6ee7b7; }

/* Simulation Area */
.sim-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.timer {
    font-size: 2rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    color: var(--secondary);
}

.question-block {
    margin-bottom: 2rem;
    background: rgba(0,0,0,0.2);
    padding: 1.5rem;
    border-radius: 12px;
}

.question-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.options label {
    display: block;
    margin-bottom: 0.5rem;
    padding: 10px 15px;
    background: rgba(255,255,255,0.05);
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.options label:hover {
    background: rgba(255,255,255,0.1);
}

@media (max-width: 768px) {
    .wrapper { padding: 1rem; }
    .navbar { padding: 1rem; flex-direction: column; gap: 1rem; }
    .grid { grid-template-columns: 1fr; }
}

/* Loader */
.loader-container {
    display: none;
    position: fixed;
    top: 0; left: 0; right:0; bottom:0;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(5px);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}
.loader {
    border: 4px solid rgba(255,255,255,0.1);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-bottom: 1rem;
}
@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}