:root {
    --primary: #0070f3;
    --primary-hover: #0051a8;
    --bg-dark: #121212;
    --card-bg: rgba(30, 30, 30, 0.7);
    --border: rgba(255, 255, 255, 0.1);
    --text: #eaeaea;
    --text-muted: #888;
    --error: #ff4d4f;
    --success: #28a745;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
}

body {
    background-color: var(--bg-dark);
    color: var(--text);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background-image: radial-gradient(circle at top right, rgba(0,112,243,0.15), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(0,112,243,0.1), transparent 40%);
}

.container {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
}

.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.header p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 0.85rem 1rem;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text);
    font-size: 1rem;
    transition: all 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(0, 0, 0, 0.4);
}

.btn {
    width: 100%;
    padding: 0.85rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s ease, transform 0.1s ease;
}

.btn:hover {
    background: var(--primary-hover);
}

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

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
}

.alert-error {
    background: rgba(255, 77, 79, 0.1);
    color: var(--error);
    border: 1px solid rgba(255, 77, 79, 0.2);
}

.alert-success {
    background: rgba(40, 167, 69, 0.1);
    color: var(--success);
    border: 1px solid rgba(40, 167, 69, 0.2);
}

.data-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-bottom: 2rem;
}

.data-item {
    background: rgba(0, 0, 0, 0.2);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.data-item span {
    display: block;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-item strong {
    font-size: 1.1rem;
    font-weight: 500;
}