:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --bg-light: #f8fafc;
    --bg-gradient: linear-gradient(135deg, #e0e7ff 0%, #f8fafc 100%);
    --card-radius: 18px;
    --shadow: 0 4px 24px rgba(30,41,59,0.07), 0 1.5px 6px rgba(102,126,234,0.06);
    --input-bg: #f8fafc;
    --input-focus: #fff;
    --input-border: #e2e8f0;
    --input-focus-border: #667eea;
    --text-main: #334155;
    --text-muted: #64748b;
    --font: 'Inter', 'Segoe UI', Arial, sans-serif;
}

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 0;
}

.auth-card {
    background: #fff;
    border-radius: var(--card-radius);
    box-shadow: var(--shadow);
    max-width: 500px;
    width: 100%;
    overflow: hidden;
    margin: 0 16px;
    display: flex;
    flex-direction: column;
}

.auth-card-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    border-radius: var(--card-radius) var(--card-radius) 0 0;
    padding: 32px 0 20px 0;
    text-align: center;
    box-shadow: 0 2px 8px rgba(102,126,234,0.08);
}

.auth-logo {
    display: flex;
    justify-content: center;
    margin-bottom: 12px;
}
.auth-logo img {
    width: 60px;
    height: 60px;
    border-radius: 14px;
    box-shadow: 0 2px 8px rgba(102,126,234,0.15);
    background: #fff;
}

.auth-card-header h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: #fff;
    letter-spacing: 0.5px;
}

.auth-card-header .auth-subtitle {
    color: #e0e7ff;
    font-size: 1.08rem;
    margin-bottom: 0;
}

.auth-form {
    display: flex;
    flex-direction: column;
    padding: 28px 32px 24px 32px;
    background: #fff;
}

.form-group {
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
}
.form-group label {
    color: #475569;
    font-size: 1rem;
    margin-bottom: 6px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}
.form-group .icon {
    font-size: 1.1em;
    opacity: 0.85;
}
.form-group input {
    padding: 11px 13px;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    font-size: 1rem;
    background: var(--input-bg);
    color: var(--text-main);
    transition: border-color 0.2s, background 0.2s;
}
.form-group input:focus {
    border-color: var(--input-focus-border);
    outline: none;
    background: var(--input-focus);
}

.btn-primary {
    background: linear-gradient(90deg, var(--primary) 0%, var(--secondary) 100%);
    color: #fff;
    border: none;
    border-radius: 10px;
    padding: 13px 0;
    font-size: 1.12rem;
    font-weight: 600;
    cursor: pointer;
    margin-top: 8px;
    transition: background 0.2s, box-shadow 0.2s, transform 0.1s;
    box-shadow: 0 4px 16px rgba(102,126,234,0.10);
    letter-spacing: 0.5px;
    width: 100%;
}
.btn-primary:hover, .btn-primary:focus {
    background: linear-gradient(90deg, var(--secondary) 0%, var(--primary) 100%);
}
.btn-primary:active {
    transform: scale(0.98);
}

.auth-links {
    text-align: center;
    margin: 22px 0 10px 0;
    color: var(--text-muted);
    font-size: 1rem;
}
.auth-links a {
    color: var(--primary);
    font-weight: 500;
    text-decoration: none;
    transition: color 0.2s;
}
.auth-links a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 500px) {
    .auth-card {
        max-width: 98vw;
        margin: 0 4px;
    }
    .auth-card-header {
        padding: 22px 0 12px 0;
    }
    .auth-form {
        padding: 18px 8px 14px 8px;
    }
}