:root {
    --color-primary: #4338ca;
    --color-primary-dark: #3730a3;
    --color-bg: #f4f5f9;
    --color-card: #ffffff;
    --color-text: #1f2330;
    --color-muted: #6b7280;
    --color-border: #e2e4ea;
    --color-error-bg: #fef2f2;
    --color-error-text: #b91c1c;
    --radius: 12px;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: linear-gradient(135deg, #eef0fb 0%, #f4f5f9 100%);
    color: var(--color-text);
    min-height: 100vh;
}

.auth-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.auth-card {
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: 0 10px 30px rgba(31, 35, 48, 0.08);
    padding: 40px 36px;
    width: 100%;
    max-width: 400px;
}

.auth-header h1 {
    margin: 0 0 4px;
    font-size: 22px;
    font-weight: 700;
}

.auth-header p {
    margin: 0 0 24px;
    color: var(--color-muted);
    font-size: 14px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--color-text);
}

.form-group input {
    width: 100%;
    padding: 11px 14px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.15s ease;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(67, 56, 202, 0.12);
}

.btn-primary {
    width: 100%;
    padding: 12px 14px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s ease;
    text-decoration: none;
}

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

.alert {
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 13px;
    margin-bottom: 18px;
}

.alert-error {
    background: var(--color-error-bg);
    color: var(--color-error-text);
}

.auth-footer {
    margin-top: 20px;
    font-size: 12px;
    color: var(--color-muted);
    text-align: center;
}