:root {
    --brand-primary: #2563eb;
    --brand-primary-hover: #1d4ed8;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --danger: #ef4444;
    --warning: #f59e0b;
}

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

body {
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--gray-50);
    color: var(--gray-700);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.error-main {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 60px 24px;
}

.error-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 4px 16px rgba(0, 0, 0, 0.04);
    padding: 48px 40px;
    max-width: 520px;
    width: 100%;
    text-align: center;
}

.error-status {
    font-size: 72px;
    font-weight: 800;
    color: var(--gray-300);
    line-height: 1;
    margin-bottom: 16px;
}

.error-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.error-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-800);
    margin-bottom: 12px;
}

.error-message {
    font-size: 15px;
    color: var(--gray-500);
    line-height: 1.6;
    margin-bottom: 8px;
}

.error-submessage {
    font-size: 13px;
    color: var(--gray-400);
    margin-bottom: 32px;
}

.error-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

.error-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
    border: none;
}

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

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

.error-btn-secondary {
    background: var(--gray-100);
    color: var(--gray-600);
}

.error-btn-secondary:hover {
    background: var(--gray-300);
}

@media (max-width: 576px) {
    .error-card {
        padding: 36px 24px;
        border-radius: 12px;
    }

    .error-status {
        font-size: 56px;
    }

    .error-title {
        font-size: 18px;
    }

    .error-actions {
        flex-direction: column;
    }

    .error-btn {
        justify-content: center;
    }
}