:root {
    --primary: #4361ee;
    --primary-hover: #3a56d4;
    --primary-light: #eef1ff;
    --success: #2a9d8f;
    --success-light: #e8f5f3;
    --warning: #e9c46a;
    --warning-dark: #d4a84b;
    --danger: #e76f51;
    --danger-light: #fdf2f0;

    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;

    --radius-sm: 4px;
    --radius: 6px;
    --radius-lg: 8px;

    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--gray-100);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    color: var(--gray-700);
    line-height: 1.5;
}

#app {
    width: 100%;
    max-width: 480px;
}

.card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-200);
}

.card h1 {
    color: var(--gray-800);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 6px;
    text-align: center;
}

.card h2 {
    color: var(--gray-800);
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.card p {
    color: var(--gray-600);
    margin-bottom: 16px;
    font-size: 0.9375rem;
}

.card .info {
    font-size: 0.875rem;
    color: var(--gray-500);
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.header h1 {
    font-size: 1.125rem;
    margin: 0;
    text-align: left;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
}

.user-info span {
    color: var(--gray-600);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    border: none;
    border-radius: var(--radius);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.15s ease;
    text-decoration: none;
    line-height: 1.25;
}

.btn:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

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

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
    border-color: var(--gray-300);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--gray-300);
    color: var(--gray-600);
}

.btn-outline:hover {
    background: var(--gray-50);
    border-color: var(--gray-400);
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn-danger:hover {
    background: #d4634a;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.8125rem;
}

.btn-large {
    padding: 12px 24px;
    font-size: 0.9375rem;
    width: 100%;
}

.btn-duration {
    background: var(--gray-50);
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
    padding: 14px 20px;
    flex: 1;
}

.btn-duration:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
}

/* Duration options */
.duration-options {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.custom-duration {
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.custom-duration label {
    display: block;
    color: var(--gray-500);
    font-size: 0.8125rem;
    margin-bottom: 8px;
}

.custom-duration-input {
    display: flex;
    align-items: center;
    gap: 8px;
}

.custom-duration-input input {
    width: 72px;
    padding: 8px 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--radius);
    font-size: 0.875rem;
    color: var(--gray-700);
}

.custom-duration-input input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.custom-duration-input span {
    color: var(--gray-500);
    font-size: 0.875rem;
}

/* Credentials */
.credentials-card {
    text-align: center;
}

.credentials-warning {
    background: var(--success-light);
    color: var(--success);
    padding: 10px 14px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.8125rem;
    font-weight: 500;
    border: 1px solid rgba(42, 157, 143, 0.2);
}

.credentials-box {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 16px;
    margin-bottom: 20px;
    text-align: left;
    border: 1px solid var(--gray-200);
}

.credential-item {
    margin-bottom: 14px;
}

.credential-item:last-child {
    margin-bottom: 0;
}

.credential-item label {
    display: block;
    color: var(--gray-500);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
    margin-bottom: 4px;
}

.credential-value {
    display: flex;
    align-items: center;
    gap: 8px;
}

.credential-value code {
    flex: 1;
    background: white;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Monaco', 'Consolas', monospace;
    font-size: 0.8125rem;
    color: var(--gray-800);
    border: 1px solid var(--gray-200);
    word-break: break-all;
}

.btn-copy {
    background: var(--gray-100);
    color: var(--gray-600);
    border: 1px solid var(--gray-200);
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.6875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    transition: all 0.15s ease;
}

.btn-copy:hover {
    background: var(--gray-200);
    color: var(--gray-700);
}

.expiration {
    padding-top: 14px;
    border-top: 1px solid var(--gray-200);
    margin-top: 14px;
}

.expiration span {
    color: var(--gray-700);
    font-weight: 500;
    font-size: 0.875rem;
}

/* Action buttons */
.action-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

/* Loading */
.loading-card {
    text-align: center;
    padding: 40px 28px;
}

.spinner {
    width: 36px;
    height: 36px;
    border: 3px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto 14px;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Error */
.error-card {
    text-align: center;
}

.error-card h2 {
    color: var(--danger);
}

/* Warning card */
.warning-card {
    border-left: 3px solid var(--warning-dark);
    background: linear-gradient(to right, rgba(233, 196, 106, 0.08), transparent);
}

.warning-card h3 {
    color: var(--gray-800);
    margin-bottom: 10px;
    font-size: 1rem;
}

/* Success indicator */
.success-badge {
    display: inline-block;
    background: var(--success-light);
    color: var(--success);
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 500;
    margin-bottom: 14px;
    border: 1px solid rgba(42, 157, 143, 0.2);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gray-800);
    color: white;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 0.8125rem;
    font-weight: 500;
    animation: fadeInUp 0.2s ease;
    z-index: 1000;
    box-shadow: var(--shadow-lg);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate(-50%, 8px);
    }
    to {
        opacity: 1;
        transform: translate(-50%, 0);
    }
}

/* Login card specific */
.login-card {
    text-align: center;
    padding: 36px 28px;
}

.login-card h1 {
    margin-bottom: 8px;
}

.login-card > p:first-of-type {
    color: var(--gray-500);
    margin-bottom: 4px;
}

.login-card .info {
    margin-bottom: 24px;
    color: var(--gray-400);
}

/* Responsive */
@media (max-width: 480px) {
    body {
        padding: 16px;
    }

    .card {
        padding: 20px;
    }

    .duration-options {
        flex-direction: column;
    }

    .header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .action-buttons {
        flex-direction: column;
    }

    .action-buttons .btn {
        width: 100%;
    }
}