:root {
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-success: #16a34a;
    --color-error: #dc2626;
    --color-warning: #d97706;
    --color-bg: #f8fafc;
    --color-surface: #ffffff;
    --color-text: #1e293b;
    --color-text-muted: #64748b;
    --color-border: #e2e8f0;
    --radius: 0.5rem;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 640px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

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

.header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-primary);
}

.subtitle {
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* Form */
.deploy-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-section {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.form-section h2 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.form-group input {
    width: 100%;
    padding: 0.625rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    font-size: 0.95rem;
    transition: border-color 0.15s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input.invalid {
    border-color: var(--color-error);
}

.hint {
    display: block;
    margin-top: 0.25rem;
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.optional {
    font-weight: 400;
    color: var(--color-text-muted);
    font-size: 0.85em;
}

.section-desc {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

/* Instructions accordion */
.instructions {
    margin-top: 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
    font-size: 0.85rem;
}

.instructions summary {
    cursor: pointer;
    font-weight: 500;
    color: var(--color-primary);
}

.instructions ol {
    margin: 0.5rem 0 0.5rem 1.25rem;
}

.instructions li {
    margin-bottom: 0.25rem;
}

.security-note {
    color: var(--color-success);
    font-weight: 500;
    font-size: 0.8rem;
}

/* Buttons */
.form-actions {
    text-align: center;
}

.btn-primary {
    display: inline-block;
    padding: 0.75rem 2.5rem;
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.15s;
}

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

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: var(--color-surface);
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 0.375rem;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
}

.btn-secondary:hover {
    background: rgba(37, 99, 235, 0.05);
}

/* Error message */
.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--color-error);
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.9rem;
    margin-top: 1rem;
}

/* Progress panel */
.progress-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
}

.progress-panel h2 {
    text-align: center;
    margin-bottom: 1.5rem;
}

.progress-steps {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.step {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
    color: var(--color-text-muted);
}

.step.active {
    color: var(--color-primary);
    font-weight: 500;
}

.step.done {
    color: var(--color-success);
}

.step.failed {
    color: var(--color-error);
}

.step-icon {
    width: 1.5rem;
    height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1rem;
}

.step-icon::before {
    content: '\25CB'; /* empty circle */
}

.step.done .step-icon::before {
    content: '\2713'; /* checkmark */
}

.step.active .step-icon::before {
    content: '';
}

.step.active .step-icon {
    position: relative;
}

.step.active .step-icon::after {
    content: '';
    width: 1rem;
    height: 1rem;
    border: 2px solid var(--color-primary);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.step.failed .step-icon::before {
    content: '\2717'; /* X mark */
}

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

.status-message {
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

/* DNS check */
.dns-check {
    margin-top: 0.5rem;
    padding: 0.75rem;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 0.375rem;
    font-size: 0.85rem;
}

.dns-check code {
    display: block;
    margin: 0.5rem 0;
    padding: 0.5rem;
    background: white;
    border-radius: 0.25rem;
    font-family: monospace;
}

/* Success / Failure panels */
.success-panel {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    border-radius: var(--radius);
}

.success-panel h3 {
    color: var(--color-success);
    margin-bottom: 0.75rem;
}

.success-panel a {
    color: var(--color-primary);
    font-weight: 500;
}

.important-steps {
    margin-top: 1rem;
    padding: 1rem;
    background: #fffbeb;
    border: 1px solid #fde68a;
    border-radius: 0.375rem;
}

.important-steps h4 {
    color: var(--color-warning);
    margin-bottom: 0.5rem;
}

.important-steps ol {
    margin-left: 1.25rem;
}

.important-steps li {
    margin-bottom: 0.25rem;
    font-size: 0.9rem;
}

.important-steps code {
    background: #fef3c7;
    padding: 0.125rem 0.375rem;
    border-radius: 0.25rem;
    font-size: 0.85em;
}

.failure-panel {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: #fef2f2;
    border: 1px solid #fecaca;
    border-radius: var(--radius);
}

.failure-panel h3 {
    color: var(--color-error);
    margin-bottom: 0.5rem;
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 1rem 0.75rem;
    }

    .form-section {
        padding: 1rem;
    }

    .btn-primary {
        width: 100%;
    }
}