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

:root {
    --bg: #fafafa;
    --card-bg: #fff;
    --border: #e0e0e0;
    --text: #1a1a1a;
    --text-secondary: #555;
    --primary: #1a6ed8;
    --primary-hover: #1558b0;
    --error-bg: #fef2f2;
    --error-border: #fca5a5;
    --error-text: #991b1b;
    --warning-bg: #fffbeb;
    --warning-border: #fcd34d;
    --warning-text: #92400e;
    --success-bg: #f0fdf4;
    --success-border: #86efac;
    --success-text: #166534;
}

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

main {
    max-width: 600px;
    margin: 3rem auto;
    padding: 0 1.5rem;
}

h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.step {
    margin-bottom: 2rem;
}

.step p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

button {
    font-size: 0.95rem;
    padding: 0.6rem 1.4rem;
    border-radius: 6px;
    border: 1px solid var(--border);
    cursor: pointer;
    font-weight: 500;
    transition: background 0.15s, border-color 0.15s;
}

button.primary {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

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

button.secondary {
    background: var(--card-bg);
    color: var(--text);
}

button.secondary:hover {
    background: #f0f0f0;
}

.info-card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--border);
}

.info-row:last-child {
    border-bottom: none;
}

.info-row .label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.info-row .value {
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.9rem;
}

.warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.9rem;
    line-height: 1.5;
}

.warning a {
    color: inherit;
}

.error {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
    padding: 1rem 1.25rem;
    border-radius: 8px;
    font-size: 0.9rem;
}

.status-supported {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.status-unsupported {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

/* Patch file sections */
.patch-file-section {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    margin-bottom: 0.75rem;
}

.patch-file-section summary {
    padding: 0.75rem 1rem;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 500;
    font-size: 0.95rem;
    user-select: none;
}

.patch-file-section summary:hover {
    background: #f5f5f5;
}

.patch-count {
    font-weight: 400;
    color: var(--text-secondary);
    font-size: 0.85rem;
}

.patch-list {
    border-top: 1px solid var(--border);
    padding: 0.5rem 0;
}

.patch-item {
    padding: 0.5rem 1rem;
}

.patch-item + .patch-item {
    border-top: 1px solid #f0f0f0;
}

.patch-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
}

.patch-header input {
    flex-shrink: 0;
}

.patch-name {
    font-weight: 500;
}

.patch-group-badge {
    font-size: 0.75rem;
    background: #e8e8e8;
    color: var(--text-secondary);
    padding: 0.1rem 0.5rem;
    border-radius: 4px;
    margin-left: auto;
    flex-shrink: 0;
}

.patch-description {
    margin-top: 0.35rem;
    margin-left: 1.6rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    white-space: pre-line;
    line-height: 1.4;
}

/* Firmware input */
input[type="file"] {
    display: block;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

#build-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: 1rem;
}

/* Spinner */
.spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.build-log {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: #1a1a1a;
    color: #a0a0a0;
    border-radius: 6px;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.75rem;
    white-space: pre-wrap;
    height: calc(10 * 1.5em + 1.5rem);
    overflow-y: auto;
    line-height: 1.5;
}

.hint {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    border-radius: 8px;
    font-size: 0.9rem;
}

.error-log {
    margin-top: 0.75rem;
    padding: 0.75rem;
    background: #1a1a1a;
    color: #e0e0e0;
    border-radius: 6px;
    font-family: "SF Mono", "Fira Code", monospace;
    font-size: 0.8rem;
    white-space: pre-wrap;
    max-height: 300px;
    overflow-y: auto;
}

.step a {
    color: var(--primary);
}

.fallback-hint {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.info-banner {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1e40af;
    padding: 0.65rem 1rem;
    border-radius: 8px;
    font-size: 0.85rem;
    margin-bottom: 1rem;
}

#firmware-download-url {
    font-size: 0.8rem;
    word-break: break-all;
    color: var(--text-secondary);
}

select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--card-bg);
    color: var(--text);
    margin-bottom: 1rem;
}