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

:root {
    --bg: #f5f5f7;
    --card-bg: #fff;
    --border: #d1d5db;
    --border-light: #e5e7eb;
    --text: #111827;
    --text-secondary: #6b7280;
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --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;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
}

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

main {
    max-width: 640px;
    margin: 0 auto;
    padding: 2rem 1.5rem 4rem;
}

/* Hero header */
.hero {
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-light);
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.hero-accent {
    color: var(--primary);
    font-weight: 600;
}

.beta-pill {
    font-size: 0.55rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--error-text);
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    vertical-align: middle;
    position: relative;
    top: -0.15rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-top: 0.25rem;
}

h2 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text);
}

/* Step navigation */
.step-nav {
    margin-bottom: 1.5rem;
}

.step-nav ol {
    display: flex;
    list-style: none;
    gap: 0;
    counter-reset: step;
}

.step-nav li {
    flex: 1;
    text-align: center;
    padding: 0.5rem 0;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    counter-increment: step;
}

.step-nav li::before {
    content: counter(step);
    display: block;
    width: 1.6rem;
    height: 1.6rem;
    line-height: 1.6rem;
    margin: 0 auto 0.3rem;
    border-radius: 50%;
    background: var(--border-light);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
}

.step-nav li.active::before {
    background: var(--primary);
    color: #fff;
}

.step-nav li.active {
    color: var(--primary);
    font-weight: 600;
}

.step-nav li.done::before {
    background: var(--success-text);
    color: #fff;
    content: "\2713";
}

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

/* Connector lines between steps */
.step-nav li + li::after {
    content: '';
    position: absolute;
    top: 1.3rem;
    right: 50%;
    width: 100%;
    height: 2px;
    background: var(--border-light);
    z-index: -1;
}

.step-nav li.done + li::after,
.step-nav li.done + li.active::after {
    background: var(--success-text);
}

/* Steps */
.step {
    margin-bottom: 1rem;
}

.step p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-size: 0.93rem;
    line-height: 1.6;
}

/* Step action buttons (back/next) */
.step-actions {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

.step-actions .primary:first-child {
    margin-left: auto;
}

/* Buttons */
button {
    font-size: 0.9rem;
    padding: 0.55rem 1.25rem;
    border-radius: 8px;
    border: 1px solid var(--border);
    cursor: pointer;
    font-weight: 500;
    transition: all 0.15s ease;
}

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

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

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

button.secondary:hover {
    background: #f9fafb;
    border-color: #9ca3af;
}

button:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    box-shadow: none;
}

button.btn-success,
button.btn-success:hover {
    background: var(--success-text);
    border-color: var(--success-text);
    color: #fff;
    cursor: default;
    opacity: 0.7;
}

/* Cards */
.info-card {
    background: var(--card-bg);
    border: 1px solid var(--border-light);
    border-radius: 10px;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
}

.info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--border-light);
}

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

.info-row .label {
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.info-row .value {
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.88rem;
}

/* Status banners */
.warning {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-size: 0.88rem;
    line-height: 1.5;
}

.warning a {
    color: inherit;
}

.error {
    background: var(--error-bg);
    border: 1px solid var(--error-border);
    color: var(--error-text);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.88rem;
}

.status-supported {
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    padding: 0.65rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.88rem;
}

.status-unsupported {
    background: var(--warning-bg);
    border: 1px solid var(--warning-border);
    color: var(--warning-text);
    padding: 0.65rem 1rem;
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.88rem;
}

/* Scrollable patch container */
.patch-container-scroll {
    max-height: 50vh;
    overflow-y: auto;
    border: 1px solid var(--border);
    border-radius: 5px;
}

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

.patch-file-section:last-child {
    border-bottom: none;
}

.patch-file-section summary {
    padding: 0.6rem 0.75rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    font-weight: 500;
    font-size: 0.93rem;
    user-select: none;
    transition: background 0.1s;
    list-style: none;
}

.patch-file-section summary::-webkit-details-marker {
    display: none;
}

.patch-file-section summary::before {
    content: "\203A";
    display: inline-block;
    width: 1rem;
    margin-right: 0.35rem;
    flex-shrink: 0;
    text-align: center;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    transition: transform 0.15s ease;
}

.patch-file-section[open] summary::before {
    transform: rotate(90deg) translateX(0.1rem);
}

.patch-file-section summary .patch-count {
    margin-left: auto;
}

.patch-file-section summary:hover {
    background: #f9fafb;
}

.patch-file-section[open] summary {
    border-bottom: 1px solid var(--border-light);
}

.patch-count {
    font-weight: 400;
    font-size: 0.8rem;
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.15rem 0.6rem;
    border-radius: 10px;
}

.patch-list {
    padding: 0.25rem 0;
}

.patch-item {
    padding: 0.4rem 1rem;
}

.patch-item + .patch-item {
    border-top: 1px solid var(--border-light);
}

.patch-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.85rem;
}

.patch-header input {
    flex-shrink: 0;
    accent-color: var(--primary);
}

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

.patch-name-none {
    color: var(--text-secondary);
}

.patch-desc-toggle {
    flex-shrink: 0;
    background: none;
    border: none;
    padding: 0 0.3rem;
    font-size: 0.7rem;
    color: var(--text-secondary);
    cursor: pointer;
    box-shadow: none;
    opacity: 0.6;
    transition: opacity 0.1s;
}

.patch-desc-toggle:hover {
    opacity: 1;
}

/* Visual grouping for mutually exclusive patches */
.patch-group {
    background: #f8fafc;
    border-left: 3px solid var(--primary);
    margin: 0.35rem 0.5rem;
    border-radius: 0 6px 6px 0;
}

.patch-group .patch-item {
    padding: 0.4rem 0.75rem;
}

.patch-group-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    color: var(--primary);
    padding: 0.45rem 0.75rem 0;
}

.step .patch-description {
    margin-top: 0.3rem;
    margin-left: 1.6rem;
    margin-bottom: 0;
    font-size: 0.72rem;
    color: var(--text-secondary);
    white-space: pre-line;
    line-height: 1.4;
    padding: 0.25rem 0;
}

.patch-description[hidden] {
    display: none;
}

/* Firmware input */
input[type="file"] {
    display: block;
    margin-bottom: 1rem;
    font-size: 0.88rem;
}

#build-actions {
    display: flex;
    justify-content: space-between;
    gap: 0.75rem;
    margin-top: 1.25rem;
}

/* Build header (spinner + progress text) */
.build-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.25rem;
}

.build-header p {
    margin-bottom: 0;
    font-weight: 500;
    color: var(--text);
}

/* Spinner */
.spinner {
    width: 22px;
    height: 22px;
    border: 2.5px solid var(--border-light);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    flex-shrink: 0;
}

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

/* Build log terminal */
.build-log {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: #0f172a;
    color: #94a3b8;
    border-radius: 6px;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.73rem;
    white-space: pre-wrap;
    height: calc(10 * 1.5em + 1.5rem);
    overflow-y: auto;
    line-height: 1.5;
}

/* Collapsible log on install step */
.log-details {
    margin-top: 0.5rem;
    margin-bottom: 0.25rem;
}

.log-details summary {
    font-size: 0.83rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.25rem 0;
}

.log-details summary:hover {
    color: var(--text);
}

/* Done screen log is shorter */
.done-log {
    height: calc(7 * 1.5em + 1.5rem);
}

.step .hint {
    margin-top: 1rem;
    padding: 0.65rem 1rem;
    background: var(--success-bg);
    border: 1px solid var(--success-border);
    color: var(--success-text);
    border-radius: 8px;
    font-size: 0.88rem;
}

.error-log {
    margin-top: 0.75rem;
    padding: 0.75rem 1rem;
    background: #0f172a;
    color: #e2e8f0;
    border-radius: 6px;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.78rem;
    white-space: pre-wrap;
    max-height: 300px;
    overflow-y: auto;
}

.step a {
    color: var(--primary);
    text-decoration: none;
}

.step a:hover {
    text-decoration: underline;
}

.step .fallback-hint {
    margin-top: 0.5rem;
    margin-bottom: 1rem;
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

select + .fallback-hint {
    margin-top: -0.5rem;
}

/* Install summary */
.step .install-summary {
    font-size: 0.93rem;
    color: var(--text);
    line-height: 1.6;
    margin-bottom: 0.5rem;
}

/* Install instructions */
.install-instructions {
    margin-top: 1rem;
}

.install-instructions .warning {
    margin-bottom: 0.75rem;
}

.step .install-instructions .hint {
    margin-top: 0;
}

.install-steps {
    margin: 0.5rem 0 0 1.25rem;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.install-steps li {
    padding: 0.1rem 0;
}

.step .info-banner {
    background: var(--primary-light);
    border: 1px solid #bfdbfe;
    color: #1e40af;
    padding: 0.6rem 1rem;
    border-radius: 8px;
    font-size: 0.83rem;
    margin-bottom: 1rem;
}

/* Selected patches summary on build step */
.selected-patches-list {
    margin: 0 0 0.75rem 1.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.selected-patches-list li {
    padding: 0.05rem 0;
}

#firmware-download-url {
    display: inline-block;
    margin: 0.4rem 0;
    padding: 0.3rem 0.6rem;
    font-size: 0.7rem;
    word-break: break-all;
    color: #64748b;
    background: #f1f5f9;
    border: 1px solid #e2e8f0;
    border-radius: 4px;
}

#firmware-verify-notice {
    font-size: 12px;
}

[hidden] {
    display: none !important;
}

select {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 0.93rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--card-bg);
    color: var(--text);
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2rem;
}

select:focus,
button:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Footer */
.site-footer {
    max-width: 640px;
    margin: 0 auto;
    padding: 1.5rem 1.5rem 2rem;
    border-top: 1px solid var(--border-light);
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.site-footer a {
    color: var(--text-secondary);
    text-decoration: underline;
}

.site-footer a:hover {
    color: var(--text);
}

/* Modal dialog */
.modal {
    border: none;
    border-radius: 12px;
    padding: 0;
    max-width: 560px;
    width: calc(100% - 2rem);
    max-height: 80vh;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin: 0;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15), 0 0 0 1px rgba(0, 0, 0, 0.05);
}

.modal::backdrop {
    background: rgba(0, 0, 0, 0.4);
}

.modal-content {
    display: flex;
    flex-direction: column;
    max-height: 80vh;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-light);
    flex-shrink: 0;
}

.modal-header h2 {
    margin-bottom: 0;
    font-size: 1rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.4rem;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0 0.25rem;
    line-height: 1;
    box-shadow: none;
}

.modal-close:hover {
    color: var(--text);
}

.modal-body {
    padding: 1.25rem;
    overflow-y: auto;
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.modal-body h3 {
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    margin-top: 1.25rem;
    margin-bottom: 0.5rem;
}

.modal-body p {
    margin-bottom: 0.75rem;
}

.modal-body ol {
    margin: 0 0 0.75rem 1.25rem;
}

.modal-body li {
    margin-bottom: 0.5rem;
}

.modal-body a {
    color: var(--primary);
    text-decoration: none;
}

.modal-body a:hover {
    text-decoration: underline;
}

.modal-body code {
    font-size: 0.8rem;
    background: #f1f5f9;
    padding: 0.1rem 0.35rem;
    border-radius: 3px;
}