/* ==========================================================================
   Cloudflare Dashboard (Kumo) style — AbeFlutter support site
   Layout: fixed left sidebar + top bar + content
   Accent: CF orange (#f38020) + CF blue (#0051c3 / #0041a3)
   ========================================================================== */

:root {
    /* Brand & Accent Colors */
    --cf-orange: #f38020;
    --cf-orange-dark: #e57014;
    --cf-blue: #0051c3;
    --cf-blue-hover: #0041a3;
    --cf-blue-light: #eff6ff;
    --cf-blue-border: #bfdbfe;
    --cf-link: #0051c3;

    /* Surfaces & Layout */
    --cf-bg: #f8fafc;
    --cf-surface: #ffffff;
    --cf-border: #e2e8f0;
    --cf-border-strong: #cbd5e1;

    /* Typography */
    --cf-text: #0f172a;
    --cf-text-2: #475569;
    --cf-text-3: #94a3b8;

    /* State colors */
    --cf-hover: #f1f5f9;
    --cf-active-bg: #e2e8f0;
    --cf-green: #15803d;
    --cf-green-bg: #dcfce7;
    --cf-green-border: #bbf7d0;

    /* Geometry */
    --cf-radius-sm: 4px;
    --cf-radius: 6px;
    --cf-radius-lg: 8px;
    --cf-radius-xl: 12px;
    --cf-radius-full: 9999px;

    /* Shadows */
    --cf-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --cf-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);

    /* Dimensions */
    --cf-sidebar-w: 270px;
    --cf-topbar-h: 56px;
    --cf-font: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans JP", "Noto Sans KR", sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
}

body.cf-body {
    margin: 0;
    font-family: var(--cf-font);
    font-size: 14.5px;
    line-height: 1.55;
    color: var(--cf-text);
    background: var(--cf-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--cf-link);
    text-decoration: none;
    transition: color 0.12s ease;
}

a:hover {
    text-decoration: underline;
}

img {
    max-width: 100%;
    height: auto;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--cf-surface);
    padding: 8px 16px;
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius);
    z-index: 100;
}

.skip-link:focus {
    left: 8px;
    top: 8px;
}

/* --------------------------------------------------------------------------
   Sidebar (Cloudflare Navigation Drawer)
   -------------------------------------------------------------------------- */

.cf-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: var(--cf-sidebar-w);
    background: var(--cf-surface);
    border-right: 1px solid var(--cf-border);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    z-index: 40;
}

.cf-sidebar[hidden] {
    display: none;
}

.cf-sidebar__brand {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--cf-border);
    flex-shrink: 0;
    color: inherit;
}

.cf-sidebar__brand:hover {
    text-decoration: none;
    background: var(--cf-hover);
}

.cf-sidebar__brand-mark {
    width: 28px;
    height: 28px;
    border-radius: var(--cf-radius);
    background: var(--cf-orange);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.cf-sidebar__brand-mark img {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: block;
}

.cf-sidebar__brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.25;
    min-width: 0;
}

.cf-sidebar__brand-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--cf-text);
    white-space: nowrap;
}

.cf-sidebar__brand-sub {
    font-size: 11px;
    color: var(--cf-text-3);
    white-space: nowrap;
}

.cf-sidebar__search {
    margin: 12px 14px 4px;
    position: relative;
    flex-shrink: 0;
}

.cf-sidebar__search input {
    width: 100%;
    padding: 7px 10px 7px 32px;
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius);
    font: inherit;
    font-size: 13px;
    color: var(--cf-text);
    background: var(--cf-surface);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.cf-sidebar__search input::placeholder {
    color: var(--cf-text-3);
}

.cf-sidebar__search input:focus {
    outline: none;
    border-color: var(--cf-blue);
    box-shadow: 0 0 0 2px rgba(0, 81, 195, 0.15);
}

.cf-sidebar__search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--cf-text-3);
    pointer-events: none;
    display: inline-flex;
}

.cf-sidebar__search kbd {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-family: inherit;
    font-size: 10.5px;
    font-weight: 500;
    color: var(--cf-text-3);
    background: var(--cf-hover);
    border: 1px solid var(--cf-border);
    border-radius: 4px;
    padding: 1px 5px;
}

.cf-nav {
    padding: 8px 10px 24px;
    flex: 1;
}

.cf-nav__section {
    margin-top: 16px;
    margin-bottom: 4px;
    padding: 0 8px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--cf-text-3);
}

.cf-nav__section:first-child {
    margin-top: 4px;
}

.cf-nav__item {
    display: flex;
    align-items: center;
    gap: 9px;
    padding: 7px 10px;
    margin: 1px 0;
    border-radius: var(--cf-radius);
    color: var(--cf-text-2);
    font-size: 13.5px;
    font-weight: 500;
    line-height: 1.35;
    position: relative;
    transition: background 0.12s ease, color 0.12s ease;
}

.cf-nav__item:hover {
    background: var(--cf-hover);
    color: var(--cf-text);
    text-decoration: none;
}

.cf-nav__item[aria-current="page"],
.cf-nav__item.is-active {
    background: var(--cf-hover);
    color: var(--cf-text);
    font-weight: 600;
}

.cf-nav__item[aria-current="page"]::before,
.cf-nav__item.is-active::before {
    content: "";
    position: absolute;
    left: 0;
    top: 5px;
    bottom: 5px;
    width: 3px;
    background: var(--cf-orange);
    border-radius: 0 2px 2px 0;
}

.cf-nav__item-icon {
    width: 17px;
    height: 17px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--cf-text-3);
    flex-shrink: 0;
}

.cf-nav__item:hover .cf-nav__item-icon,
.cf-nav__item[aria-current="page"] .cf-nav__item-icon,
.cf-nav__item.is-active .cf-nav__item-icon {
    color: var(--cf-orange);
}

.cf-nav__item-text {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.cf-nav__item-desc {
    font-size: 11px;
    font-weight: 400;
    color: var(--cf-text-3);
}

.cf-nav__item-arrow {
    margin-left: auto;
    color: var(--cf-text-3);
    font-size: 13px;
}

/* Sidebar footer (language switch) */
.cf-sidebar__foot {
    border-top: 1px solid var(--cf-border);
    padding: 8px 10px 12px;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Shell + top bar
   -------------------------------------------------------------------------- */

.cf-shell {
    margin-left: var(--cf-sidebar-w);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.cf-topbar {
    position: sticky;
    top: 0;
    height: var(--cf-topbar-h);
    background: rgba(255, 255, 255, 0.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--cf-border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 8px;
    padding: 0 24px;
    z-index: 30;
}

.cf-topbar__left {
    margin-right: auto;
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 0;
}

.cf-topbar__crumb {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--cf-text-2);
    white-space: nowrap;
}

.cf-topbar__crumb strong {
    font-weight: 600;
    color: var(--cf-text);
}

.cf-topbar__divider {
    color: var(--cf-text-3);
    font-size: 12px;
}

.cf-topbar__link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 10px;
    border-radius: var(--cf-radius);
    color: var(--cf-text-2);
    font-size: 13px;
    font-weight: 500;
    transition: background 0.12s ease, color 0.12s ease;
}

.cf-topbar__link:hover {
    background: var(--cf-hover);
    color: var(--cf-text);
    text-decoration: none;
}

.cf-topbar__link-icon {
    color: var(--cf-text-3);
    display: inline-flex;
}

.cf-topbar__burger {
    display: none;
    margin-right: auto;
    border: 1px solid var(--cf-border);
    background: var(--cf-surface);
    border-radius: var(--cf-radius);
    width: 36px;
    height: 36px;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--cf-text);
    padding: 0;
    transition: background 0.12s ease;
}

.cf-topbar__burger:hover {
    background: var(--cf-hover);
}

/* --------------------------------------------------------------------------
   Main content
   -------------------------------------------------------------------------- */

.cf-main {
    flex: 1;
    padding: 32px 40px 56px;
    max-width: 1140px;
    width: 100%;
    margin: 0 auto;
}

.cf-page-head {
    margin-bottom: 24px;
}

.cf-page-head__title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 4px 0 6px;
    font-size: 28px;
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.25;
    color: var(--cf-text);
}

.cf-page-head__title-icon {
    color: var(--cf-text);
    display: inline-flex;
}

.cf-page-head__desc {
    margin: 0;
    color: var(--cf-text-2);
    font-size: 15px;
    max-width: 720px;
    line-height: 1.5;
}

.cf-page-head__actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 14px;
}

/* Eyebrow badge (Pill) */
.cf-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--cf-text-2);
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-full);
    padding: 3px 10px;
    margin: 0 0 6px;
    box-shadow: var(--cf-shadow-sm);
}

/* Callout Box (Cloudflare info box) */
.cf-callout {
    background: var(--cf-blue-light);
    border: 1px solid var(--cf-blue-border);
    border-radius: var(--cf-radius-lg);
    padding: 14px 18px;
    margin: 16px 0 20px;
    color: var(--cf-blue);
    font-size: 13.5px;
    line-height: 1.5;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.cf-callout a {
    color: var(--cf-blue);
    font-weight: 600;
    text-decoration: underline;
}

/* Cards */
.cf-card {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    padding: 20px 22px;
    margin-bottom: 16px;
    box-shadow: var(--cf-shadow-sm);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.cf-card:hover {
    border-color: var(--cf-border-strong);
}

.cf-card__title {
    margin: 0 0 4px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--cf-text);
}

.cf-card__body {
    margin: 0;
    color: var(--cf-text-2);
    font-size: 14px;
}

.cf-card-row {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
}

/* App list (Cloudflare-style table-card hybrid) */
.cf-app-list {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    box-shadow: var(--cf-shadow-sm);
}

.cf-app-list__item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--cf-border);
    color: var(--cf-text);
    transition: background 0.12s ease;
}

.cf-app-list__item:last-child {
    border-bottom: none;
}

.cf-app-list__item:hover {
    background: var(--cf-hover);
    text-decoration: none;
}

.cf-app-list__icon {
    width: 40px;
    height: 40px;
    border-radius: var(--cf-radius-lg);
    border: 1px solid var(--cf-border);
    object-fit: cover;
    flex-shrink: 0;
    background: var(--cf-surface);
}

.cf-app-list__info {
    flex: 1;
    min-width: 0;
}

.cf-app-list__name {
    margin: 0;
    font-weight: 600;
    font-size: 14px;
    color: var(--cf-link);
}

.cf-app-list__item:hover .cf-app-list__name {
    text-decoration: underline;
}

.cf-app-list__desc {
    margin: 1px 0 0;
    font-size: 12.5px;
    color: var(--cf-text-2);
}

.cf-app-list__meta {
    flex-shrink: 0;
}

.cf-app-list__arrow {
    color: var(--cf-text-3);
    flex-shrink: 0;
    display: inline-flex;
}

/* Badge */
.cf-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 11.5px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: var(--cf-radius-full);
    white-space: nowrap;
}

.cf-badge--green {
    background: var(--cf-green-bg);
    color: var(--cf-green);
    border: 1px solid var(--cf-green-border);
}

.cf-badge--gray {
    background: var(--cf-hover);
    color: var(--cf-text-2);
    border: 1px solid var(--cf-border);
}

.cf-badge--orange {
    background: #fff3e6;
    color: #b45309;
    border: 1px solid #fed7aa;
}

/* Buttons */
.cf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: var(--cf-radius);
    font: inherit;
    font-size: 13.5px;
    font-weight: 500;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.12s ease, border-color 0.12s ease, box-shadow 0.12s ease;
    text-decoration: none;
    box-shadow: var(--cf-shadow-sm);
    white-space: nowrap;
}

.cf-btn:hover {
    text-decoration: none;
}

.cf-btn--primary {
    background: var(--cf-blue);
    color: #ffffff;
}

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

.cf-btn--secondary {
    background: var(--cf-surface);
    color: var(--cf-text);
    border-color: var(--cf-border-strong);
}

.cf-btn--secondary:hover {
    background: var(--cf-hover);
    border-color: var(--cf-text-3);
}

/* Search input (page level) */
.cf-search-field {
    display: flex;
    align-items: center;
    gap: 0;
    max-width: 420px;
}

.cf-search-field input {
    flex: 1;
    padding: 8px 12px;
    border: 1px solid var(--cf-border-strong);
    border-right: none;
    border-radius: var(--cf-radius) 0 0 var(--cf-radius);
    font: inherit;
    font-size: 13.5px;
}

.cf-search-field input:focus {
    outline: none;
    border-color: var(--cf-blue);
}

.cf-search-field .cf-btn {
    border-radius: 0 var(--cf-radius) var(--cf-radius) 0;
}

/* Headings & generic content inside main */
.cf-main h2.cf-section-title {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin: 32px 0 12px;
    color: var(--cf-text);
}

.cf-main h3 {
    font-size: 15px;
    font-weight: 600;
    margin: 20px 0 6px;
}

.cf-main p {
    color: var(--cf-text-2);
}

.cf-main .cf-article p,
.cf-card p {
    color: var(--cf-text-2);
}

.cf-main .section-lead {
    color: var(--cf-text-2);
    font-size: 14.5px;
    margin: 0 0 16px;
    max-width: 720px;
}

.cf-btn-row {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    align-items: center;
    margin: 16px 0;
}

.cf-btn-row--center {
    justify-content: center;
}

/* Hero (agenda-style) */
.cf-hero {
    text-align: center;
    padding: 24px 0 32px;
}

.cf-hero__pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-full);
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
    box-shadow: var(--cf-shadow-sm);
}

.cf-hero__pill img,
.cf-hero__pill .cf-hero__pill-icon {
    height: 16px;
    width: auto;
    display: inline-block;
}

.cf-hero__title {
    font-size: 38px;
    font-weight: 700;
    letter-spacing: -0.03em;
    margin: 0 0 8px;
    line-height: 1.15;
    color: var(--cf-text);
}

.cf-hero__lead {
    color: var(--cf-text-2);
    font-size: 16px;
    margin: 0;
}

/* Grid of small cards */
.cf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 14px;
}

.cf-grid .cf-card {
    margin-bottom: 0;
}

/* Table */
.cf-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    font-size: 13.5px;
    box-shadow: var(--cf-shadow-sm);
}

.cf-table th {
    text-align: left;
    font-weight: 600;
    color: var(--cf-text);
    padding: 10px 14px;
    border-bottom: 1px solid var(--cf-border);
    background: var(--cf-hover);
    white-space: nowrap;
}

.cf-table td {
    padding: 12px 14px;
    border-bottom: 1px solid var(--cf-border);
    color: var(--cf-text-2);
    vertical-align: top;
}

.cf-table tr:last-child td {
    border-bottom: none;
}

/* Footer */
.cf-footer {
    border-top: 1px solid var(--cf-border);
    background: var(--cf-surface);
    padding: 16px 40px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 12.5px;
    color: var(--cf-text-3);
}

.cf-footer a {
    color: var(--cf-text-2);
}

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

.cf-footer__links {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* --------------------------------------------------------------------------
   Article / legal content
   -------------------------------------------------------------------------- */

.cf-article {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    padding: 28px 32px;
    max-width: 860px;
    box-shadow: var(--cf-shadow-sm);
}

.cf-article h1 {
    font-size: 24px;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin: 0 0 6px;
    color: var(--cf-text);
}

.cf-article .cf-page-meta {
    color: var(--cf-text-3);
    font-size: 12.5px;
    margin: 0 0 20px;
}

.cf-article section {
    margin-top: 24px;
}

.cf-article section:first-of-type {
    margin-top: 0;
}

.cf-article h2 {
    font-size: 16px;
    font-weight: 600;
    margin: 0 0 6px;
    color: var(--cf-text);
}

.cf-article h3 {
    font-size: 14px;
    font-weight: 600;
    margin: 16px 0 4px;
    color: var(--cf-text);
}

.cf-article p {
    color: var(--cf-text-2);
    font-size: 14px;
    margin: 0 0 8px;
}

.cf-article ul,
.cf-article ol {
    color: var(--cf-text-2);
    font-size: 14px;
    padding-left: 20px;
    margin: 0 0 10px;
}

.cf-article li {
    margin-bottom: 4px;
}

/* Spec list (definition rows) */
.cf-spec-list {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    margin: 0 0 16px;
    box-shadow: var(--cf-shadow-sm);
}

.cf-spec-list__row {
    display: flex;
    gap: 16px;
    padding: 12px 18px;
    border-bottom: 1px solid var(--cf-border);
    font-size: 13.5px;
}

.cf-spec-list__row:last-child {
    border-bottom: none;
}

.cf-spec-list__label {
    flex: 0 0 160px;
    font-weight: 600;
    color: var(--cf-text);
}

.cf-spec-list__value {
    color: var(--cf-text-2);
}

@media (max-width: 640px) {
    .cf-spec-list__row {
        flex-direction: column;
        gap: 2px;
        padding: 10px 14px;
    }

    .cf-spec-list__label {
        flex-basis: auto;
    }
}

/* FAQ (details accordion) */
.cf-faq {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    box-shadow: var(--cf-shadow-sm);
}

.cf-faq details {
    border-bottom: 1px solid var(--cf-border);
}

.cf-faq details:last-child {
    border-bottom: none;
}

.cf-faq summary {
    padding: 13px 18px;
    font-size: 14px;
    font-weight: 600;
    color: var(--cf-text);
    cursor: pointer;
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    user-select: none;
}

.cf-faq summary::-webkit-details-marker {
    display: none;
}

.cf-faq summary::after {
    content: "+";
    font-size: 17px;
    font-weight: 400;
    color: var(--cf-text-3);
    flex-shrink: 0;
    transition: transform 0.15s ease;
}

.cf-faq details[open] summary::after {
    transform: rotate(45deg);
}

.cf-faq details[open] summary {
    color: var(--cf-blue);
}

.cf-faq details p {
    padding: 0 18px 14px;
    margin: 0;
    color: var(--cf-text-2);
    font-size: 13.5px;
    line-height: 1.5;
}

/* Forms */
.cf-form {
    max-width: 640px;
}

.cf-form .cf-field {
    margin-bottom: 16px;
}

.cf-form label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--cf-text);
    margin-bottom: 5px;
}

.cf-form .cf-field-note {
    font-weight: 400;
    color: var(--cf-text-3);
    font-size: 12px;
}

.cf-form input[type="text"],
.cf-form input[type="email"],
.cf-form textarea {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid var(--cf-border-strong);
    border-radius: var(--cf-radius);
    font: inherit;
    font-size: 13.5px;
    color: var(--cf-text);
    background: var(--cf-surface);
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.cf-form textarea {
    min-height: 140px;
    resize: vertical;
}

.cf-form input:focus,
.cf-form textarea:focus {
    outline: none;
    border-color: var(--cf-blue);
    box-shadow: 0 0 0 2px rgba(0, 81, 195, 0.15);
}

.cf-form .cf-char-count {
    font-size: 11.5px;
    color: var(--cf-text-3);
    text-align: right;
    margin: 3px 0 0;
}

.cf-notice {
    border-radius: var(--cf-radius);
    padding: 12px 16px;
    font-size: 13.5px;
    margin-top: 14px;
    border: 1px solid transparent;
}

.cf-notice--success {
    background: var(--cf-green-bg);
    color: var(--cf-green);
    border-color: var(--cf-green-border);
}

.cf-notice--error {
    background: #fef2f2;
    color: #b91c1c;
    border-color: #fecaca;
}

/* --------------------------------------------------------------------------
   Screenshot Gallery (Responsive Grid + Mobile Snap Carousel)
   -------------------------------------------------------------------------- */

.cf-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 14px;
    margin: 0 0 20px;
    padding: 0;
}

.cf-gallery figure {
    margin: 0;
    display: flex;
    flex-direction: column;
}

.cf-gallery img {
    width: 100%;
    height: auto;
    aspect-ratio: 1242 / 2688;
    object-fit: cover;
    object-position: top;
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    display: block;
    background: var(--cf-surface);
    box-shadow: var(--cf-shadow-sm);
    transition: transform 0.18s ease, border-color 0.18s ease, box-shadow 0.18s ease;
}

.cf-gallery figure:hover img {
    transform: translateY(-2px);
    border-color: var(--cf-border-strong);
    box-shadow: var(--cf-shadow);
}

.cf-gallery figcaption {
    font-size: 12px;
    font-weight: 500;
    color: var(--cf-text-2);
    margin-top: 6px;
    text-align: center;
    line-height: 1.35;
}

/* Hub list (PDF levels) */
.cf-hub-list {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
    box-shadow: var(--cf-shadow-sm);
}

.cf-hub-list li {
    border-bottom: 1px solid var(--cf-border);
}

.cf-hub-list li:last-child {
    border-bottom: none;
}

.cf-hub-list a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 18px;
    color: var(--cf-text);
    font-size: 13.5px;
    transition: background 0.12s ease;
}

.cf-hub-list a:hover {
    background: var(--cf-hover);
    text-decoration: none;
}

.cf-hub-list .cf-hub-list__level {
    flex-shrink: 0;
    width: 36px;
    font-weight: 700;
    color: var(--cf-orange);
}

.cf-hub-list .cf-hub-list__type {
    font-weight: 600;
    color: var(--cf-link);
}

.cf-hub-list .cf-hub-list__meta {
    margin-left: auto;
    color: var(--cf-text-3);
    font-size: 12px;
    text-align: right;
}

/* Steps */
.cf-steps {
    margin: 0 0 16px;
    padding: 0;
    list-style: none;
    counter-reset: cfstep;
}

.cf-steps li {
    position: relative;
    padding: 0 0 18px 38px;
    counter-increment: cfstep;
}

.cf-steps li::before {
    content: counter(cfstep);
    position: absolute;
    left: 0;
    top: 0;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--cf-hover);
    border: 1px solid var(--cf-border);
    color: var(--cf-text);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cf-steps li::after {
    content: "";
    position: absolute;
    left: 11.5px;
    top: 26px;
    bottom: 2px;
    width: 1px;
    background: var(--cf-border);
}

.cf-steps li:last-child {
    padding-bottom: 0;
}

.cf-steps li:last-child::after {
    display: none;
}

.cf-steps .cf-steps__title {
    font-weight: 600;
    font-size: 14px;
    color: var(--cf-text);
}

.cf-steps p {
    margin: 1px 0 0;
    font-size: 13px;
    color: var(--cf-text-2);
}

/* PDF download list */
.cf-pdf-list {
    background: var(--cf-surface);
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    overflow: hidden;
    list-style: none;
    margin: 0 0 16px;
    padding: 0;
    counter-reset: cfpdf;
    box-shadow: var(--cf-shadow-sm);
}

.cf-pdf-list li {
    border-bottom: 1px solid var(--cf-border);
}

.cf-pdf-list li:last-child {
    border-bottom: none;
}

.cf-pdf-list a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    font-size: 13.5px;
    font-weight: 500;
    transition: background 0.12s ease;
}

.cf-pdf-list a::before {
    counter-increment: cfpdf;
    content: counter(cfpdf);
    flex-shrink: 0;
    width: 24px;
    height: 24px;
    border-radius: 4px;
    background: var(--cf-hover);
    border: 1px solid var(--cf-border);
    color: var(--cf-text-2);
    font-size: 11.5px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

.cf-pdf-list a:hover {
    background: var(--cf-hover);
    text-decoration: none;
}

.cf-pdf-list a:hover::before {
    background: #fff3e6;
    color: #b45309;
    border-color: #fed7aa;
}

/* Sample images (pdf problem/answer) */
.cf-sample-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 14px;
    margin: 0 0 16px;
}

.cf-sample-grid figure {
    margin: 0;
}

.cf-sample-grid img {
    width: 100%;
    height: auto;
    border: 1px solid var(--cf-border);
    border-radius: var(--cf-radius-lg);
    display: block;
    box-shadow: var(--cf-shadow-sm);
}

.cf-sample-grid figcaption {
    font-size: 12px;
    color: var(--cf-text-3);
    margin-top: 5px;
    text-align: center;
}

/* --------------------------------------------------------------------------
   Mobile & Responsive Adaptations (Mobile-first polish)
   -------------------------------------------------------------------------- */

.cf-sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.45);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: 39;
    opacity: 0;
    transition: opacity 0.2s ease;
}

@media (max-width: 960px) {
    .cf-sidebar {
        transform: translateX(-100%);
        transition: transform 0.24s cubic-bezier(0.16, 1, 0.3, 1);
        box-shadow: 0 0 24px rgba(0, 0, 0, 0.15);
        width: min(290px, 84vw);
    }

    body.cf-nav-open {
        overflow: hidden;
    }

    body.cf-nav-open .cf-sidebar {
        transform: translateX(0);
    }

    body.cf-nav-open .cf-sidebar-backdrop {
        display: block;
        opacity: 1;
    }

    .cf-shell {
        margin-left: 0;
    }

    .cf-topbar {
        justify-content: flex-end;
        padding: 0 14px;
        height: 52px;
    }

    .cf-topbar__burger {
        display: inline-flex;
    }

    .cf-main {
        padding: 20px 14px 44px;
    }

    .cf-hero {
        padding: 16px 0 24px;
    }

    .cf-hero__title {
        font-size: 28px;
    }

    .cf-hero__lead {
        font-size: 14.5px;
    }

    .cf-page-head__title {
        font-size: 22px;
        line-height: 1.3;
    }

    .cf-page-head__desc {
        font-size: 14px;
    }

    .cf-footer {
        padding: 14px;
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .cf-card {
        padding: 16px 18px;
    }

    .cf-article {
        padding: 20px 18px;
    }
}

/* Mobile Horizontal Scroll for Screenshot Gallery (<= 768px) */
@media (max-width: 768px) {
    .cf-gallery {
        display: flex;
        overflow-x: auto;
        scroll-snap-type: x mandatory;
        gap: 12px;
        padding: 4px 14px 16px;
        margin: 0 -14px 16px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
        scrollbar-color: var(--cf-border-strong) transparent;
    }

    .cf-gallery::-webkit-scrollbar {
        height: 4px;
    }

    .cf-gallery::-webkit-scrollbar-track {
        background: transparent;
    }

    .cf-gallery::-webkit-scrollbar-thumb {
        background: var(--cf-border-strong);
        border-radius: 4px;
    }

    .cf-gallery figure {
        flex: 0 0 68vw;
        max-width: 230px;
        scroll-snap-align: center;
        scroll-snap-stop: normal;
    }

    .cf-gallery figcaption {
        font-size: 11.5px;
    }
}