:root {
    --ci-primary: #2563EB;
    --ci-primary-dark: #1E40AF;
    --ci-primary-light: #3B82F6;
    --ci-primary-hover: #1D4ED8;
    --ci-primary-focus: #60A5FA;

    --ci-background: rgb(37, 47, 74);
    --ci-input-background: rgba(255, 255, 255, 0.05);
    --ci-surface: #F8FAFC;
    --ci-surface-alt: #F1F5F9;
    --ci-border: rgba(255, 255, 255, 0.1);
    --ci-border-dark: #CBD5E1;
    --ci-text-primary: #ffffff;
    --ci-text-secondary: rgba(255, 255, 255, 0.6);
    --ci-text-tertiary: #94A3B8;

    --ci-success: #10B981;
    --ci-success-dark: #059669;
    --ci-error: #EF4444;
    --ci-error-dark: #DC2626;
    --ci-warning: #F59E0B;
    --ci-info: #06B6D4;

    --ci-link: #2563EB;
    --ci-link-visited: #7C3AED;
    --ci-link-hover: #1E40AF;

    --ci-shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --ci-shadow-base: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px -1px rgba(0, 0, 0, 0.1);
    --ci-shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --ci-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --ci-shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --ci-radius-sm: 4px;
    --ci-radius-base: 8px;
    --ci-radius-md: 12px;
    --ci-radius-lg: 16px;
    --ci-radius-xl: 24px;
    --ci-radius-full: 9999px;

    --ci-duration-fast: 150ms;
    --ci-duration-base: 200ms;
    --ci-duration-slow: 300ms;

    --ci-easing-default: cubic-bezier(0.4, 0, 0.2, 1);
    --ci-easing-in: cubic-bezier(0.4, 0, 1, 1);
    --ci-easing-out: cubic-bezier(0, 0, 0.2, 1);

    --ci-glass-bg: rgba(255, 255, 255, 0.03);
    --ci-glass-border: rgba(255, 255, 255, 0.1);
    --ci-glass-shadow: 0 3px 0 0 rgba(0, 0, 0, 0.15);
}

/* Dark / hero-section theme scoped to unit converter cards.
   Unit converters (.ciw-converter) rely on the global variables above,
   so the full dark palette is scoped here instead of changing :root
   (which would affect category cards / menus that use hardcoded light colours). */
.ciw-converter {
    --ci-primary: #0058be;
    --ci-primary-dark: #004a9c;
    --ci-primary-light: #3b82f6;
    --ci-background: rgb(37, 47, 74);
    --ci-input-background: rgba(255, 255, 255, 0.05);
    --ci-surface: rgba(255, 255, 255, 0.1);
    --ci-border: rgba(255, 255, 255, 0.1);
    --ci-border-dark: rgba(255, 255, 255, 0.15);
    --ci-text-primary: #ffffff;
    --ci-text-secondary: rgba(255, 255, 255, 0.6);
    --ci-text-tertiary: rgba(255, 255, 255, 0.4);
    --ci-shadow-base: 0 3px 0 0 rgba(0, 0, 0, 0.15);
}

/* Native dropdown popups render on the OS white background,
   so options need dark text to stay readable. */
.ciw-converter option {
    color: #0f172a;
    background: #ffffff;
}

* {
    box-sizing: border-box;
}

.convert-it-widget {
    font-size: 1rem;
    line-height: 1.6;
    color: var(--ci-text-primary);
    background-color: var(--ci-background);
    border: 1px solid var(--ci-border);
    border-radius: var(--ci-radius-base);
    padding: 24px;
    box-shadow: var(--ci-shadow-base);
    transition: all var(--ci-duration-base) var(--ci-easing-default);
}

.convert-it-widget:hover {
    box-shadow: var(--ci-shadow-lg);
}

input[type="text"],
input[type="number"],
input[type="email"],
input[type="url"],
input[type="password"],
textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: 400;
    color: var(--ci-text-primary);
    background-color: var(--ci-input-background, #e8e8e8);
    border: 1px solid var(--ci-border);
    border-radius: var(--ci-radius-base);
    transition: all var(--ci-duration-base) var(--ci-easing-default);
    font-family: inherit;
}

input[type="text"]::placeholder,
input[type="number"]::placeholder,
input[type="email"]::placeholder,
input[type="url"]::placeholder,
input[type="password"]::placeholder,
textarea::placeholder {
    color: var(--ci-text-tertiary);
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="email"]:focus,
input[type="url"]:focus,
input[type="password"]:focus,
textarea:focus {
    outline: none;
    border-color: var(--ci-primary);
    box-shadow: 0 0 0 3px var(--ci-primary-focus);
}

input[type="number"] {
    -moz-appearance: textfield;
}

input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

select {
    width: 100%;
    padding: 12px 16px;
    font-size: 1rem;
    font-weight: 400;
    color: var(--ci-text-primary);
    background-color: var(--ci-background);
    border: 1px solid var(--ci-border);
    border-radius: var(--ci-radius-base);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px 16px;
    padding-right: 40px;
    transition: all var(--ci-duration-base) var(--ci-easing-default);
    font-family: inherit;
}

select:focus {
    outline: none;
    border-color: var(--ci-primary);
    box-shadow: 0 0 0 3px var(--ci-primary-focus);
}

button {
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    padding: 12px 20px;
    border: none;
    border-radius: var(--ci-radius-base);
    cursor: pointer;
    transition: all var(--ci-duration-base) var(--ci-easing-default);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 44px;
}

.convert-it-input-group,
.convert-it-result-group {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
}

.convert-it-input {
    flex: 1;
}

.convert-it-source-unit,
.convert-it-target-unit {
    flex: 0 0 auto;
    min-width: 140px;
}

.convert-it-result {
    flex: 1;
    display: flex;
    align-items: center;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ci-text-primary);
}

.convert-it-alert {
    padding: 16px;
    border-radius: var(--ci-radius-base);
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.convert-it-alert-success {
    background-color: #ECFDF5;
    border: 1px solid var(--ci-success);
    border-left: 4px solid var(--ci-success);
    color: #065F46;
}

.convert-it-alert-error {
    background-color: #FEF2F2;
    border: 1px solid var(--ci-error);
    border-left: 4px solid var(--ci-error);
    color: #991B1B;
}

.is-loading {
    position: relative;
    opacity: 0.6;
    pointer-events: none;
}

.is-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 24px;
    height: 24px;
    margin: -12px 0 0 -12px;
    border: 3px solid var(--ci-border);
    border-top-color: var(--ci-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.slide-down {
    animation: slideDown var(--ci-duration-base) var(--ci-easing-out);
}

@media (max-width: 767px) {
    .convert-it-widget {
        padding: 24px;
    }

    .convert-it-input-group,
    .convert-it-result-group {
        flex-direction: column;
        gap: 12px;
    }

    .convert-it-source-unit,
    .convert-it-target-unit {
        min-width: 100%;
    }
}

@media (min-width: 1024px) {
    .convert-it-input-group,
    .convert-it-result-group {
        flex-direction: row;
    }
}

/* Category shortcodes ([convert_it_<category>]) render as a dark "hero"
   section of glass cards, mirroring the genbuz.net home page design. Colours
   are scoped to `.ci-hero` so they never bleed into the unit converter cards
   (`.ciw-converter`) which have their own dark palette. */

.ci-hero-header {
    margin: 0 0 32px 0;
    text-align: center;
}

.ci-hero-eyebrow {
    display: inline-block;
    padding: 4px 12px;
    margin-bottom: 16px;
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #bfdbfe;
    background: rgba(37, 99, 235, 0.18);
    border: 1px solid rgba(37, 99, 235, 0.35);
    border-radius: var(--ci-radius-full);
}

.ci-hero-title {
    margin: 0 0 12px 0;
    font-size: 1.75rem;
    font-weight: 700;
    line-height: 1.2;
    color: var(--ci-text-primary);
}

.ci-hero-subtitle {
    margin: 0;
    font-size: 1rem;
    color: var(--ci-text-secondary);
    line-height: 1.6;
}

.ci-category-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    width: 100%;
}

.ci-category-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 24px;
    background: var(--ci-glass-bg);
    border: 1px solid var(--ci-glass-border);
    border-radius: 8px;
    box-shadow: var(--ci-glass-shadow);
    text-decoration: none;
    transition: transform var(--ci-duration-base) var(--ci-easing-default),
                box-shadow var(--ci-duration-base) var(--ci-easing-default),
                border-color var(--ci-duration-base) var(--ci-easing-default),
                background-color var(--ci-duration-base) var(--ci-easing-default);
    cursor: pointer;
    min-width: 0;
    box-sizing: border-box;
}

.ci-category-card:hover,
.ci-category-card:focus-visible {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--ci-link);
    box-shadow: var(--ci-glass-shadow), 0 8px 24px rgba(0, 0, 0, 0.35);
    text-decoration: none;
    outline: none;
}

.ci-category-card[aria-disabled="true"] {
    cursor: default;
    opacity: 0.7;
}

.ci-category-card[aria-disabled="true"]:hover {
    transform: none;
    background: var(--ci-glass-bg);
    border-color: var(--ci-glass-border);
    box-shadow: var(--ci-glass-shadow);
}

.ci-category-card-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
    min-width: 0;
    overflow: hidden;
}

.ci-category-card-title {
    font-size: 1.0625rem;
    font-weight: 600;
    color: var(--ci-text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.ci-category-card-desc {
    font-size: 0.875rem;
    color: var(--ci-text-secondary);
    line-height: 1.45;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    word-break: break-word;
}

.ci-category-card-arrow {
    flex-shrink: 0;
    font-size: 1.375rem;
    font-weight: 300;
    color: var(--ci-link);
    transition: color var(--ci-duration-base) var(--ci-easing-default),
                transform var(--ci-duration-base) var(--ci-easing-default);
    line-height: 1;
}

.ci-category-card:hover .ci-category-card-arrow,
.ci-category-card:focus-visible .ci-category-card-arrow {
    color: var(--ci-link);
    transform: translateX(3px);
}

@media (max-width: 767px) {
    .ci-hero {
        padding: 32px 16px;
        border-radius: var(--ci-radius-md);
    }
    .ci-hero-header {
        margin-bottom: 24px;
    }
    .ci-hero-title {
        font-size: 1.5rem;
    }
    .ci-category-grid {
        grid-template-columns: 1fr;
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .ci-category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/*
 * Document category grid ([convert_it_documents]).
 *
 * A self-contained dark hero with a 2-column grid of richer cards. Mirrors the
 * .ci-hero design used by the image/units category grids but carries its own
 * background (so it looks good on any page) and uses two columns because there
 * are only four document categories. The wider cards carry an icon, a
 * description and format chips so they never look sparse.
 */
.ci-hero--documents {
}

.ci-doc-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    width: 100%;
}

.ci-doc-card {
    display: flex;
    flex-direction: column;
    gap: 14px;
    padding: 28px;
    background: var(--ci-glass-bg);
    border: 1px solid var(--ci-glass-border);
    border-radius: var(--ci-radius-md);
    box-shadow: var(--ci-glass-shadow);
    text-decoration: none;
    cursor: pointer;
    min-width: 0;
    box-sizing: border-box;
    transition: transform var(--ci-duration-base) var(--ci-easing-default),
                box-shadow var(--ci-duration-base) var(--ci-easing-default),
                border-color var(--ci-duration-base) var(--ci-easing-default),
                background-color var(--ci-duration-base) var(--ci-easing-default);
}

.ci-doc-card:hover,
.ci-doc-card:focus-visible {
    transform: translateY(-2px);
    background: rgba(255, 255, 255, 0.06);
    border-color: var(--ci-link);
    box-shadow: var(--ci-glass-shadow), 0 8px 24px rgba(0, 0, 0, 0.35);
    text-decoration: none;
    outline: none;
}

.ci-doc-card[aria-disabled="true"] {
    cursor: default;
    opacity: 0.75;
}

.ci-doc-card[aria-disabled="true"]:hover {
    transform: none;
    background: var(--ci-glass-bg);
    border-color: var(--ci-glass-border);
    box-shadow: var(--ci-glass-shadow);
}

.ci-doc-card-top {
    display: flex;
    align-items: center;
    gap: 14px;
}

.ci-doc-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    flex-shrink: 0;
    border-radius: 11px;
    background: rgba(37, 99, 235, 0.18);
    border: 1px solid rgba(37, 99, 235, 0.35);
    color: #bfdbfe;
}

.ci-doc-card-icon svg {
    width: 24px;
    height: 24px;
}

.ci-doc-card-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--ci-text-primary);
    line-height: 1.2;
}

.ci-doc-card-desc {
    font-size: 0.9375rem;
    color: var(--ci-text-secondary);
    line-height: 1.6;
}

.ci-doc-card-formats {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: 2px;
}

.ci-doc-chip {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    padding: 3px 10px;
    border-radius: var(--ci-radius-full);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid var(--ci-glass-border);
    color: var(--ci-text-primary);
}

.ci-doc-card-cta {
    display: inline-flex;
    gap: 6px;
    margin-top: auto;
    padding-top: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--ci-link);
}

.ci-doc-card-arrow {
    font-size: 1.15rem;
    font-weight: 300;
    line-height: 1;
    transition: transform var(--ci-duration-base) var(--ci-easing-default);
}

.ci-doc-card:hover .ci-doc-card-arrow,
.ci-doc-card:focus-visible .ci-doc-card-arrow {
    transform: translateX(3px);
}

@media (max-width: 767px) {
    .ci-hero--documents {
        padding: 32px 16px;
        border-radius: var(--ci-radius-md);
    }

    .ci-doc-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .ci-doc-card {
        padding: 22px;
    }
}

/* List/menu mode renders as a single glass panel inside the hero. */
.ci-menu {
    max-width: 460px;
    margin: 0 auto;
    background: var(--ci-glass-bg);
    border: 1px solid var(--ci-glass-border);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--ci-glass-shadow);
}

.ci-menu-header {
    padding: 14px 24px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--ci-hero-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    background: rgba(255, 255, 255, 0.04);
    border-bottom: 1px solid var(--ci-glass-border);
}

.ci-menu-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.ci-menu-item {
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ci-menu-item:last-child {
    border-bottom: none;
}

.ci-menu-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 14px 24px;
    text-decoration: none;
    color: var(--ci-hero-text);
    transition: background var(--ci-duration-base) var(--ci-easing-default),
                color var(--ci-duration-base) var(--ci-easing-default);
}

a.ci-menu-link:hover,
a.ci-menu-link:focus-visible {
    background: rgba(255, 255, 255, 0.06);
    text-decoration: none;
    color: var(--ci-hero-accent-hover);
    outline: none;
}

a.ci-menu-link:hover .ci-menu-link-arrow,
a.ci-menu-link:focus-visible .ci-menu-link-arrow {
    color: var(--ci-hero-accent-hover);
    transform: translateX(3px);
}

span.ci-menu-link {
    color: var(--ci-hero-faint);
}

.ci-menu-link-text {
    font-size: 0.9375rem;
    font-weight: 500;
}

.ci-menu-link-arrow {
    flex-shrink: 0;
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--ci-hero-faint);
    transition: color var(--ci-duration-base) var(--ci-easing-default),
                transform var(--ci-duration-base) var(--ci-easing-default);
    line-height: 1;
}

.ci-no-converters {
    text-align: center;
    padding: 48px 24px;
    color: var(--ci-hero-muted);
    font-size: 0.9375rem;
    background: var(--ci-hero-bg);
    border-radius: var(--ci-radius-lg);
    margin: 0 auto;
    max-width: 1120px;
}

.ciw-offline {
    text-align: center;
    padding: 40px 24px;
    background: var(--ci-background, #ffffff);
    border: 1px solid var(--ci-border, #e2e8f0);
    border-radius: 12px;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.ciw-offline p {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--ci-text-tertiary, #94a3b8);
    line-height: 1.6;
}