/* Reusable UI components. Not every section is a card — see home.css for
   layouts that deliberately break from the grid-of-cards default. */

/* ---------- Buttons ---------- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    letter-spacing: var(--tracking-wide);
    padding: 0.8rem 1.375rem;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    transition: background-color var(--duration-base) var(--ease-standard),
                color var(--duration-base) var(--ease-standard),
                border-color var(--duration-base) var(--ease-standard),
                transform var(--duration-fast) var(--ease-standard);
    cursor: pointer;
    white-space: nowrap;
}

.btn:active {
    transform: translateY(1px);
}

.btn__icon {
    width: 1rem;
    height: 1rem;
    transition: transform var(--duration-base) var(--ease-standard);
}

.btn:hover .btn__icon {
    transform: translateX(3px);
}

.btn--primary {
    background: var(--color-accent-700);
    color: #ffffff;
}
.btn--primary:hover { background: var(--color-accent-800); }

.btn--secondary {
    background: transparent;
    color: var(--color-ink-900);
    border-color: var(--color-line-strong);
}
.btn--secondary:hover {
    border-color: var(--color-ink-900);
    background: var(--color-paper-sunken);
}

/* on dark panels, secondary needs light-colored chrome */
.section--panel .btn--secondary,
.site-header__actions .btn--secondary {
    color: var(--color-text-inverse);
    border-color: rgba(255, 255, 255, 0.35);
}
.section--panel .btn--secondary:hover {
    border-color: #fff;
    background: rgba(255, 255, 255, 0.06);
}

.btn--ghost {
    background: transparent;
    color: var(--color-accent-700);
    padding-inline: 0;
}
.btn--ghost:hover { color: var(--color-accent-800); }
.section--panel .btn--ghost { color: var(--color-accent-tint); }

/* ---------- Spec plate ----------
   A continuous strip of label:value fields in mono type, read like the
   stamped rating plate on a BEOS device — deliberately NOT the banned
   "hero metric" template (big number, small label, per-item card, accent
   color). Same weight and size throughout; the plate reads as one object,
   not a set of stat cards. */

.spec-plate {
    display: flex;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    letter-spacing: var(--tracking-wide);
}

.spec-plate__field {
    display: flex;
    align-items: baseline;
    gap: var(--space-2);
    padding: var(--space-4) var(--space-5) var(--space-4) 0;
    margin-right: var(--space-5);
    border-right: 1px solid var(--color-line-on-dark);
}

.spec-plate__field:last-child {
    border-right: 0;
    margin-right: 0;
}

.spec-plate__label {
    color: var(--color-text-inverse-muted);
    text-transform: uppercase;
}

.spec-plate__value {
    color: var(--color-text-inverse);
    font-weight: var(--font-medium);
}

/* ---------- Category / product card ---------- */

.category-card {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
    padding: var(--space-6);
    background: var(--color-paper);
    border: 1px solid var(--color-line);
    border-top: 3px solid var(--color-ink-900);
    transition: border-color var(--duration-base) var(--ease-standard),
                box-shadow var(--duration-base) var(--ease-standard),
                transform var(--duration-base) var(--ease-standard);
}

.category-card:hover {
    border-top-color: var(--color-accent-600);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.category-card__index {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    letter-spacing: var(--tracking-wider);
}

.category-card__title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
}

.category-card__count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.category-card__link {
    margin-top: auto;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-accent-700);
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.category-card__link .icon {
    width: 0.9rem;
    height: 0.9rem;
    transition: transform var(--duration-base) var(--ease-standard);
}

.category-card:hover .category-card__link .icon {
    transform: translateX(3px);
}

/* ---------- Value proposition ---------- */

.value-prop {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    padding-top: var(--space-5);
    border-top: 1px solid var(--color-line);
}

.value-prop__title {
    font-size: var(--text-md);
    font-weight: var(--font-semibold);
}

.value-prop__body {
    color: var(--color-text-muted);
    line-height: var(--leading-relaxed);
}

/* ---------- Certification badge ---------- */

.cert-badge {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    letter-spacing: var(--tracking-wider);
    text-transform: uppercase;
    padding: 0.4rem 0.7rem;
    border: 1px solid var(--color-line-on-dark);
    color: var(--color-text-inverse-muted);
}

/* ---------- Icons ---------- */

.icon {
    width: 1.25rem;
    height: 1.25rem;
    flex-shrink: 0;
}