/* ==========================================================================
   Sensor Finder (/technical/sensor-finder)
   Minimal two-column layout: search panel + results list
   ========================================================================== */

.sf-page {
    background: var(--app-bg);
    color: var(--app-text);
    padding-bottom: 3rem;
    font-family: inherit;
}

.sf-container {
    width: 100%;
    max-width: 1100px;
    margin-inline: auto;
    padding-inline: 1rem;
}

/* Hero ==================================================================== */

.sf-hero {
    padding: 2rem 0 1.75rem;
    border-bottom: 1px solid var(--app-border);
    background:
        radial-gradient(900px 220px at 88% -60%, var(--app-primary-light), transparent 70%),
        linear-gradient(180deg, var(--app-surface), var(--app-bg));
}

.sf-hero__eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .3rem .75rem;
    border-radius: 999px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: .78rem;
    font-weight: 700;
}

.sf-hero__eyebrow .oi {
    font-size: .7rem;
}

.sf-hero h1 {
    margin: .7rem 0 .4rem;
    font-size: clamp(1.5rem, 2.4vw, 2rem);
    font-weight: 900;
    letter-spacing: -.01em;
    color: var(--app-text);
}

.sf-hero p {
    max-width: 640px;
    margin: 0;
    color: var(--app-text-muted);
    font-size: .95rem;
    line-height: 1.85;
}

/* Shell =================================================================== */

.sf-shell {
    display: grid;
    grid-template-columns: 300px minmax(0, 1fr);
    align-items: start;
    gap: 1.25rem;
    margin-top: 1.5rem;
}

/* Search panel ============================================================ */

.sf-panel {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: 16px;
    padding: 1.25rem;
    box-shadow: 0 1px 2px var(--app-shadow-sm);
}

.sf-panel__head {
    display: flex;
    align-items: center;
    gap: .7rem;
    margin-bottom: 1.15rem;
}

.sf-panel__icon {
    display: grid;
    place-items: center;
    width: 38px;
    height: 38px;
    flex-shrink: 0;
    border-radius: 11px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: .95rem;
}

.sf-panel__title {
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    color: var(--app-text);
}

.sf-panel__sub {
    margin: .15rem 0 0;
    font-size: .78rem;
    color: var(--app-text-muted);
}

.sf-label {
    display: block;
    margin-bottom: .4rem;
    font-size: .8rem;
    font-weight: 700;
    color: var(--app-text-secondary);
}

.sf-select-wrap {
    position: relative;
    display: flex;
    align-items: center;
}

.sf-select {
    width: 100%;
    height: 46px;
    padding: 0 .9rem;
    padding-inline-end: 2.5rem;
    border: 1.5px solid var(--app-input-border);
    border-radius: 12px;
    background-color: var(--app-input-bg);
    color: var(--app-text);
    font-family: inherit;
    font-size: .92rem;
    font-weight: 600;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    transition: border-color .2s ease, box-shadow .2s ease;
}

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

.sf-select:disabled {
    opacity: .7;
    cursor: wait;
}

.sf-select__chev {
    position: absolute;
    inset-inline-end: .85rem;
    font-size: .7rem;
    color: var(--app-text-muted);
    pointer-events: none;
}

.sf-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    width: 100%;
    height: 46px;
    margin-top: .85rem;
    padding: 0 1rem;
    border: 0;
    border-radius: 12px;
    background: var(--app-primary);
    color: #fff;
    font-family: inherit;
    font-size: .92rem;
    font-weight: 800;
    cursor: pointer;
    transition: background-color .2s ease, transform .15s ease, box-shadow .2s ease;
}

.sf-btn:hover:not(:disabled) {
    background: var(--app-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, .25);
}

.sf-btn:disabled {
    opacity: .55;
    cursor: not-allowed;
}

.sf-btn:focus-visible {
    outline: none;
    box-shadow: 0 0 0 3px var(--app-input-focus);
}

.sf-btn .spinner-border {
    width: .9rem;
    height: .9rem;
    border-width: .14em;
}

.sf-panel__hint {
    display: flex;
    align-items: flex-start;
    gap: .4rem;
    margin: 1rem 0 0;
    padding-top: .9rem;
    border-top: 1px dashed var(--app-border);
    font-size: .76rem;
    line-height: 1.7;
    color: var(--app-text-muted);
}

.sf-panel__hint .oi {
    margin-top: .15rem;
    font-size: .72rem;
}

.sf-recent {
    margin-top: .9rem;
}

.sf-recent__label {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    margin-bottom: .45rem;
    font-size: .74rem;
    font-weight: 800;
    color: var(--app-text-secondary);
}

.sf-recent__list {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
}

.sf-recent__chip {
    padding: .3rem .7rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-bg);
    color: var(--app-text-secondary);
    font-size: .74rem;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: all .15s ease;
}

.sf-recent__chip:hover {
    border-color: var(--app-primary);
    color: var(--app-primary);
    background: var(--app-primary-light);
}

/* Results ================================================================= */

.sf-results {
    min-width: 0;
}

.sf-head {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: .9rem;
}

.sf-head__title {
    margin: 0;
    font-size: 1.05rem;
    font-weight: 900;
    color: var(--app-text);
}

.sf-head__sub {
    margin: .2rem 0 0;
    font-size: .82rem;
    color: var(--app-text-muted);
}

.sf-count {
    flex-shrink: 0;
    padding: .28rem .7rem;
    border-radius: 999px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: .76rem;
    font-weight: 800;
    white-space: nowrap;
}

.sf-list {
    display: grid;
    gap: .6rem;
}

/* Result row ============================================================== */

.sf-item {
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color .2s ease, box-shadow .2s ease;
}

.sf-item:hover {
    border-color: var(--app-border-strong);
}

.sf-item.is-open {
    border-color: var(--app-primary);
    box-shadow: 0 8px 24px var(--app-shadow);
}

.sf-item__head {
    display: flex;
    align-items: center;
    gap: .85rem;
    width: 100%;
    padding: .85rem 1rem;
    border: 0;
    background: transparent;
    color: inherit;
    font-family: inherit;
    text-align: start;
    cursor: pointer;
}

.sf-item__head:focus-visible {
    outline: none;
    box-shadow: inset 0 0 0 2px var(--app-primary);
}

.sf-item__icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 11px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: .9rem;
}

.sf-item__body {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: .35rem;
    min-width: 0;
}

.sf-item__name {
    font-size: .95rem;
    font-weight: 800;
    color: var(--app-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sf-item__meta {
    display: flex;
    flex-wrap: wrap;
    gap: .35rem;
}

.sf-chip {
    padding: .15rem .6rem;
    border: 1px solid var(--app-border);
    border-radius: 999px;
    background: var(--app-bg);
    color: var(--app-text-secondary);
    font-size: .72rem;
    font-weight: 700;
}

.sf-chip--size {
    border-color: transparent;
    background: var(--app-warning-bg);
    color: var(--app-warning);
}

.sf-item__chev {
    display: grid;
    place-items: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
    border-radius: 8px;
    color: var(--app-text-muted);
    font-size: .65rem;
}

.sf-item.is-open .sf-item__chev {
    background: var(--app-primary-light);
    color: var(--app-primary);
}

/* Expanded details ======================================================== */

.sf-details {
    display: grid;
    grid-template-columns: minmax(0, 1fr);
    gap: 1rem;
    padding: 1rem 1rem 1.1rem;
    border-top: 1px solid var(--app-divider);
    background: var(--app-bg);
}

.sf-note__label {
    display: flex;
    align-items: center;
    gap: .4rem;
    margin-bottom: .45rem;
    font-size: .78rem;
    font-weight: 800;
    color: var(--app-primary);
}

.sf-note p {
    margin: 0;
    color: var(--app-text-secondary);
    font-size: .88rem;
    line-height: 1.9;
    white-space: pre-line;
}

.sf-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(96px, 1fr));
    gap: .6rem;
}

.sf-gallery__item {
    position: relative;
    aspect-ratio: 1 / 1;
    padding: 0;
    border: 1px solid var(--app-border);
    border-radius: 12px;
    overflow: hidden;
    background: var(--app-surface);
    cursor: zoom-in;
}

.sf-gallery__item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.sf-gallery__zoom {
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    background: rgba(37, 99, 235, .45);
    color: #fff;
    font-size: .85rem;
    opacity: 0;
    transition: opacity .2s ease;
}

.sf-gallery__item:hover .sf-gallery__zoom,
.sf-gallery__item:focus-visible .sf-gallery__zoom {
    opacity: 1;
}

.sf-gallery__item:focus-visible {
    outline: 2px solid var(--app-primary);
    outline-offset: 2px;
}

.sf-more {
    display: inline-flex;
    align-items: center;
    justify-self: start;
    gap: .45rem;
    padding: .5rem .9rem;
    border-radius: 10px;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    color: var(--app-primary);
    font-size: .84rem;
    font-weight: 800;
    text-decoration: none;
    transition: background-color .2s ease, border-color .2s ease, color .2s ease;
}

.sf-more:hover {
    background: var(--app-primary);
    border-color: var(--app-primary);
    color: #fff;
    text-decoration: none;
}

.sf-more .oi {
    font-size: .72rem;
}

/* States ================================================================== */

.sf-state {
    padding: 3rem 1.5rem;
    border: 1px solid var(--app-border);
    border-radius: 16px;
    background: var(--app-surface);
    text-align: center;
}

.sf-state__icon {
    display: grid;
    place-items: center;
    width: 56px;
    height: 56px;
    margin: 0 auto 1rem;
    border-radius: 16px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: 1.3rem;
}

.sf-state__icon--warn {
    background: var(--app-warning-bg);
    color: var(--app-warning);
}

.sf-state h2 {
    margin: 0 0 .45rem;
    font-size: 1.05rem;
    font-weight: 900;
    color: var(--app-text);
}

.sf-state p {
    max-width: 380px;
    margin: 0 auto;
    color: var(--app-text-muted);
    font-size: .88rem;
    line-height: 1.8;
}

/* Skeleton ================================================================ */

.sf-skel-list {
    display: grid;
    gap: .6rem;
}

.sf-skel {
    display: flex;
    align-items: center;
    gap: .85rem;
    padding: .85rem 1rem;
    border: 1px solid var(--app-border);
    border-radius: 14px;
    background: var(--app-surface);
}

.sf-skel__icon,
.sf-skel__line {
    background: linear-gradient(90deg, var(--app-border) 25%, var(--app-divider) 37%, var(--app-border) 63%);
    background-size: 400% 100%;
    animation: sf-shimmer 1.4s ease infinite;
}

.sf-skel__icon {
    width: 40px;
    height: 40px;
    flex-shrink: 0;
    border-radius: 11px;
}

.sf-skel__lines {
    display: flex;
    flex: 1;
    flex-direction: column;
    gap: .5rem;
}

.sf-skel__line {
    height: 10px;
    border-radius: 999px;
}

.sf-skel__line--short {
    width: 45%;
}

@keyframes sf-shimmer {
    0% { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

/* Lightbox ================================================================ */

.sf-modal {
    position: fixed;
    inset: 0;
    z-index: 2100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    background: rgba(2, 6, 23, .9);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.sf-modal__box {
    display: flex;
    flex-direction: column;
    width: min(920px, 100%);
    max-height: 92vh;
    border-radius: 16px;
    overflow: hidden;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    box-shadow: 0 24px 60px var(--app-shadow-xl);
}

.sf-modal__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .7rem .7rem .7rem 1rem;
    border-bottom: 1px solid var(--app-divider);
}

.sf-modal__title {
    font-size: .9rem;
    font-weight: 800;
    color: var(--app-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.sf-modal__close {
    display: grid;
    place-items: center;
    width: 32px;
    height: 32px;
    flex-shrink: 0;
    border: 0;
    border-radius: 9px;
    background: var(--app-bg);
    color: var(--app-text-secondary);
    font-size: 1.15rem;
    line-height: 1;
    cursor: pointer;
    transition: background-color .2s ease, color .2s ease;
}

.sf-modal__close:hover {
    background: var(--app-danger-bg);
    color: var(--app-danger);
}

.sf-modal__body {
    display: grid;
    place-items: center;
    overflow: auto;
    padding: .75rem;
    background: var(--app-bg);
}

.sf-modal__img {
    max-width: 100%;
    max-height: 78vh;
    object-fit: contain;
    border-radius: 8px;
}

/* Responsive ============================================================== */

@media (min-width: 768px) {
    .sf-state {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 1.1rem;
        padding: 1.5rem 1.25rem;
        text-align: start;
    }

    .sf-state__icon {
        margin: 0;
        flex-shrink: 0;
    }

    .sf-state h2 {
        margin-bottom: .2rem;
    }

    .sf-state p {
        max-width: none;
        margin: 0;
    }
}

@media (min-width: 992px) {
    .sf-panel {
        position: sticky;
        top: 1rem;
    }
}

@media (min-width: 768px) {
    .sf-details:not(.sf-details--single) {
        grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr);
        align-items: start;
    }

    .sf-details:not(.sf-details--single) .sf-gallery {
        grid-template-columns: repeat(3, minmax(0, 1fr));
        gap: .5rem;
    }

    .sf-more {
        grid-column: 1 / -1;
    }
}

@media (max-width: 991.98px) {
    .sf-shell {
        grid-template-columns: minmax(0, 1fr);
    }

    .sf-results {
        min-height: 300px;
    }
}

@media (max-width: 575.98px) {
    .sf-page {
        padding-bottom: 2rem;
    }

    .sf-hero {
        padding: 1.5rem 0 1.25rem;
    }

    .sf-hero h1 {
        font-size: 1.35rem;
    }

    .sf-hero p {
        font-size: .88rem;
    }

    .sf-container {
        padding-inline: .85rem;
    }

    .sf-shell {
        gap: .9rem;
        margin-top: 1rem;
    }

    .sf-panel {
        padding: 1rem;
        border-radius: 14px;
    }

    .sf-item__head {
        gap: .7rem;
        padding: .75rem .8rem;
    }

    .sf-item__icon {
        width: 36px;
        height: 36px;
    }

    .sf-item__name {
        font-size: .9rem;
    }

    .sf-details {
        padding: .9rem .8rem 1rem;
    }

    .sf-gallery {
        grid-template-columns: repeat(3, 1fr);
        gap: .45rem;
    }

    .sf-state {
        padding: 2.25rem 1rem;
    }
}