/* ============================================================================
   nits.shop — NIT Silchar campus exchange
   "Campus exchange, engineered." Drafting-paper ground, ink-blue structure,
   monospace for every hard number, a 6-segment condition meter as the signature.
   ========================================================================== */

:root {
    --paper:        #F4F1E8;
    --paper-raised: #FBF9F3;
    --paper-veil:   rgba(244, 241, 232, 0.74);
    --ink:          #14203A;
    --ink-soft:     #5B6270;
    --rule:         rgba(20, 32, 58, 0.14);
    --rule-strong:  rgba(20, 32, 58, 0.55);
    --accent:       #145C63;
    --accent-ink:   #0C3B40;
    --accent-tint:  rgba(20, 92, 99, 0.12);
    --stamp:        #B23A2E;
    --field:        #FFFFFF;
    --grid-line:    rgba(20, 32, 58, 0.06);
    --shadow:       0 10px 30px rgba(20, 32, 58, 0.14);

    --font-display: "IBM Plex Sans Condensed", "Arial Narrow", system-ui, sans-serif;
    --font-body:    "IBM Plex Sans", system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
    --font-mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

    --fs-xs:  0.75rem;
    --fs-sm:  0.8125rem;
    --fs-base: 0.9375rem;
    --fs-md:  1.0625rem;
    --fs-lg:  1.375rem;
    --fs-xl:  clamp(1.6rem, 1.1rem + 2.2vw, 2.1rem);
    --fs-2xl: clamp(2rem, 1.3rem + 3.4vw, 3rem);

    --maxw: 1080px;
    --pad:  clamp(1rem, 4vw, 2.5rem);
    --radius: 8px;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --paper:        #14150F;
        --paper-raised: #1D1E16;
        --paper-veil:   rgba(20, 21, 15, 0.74);
        --ink:          #ECE7D8;
        --ink-soft:     #9B978A;
        --rule:         rgba(236, 231, 216, 0.16);
        --rule-strong:  rgba(236, 231, 216, 0.5);
        --accent:       #55B7BC;
        --accent-ink:   #7FCED2;
        --accent-tint:  rgba(85, 183, 188, 0.16);
        --stamp:        #E07A6C;
        --field:        #24261C;
        --grid-line:    rgba(236, 231, 216, 0.05);
        --shadow:       0 10px 30px rgba(0, 0, 0, 0.5);
    }
}

:root[data-theme="dark"] {
    --paper:        #14150F;
    --paper-raised: #1D1E16;
    --paper-veil:   rgba(20, 21, 15, 0.74);
    --ink:          #ECE7D8;
    --ink-soft:     #9B978A;
    --rule:         rgba(236, 231, 216, 0.16);
    --rule-strong:  rgba(236, 231, 216, 0.5);
    --accent:       #55B7BC;
    --accent-ink:   #7FCED2;
    --accent-tint:  rgba(85, 183, 188, 0.16);
    --stamp:        #E07A6C;
    --field:        #24261C;
    --grid-line:    rgba(236, 231, 216, 0.05);
    --shadow:       0 10px 30px rgba(0, 0, 0, 0.5);
}

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

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

body {
    font-family: var(--font-body);
    font-size: var(--fs-base);
    line-height: 1.62;
    color: var(--ink);
    background-color: var(--paper);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 2px; }
a:hover { color: var(--accent-ink); }

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.1;
    letter-spacing: -0.01em;
}

.mono { font-family: var(--font-mono); }
.muted { color: var(--ink-soft); }
.strike { text-decoration: line-through; color: var(--ink-soft); }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

/* ---- Wordmark ------------------------------------------------------------ */
.wordmark {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    letter-spacing: -0.02em;
    color: var(--ink);
    text-decoration: none;
    display: inline-flex;
    align-items: baseline;
}
.wordmark .dot { color: var(--accent); }
.wordmark .tld { font-family: var(--font-mono); font-weight: 500; font-size: 0.78em; }
.wordmark.small { font-size: 1rem; }

/* ---- Header ------------------------------------------------------------- */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: var(--paper-veil);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--rule);
}
.bar {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0.85rem var(--pad);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}
.site-nav { display: flex; align-items: center; gap: 0.9rem; }
.nav-link {
    font-weight: 500;
    color: var(--ink-soft);
    text-decoration: none;
}
.nav-link:hover { color: var(--ink); }

.theme-toggle {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--ink-soft);
    background: transparent;
    border: 1px solid var(--rule);
    border-radius: 6px;
    padding: 0.4rem 0.55rem;
    cursor: pointer;
}
.theme-toggle:hover { color: var(--ink); border-color: var(--rule-strong); }

/* ---- Buttons ---------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.1rem;
    border-radius: 7px;
    border: 1.5px solid transparent;
    font-family: var(--font-body);
    font-size: var(--fs-base);
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: transform 0.12s ease, background-color 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-ink); border-color: var(--accent-ink); color: #fff; }
.btn-outline { background: transparent; color: var(--ink); border-color: var(--rule-strong); }
.btn-outline:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.btn-danger { background: transparent; color: var(--stamp); border-color: var(--stamp); }
.btn-danger:hover { background: var(--stamp); color: #fff; }
.btn-google { background: var(--field); color: var(--ink); border-color: var(--rule-strong); }
.btn-google:hover { border-color: var(--ink); color: var(--ink); }
.btn-google img { width: 16px; height: 16px; }
.btn-full { width: 100%; }
.btn-lg { padding: 0.8rem 1.4rem; font-size: var(--fs-md); }

/* ---- Layout shell --------------------------------------------------- */
.page {
    flex: 1;
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 3rem) var(--pad) 4rem;
}

.site-footer {
    border-top: 1px solid var(--rule);
    padding: 1.6rem var(--pad);
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.4rem;
    align-items: center;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--ink-soft);
}
.site-footer .wordmark { color: var(--ink-soft); }

/* ---- Flash toasts ------------------------------------------------- */
.flash-stack {
    position: fixed;
    top: 4.5rem;
    right: var(--pad);
    z-index: 100;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-width: min(22rem, 90vw);
}
.flash {
    padding: 0.75rem 0.95rem;
    background: var(--paper-raised);
    border: 1px solid var(--rule);
    border-left: 3px solid var(--ink-soft);
    border-radius: 6px;
    box-shadow: var(--shadow);
    font-size: var(--fs-sm);
}
.flash-success { border-left-color: var(--accent); }
.flash-danger  { border-left-color: var(--stamp); }
.flash-warning { border-left-color: #B9791C; }
.flash-info    { border-left-color: var(--ink-soft); }

/* ---- Listing header --------------------------------------------- */
.listing-head {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 1.5rem 2rem;
    align-items: end;
    padding: clamp(1.5rem, 3vw, 2.2rem);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background-color: var(--paper-raised);
    background-image:
        linear-gradient(var(--grid-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
    background-size: 34px 34px;
    background-position: -1px -1px;
    margin-bottom: 2rem;
}
.eyebrow {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.7rem;
}
.listing-head h1 { font-size: var(--fs-2xl); font-weight: 700; }
.lede {
    margin-top: 0.7rem;
    max-width: 46ch;
    color: var(--ink-soft);
    font-size: var(--fs-md);
}
.listing-meta {
    margin-top: 1.1rem;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.3rem;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--ink-soft);
}
.listing-meta b { color: var(--ink); font-weight: 600; }
.listing-head-cta { display: flex; flex-direction: column; gap: 0.5rem; align-items: flex-start; }
.hint { font-size: var(--fs-xs); color: var(--ink-soft); font-family: var(--font-mono); }

/* ---- Item grid (framed ledger) -------------------------------- */
.grid {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
}
.grid > li {
    background: var(--paper-raised);
    border-right: 1px solid var(--rule);
    border-bottom: 1px solid var(--rule);
    margin: 0 -1px -1px 0;
    transition: box-shadow 0.14s ease;
}
.grid > li:hover {
    position: relative;
    z-index: 2;
    box-shadow: 0 10px 26px rgba(20, 32, 58, 0.18);
}

.card {
    display: flex;
    flex-direction: column;
    height: 100%;
    text-decoration: none;
    color: var(--ink);
}
.card-media {
    position: relative;
    aspect-ratio: 4 / 3;
    background: var(--paper);
    border-bottom: 1px solid var(--rule);
}
.card-media img { width: 100%; height: 100%; object-fit: cover; }
.card.is-sold .card-media img { filter: grayscale(0.6); opacity: 0.72; }

.card-body { padding: 0.9rem 1rem 1rem; display: flex; flex-direction: column; gap: 0.5rem; flex: 1; }
.card-title {
    font-size: var(--fs-md);
    font-weight: 600;
    line-height: 1.2;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.card-price {
    font-family: var(--font-mono);
    font-size: var(--fs-md);
    font-weight: 500;
    color: var(--ink);
    margin-top: auto;
}
.card:hover .card-title { color: var(--accent); }

.tag-row { display: flex; flex-wrap: wrap; gap: 0.4rem; align-items: center; }
.tag {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.2em 0.5em;
    border: 1px solid var(--rule);
    border-radius: 5px;
    color: var(--ink-soft);
}

/* ---- Condition meter chip (signature) ------------------------- */
.cond {
    display: inline-flex;
    align-items: center;
    gap: 0.45em;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 500;
    padding: 0.22em 0.5em;
    border: 1px solid var(--rule);
    border-radius: 5px;
    background: var(--paper);
    color: var(--ink-soft);
    white-space: nowrap;
}
.cond-bars { display: inline-flex; gap: 2px; align-items: flex-end; }
.cond-bars i {
    width: 3px;
    height: 11px;
    border-radius: 1px;
    background: var(--rule-strong);
    opacity: 0.28;
}
.cond-bars i.on { opacity: 1; background: var(--accent); }
.cond-code { color: var(--ink); letter-spacing: 0.02em; }
.cond-name { color: var(--ink-soft); }

/* ---- SOLD stamp ---------------------------------------------- */
.sold-stamp {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) rotate(-13deg);
    font-family: var(--font-display);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    font-size: clamp(1.3rem, 5vw, 2.2rem);
    color: var(--stamp);
    border: 0.16em solid var(--stamp);
    border-radius: 0.1em;
    padding: 0.06em 0.32em;
    background: var(--paper-veil);
    pointer-events: none;
}

/* ---- Empty state ------------------------------------------- */
.empty {
    text-align: center;
    padding: 4rem 1.5rem;
    border: 1px dashed var(--rule-strong);
    border-radius: var(--radius);
}
.empty h2 { font-size: var(--fs-lg); margin-bottom: 0.4rem; }
.empty p { color: var(--ink-soft); margin-bottom: 1.3rem; }

/* ---- Back link -------------------------------------------- */
.back-link {
    display: inline-block;
    margin-bottom: 1.3rem;
    font-family: var(--font-mono);
    font-size: var(--fs-sm);
    color: var(--ink-soft);
    text-decoration: none;
}
.back-link:hover { color: var(--ink); }

/* ---- Detail page ----------------------------------------- */
.detail {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
}
.detail-gallery { display: flex; flex-direction: column; gap: 1rem; position: relative; }

.gallery-main {
    position: relative;
    aspect-ratio: 1 / 1;
    max-height: 460px;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--paper-raised);
    overflow: hidden;
    cursor: crosshair;
}
.gallery-main img { width: 100%; height: 100%; object-fit: contain; }
.gallery-main.is-sold img { filter: grayscale(0.5); }

.zoom-box {
    display: none;
    position: absolute;
    top: 0;
    left: calc(100% + 1.25rem);
    width: 420px;
    height: 420px;
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius);
    background-color: var(--paper-raised);
    background-repeat: no-repeat;
    background-size: 230%;
    box-shadow: var(--shadow);
    z-index: 20;
    pointer-events: none;
}
.zoom-box.visible { display: block; }
@media (max-width: 1150px) { .zoom-box.visible { display: none; } }

.gallery-thumbs { display: flex; gap: 0.5rem; overflow-x: auto; padding-bottom: 0.25rem; }
.thumb {
    flex: 0 0 auto;
    width: 66px;
    height: 66px;
    padding: 0;
    border: 1px solid var(--rule);
    border-radius: 6px;
    background: var(--paper-raised);
    cursor: pointer;
    overflow: hidden;
    opacity: 0.65;
    transition: opacity 0.12s ease, border-color 0.12s ease;
}
.thumb img { width: 100%; height: 100%; object-fit: cover; }
.thumb:hover, .thumb.active { opacity: 1; border-color: var(--accent); }

/* ---- Detail panel (spec sheet) -------------------------- */
.detail-panel {
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--paper-raised);
    padding: clamp(1.25rem, 3vw, 1.8rem);
}
.panel-status { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.9rem; }
.status {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 500;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    padding: 0.25em 0.6em;
    border-radius: 999px;
    border: 1px solid transparent;
}
.status-live { color: var(--accent); background: var(--accent-tint); border-color: var(--accent); }
.status-sold { color: var(--stamp); background: transparent; border-color: var(--stamp); }

.detail-title { font-size: var(--fs-xl); font-weight: 700; margin-bottom: 0.4rem; }
.detail-price {
    font-family: var(--font-mono);
    font-size: clamp(1.6rem, 1.2rem + 1.6vw, 2.1rem);
    font-weight: 500;
    color: var(--ink);
    margin-bottom: 1.4rem;
}

.spec { border-top: 1px solid var(--rule); margin-bottom: 1.5rem; }
.spec > div {
    display: grid;
    grid-template-columns: 6.5rem 1fr;
    gap: 0.75rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--rule);
}
.spec dt {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-soft);
    padding-top: 0.15rem;
}
.spec dd { font-size: var(--fs-sm); }
.spec dd.mono { font-family: var(--font-mono); color: var(--ink-soft); font-size: var(--fs-xs); }

.detail-desc { margin-bottom: 1.6rem; }
.detail-desc h2, .seller h2, .comments h2 {
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    font-weight: 500;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--ink-soft);
    margin-bottom: 0.7rem;
}
.detail-desc p { white-space: pre-wrap; color: var(--ink); }

/* ---- Seller card ------------------------------------- */
.seller {
    margin-top: 1.5rem;
    padding-top: 1.4rem;
    border-top: 2px dashed var(--rule-strong);
}
.seller-id { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 1rem; }
.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    object-fit: cover;
    border: 1px solid var(--rule);
    background: var(--paper);
}
.avatar.sm { width: 30px; height: 30px; }
.seller-name { font-family: var(--font-display); font-weight: 600; font-size: var(--fs-md); }
.seller .mono { font-size: var(--fs-xs); word-break: break-all; }

.contacts { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.2rem; }
.contacts li {
    display: flex;
    gap: 0.6rem;
    align-items: baseline;
    font-size: var(--fs-sm);
    font-family: var(--font-mono);
    flex-wrap: wrap;
}
.contacts-type {
    font-size: 0.68rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--ink-soft);
    min-width: 4.5rem;
}
.contacts a { word-break: break-all; }

.owner-actions { display: flex; flex-direction: column; gap: 0.6rem; margin-top: 1rem; }
.signin-gate {
    text-align: center;
    padding: 1.1rem;
    background: var(--paper);
    border: 1px solid var(--rule);
    border-radius: 7px;
}
.signin-gate p { color: var(--ink-soft); font-size: var(--fs-sm); margin-bottom: 0.8rem; }

/* ---- Comments ---------------------------------------- */
.comments {
    margin-top: 1rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
}
.comments h2 { display: flex; align-items: center; gap: 0.5rem; }
.comments .count {
    font-family: var(--font-mono);
    color: var(--ink);
    background: var(--accent-tint);
    border-radius: 999px;
    padding: 0.05em 0.5em;
    font-size: var(--fs-xs);
}
.comment-list { display: flex; flex-direction: column; gap: 1rem; margin-bottom: 1.2rem; }
.comment { display: flex; gap: 0.7rem; }
.comment-head { display: flex; gap: 0.6rem; align-items: baseline; margin-bottom: 0.15rem; flex-wrap: wrap; }
.comment-name { font-weight: 600; font-size: var(--fs-sm); }
.comment-head .mono { font-size: var(--fs-xs); }
.comment p { font-size: var(--fs-sm); }

.comment-form { display: flex; gap: 0.5rem; }
.comment-form input {
    flex: 1;
    padding: 0.7rem 0.85rem;
    background: var(--field);
    border: 1px solid var(--rule);
    border-radius: 7px;
    color: var(--ink);
    font-family: inherit;
    font-size: var(--fs-sm);
}
.comment-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-tint); }

/* ---- Forms ------------------------------------------ */
.form-panel {
    max-width: 640px;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 2.5rem);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    background: var(--paper-raised);
}
.form-panel h1 { font-size: var(--fs-xl); font-weight: 700; }
.form-panel .lede { margin-bottom: 1.8rem; }

.field { margin-bottom: 1.4rem; }
.field > label {
    display: block;
    margin-bottom: 0.45rem;
    font-weight: 600;
    font-size: var(--fs-sm);
}
.req { color: var(--stamp); }
.opt {
    font-weight: 400;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--ink-soft);
    text-transform: lowercase;
}

.field input[type="text"],
.field input[type="number"],
.field input[type="url"],
.field textarea,
.field select,
.contact-row input,
.contact-row select {
    width: 100%;
    padding: 0.7rem 0.9rem;
    background: var(--field);
    border: 1px solid var(--rule);
    border-radius: 7px;
    color: var(--ink);
    font-family: var(--font-body);
    font-size: var(--fs-base);
}
.field input.mono, .field .mono input { font-family: var(--font-mono); }
.field input:focus,
.field textarea:focus,
.field select:focus,
.contact-row input:focus,
.contact-row select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-tint);
}
.field textarea { resize: vertical; min-height: 6rem; }
.field select { appearance: none; -webkit-appearance: none; background-image:
    linear-gradient(45deg, transparent 50%, var(--ink-soft) 50%),
    linear-gradient(135deg, var(--ink-soft) 50%, transparent 50%);
    background-position: calc(100% - 20px) 55%, calc(100% - 14px) 55%;
    background-size: 6px 6px, 6px 6px;
    background-repeat: no-repeat;
    padding-right: 2.5rem;
}
.field select option { background: var(--paper-raised); color: var(--ink); }

.row { display: flex; gap: 0.8rem; align-items: center; }
.row > input { flex: 1; }
.checkbox {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    white-space: nowrap;
    font-size: var(--fs-sm);
    font-weight: 500;
    cursor: pointer;
}
.checkbox input { width: auto; accent-color: var(--accent); }

.hint {
    margin-top: 0.5rem;
    font-family: var(--font-mono);
    font-size: var(--fs-xs);
    color: var(--ink-soft);
}

/* image tray */
.image-tray { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: flex-start; }
.image-preview { display: flex; flex-wrap: wrap; gap: 0.6rem; }
.add-image {
    width: 84px;
    height: 84px;
    border: 1.5px dashed var(--rule-strong);
    border-radius: 8px;
    background: var(--paper);
    color: var(--ink-soft);
    font-size: 1.8rem;
    line-height: 1;
    cursor: pointer;
    transition: border-color 0.12s ease, color 0.12s ease;
}
.add-image:hover { border-color: var(--accent); color: var(--accent); }
.add-image.busy { color: transparent; position: relative; }
.add-image.busy::after {
    content: "";
    position: absolute;
    inset: calc(50% - 9px) auto auto calc(50% - 9px);
    width: 18px; height: 18px;
    border: 2px solid var(--rule-strong);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
.thumb-preview { position: relative; width: 84px; height: 84px; }
.thumb-preview img { width: 100%; height: 100%; object-fit: cover; border-radius: 8px; border: 1px solid var(--rule); }
.size-tag {
    position: absolute;
    left: 3px; right: 3px; bottom: 3px;
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: #fff;
    background: rgba(20, 32, 58, 0.72);
    border-radius: 4px;
    padding: 1px 0;
}
.remove-btn {
    position: absolute;
    top: -7px; right: -7px;
    width: 20px; height: 20px;
    border: none;
    border-radius: 50%;
    background: var(--stamp);
    color: #fff;
    font-size: 13px;
    line-height: 1;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-row { display: flex; gap: 0.5rem; margin-bottom: 0.5rem; }
.contact-row select { flex: 0 0 8.5rem; }
.contact-row input { flex: 1; }
.icon-btn {
    flex: 0 0 auto;
    width: 2.6rem;
    border: 1px solid var(--rule-strong);
    border-radius: 7px;
    background: transparent;
    color: var(--ink);
    font-size: 1.1rem;
    cursor: pointer;
}
.icon-btn:hover { border-color: var(--accent); color: var(--accent); }
.icon-btn.danger:hover { border-color: var(--stamp); color: var(--stamp); }

/* ---- Error page ----------------------------------- */
.error-page { text-align: center; padding: 4rem 1rem; }
.error-code { font-size: var(--fs-lg); color: var(--ink-soft); letter-spacing: 0.1em; }
.error-page h1 { font-size: var(--fs-xl); margin: 0.5rem 0 0.8rem; }
.error-page p { color: var(--ink-soft); margin-bottom: 1.6rem; }

/* ---- Responsive ---------------------------------- */
@media (max-width: 880px) {
    .detail { grid-template-columns: 1fr; }
    .detail-gallery { order: 2; }
    .detail-panel { order: 1; }
    .listing-head { grid-template-columns: 1fr; align-items: start; }
    .listing-head-cta { align-items: stretch; }
    .listing-head-cta .btn { width: 100%; }
}
@media (max-width: 520px) {
    .bar { flex-wrap: wrap; }
    .grid { grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); }
    .comment-form { flex-direction: column; }
    .comment-form .btn { width: 100%; }
    .contact-row { flex-wrap: wrap; }
    .contact-row select { flex: 1 1 100%; }
}

/* ---- Motion ------------------------------------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes rise { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }

@media (prefers-reduced-motion: no-preference) {
    .listing-head, .detail, .form-panel, .empty, .error-page { animation: rise 0.45s ease both; }
    .grid > li { animation: rise 0.45s ease both; }
    .grid > li:nth-child(1) { animation-delay: 0.02s; }
    .grid > li:nth-child(2) { animation-delay: 0.06s; }
    .grid > li:nth-child(3) { animation-delay: 0.10s; }
    .grid > li:nth-child(4) { animation-delay: 0.14s; }
    .grid > li:nth-child(5) { animation-delay: 0.18s; }
    .grid > li:nth-child(6) { animation-delay: 0.22s; }
    .grid > li:nth-child(n+7) { animation-delay: 0.26s; }
    .flash { animation: rise 0.3s ease both; }
}