/* =========================================================================
   Safety Management System — Design tokens
   Palette is drawn from standard workplace safety-sign colours:
   blue = mandatory, amber = warning, green = safe condition, red = hazard.
   ========================================================================= */
:root {
    --color-bg: #ffffff;
    --color-surface: #f6f7f9;
    --color-surface-raised: #ffffff;
    --color-border: #e2e5ea;
    --color-border-strong: #cbd0d8;
    --color-text: #14181f;
    --color-text-muted: #5b6472;
    --color-text-faint: #8a93a1;

    --color-brand: #1D5EA8;
    --color-brand-dark: #164a86;

    --color-swms: #1D5EA8;
    --color-risk: #C77C11;
    --color-sops: #2E7D4F;
    --color-sds: #B3411E;

    --status-valid-bg: #e8f5ed;
    --status-valid-text: #1f6b41;
    --status-expiring-bg: #fdf1de;
    --status-expiring-text: #9a5b0a;
    --status-expired-bg: #fbe8e4;
    --status-expired-text: #9c2c14;

    --radius-s: 8px;
    --radius-m: 14px;
    --radius-l: 20px;

    --shadow-card: 0 1px 2px rgba(20, 24, 31, 0.04), 0 4px 16px rgba(20, 24, 31, 0.05);
    --shadow-raised: 0 2px 4px rgba(20, 24, 31, 0.06), 0 12px 32px rgba(20, 24, 31, 0.08);

    --font-display: 'Barlow Condensed', 'Arial Narrow', sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --tap-min: 48px;
    --container-max: 1120px;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.05;
    margin: 0 0 0.4em;
    letter-spacing: 0.2px;
}

p { margin: 0 0 1em; color: var(--color-text-muted); }

a { color: var(--color-brand); text-decoration: none; }
a:hover { text-decoration: underline; }

img, svg { display: block; max-width: 100%; }

.skip-link {
    position: absolute;
    left: -999px;
    top: 0;
    background: var(--color-brand);
    color: #fff;
    padding: 10px 16px;
    border-radius: 0 0 var(--radius-s) 0;
    z-index: 100;
}
.skip-link:focus { left: 0; }

:focus-visible {
    outline: 3px solid var(--color-brand);
    outline-offset: 2px;
}

/* ============================= Layout ============================= */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================= Header ============================= */
.site-header {
    border-bottom: 1px solid var(--color-border);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(6px);
    position: sticky;
    top: 0;
    z-index: 50;
}
.site-header__inner {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 24px;
}
.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.35rem;
    letter-spacing: 0.2px;
    flex: 1;
}
.brand:hover { text-decoration: none; }
.brand__mark {
    display: flex;
    color: var(--color-brand);
    flex-shrink: 0;
}
.main-nav {
    display: none;
    gap: 4px;
}
.main-nav a {
    color: var(--color-text-muted);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 10px 14px;
    border-radius: var(--radius-s);
}
.main-nav a:hover { background: var(--color-surface); text-decoration: none; color: var(--color-text); }
.main-nav a.is-active { color: var(--color-brand); background: var(--color-surface); }

.nav-toggle {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: var(--tap-min);
    height: var(--tap-min);
    background: none;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-s);
    cursor: pointer;
    flex-shrink: 0;
}
.nav-toggle span {
    width: 20px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
}
.mobile-nav {
    display: none;
    flex-direction: column;
    border-top: 1px solid var(--color-border);
    padding: 8px 12px 14px;
}
.mobile-nav.is-open {
    display: flex;
}
.mobile-nav a {
    color: var(--color-text);
    font-weight: 600;
    font-size: 1.05rem;
    padding: 14px 12px;
    border-radius: var(--radius-s);
    min-height: var(--tap-min);
    display: flex;
    align-items: center;
}
.mobile-nav a:hover { background: var(--color-surface); text-decoration: none; }

@media (min-width: 760px) {
    .main-nav { display: flex; }
    .nav-toggle { display: none; }
    .mobile-nav { display: none !important; }
}

/* ============================= Hero ============================= */
.hero {
    padding: 56px 0 40px;
    border-bottom: 1px solid var(--color-border);
    background:
        radial-gradient(80% 140% at 100% 0%, rgba(29, 94, 168, 0.06), transparent 60%),
        var(--color-bg);
}
.hero h1 {
    font-size: clamp(2.4rem, 6vw, 3.4rem);
    max-width: 16ch;
}
.hero p {
    font-size: 1.15rem;
    max-width: 56ch;
    margin-bottom: 0;
}

/* ============================= Category tiles (home) ============================= */
.tile-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    padding: 40px 0 64px;
}
@media (min-width: 640px) {
    .tile-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
}

.tile {
    display: flex;
    align-items: center;
    gap: 14px;
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-left: 6px solid var(--tile-color, var(--color-brand));
    border-radius: var(--radius-m);
    padding: 16px 18px;
    box-shadow: var(--shadow-card);
    color: var(--color-text);
    transition: transform 0.15s ease, box-shadow 0.15s ease, border-color 0.15s ease;
    min-height: 76px;
}
.tile:hover {
    text-decoration: none;
    transform: translateY(-2px);
    box-shadow: var(--shadow-raised);
}
.tile__icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-s);
    background: color-mix(in srgb, var(--tile-color, var(--color-brand)) 12%, white);
    color: var(--tile-color, var(--color-brand));
    display: flex;
    align-items: center;
    justify-content: center;
}
.tile__body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}
.tile__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.4rem;
    line-height: 1.1;
}
.tile__sub {
    color: var(--color-text-muted);
    font-size: 0.92rem;
    margin: 0;
}
.tile__count {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--tile-color, var(--color-brand));
}
.tile__arrow {
    flex-shrink: 0;
    color: var(--color-text-faint);
}

/* ============================= Category page ============================= */
.page-head {
    padding: 40px 0;
    border-bottom: 1px solid var(--color-border);
}
.page-head h1 {
    font-size: clamp(2rem, 5vw, 2.7rem);
    color: var(--color-text);
    margin-bottom: 0;
}
.page-head p { margin-bottom: 0; font-size: 1.05rem; }

.search-wrap {
    padding: 24px 0 8px;
    position: sticky;
    top: 65px;
    background: var(--color-bg);
    z-index: 10;
}
.search-field {
    position: relative;
}
.search-field input[type="search"] {
    width: 100%;
    font-family: var(--font-body);
    font-size: 1.05rem;
    padding: 15px 18px 15px 48px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-m);
    background: var(--color-surface);
    color: var(--color-text);
    min-height: var(--tap-min);
}
.search-field input[type="search"]:focus {
    background: #fff;
    border-color: var(--page-color, var(--color-brand));
}
.search-field svg {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-faint);
    pointer-events: none;
}
.search-meta {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--color-text-faint);
}

.doc-list {
    list-style: none;
    margin: 0;
    padding: 20px 0 72px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.doc-card {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-m);
    padding: 18px 20px;
    box-shadow: var(--shadow-card);
}
.doc-card__icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-s);
    background: color-mix(in srgb, var(--page-color, var(--color-brand)) 10%, white);
    color: var(--page-color, var(--color-brand));
    display: flex;
    align-items: center;
    justify-content: center;
}
.doc-card__body { flex: 1; min-width: 0; }
.doc-card__name {
    font-weight: 600;
    font-size: 1.05rem;
    color: var(--color-text);
    margin-bottom: 4px;
    overflow-wrap: anywhere;
}
.doc-card__meta {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 14px;
    font-size: 0.87rem;
    color: var(--color-text-muted);
}
.doc-card__actions {
    flex-shrink: 0;
    display: flex;
    gap: 8px;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}
.badge--valid { background: var(--status-valid-bg); color: var(--status-valid-text); }
.badge--expiring { background: var(--status-expiring-bg); color: var(--status-expiring-text); }
.badge--expired { background: var(--status-expired-bg); color: var(--status-expired-text); }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: var(--tap-min);
    padding: 0 20px;
    border-radius: var(--radius-s);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.98rem;
    border: 1.5px solid transparent;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn--primary { background: var(--page-color, var(--color-brand)); color: #fff; }
.btn--primary:hover { filter: brightness(0.92); }
.btn--outline { background: #fff; color: var(--color-text); border-color: var(--color-border-strong); }
.btn--outline:hover { background: var(--color-surface); }
.btn--danger { background: #fff; color: #9c2c14; border-color: #f0c9c0; }
.btn--danger:hover { background: var(--status-expired-bg); }
.btn--small { min-height: 40px; padding: 0 14px; font-size: 0.88rem; }
.btn--block { width: 100%; }

.empty-state {
    text-align: center;
    padding: 64px 20px;
    color: var(--color-text-faint);
}
.empty-state svg { margin: 0 auto 16px; color: var(--color-text-faint); }
.empty-state strong { display: block; color: var(--color-text-muted); font-size: 1.15rem; margin-bottom: 4px; }

/* ============================= Forms (admin) ============================= */
.card {
    background: var(--color-surface-raised);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-m);
    box-shadow: var(--shadow-card);
    padding: 26px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
}
@media (min-width: 640px) {
    .form-grid--upload { grid-template-columns: 1.4fr 1fr 1fr; }
}

.field label {
    display: block;
    font-weight: 600;
    font-size: 0.92rem;
    margin-bottom: 6px;
    color: var(--color-text);
}
.field .hint { font-size: 0.82rem; color: var(--color-text-faint); margin-top: 5px; }

.field select,
.field input[type="text"],
.field input[type="date"],
.field input[type="file"] {
    width: 100%;
    min-height: var(--tap-min);
    padding: 10px 14px;
    font-family: var(--font-body);
    font-size: 1rem;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    background: #fff;
    color: var(--color-text);
}
.field select:focus,
.field input:focus {
    border-color: var(--color-brand);
}

.alert {
    padding: 14px 18px;
    border-radius: var(--radius-s);
    font-weight: 600;
    font-size: 0.95rem;
    margin-bottom: 20px;
}
.alert--success { background: var(--status-valid-bg); color: var(--status-valid-text); }
.alert--error { background: var(--status-expired-bg); color: var(--status-expired-text); }

.admin-table-wrap { margin-top: 32px; }

.upload-queue {
    margin-top: 22px;
    padding-top: 18px;
    border-top: 1px solid var(--color-border);
}
.upload-queue__summary {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--color-text-muted);
    margin-bottom: 10px;
}
.upload-queue__list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 6px;
}
.upload-queue__row {
    display: flex;
    flex-direction: column;
    gap: 6px;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-s);
    font-size: 0.9rem;
    background: var(--color-surface);
}
.upload-queue__row-top {
    display: flex;
    align-items: center;
    gap: 10px;
}
.upload-queue__icon {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    font-weight: 700;
    background: #fff;
    border: 1.5px solid var(--color-border-strong);
    color: var(--color-text-faint);
}
.upload-queue__name {
    flex: 1 1 auto;
    min-width: 80px;
    overflow-wrap: anywhere;
    color: var(--color-text);
    font-weight: 500;
}
.upload-queue__status {
    color: var(--color-text-faint);
    overflow-wrap: anywhere;
}
.upload-queue__view {
    flex-shrink: 0;
    font-size: 0.82rem;
    font-weight: 600;
    padding: 5px 12px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: 999px;
    color: var(--color-text);
    text-decoration: none;
    white-space: nowrap;
}
.upload-queue__view:hover {
    background: #fff;
    border-color: var(--color-brand);
    color: var(--color-brand);
    text-decoration: none;
}
.upload-queue__row.is-uploading .upload-queue__icon {
    border-color: var(--color-brand);
    color: var(--color-brand);
}
.upload-queue__row.is-done {
    background: var(--status-valid-bg);
}
.upload-queue__row.is-done .upload-queue__icon {
    background: var(--status-valid-text);
    border-color: var(--status-valid-text);
    color: #fff;
}
.upload-queue__row.is-done .upload-queue__status { color: var(--status-valid-text); }
.upload-queue__row.is-error {
    background: var(--status-expired-bg);
}
.upload-queue__row.is-error .upload-queue__icon {
    background: var(--status-expired-text);
    border-color: var(--status-expired-text);
    color: #fff;
}
.upload-queue__row.is-error .upload-queue__status {
    color: var(--status-expired-text);
}
.upload-queue__error-text {
    display: block;
    margin-bottom: 8px;
}
.upload-queue__retry {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-wrap: wrap;
}
.upload-queue__retry label {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--color-text-muted);
}
.upload-queue__retry input[type="date"] {
    min-height: 38px;
    padding: 5px 8px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    font-size: 0.85rem;
    background: #fff;
}
.upload-queue__retry button {
    font-family: var(--font-body);
    font-size: 0.82rem;
    font-weight: 600;
    padding: 7px 14px;
    border-radius: 999px;
    border: 1.5px solid var(--color-brand);
    background: var(--color-brand);
    color: #fff;
    cursor: pointer;
}
.upload-queue__retry button:hover {
    filter: brightness(0.92);
}

.upload-queue__row.is-duplicate {
    background: var(--status-expiring-bg);
}
.upload-queue__row.is-duplicate .upload-queue__icon {
    background: var(--status-expiring-text);
    border-color: var(--status-expiring-text);
    color: #fff;
}
.upload-queue__row.is-duplicate .upload-queue__status {
    color: var(--status-expiring-text);
    overflow-wrap: anywhere;
}
.upload-queue__dup-actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 8px;
}
.upload-queue__dup-actions button {
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    padding: 6px 12px;
    border-radius: 999px;
    border: 1.5px solid var(--color-border-strong);
    background: #fff;
    color: var(--color-text);
    cursor: pointer;
}
.upload-queue__dup-actions button:hover {
    background: var(--color-surface);
}
.upload-queue__dup-actions button[data-action="rename"] {
    border-color: var(--color-brand);
    color: var(--color-brand);
}
.upload-queue__dup-actions button[data-action="overwrite"] {
    border-color: #e3a68f;
    color: #9c2c14;
}
.upload-queue__dup-actions button[data-action="overwrite"]:hover {
    background: var(--status-expired-bg);
}
.upload-queue__row.is-skipped {
    opacity: 0.6;
}
.admin-filter {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.admin-filter input[type="search"] {
    flex: 1;
    min-width: 200px;
    min-height: var(--tap-min);
    padding: 10px 14px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    font-size: 1rem;
}
.admin-filter select {
    min-height: var(--tap-min);
    padding: 10px 14px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    font-size: 1rem;
    background: #fff;
}

.bulk-bar {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-m);
    padding: 14px 16px;
    margin-bottom: 18px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.bulk-bar__row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}
.bulk-bar__select-all {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
}
.bulk-bar__select-all input {
    width: 20px;
    height: 20px;
    cursor: pointer;
}
.bulk-bar__count {
    font-weight: 600;
    color: var(--color-text-muted);
    font-size: 0.88rem;
}
.bulk-bar__actions {
    display: flex;
    align-items: flex-end;
    gap: 16px;
    flex-wrap: wrap;
}
.bulk-bar__group {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.bulk-bar__group > label:first-child {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
}
.bulk-bar__group input[type="date"],
.bulk-bar__group select {
    min-height: 42px;
    padding: 6px 10px;
    border: 1.5px solid var(--color-border-strong);
    border-radius: var(--radius-s);
    font-size: 0.9rem;
    background: #fff;
}
.bulk-bar__clear {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.78rem;
    color: var(--color-text-faint);
    margin-top: 2px;
    cursor: pointer;
}
.bulk-bar__clear input {
    width: 14px;
    height: 14px;
}
.bulk-bar__group--buttons {
    flex-direction: row;
    gap: 10px;
}
.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.admin-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-m);
    margin-bottom: 10px;
    background: #fff;
}
.admin-row__select {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: var(--tap-min);
}
.admin-row__select input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}
.admin-row__cat {
    flex-shrink: 0;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    padding: 4px 10px;
    border-radius: 999px;
    color: #fff;
    background: var(--row-color, var(--color-brand));
}
.admin-row__name { font-weight: 600; flex: 1 1 220px; min-width: 0; overflow-wrap: anywhere; }
.admin-row__dates {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    flex: 1 1 260px;
}
.admin-row__dates form {
    display: flex;
    align-items: center;
    gap: 6px;
}
.admin-row__dates input[type="date"] {
    min-height: 38px;
    padding: 4px 8px;
    font-size: 0.85rem;
    border: 1px solid var(--color-border-strong);
    border-radius: 6px;
}
.admin-row__actions { display: flex; gap: 8px; flex-shrink: 0; margin-left: auto; }

.section-title {
    font-size: 1.6rem;
    margin-bottom: 6px;
}
.section-sub { color: var(--color-text-muted); margin-bottom: 24px; }

/* ============================= Utility ============================= */
.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

@media (prefers-reduced-motion: reduce) {
    * { transition: none !important; animation: none !important; }
}