/* ============================================================
   Fiber Corridor Business Finder — styles
   Design tokens and visual language per build spec §5.2.
   ============================================================ */

:root {
    --navy:       #12283F; /* header background, primary dark surfaces          */
    --navy-2:     #1B3A5C; /* buttons, table header, secondary accents          */
    --amber:      #F2A340; /* route line, download button, brand accent (fiber) */
    --amber-glow: rgba(242, 163, 64, 0.55); /* soft glow around the route line  */
    --cyan:       #4FD1C5; /* buffer corridor overlay (translucent)             */
    --bg:         #F5F7F9; /* page background                                   */
    --surface:    #FFFFFF; /* cards, sidebar, table background                  */
    --text:       #1B2430; /* primary text                                     */
    --text-muted: #667085; /* secondary / hint text                            */
    --border:     #E3E7EC; /* hairline borders / dividers                      */
    --success:    #2E7D4F; /* success status messages                          */
    --danger:     #B3413B; /* error status messages, destructive buttons       */

    --font-display: "Space Grotesk", system-ui, sans-serif;
    --font-body:    "Inter", system-ui, sans-serif;
    --font-mono:    "JetBrains Mono", ui-monospace, monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    font-size: 15px;
    line-height: 1.5;
}

/* ===================== Header ===================== */
.app-header {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 22px;
    background: var(--navy);
    color: #fff;
}
.app-header__mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: rgba(255, 255, 255, 0.06);
    box-shadow: 0 0 18px var(--amber-glow);
    flex: none;
}
.app-header__title {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.25rem;
    margin: 0;
    letter-spacing: 0.2px;
}
.app-header__tagline {
    margin: 2px 0 0;
    font-size: 0.85rem;
    color: #B7C4D4;
}

/* ===================== Layout ===================== */
.layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    grid-template-areas:
        "map sidebar"
        "results results";
    gap: 16px;
    padding: 16px;
    align-items: start;
}
.map-panel   { grid-area: map; }
.sidebar     { grid-area: sidebar; display: flex; flex-direction: column; gap: 14px; }
.results-panel { grid-area: results; }

#map {
    height: 620px;
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 1px 3px rgba(18, 40, 63, 0.06);
}

/* ===================== Cards ===================== */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 14px 16px;
    box-shadow: 0 1px 3px rgba(18, 40, 63, 0.05);
}
.card__title {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.82rem;
    text-transform: uppercase;
    letter-spacing: 0.6px;
    color: var(--text-muted);
    margin: 0 0 12px;
}

/* ===================== Buttons ===================== */
.btn {
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid transparent;
    border-radius: 9px;
    padding: 9px 14px;
    cursor: pointer;
    transition: background 0.15s, border-color 0.15s, opacity 0.15s;
}
.btn:disabled { opacity: 0.45; cursor: not-allowed; }
.btn:focus-visible { outline: 3px solid rgba(79, 209, 197, 0.6); outline-offset: 2px; }

.btn--block { display: block; width: 100%; }
.btn--primary   { background: var(--navy-2); color: #fff; }
.btn--primary:not(:disabled):hover   { background: #234b73; }
.btn--secondary { background: #EEF2F6; color: var(--navy-2); border-color: var(--border); margin-top: 8px; }
.btn--secondary:not(:disabled):hover { background: #E3EAF1; }
.btn--ghost     { background: transparent; color: var(--navy-2); border-color: var(--border); }
.btn--ghost:not(:disabled):hover     { background: #F0F3F6; }
.btn--amber     { background: var(--amber); color: #3a2600; margin-top: 8px; box-shadow: 0 0 0 rgba(242,163,64,0); }
.btn--amber:not(:disabled)           { box-shadow: 0 2px 12px var(--amber-glow); }
.btn--amber:not(:disabled):hover     { background: #e79626; }

.btn-row { display: flex; gap: 8px; }
.btn-row .btn { flex: 1; }

/* ===================== Status lines / box ===================== */
.status-line {
    margin: 10px 0 0;
    font-size: 0.82rem;
    color: var(--text-muted);
}
.status-box {
    margin: 10px 0;
    padding: 10px 12px;
    border-radius: 9px;
    font-size: 0.84rem;
    border: 1px solid var(--border);
    background: #F1F4F7;
    color: var(--text);
    white-space: pre-wrap;
    word-break: break-word;
}
.status-box--loading { background: #EEF4FB; border-color: #CFE0F1; color: var(--navy-2); }
.status-box--success { background: #EAF5EE; border-color: #BFE2CC; color: var(--success); }
.status-box--error   { background: #FBEDEC; border-color: #E8C7C4; color: var(--danger); }
.status-box .mirror-line { font-family: var(--font-mono); font-size: 0.78rem; display: block; }

/* Inline spinner for the loading state (§5.13) */
.spinner {
    display: inline-block;
    width: 13px; height: 13px;
    margin-right: 7px;
    vertical-align: -2px;
    border: 2px solid rgba(27, 58, 92, 0.25);
    border-top-color: var(--navy-2);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }
@media (prefers-reduced-motion: reduce) {
    .spinner { animation: none; }
}

/* ===================== Slider / readout ===================== */
.slider { width: 100%; accent-color: var(--navy-2); }
.readout { margin: 8px 0 0; font-size: 0.85rem; color: var(--text-muted); }
.readout__num { font-family: var(--font-mono); font-weight: 500; color: var(--text); font-size: 1rem; }

/* ===================== Categories ===================== */
.category-list { display: flex; flex-direction: column; gap: 9px; }
.category-item { display: flex; align-items: center; gap: 9px; font-size: 0.9rem; cursor: pointer; }
.category-item input { width: 16px; height: 16px; accent-color: var(--navy-2); }

/* ===================== Saved searches ===================== */
.saved-list { list-style: none; margin: 12px 0 0; padding: 0; display: flex; flex-direction: column; gap: 8px; }
.saved-item {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: 9px;
    background: #FAFBFC;
}
.saved-item__main { flex: 1; min-width: 0; cursor: pointer; text-align: left; background: none; border: none; padding: 0; font: inherit; color: inherit; }
.saved-item__name { display: block; font-weight: 600; font-size: 0.86rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.saved-item__meta { display: block; font-size: 0.74rem; color: var(--text-muted); font-family: var(--font-mono); }
.saved-item__del {
    flex: none; width: 24px; height: 24px; border-radius: 6px;
    border: 1px solid var(--border); background: #fff; color: var(--danger);
    cursor: pointer; font-size: 0.9rem; line-height: 1;
}
.saved-item__del:hover { background: #FBEDEC; }

/* ===================== Results table ===================== */
.results-panel { min-height: 60px; }
.results-empty {
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: 12px;
    padding: 28px;
    text-align: center;
    color: var(--text-muted);
    margin: 0;
}
.results-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
    font-size: 0.88rem;
}
.results-table thead th {
    background: var(--navy-2);
    color: #fff;
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.8rem;
    text-align: left;
    padding: 11px 12px;
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
}
.results-table thead th:hover { background: #234b73; }
.results-table thead th::after { content: ""; margin-left: 6px; opacity: 0.7; font-size: 0.7rem; }
.results-table thead th.sort-asc::after  { content: "▲"; }
.results-table thead th.sort-desc::after { content: "▼"; }
.results-table thead th:focus-visible { outline: 3px solid var(--cyan); outline-offset: -3px; }
.results-table tbody td { padding: 9px 12px; border-top: 1px solid var(--border); vertical-align: top; }
.results-table tbody tr:nth-child(even) { background: #FAFBFC; }
.results-table a { color: var(--navy-2); }

/* Category pill badge (§5.9) */
.pill {
    display: inline-block;
    padding: 2px 9px;
    border-radius: 999px;
    background: #E8F6F4;
    color: #12726A;
    font-size: 0.74rem;
    font-weight: 600;
    white-space: nowrap;
}

/* ===================== Leaflet route markers / glow ===================== */
/* Signature visual (§5.2): the drawn route glows amber like light in fiber glass. */
.route-glow {
    filter: drop-shadow(0 0 5px var(--amber-glow)) drop-shadow(0 0 9px var(--amber-glow));
}
.route-point {
    width: 12px; height: 12px;
    background: var(--amber);
    border: 2px solid var(--navy);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--amber-glow);
}

/* ===================== Responsive (≤880px) ===================== */
@media (max-width: 880px) {
    .layout {
        grid-template-columns: 1fr;
        grid-template-areas:
            "map"
            "sidebar"
            "results";
    }
    #map { height: 380px; }
}