/* ==========================================================================
   ATLANTIS — Explorer mode: the Nereid's bridge, split view and helm view
   ========================================================================== */

/* ---------- view switch ---------- */
.view-switch {
    position: absolute; top: 122px; left: 50%; transform: translateX(-50%); z-index: 8;
    display: flex; padding: 3px; gap: 2px;
    background: linear-gradient(180deg, #2a1c08, #120c03);
    border: 1px solid var(--brass); border-radius: 20px;
    box-shadow: 0 6px 18px rgba(0, 0, 0, .55), inset 0 1px 0 rgba(239, 211, 142, .25);
}
.view-switch button {
    border: 0; background: none; cursor: pointer; padding: 4px 14px 3px; border-radius: 16px;
    font-family: var(--f-display); letter-spacing: .12em; font-size: .85rem; color: var(--ink);
}
.view-switch button.on { color: var(--brass-dk); background: linear-gradient(180deg, var(--brass-hi), var(--brass) 60%, var(--brass-lo)); }
.view-switch button:hover:not(.on):not(:disabled) { color: var(--parchment); background: rgba(196, 154, 74, .15); }
.view-switch button:disabled { opacity: .4; cursor: default; }
.view-switch button:focus-visible { outline: 2px solid var(--biolum); outline-offset: 1px; }
.mode-split .view-switch, .mode-helm .view-switch { top: 8px; }

/* ---------- launch button ---------- */
.launch-btn {
    width: 100%; margin: 2px 0 12px; padding: 10px 12px 9px; cursor: pointer;
    display: grid; justify-items: center; gap: 2px;
    font-family: var(--f-display); letter-spacing: .12em; font-size: 1.05rem;
    color: var(--parchment);
    background: linear-gradient(180deg, rgba(79, 163, 146, .45), rgba(36, 86, 77, .6));
    border: 1px solid var(--verdigris); border-radius: 3px;
    box-shadow: 0 0 18px rgba(95, 245, 225, .15), inset 0 1px 0 rgba(255, 255, 255, .15);
}
.launch-btn small { font-family: var(--f-italic); font-style: italic; letter-spacing: 0; font-size: .82rem; color: var(--ink); }
.launch-btn:hover:not(:disabled) { box-shadow: 0 0 24px rgba(95, 245, 225, .35); }
.launch-btn:disabled { opacity: .45; }

/* ---------- layouts ---------- */
.explorer-pane {
    position: absolute; top: 0; left: 0; bottom: 30px; width: 50%; z-index: 1;
    background: #010b10;
}
.mode-chart .explorer-pane { visibility: hidden; pointer-events: none; }
.mode-split .explorer-pane { border-right: 3px solid var(--brass-lo); box-shadow: 3px 0 0 rgba(239, 211, 142, .25), 10px 0 30px rgba(0, 0, 0, .6); }
.mode-split .globe-host, .mode-split .label-layer, .mode-split .porthole { left: 50%; }
.mode-split .cartouche { left: 75%; top: 44px; transform: translateX(-50%) scale(.62); transform-origin: top center; }
.mode-split .cartouche-kicker { display: none; }
.mode-split .readout { left: 75%; }
.mode-split .refining { left: 75%; top: 112px; }

.mode-helm .explorer-pane { width: 100%; }
.mode-helm .cartouche, .mode-helm .readout, .mode-helm .label-layer, .mode-helm .porthole, .mode-helm .refining { display: none; }
.mode-helm .globe-host {
    inset: auto; top: 46px; right: 16px; width: 240px; height: 240px; z-index: 4;
    border-radius: 50%; overflow: hidden;
    background: radial-gradient(circle, #06343f, #010b10);
    box-shadow: 0 0 0 5px var(--brass), 0 0 0 7px var(--brass-dk), 0 0 0 9px rgba(239, 211, 142, .35), 0 10px 30px rgba(0, 0, 0, .7);
}

/* ---------- explorer ---------- */
.explorer, .explorer-stage { position: absolute; inset: 0; }
.explorer-canvas { display: block; width: 100%; height: 100%; outline: none; cursor: grab; touch-action: none; }
.explorer-canvas:active { cursor: grabbing; }

.hud { position: absolute; inset: 0; pointer-events: none; font-family: var(--f-mono); color: var(--parchment); overflow: hidden; }
.hud button { pointer-events: auto; }
.hud kbd {
    font-family: var(--f-mono); font-size: .7rem; padding: 0 4px; border-radius: 3px;
    border: 1px solid rgba(212, 199, 163, .4); background: rgba(0, 0, 0, .35); color: var(--ink);
}

/* compass */
.hud-compass { position: absolute; top: 48px; left: 50%; transform: translateX(-50%); width: min(340px, 46%); text-align: center; }
.hud-compass-window {
    position: relative; height: 26px; overflow: hidden;
    mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
    -webkit-mask-image: linear-gradient(90deg, transparent, #000 18%, #000 82%, transparent);
    border-bottom: 1px solid rgba(95, 245, 225, .5);
}
.hud-compass-strip { position: absolute; left: 50%; top: 0; height: 100%; will-change: transform; }
.hud-compass-strip .tick {
    position: absolute; bottom: 0; transform: translateX(-50%);
    font-size: .72rem; color: rgba(236, 223, 191, .7); padding-bottom: 6px;
}
.hud-compass-strip .tick::after { content: ""; position: absolute; left: 50%; bottom: 0; width: 1px; height: 4px; background: rgba(95, 245, 225, .6); }
.hud-compass-strip .tick.major { color: var(--biolum); font-size: .85rem; text-shadow: 0 0 6px var(--biolum-dim); }
.hud-compass-strip .tick.major::after { height: 7px; }
.hud-compass-caret { width: 0; height: 0; margin: 0 auto; border: 6px solid transparent; border-top-color: var(--brass-hi); }
.hud-heading { font-size: .95rem; color: var(--brass-hi); text-shadow: 0 1px 3px #000; }

/* status */
.hud-status {
    position: absolute; top: 44px; left: 12px; width: 236px; padding: 10px 12px;
    background: rgba(2, 18, 24, .66); border: 1px solid rgba(95, 245, 225, .35); border-radius: 6px;
    box-shadow: 0 0 18px rgba(95, 245, 225, .08), inset 0 0 14px rgba(95, 245, 225, .06);
}
.hud-medium {
    display: inline-block; padding: 1px 8px; border-radius: 10px; font-size: .75rem; letter-spacing: .14em;
    border: 1px solid currentColor;
}
.hud-medium[data-state=sub] { color: #8fd8ff; box-shadow: 0 0 10px rgba(143, 216, 255, .3); }
.hud-medium[data-state=air] { color: var(--sand); }
.hud-status dl { display: grid; grid-template-columns: auto 1fr; gap: 2px 10px; margin: 8px 0 0; font-size: .78rem; }
.hud-status dt { color: var(--ink-muted); font-family: var(--f-body); font-size: .85rem; }
.hud-status dd { margin: 0; text-align: right; color: var(--biolum); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.hud-status dd.big { font-size: 1.25rem; color: var(--parchment); }

/* bathymeter */
.hud-bathy {
    position: absolute; left: 22px; top: 400px; bottom: 170px; width: 10px; border-radius: 5px; overflow: hidden;
    background: linear-gradient(180deg, rgba(207, 214, 191, .25), rgba(95, 245, 225, .25) 40%, rgba(2, 18, 30, .8));
    border: 1px solid rgba(95, 245, 225, .35);
}
.bathy-sea, .bathy-ground { position: absolute; left: 0; right: 0; height: 2px; }
.bathy-sea { background: var(--biolum); box-shadow: 0 0 6px var(--biolum); }
.bathy-ground { background: #b07a3c; }
.bathy-ground::after { content: ""; position: absolute; left: 0; right: 0; top: 2px; height: 2000px; background: repeating-linear-gradient(135deg, rgba(176, 122, 60, .7) 0 3px, rgba(60, 40, 20, .7) 3px 6px); }
.bathy-ship { position: absolute; left: 50%; transform: translate(-50%, -50%); color: var(--brass-hi); font-size: .8rem; line-height: 1; text-shadow: 0 0 4px #000; z-index: 1; }

/* warnings */
.hud-warn {
    position: absolute; top: 28%; left: 50%; transform: translateX(-50%);
    padding: 4px 14px; font-size: 1rem; letter-spacing: .2em; color: #ffd7cf;
    background: rgba(120, 20, 8, .7); border: 1px solid var(--rust); border-radius: 4px;
    animation: warn 0.8s steps(2) infinite;
}
.hud-warn[hidden] { display: none; }
@keyframes warn { 50% { opacity: .35; } }

/* engine telegraph */
.hud-telegraph { position: absolute; left: 12px; bottom: 12px; display: grid; gap: 6px; width: 236px; }
.telegraph-dial {
    padding: 8px 12px; text-align: center; border-radius: 40px 40px 6px 6px;
    background: radial-gradient(circle at 50% 120%, #f1e3c0, #d9c693 70%);
    color: #2c1f0d; border: 3px solid var(--brass); box-shadow: 0 0 0 2px var(--brass-dk), 0 8px 20px rgba(0, 0, 0, .55);
}
.telegraph-label { font-family: var(--f-display); font-size: .72rem; letter-spacing: .18em; color: #6b4718; }
.telegraph-value { font-family: var(--f-display); font-size: 1.35rem; letter-spacing: .14em; color: #7a2a17; }
.telegraph-value[data-level="0"] { color: #2c4a7a; }
.telegraph-buttons { display: grid; grid-template-columns: repeat(5, 1fr); gap: 3px; }
.telegraph-buttons button, .sonar-buttons button, .hud-detail {
    padding: 4px 2px; cursor: pointer; font-family: var(--f-display); font-size: .72rem; letter-spacing: .06em;
    color: var(--ink); background: rgba(2, 18, 24, .72); border: 1px solid rgba(196, 154, 74, .6); border-radius: 3px;
}
.telegraph-buttons button:hover, .sonar-buttons button:hover, .hud-detail:hover { color: var(--parchment); border-color: var(--brass-hi); }
.hud button:focus-visible { outline: 2px solid var(--biolum); outline-offset: 1px; }

/* sonar */
.hud-sonar { position: absolute; right: 12px; bottom: 12px; display: flex; align-items: flex-end; gap: 8px; }
.scope-bezel {
    position: relative; width: 236px; height: 236px; padding: 8px; border-radius: 50%;
    background: radial-gradient(circle at 35% 30%, var(--brass-hi), var(--brass) 45%, var(--brass-lo) 80%);
    box-shadow: 0 0 0 2px var(--brass-dk), 0 10px 30px rgba(0, 0, 0, .6);
}
.scope-bezel canvas {
    display: block; width: 220px; height: 220px; border-radius: 50%;
    background: radial-gradient(circle, #04261f, #010a08);
    box-shadow: inset 0 0 26px #000, inset 0 0 6px rgba(95, 245, 225, .4);
}
.scope-title { position: absolute; left: 50%; bottom: -2px; transform: translateX(-50%); font-family: var(--f-display); font-size: .7rem; letter-spacing: .25em; color: var(--brass-dk); background: var(--brass); padding: 0 8px; border-radius: 6px; }
.sonar-buttons { display: grid; gap: 4px; width: 96px; }
.sonar-buttons button { padding: 5px 6px; display: flex; justify-content: space-between; align-items: center; gap: 4px; }
.sonar-buttons .ping { color: var(--abyss); background: linear-gradient(180deg, #a6fff2, var(--biolum)); border-color: var(--biolum); box-shadow: 0 0 12px rgba(95, 245, 225, .45); }
.sonar-buttons .ping kbd { color: var(--abyss); border-color: rgba(2, 18, 26, .5); background: rgba(255, 255, 255, .3); }
.sonar-buttons button[data-on=true], .hud-detail[data-on=true] { color: var(--biolum); border-color: var(--biolum); box-shadow: 0 0 8px rgba(95, 245, 225, .3); }

.hud-detail { position: absolute; left: 50%; bottom: 12px; transform: translateX(-50%); padding: 3px 10px; font-family: var(--f-mono); font-size: .7rem; letter-spacing: .04em; opacity: .8; }

/* help card */
.hud-help {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: min(400px, calc(100% - 32px)); max-height: calc(100% - 32px); pointer-events: auto;
    display: flex; flex-direction: column; overflow: hidden;
    background: linear-gradient(180deg, #efe3c4, #dccb9f); color: #2c1f0d;
    font-family: var(--f-body); border: 1px solid var(--brass-dk);
    box-shadow: inset 0 0 40px rgba(120, 80, 20, .35), 0 16px 40px rgba(0, 0, 0, .6);
}
.hud-help[hidden] { display: none; }
.hud-help-head {
    flex: none; display: flex; align-items: center; justify-content: space-between; gap: 12px;
    padding: 10px 12px 8px 20px; border-bottom: 1px solid rgba(58, 37, 11, .3);
}
.hud-help h3 { margin: 0; font-family: var(--f-display); font-weight: 400; letter-spacing: .1em; color: #3a250b; }
.hud-help-body {
    flex: 1 1 auto; min-height: 0; overflow-y: auto; overscroll-behavior: contain;
    margin: 0; padding: 10px 16px 14px 38px; line-height: 1.55; font-size: .95rem;
    scrollbar-width: thin; scrollbar-color: rgba(58, 37, 11, .5) transparent;
}
.hud-help-body::-webkit-scrollbar { width: 8px; }
.hud-help-body::-webkit-scrollbar-thumb { background: rgba(58, 37, 11, .45); border-radius: 4px; }
.hud-help kbd { color: #2c1f0d; border-color: rgba(58, 37, 11, .5); background: rgba(255, 255, 255, .35); }
.hud-help-close {
    flex: none; width: 28px; height: 28px; border: 0; background: none; padding: 0;
    font-size: 1.4rem; line-height: 1; cursor: pointer; color: #3a250b;
}
.hud-help-close:hover { color: #000; background: rgba(58, 37, 11, .12); }

.hud-overlay { position: absolute; inset: 0; display: grid; place-items: center; background: rgba(1, 8, 11, .72); pointer-events: auto; }
.hud-overlay[hidden] { display: none; }
.hud-overlay-card { font-family: var(--f-display); letter-spacing: .1em; color: var(--brass-hi); font-size: 1.2rem; animation: breathe 1.6s ease-in-out infinite; text-align: center; padding: 0 16px; }

/* pilot's log (in the Expedition Log panel) */
.pilot-log h3 { margin-top: 0; }
.pilot-log dl { display: grid; grid-template-columns: 1fr auto; gap: 2px 10px; margin: 6px 0; font-size: .92rem; }
.pilot-log dt { color: var(--ink-muted); }
.pilot-log dd { margin: 0; font-family: var(--f-mono); color: var(--parchment); text-align: right; }
.sightings { list-style: none; margin: 8px 0 0; padding: 0; max-height: 180px; overflow-y: auto; font-size: .92rem; }
.sightings li { padding: 3px 0; border-bottom: 1px dotted rgba(196, 154, 74, .3); line-height: 1.3; }
.sightings time { font-family: var(--f-mono); font-size: .78rem; color: var(--brass); margin-right: 4px; }
.pilot-actions { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; justify-content: space-between; margin: 8px 0 14px; padding-bottom: 10px; border-bottom: 1px solid rgba(196, 154, 74, .35); }

/* ---------- narrow screens ---------- */
@media (max-width: 900px) {
    .view-switch { top: 74px; }
    .mode-split .explorer-pane { width: 100%; height: 55%; bottom: auto; border-right: 0; border-bottom: 3px solid var(--brass-lo); }
    .mode-split .globe-host, .mode-split .label-layer, .mode-split .porthole { left: 0; top: 55%; }
    .mode-split .cartouche { display: none; }
    .mode-split .readout { left: 50%; }
    .mode-helm .globe-host { width: 150px; height: 150px; top: 46px; right: 10px; }
    .hud-status { width: 180px; padding: 6px 8px; }
    .hud-status dl dt:nth-of-type(n+4), .hud-status dl dd:nth-of-type(n+4) { display: none; }
    .hud-bathy, .hud-detail { display: none; }
    .hud-survey { top: auto; bottom: 120px; width: 190px; }
    .mode-split .map-zoom { bottom: 44px; }
    .mode-helm .map-zoom { top: 150px; }
    .hud-compass { top: 44px; }
    .scope-bezel { width: 140px; height: 140px; padding: 6px; }
    .scope-bezel canvas { width: 128px; height: 128px; }
    .hud-telegraph { width: 190px; }
    .telegraph-dial { display: none; }
}

/* survey scale + sun */
.hud-survey {
    position: absolute; top: 290px; left: 12px; width: 236px; padding: 8px 10px; pointer-events: auto;
    background: rgba(2, 18, 24, .66); border: 1px solid rgba(196, 154, 74, .5); border-radius: 6px;
}
.survey-row { display: flex; justify-content: space-between; align-items: baseline; gap: 8px; }
.survey-label { font-family: var(--f-display); font-size: .78rem; letter-spacing: .12em; color: var(--brass-hi); }
.survey-speed { font-size: .68rem; color: var(--biolum); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.survey-scales { display: grid; grid-template-columns: repeat(4, 1fr); gap: 3px; margin: 6px 0; }
.survey-scales button {
    padding: 3px 0; cursor: pointer; font-family: var(--f-mono); font-size: .78rem;
    color: var(--ink); background: rgba(2, 18, 24, .72); border: 1px solid rgba(196, 154, 74, .55); border-radius: 3px;
}
.survey-scales button.on { color: var(--brass-dk); background: linear-gradient(180deg, var(--brass-hi), var(--brass) 60%, var(--brass-lo)); border-color: var(--brass-dk); }
.survey-sun { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 8px; font-family: var(--f-body); font-size: .85rem; color: var(--ink-muted); }
.survey-sun input { width: 100%; accent-color: var(--brass); }
.survey-sun-val { font-family: var(--f-mono); font-size: .78rem; color: var(--parchment); min-width: 2.5em; text-align: right; }

/* sonar range stepper */
.sonar-range { display: grid; grid-template-columns: 22px 1fr 22px; align-items: center; gap: 3px; }
.sonar-range span { text-align: center; font-family: var(--f-mono); font-size: .74rem; color: var(--biolum); }
.sonar-range button { padding: 3px 0 !important; justify-content: center !important; font-family: var(--f-mono) !important; font-size: .85rem !important; }
.scope-title { white-space: nowrap; }
.scope-title span { font-family: var(--f-mono); letter-spacing: .04em; }

/* chart zoom buttons — bottom-right corner of the chart in every view */
.map-zoom {
    position: absolute; right: 16px; bottom: 44px; z-index: 7;
    display: grid; gap: 4px;
}
.map-zoom button {
    width: 34px; height: 34px; cursor: pointer; padding: 0;
    font-family: var(--f-mono); font-size: 1.25rem; line-height: 1; color: var(--brass-dk);
    background: radial-gradient(circle at 35% 30%, var(--brass-hi), var(--brass) 55%, var(--brass-lo));
    border: 1px solid var(--brass-dk); border-radius: 50%;
    box-shadow: 0 3px 10px rgba(0, 0, 0, .55), inset 0 1px 0 rgba(255, 255, 255, .35);
}
.map-zoom button:hover { filter: brightness(1.1); }
.map-zoom button:active { transform: translateY(1px); }
.map-zoom button:focus-visible { outline: 2px solid var(--biolum); outline-offset: 2px; }
.mode-chart .map-zoom { bottom: 104px; }                 /* clear of the hover readout and the Log panel */
.mode-helm .map-zoom { top: 214px; right: 10px; bottom: auto; grid-auto-flow: row; }
.mode-helm .map-zoom button { width: 28px; height: 28px; font-size: 1.05rem; }

/* "take the helm" hint (hidden while the pointer is locked) */
.hud-lock {
    position: absolute; left: 50%; top: 112px; transform: translateX(-50%);
    padding: 4px 14px; border-radius: 14px; white-space: nowrap;
    font-family: var(--f-body); font-size: .9rem; color: var(--parchment);
    background: rgba(2, 18, 24, .7); border: 1px solid rgba(239, 211, 142, .5);
    animation: breathe 2.6s ease-in-out infinite;
}
.hud-lock[hidden] { display: none; }
.sonar-buttons { width: 100px; }

@media (prefers-reduced-motion: reduce) {
    .hud-warn, .hud-overlay-card, .hud-lock { animation: none; }
}

/* view selector (third person / cockpit) */
.survey-views { display: grid; grid-template-columns: 1fr 1fr; gap: 3px; margin: 6px 0 8px; }
.survey-views button {
    padding: 3px 0; cursor: pointer; font-family: var(--f-display); font-size: .74rem; letter-spacing: .06em;
    color: var(--ink); background: rgba(2, 18, 24, .72); border: 1px solid rgba(196, 154, 74, .55); border-radius: 3px;
}
.survey-views button.on { color: var(--brass-dk); background: linear-gradient(180deg, var(--brass-hi), var(--brass) 60%, var(--brass-lo)); border-color: var(--brass-dk); }
.survey-views button:hover:not(.on) { color: var(--parchment); border-color: var(--brass-hi); }

/* cockpit: centre reticle while looking about, and the "E" prompt */
.hud-reticle {
    position: absolute; left: 50%; top: 50%; width: 6px; height: 6px; margin: -3px 0 0 -3px; border-radius: 50%;
    background: rgba(239, 211, 142, .75); box-shadow: 0 0 0 1px rgba(0, 0, 0, .6);
    transition: transform .12s ease, background-color .12s ease;
}
.hud-reticle[data-aim=true] { background: var(--biolum); transform: scale(1.6); box-shadow: 0 0 0 1px rgba(0, 0, 0, .6), 0 0 10px var(--biolum); }
.hud-reticle[hidden], .hud-prompt[hidden] { display: none; }
.hud-prompt {
    position: absolute; left: 50%; top: calc(50% + 26px); transform: translateX(-50%);
    padding: 4px 12px; border-radius: 14px; white-space: nowrap;
    font-family: var(--f-display); font-size: .85rem; letter-spacing: .1em; color: var(--parchment);
    background: rgba(2, 18, 24, .75); border: 1px solid var(--biolum); box-shadow: 0 0 10px rgba(95, 245, 225, .3);
}
.hud-prompt[data-helm=true] { top: auto; bottom: 46px; opacity: .7; border-color: rgba(196, 154, 74, .6); box-shadow: none; font-size: .75rem; }
@media (prefers-reduced-motion: reduce) { .hud-reticle { transition: none; } }

/* Overdrive (Shift at the helm) */
.telegraph-value[data-level="od"] { color: #b3260f; text-shadow: 0 0 8px rgba(255, 120, 40, .55); animation: overdrive .5s ease-in-out infinite alternate; }
@keyframes overdrive { to { color: #e0461c; text-shadow: 0 0 14px rgba(255, 150, 60, .9); } }
@media (prefers-reduced-motion: reduce) { .telegraph-value[data-level="od"] { animation: none; } }