/* ==========================================================================
   1. Global Variables
   ========================================================================== */

:root {
    --bg-popup: rgba(0, 0, 0, 0.9);
    --bg-btn: rgba(255, 255, 255, 0.2);
    --bg-btn-hover: rgba(255, 255, 255, 0.4);

    --text-light: white;

    --border-light: 1px solid rgba(255, 255, 255, 0.3);
    --border-btn: 1px solid rgba(255, 255, 255, 0.5);

    --radius-container: 15px;
    --radius-btn: 5px;
}

/* ==========================================================================
   2. Help popup
   ========================================================================== */

/* Height capped so the help text scrolls and the language row and Close button
   stay inside the frame; toggleHelp() shows it as flex. */
#help-popup {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80%;
    max-width: 600px;
    max-height: calc(100vh - 40px);
    max-height: calc(100dvh - 40px);
    box-sizing: border-box;
    flex-direction: column;
    background-color: var(--bg-popup);
    border: var(--border-light);
    border-radius: var(--radius-container);
    color: var(--text-light);
    padding: 30px;
    text-align: center;
    z-index: 30;
}

.language-buttons {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.help-content {
    flex: 1 1 auto;
    min-height: 0;
    overflow-y: auto;
    margin: 20px 0;
    line-height: 1.6;
}

.lang-button,
.close-button {
    background-color: var(--bg-btn);
    border: var(--border-btn);
    border-radius: var(--radius-btn);
    color: var(--text-light);
    cursor: pointer;
    text-align: center;
}

.close-button:hover,
.lang-button.active {
    background-color: var(--bg-btn-hover);
}

.lang-button {
    padding: 8px 15px;
}

.close-button {
    flex: 0 0 auto;
    align-self: center;
    padding: 8px 20px;
    margin-top: 20px;
}

.help-image {
    max-width: 150px;
    height: auto;
    display: inline-block;
    vertical-align: middle;
    margin: 0 5px;
}

.help-text {
    display: none;
}

.help-text.active {
    display: block;
}

@media screen and (max-width: 600px) {
    #help-popup {
        width: 90%;
        padding: 20px;
    }

    .help-content {
        margin: 12px 0;
        font-size: 14px;
        line-height: 1.45;
    }

    .close-button {
        margin-top: 4px;
    }

    .help-image {
        max-width: 50px;
    }
}

/* ==========================================================================
   3. Overlay controls: built by buildUi() in overlay.js
   ========================================================================== */

/* Cinematic visit running: indigo accent. */
.cinematic-button.active {
    border-color: #6366f1;
    background-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 0 8px rgba(99, 102, 241, 0.6);
}

/* Same glass as #map-button so the three top controls read as one set. */
.ovg-btn,
#ovg-made-with,
#ovg-volume-pop,
#ovg-sheet {
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    color: #d4d4d8;
    font-family: 'Inter', sans-serif;
}

.ovg-btn {
    width: 44px;
    height: 44px;
    padding: 0;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.ovg-btn:hover {
    color: #fafafa;
    border-color: rgba(165, 180, 252, 0.5);
}

.ovg-btn svg {
    display: block;
}

#ovg-made-with {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 25;
    height: 44px;
    box-sizing: border-box;
    padding: 0 16px 0 12px;
    border-radius: 22px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    text-decoration: none;
    white-space: nowrap;
}

#ovg-made-with:hover {
    color: #fafafa;
}

#ovg-made-with svg {
    width: 20px;
    height: 20px;
}

#ovg-controls {
    position: fixed;
    right: 16px;
    bottom: 16px;
    z-index: 25;
    display: flex;
    gap: 8px;
}

#ovg-volume {
    position: relative;
    display: none;
}

body.has-music #ovg-volume {
    display: block;
}

#ovg-volume-btn .vol-off,
#ovg-volume-btn.off .vol-on {
    display: none;
}

#ovg-volume-btn.off .vol-off {
    display: inline;
}

/* Vertical slider: a horizontal range rotated -90deg, so the left (mute) end
   sits at the bottom. Rotation is used over writing-mode for older Safari. */
#ovg-volume-pop {
    display: none;
    position: absolute;
    bottom: 52px;
    left: 50%;
    transform: translateX(-50%);
    width: 44px;
    height: 140px;
    box-sizing: border-box;
    border-radius: 22px;
}

#ovg-volume.open #ovg-volume-pop {
    display: block;
}

#ovg-volume-range {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 110px;
    margin: 0;
    transform: translate(-50%, -50%) rotate(-90deg);
    accent-color: #818cf8;
    cursor: pointer;
}

/* Artwork sheet: bottom third, modal. Desktop keeps the old bar's footprint. */
#ovg-sheet-backdrop,
#ovg-sheet {
    display: none;
}

body.ovg-sheet-open #ovg-sheet-backdrop {
    display: block;
    position: fixed;
    inset: 0;
    z-index: 40;
    background: rgba(0, 0, 0, 0.25);
}

body.ovg-sheet-open #ovg-sheet {
    display: flex;
    flex-direction: column;
    position: fixed;
    /* Desktop: right-side panel; the artwork stays visible in the centre. */
    top: 20px;
    right: 20px;
    bottom: 20px;
    width: 440px;
    max-width: calc(100% - 40px);
    box-sizing: border-box;
    padding: 12px;
    border-radius: 15px;
    z-index: 41;
}

/* Close floats over the body's top-right so the title starts at the top. */
#ovg-sheet-close {
    position: absolute;
    top: 12px;
    right: 12px;
    z-index: 1;
    width: 40px;
    height: 40px;
    background: rgba(0, 0, 0, 0.35);
}

#ovg-sheet-close svg {
    width: 20px;
    height: 20px;
}

#ovg-sheet-body {
    flex: 1 1 auto;
    overflow-y: auto;
    padding: 14px 12px 8px;
}

#ovg-sheet-title {
    margin: 0;
    padding-right: 48px;
    font-size: 22px;
    font-weight: 600;
    line-height: 1.25;
    letter-spacing: -0.01em;
    color: #fafafa;
    overflow-wrap: anywhere;
}

#ovg-sheet-subtitle {
    margin: 6px 0 0;
    padding-right: 48px;
    font-size: 15px;
    line-height: 1.45;
    color: #a1a1aa;
}

#ovg-sheet-fields {
    margin-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.ovg-sheet-field {
    padding: 12px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.ovg-sheet-field:last-child {
    border-bottom: none;
}

.ovg-sheet-field h3 {
    margin: 0 0 4px;
    font-size: 11px;
    font-weight: 600;
    line-height: 1.3;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #71717a;
}

.ovg-sheet-field p {
    margin: 0;
    font-size: 14.5px;
    line-height: 1.6;
    color: #d4d4d8;
    font-variant-numeric: tabular-nums;
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

/* Desktop: top trio and bottom row grouped at the centre. The badge gets a fixed
   width so the map and record buttons can sit either side of it. Record button
   styles are inline (tour-recorder.js), hence !important. Its top is reset too:
   the generator preview pushes it down to clear Close Preview (top-right), which
   only matters on phones, where it still sits in that corner. */
@media screen and (min-width: 601px) {
    #ovg-made-with {
        width: 190px;
        justify-content: center;
    }

    body #map-button {
        left: auto;
        right: calc(50% + 103px);
    }

    body #tour-record-btn {
        top: 20px !important;
        left: calc(50% + 103px) !important;
        right: auto !important;
    }

    /* Raised so its middle lines up with the joystick's (120px ring at bottom 16). */
    #ovg-controls {
        right: auto;
        left: 50%;
        bottom: 54px;
        transform: translateX(-50%);
    }
}

@media screen and (max-width: 600px) {
    .ovg-btn {
        width: 38px;
        height: 38px;
    }

    /* Row + joystick (100px ring, 20px gap) centred as one group; the row is raised
       so its middle lines up with the ring's (ring bottom 12). */
    #ovg-controls {
        right: auto;
        left: 50%;
        bottom: 43px;
        transform: translateX(calc(-50% - 60px));
    }

    #ovg-made-with {
        top: 12px;
        height: 38px;
        padding: 0 6px;
    }

    /* Icon only: the words would collide with the record button. */
    #ovg-made-with span {
        display: none;
    }

    #ovg-made-with svg {
        width: 26px;
        height: 26px;
    }

    #ovg-volume-pop {
        width: 38px;
        bottom: 46px;
    }

    body.ovg-sheet-open #ovg-sheet {
        top: auto;
        right: 0;
        bottom: 0;
        width: 100%;
        max-width: none;
        height: 33vh;
        height: 33dvh;
        border-radius: 15px 15px 0 0;
        border-bottom: none;
    }
}