:root {
    --safe-top: env(safe-area-inset-top, 0px);
    --safe-right: env(safe-area-inset-right, 0px);
    --safe-bottom: env(safe-area-inset-bottom, 0px);
    --safe-left: env(safe-area-inset-left, 0px);
    --hud-gap: 12px;
}

html, body {
    margin: 0;
    width: 100%;
    height: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #111;
    color: #eee;
    overflow: hidden;
    user-select: none;
    -webkit-user-select: none;
}

#game-container {
    width: 100vw;
    width: 100dvw;
    height: 100vh;
    height: 100dvh;
    position: relative;
    overflow: hidden;
}

#game-canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
    background: #000;
    cursor: crosshair;
    touch-action: none;
    -webkit-tap-highlight-color: transparent;
}

#ui-info {
    position: absolute;
    top: calc(var(--safe-top) + var(--hud-gap));
    left: calc(var(--safe-left) + var(--hud-gap));
    z-index: 50;
    width: min(360px, calc(100vw - var(--safe-left) - var(--safe-right) - (var(--hud-gap) * 2)));
    max-height: calc(100dvh - var(--safe-top) - var(--safe-bottom) - (var(--hud-gap) * 2));
    overflow: auto;
    background: rgba(30, 30, 30, 0.82);
    padding: 12px 16px;
    border-radius: 12px;
    text-align: left;
    box-shadow: 0 8px 24px rgba(0,0,0,0.35);
    backdrop-filter: blur(10px);
    transition: opacity 0.28s ease;
}

#ui-info > .hidden,
#ui-info > hr.hidden {
    display: none;
}

#cell-details {
    font-weight: bold;
    color: #4CAF50;
    margin-top: 5px;
}

#click-diagnostics {
    margin-top: 8px;
    text-align: left;
}

#click-diagnostics.hidden {
    display: none;
}

#copy-diagnostics {
    margin: 6px 0;
}

#diagnostics-output {
    max-width: 100%;
    max-height: 180px;
    overflow: auto;
    padding: 8px;
    background: rgba(0, 0, 0, 0.35);
    border-radius: 6px;
    white-space: pre-wrap;
    word-break: break-word;
    font-size: 12px;
    color: #ddd;
}

#missions-list {
    margin: 5px 0;
    text-align: left;
    font-size: 14px;
}

#missions-list.hidden,
#inventory-info.hidden {
    display: none;
}

#missions-list div {
    margin-bottom: 3px;
    padding-left: 15px;
    position: relative;
    color: #AAF;
}

#missions-list .mission-cost {
    font-size: 11px;
    color: #888;
    margin-left: 5px;
    font-style: italic;
}

#missions-list div::before {
    content: "•";
    position: absolute;
    left: 0;
    color: #66F;
}

#missions-list .victory-mission {
    color: #FFD700;
    font-weight: bold;
    cursor: pointer;
    text-decoration: underline;
    background: rgba(255, 215, 0, 0.1);
    padding: 5px 10px;
    border-radius: 4px;
    margin-top: 5px;
}

#inventory-info {
    margin-top: 5px;
    font-size: 14px;
    color: #FFD700;
}

#inventory-info span {
    margin: 0 5px 5px 0;
    padding: 2px 6px;
    background: rgba(0,0,0,0.3);
    border-radius: 4px;
    display: inline-block;
}

hr {
    border: 0;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin: 8px 0;
}

#zoom-controls {
    position: fixed;
    right: calc(var(--safe-right) + var(--hud-gap));
    bottom: calc(var(--safe-bottom) + var(--hud-gap));
    z-index: 60;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

#zoom-controls button {
    width: 44px;
    height: 44px;
    font-size: 24px;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    background: rgba(68, 68, 68, 0.92);
    color: white;
    cursor: pointer;
    box-shadow: 0 2px 5px rgba(0,0,0,0.4);
    transition: background 0.2s, transform 0.1s;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

#zoom-controls button:hover {
    background: rgba(102, 102, 102, 0.96);
}

#zoom-controls button:active {
    transform: scale(0.95);
    background: rgba(136, 136, 136, 0.98);
}

#save-screenshot-btn {
    position: fixed;
    left: 50%;
    bottom: calc(var(--safe-bottom) + var(--hud-gap));
    transform: translate(-50%, 16px);
    z-index: 65;
    border: none;
    border-radius: 999px;
    padding: 12px 22px;
    min-width: 172px;
    background: rgba(20, 28, 42, 0.92);
    color: #f4f7fb;
    font: 600 15px/1.1 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.35);
    backdrop-filter: blur(12px);
    cursor: pointer;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.28s ease, transform 0.28s ease, background 0.2s ease;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

#save-screenshot-btn.is-visible {
    opacity: 1;
    pointer-events: auto;
    transform: translate(-50%, 0);
}

#save-screenshot-btn:hover {
    background: rgba(32, 43, 63, 0.96);
}

#save-screenshot-btn:active {
    transform: translate(-50%, 2px);
}

#debug-menu {
    position: fixed;
    right: calc(var(--safe-right) + 56px + var(--hud-gap));
    bottom: calc(var(--safe-bottom) + 108px + var(--hud-gap));
    z-index: 70;
    background: rgba(30, 30, 30, 0.95);
    padding: 10px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 5px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

#debug-menu.hidden, #settings-menu.hidden {
    display: none;
}

#debug-menu button, #settings-menu button {
    background: #555;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-family: inherit;
    font-size: 14px;
}

#debug-menu button:hover, #settings-menu button:hover {
    background: #777;
}

#settings-menu {
    position: fixed;
    right: calc(var(--safe-right) + 56px + var(--hud-gap));
    bottom: calc(var(--safe-bottom) + 56px + var(--hud-gap));
    z-index: 70;
    background: rgba(30, 30, 30, 0.95);
    padding: 16px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.6);
    min-width: 160px;
}

.settings-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.settings-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

#settings-menu .danger-btn {
    background: #b03a2e;
    font-weight: bold;
    margin-top: 5px;
}

#settings-menu .danger-btn:hover {
    background: #ec7063;
}

#story-log {
    font-size: 14px;
    line-height: 1.4;
    color: #fff;
    margin-bottom: 0;
}

#about-link {
    color: #9fd0ff;
    text-decoration: none;
    font-size: 14px;
}

#about-link:hover {
    text-decoration: underline;
}

.story-message {
    padding: 0 0 8px 0;
    margin: 0 0 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    animation: fadeIn 0.5s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

#end-game-overlay {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 30px;
    color: white;
}

#end-game-overlay.hidden {
    display: none;
}

#tombstone {
    width: 240px;
    height: 320px;
    background: #555;
    border-radius: 120px 120px 10px 10px;
    position: relative;
    border: 8px solid #333;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 20px 50px rgba(0,0,0,0.8);
}

#engraving {
    font-family: 'Times New Roman', serif;
    font-size: 32px;
    font-weight: bold;
    color: #222;
    text-shadow: 1px 1px 1px rgba(255,255,255,0.1);
    transform: rotate(-2deg);
}

#engraving-subtitle {
    margin-top: 12px;
    font-family: 'Times New Roman', serif;
    font-size: 18px;
    color: #2f2f2f;
    text-align: center;
    display: block;
}

#end-game-story {
    max-width: min(560px, calc(100vw - 48px));
    text-align: center;
    line-height: 1.5;
    color: #ddd;
    font-size: 16px;
}

#play-again-btn {
    padding: 12px 30px;
    font-size: 20px;
    font-weight: bold;
    background: #4CAF50;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

#play-again-btn:hover {
    background: #45a049;
    transform: scale(1.05);
}

#end-game-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
}

#view-world-btn,
#play-again-btn,
#exit-world-view-btn {
    padding: 12px 30px;
    font-size: 20px;
    font-weight: bold;
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: transform 0.2s, background 0.2s;
}

#view-world-btn {
    background: #3b6fb6;
}

#view-world-btn:hover {
    background: #345f9c;
    transform: scale(1.05);
}

#exit-world-view-btn {
    position: fixed;
    left: calc(var(--safe-left) + var(--hud-gap));
    bottom: calc(var(--safe-bottom) + var(--hud-gap));
    z-index: 68;
    font-size: 15px;
    padding: 10px 18px;
    background: rgba(34, 49, 71, 0.94);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.28);
}

#exit-world-view-btn:hover {
    background: rgba(47, 67, 95, 0.98);
    transform: translateY(-1px);
}

#exit-world-view-btn.hidden {
    display: none;
}

#end-links {
    font-size: 16px;
    color: #aaa;
}

#end-links a {
    color: #4CAF50;
    text-decoration: none;
}

#end-links a:hover {
    text-decoration: underline;
}

@media (max-width: 500px), (max-height: 700px) {
    :root {
        --hud-gap: 10px;
    }

    #ui-info {
        left: calc(var(--safe-left) + var(--hud-gap));
        right: calc(var(--safe-right) + var(--hud-gap));
        width: auto;
        max-width: none;
        max-height: min(42dvh, calc(100dvh - var(--safe-top) - var(--safe-bottom) - 88px));
        padding: 10px 12px;
        font-size: 13px;
        border-radius: 10px;
    }

    #missions-list,
    #inventory-info {
        font-size: 13px;
    }

    #zoom-controls button {
        width: 42px;
        height: 42px;
        font-size: 22px;
    }

    #debug-menu {
        max-width: calc(100vw - var(--safe-left) - var(--safe-right) - (var(--hud-gap) * 2) - 52px);
    }

    #save-screenshot-btn.compact-label {
        min-width: 136px;
        padding-left: 18px;
        padding-right: 18px;
    }
}