* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: #05070a;
    font-family: 'Courier New', monospace;
}

canvas {
    display: block;
}

#hud {
    position: fixed;
    top: 20px;
    left: 20px;
    z-index: 10;
    color: #d8dcd6;
    text-shadow: 0 0 4px #000;
    user-select: none;
}

.hud-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
    font-size: 0.9rem;
    letter-spacing: 2px;
}

.hud-label {
    width: 70px;
    color: #8a948a;
}

.hud-bar {
    width: 160px;
    height: 14px;
    border: 1px solid rgba(255,255,255,0.3);
    background: rgba(0,0,0,0.4);
}

.hud-bar-fill {
    height: 100%;
    width: 100%;
    transition: width 0.2s ease;
}

.hud-bar-fill.health {
    background: linear-gradient(to right, #b81f1f, #ff2e2e);
}

.hud-bar-fill.stamina {
    background: linear-gradient(to right, #2a6e2a, #5fff6b);
}

.weapon-icons {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}

.weapon-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5px 8px;
    background: rgba(8,12,9,0.7);
    border: 1px solid rgba(120,150,110,0.4);
    border-radius: 3px;
    color: #6d786c;
    cursor: pointer;
    transition: color 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

.weapon-icon svg {
    display: block;
    height: 20px;
    width: auto;
    fill: currentColor;
}

.weapon-icon:hover {
    color: #b6c4b0;
}

.weapon-icon.active {
    color: #d8f0c0;
    background: rgba(30,45,28,0.85);
    border-color: rgba(150,190,140,0.9);
    box-shadow: 0 0 6px rgba(120,190,110,0.4);
}

#optionsBtn {
    position: fixed;
    bottom: 16px;
    left: 20px;
    z-index: 10;
    padding: 5px 14px;
    font-family: inherit;
    font-size: 0.75rem;
    letter-spacing: 2px;
    color: #d8dcd6;
    background: rgba(8,12,9,0.7);
    border: 1px solid rgba(120,150,110,0.5);
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
}

#optionsBtn:hover {
    background: rgba(30,45,28,0.85);
    border-color: rgba(150,190,140,0.8);
}

.options-panel {
    position: fixed;
    inset: 0;
    z-index: 60;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.55);
    user-select: none;
}

.options-panel.hidden {
    display: none;
}

.options-box {
    min-width: 320px;
    padding: 26px 30px;
    background: rgba(8,12,9,0.92);
    border: 1px solid rgba(120,150,110,0.45);
    box-shadow: 0 0 32px rgba(0,0,0,0.7), inset 0 0 22px rgba(0,0,0,0.5);
    color: #d8dcd6;
}

.options-title {
    font-size: 1rem;
    letter-spacing: 4px;
    color: #8a948a;
    text-align: center;
    margin-bottom: 22px;
}

.options-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 18px;
    font-size: 0.85rem;
    letter-spacing: 1px;
}

.options-row > span:first-child {
    width: 70px;
    color: #8a948a;
}

.options-row input[type="range"] {
    flex: 1;
    accent-color: #5fff6b;
    cursor: pointer;
}

.options-row input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: #5fff6b;
    cursor: pointer;
}

#volumeValue {
    width: 42px;
    text-align: right;
    color: #5fff6b;
}

#optionsClose {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 8px;
    font-family: inherit;
    font-size: 0.8rem;
    letter-spacing: 2px;
    color: #d8dcd6;
    background: rgba(30,45,28,0.7);
    border: 1px solid rgba(120,150,110,0.5);
    cursor: pointer;
    transition: background 0.15s ease;
}

#optionsClose:hover {
    background: rgba(45,68,42,0.9);
}

.checkpoint-msg {
    margin-top: 14px;
    font-size: 0.8rem;
    letter-spacing: 3px;
    color: #5fff6b;
    text-shadow: 0 0 10px rgba(95,255,107,0.7);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.checkpoint-msg.show {
    opacity: 1;
}

#instructions {
    position: fixed;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    color: #8a948a;
    font-size: 0.75rem;
    letter-spacing: 2px;
    text-shadow: 0 0 4px #000;
    user-select: none;
}

.narrative-overlay {
    position: fixed;
    inset: 0;
    z-index: 50;
    display: flex;
    align-items: flex-end;
    justify-content: center;
    background: radial-gradient(ellipse at center, rgba(0,0,0,0.1), rgba(0,0,0,0.6));
    cursor: pointer;
    transition: opacity 0.8s ease;
    user-select: none;
}

.narrative-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.narrative-box {
    max-width: 620px;
    margin-bottom: 14vh;
    padding: 28px 36px;
    background: rgba(8,12,9,0.82);
    border: 1px solid rgba(120,150,110,0.4);
    box-shadow: 0 0 32px rgba(0,0,0,0.7), inset 0 0 22px rgba(0,0,0,0.5);
    color: #d8dcd6;
    text-align: center;
}

.narrative-text {
    font-size: 1.2rem;
    line-height: 1.75;
    letter-spacing: 1px;
    font-style: italic;
    color: #e6e9e2;
    text-shadow: 0 0 8px rgba(0,0,0,0.8);
}

.narrative-hint {
    margin-top: 24px;
    font-size: 0.8rem;
    letter-spacing: 3px;
    color: #8a948a;
    animation: narrative-pulse 1.6s ease-in-out infinite;
}

@keyframes narrative-pulse {
    0%, 100% { opacity: 0.35; }
    50% { opacity: 1; }
}