/* Fluid typography and scaling */
:root {
    --bg: #E7E5E4;
    --fg: #1c1917;
    --accent: #682bd7;
    --gold: #fbbf24;
    --danger: #dc2626;
    --success: #16a34a;
}
@media (prefers-color-scheme: dark) {
    :root { 
        --bg: #181A1B;
        --fg: #D6D3D1;
        --accent: #8b5cf6;
        --gold: #fbbf24;
        --danger: #ef4444;
        --success: #22c55e;
    }
}

@font-face {
    font-family: 'Space Mono';
    src: local('Space Mono'), local('SpaceMono'), monospace;
}

body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--fg);
    font-family: 'Space Mono', 'Roboto Mono', monospace;
    overflow: hidden;
    touch-action: none;
    user-select: none;
    -webkit-user-select: none;
}

#game-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

canvas {
    background: rgba(15, 17, 21, 0.02);
    box-shadow: 0 0 40px rgba(0,0,0,0.1); 
}

/* UI Overlay Layer */
.ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: clamp(20px, 3vw, 40px);
    box-sizing: border-box;
    z-index: 10;
}

.hud-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    /* Responsive font size */
    font-size: clamp(14px, 1.2vw, 24px); 
    font-weight: bold;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
    width: 100%;
}

.hud-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    font-size: clamp(12px, 1vw, 20px);
    opacity: 0.6;
}


/* Stats & Bars */
.health-bar {
    display: flex;
    gap: clamp(4px, 0.5vw, 8px);
}
.hp-segment {
    width: clamp(20px, 2vw, 40px); 
    height: clamp(6px, 0.6vw, 12px); 
    background: var(--fg);
    opacity: 0.3;
}
.hp-segment.active {
    background: var(--accent);
    opacity: 1;
    box-shadow: 0 0 8px var(--accent);
}
.hp-segment-extra {
    width: clamp(20px, 2vw, 40px); 
    height: clamp(6px, 0.6vw, 12px);
    background: var(--gold);
    opacity: 0.8;
    box-shadow: 0 0 8px var(--gold);
}
.hp-segment-extra.hidden {
    display: none;
}

.btn-exit {
    pointer-events: auto;
    text-decoration: none;
    color: var(--fg);
    border: 1px solid var(--fg); 
    padding: clamp(8px, 1vw, 16px) clamp(12px, 1.5vw, 24px); 
    font-size: clamp(10px, 0.9vw, 18px);
    opacity: 0.5;
    transition: opacity 0.2s;
}
.btn-exit:hover {
    opacity: 1;
    background: var(--fg);
    color: var(--bg);
}

/* Boss Health Bar */
#boss-hud {
    position: absolute; 
    top: clamp(60px, 8vh, 120px); 
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    max-width: 600px;
    opacity: 0;
    transition: opacity 0.5s;
    z-index: 5;
}
#boss-hud.visible { opacity: 1; }
.boss-bar-frame {
    width: 100%;
    height: clamp(6px, 0.8vh, 12px); 
    border: 1px solid var(--danger);
    padding: 1px;
    background: rgba(0,0,0,0.2);
}
.boss-bar-fill {
    width: 100%;
    height: 100%;
    background: var(--danger);
    transition: width 0.2s;
}
.boss-label {
    text-align: center; 
    font-size: clamp(10px, 0.8vw, 16px); 
    color: var(--danger);
    margin-bottom: 4px;
    letter-spacing: 2px;
}

/* Screens */
.screen {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.85);
    backdrop-filter: blur(4px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    pointer-events: auto;
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 20;
}
.screen.visible { opacity: 1; }
.screen.hidden { pointer-events: none; opacity: 0; }

h1 { 
    font-size: clamp(42px, 5vw, 80px); 
    margin: 0 0 10px 0;
    letter-spacing: -2px; 
    text-transform: uppercase;
    color: var(--accent); 
    text-shadow: 0 0 20px var(--accent); 
}
h2 { 
    font-size: clamp(24px, 3vw, 48px); 
    margin: 0 0 20px 0;
    opacity: 0.8;
    font-weight: normal; 
}
p { 
    font-size: clamp(13px, 1.2vw, 22px); 
    max-width: 600px;
    text-align: center; 
    line-height: 1.6;
    opacity: 0.7;
    margin-bottom: 30px; 
}

button {
    background: transparent;
    border: 1px solid var(--fg);
    color: var(--fg);
    padding: 12px 32px;
    font-family: inherit; 
    font-size: clamp(14px, 1.5vw, 24px);
    text-transform: uppercase;
    letter-spacing: 2px;
    cursor: pointer;
    transition: all 0.2s;
}
button:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 0 20px var(--accent);
}

.high-score-label {
    margin-top: 20px;
    font-size: clamp(11px, 1vw, 18px);
    opacity: 0.5;
    letter-spacing: 1px;
}

.scanlines {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: linear-gradient(to bottom, rgba(255,255,255,0), rgba(255,255,255,0) 50%, rgba(0,0,0,0.05) 50%, rgba(0,0,0,0.05));
    background-size: 100% 4px;
    pointer-events: none;
    z-index: 15;
    opacity: 0.6;
}

.camp-warning {
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    color: var(--danger);
    border: 1px solid var(--danger);
    padding: 5px 10px;
    font-size: clamp(10px, 1vw, 16px);
    animation: blink 0.5s infinite;
    pointer-events: none;
    display: none;
    z-index: 8;
}

@keyframes blink {
    0% { opacity: 1; }
    50% { opacity: 0; }
    100% { opacity: 1; }
}
/* Rockets */
.rocket-icon {
    width: 14px;
    height: 24px;
    opacity: 0.2;
    color: var(--fg);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}
.rocket-icon.active {
    opacity: 1;
    color: var(--gold);
    filter: drop-shadow(0 0 4px var(--gold));
    transform: translateY(-2px);
}

/* Mobile rocket fire button — hidden on desktop */
.mobile-rocket-btn {
    display: none;
    position: absolute;
    bottom: clamp(20px, 3vw, 40px);
    right: clamp(20px, 3vw, 40px);
    width: 64px;
    height: 64px;
    border-radius: 50%;
    border: 2px solid var(--gold);
    background: rgba(0,0,0,0.4);
    color: var(--gold);
    pointer-events: auto;
    z-index: 12;
    justify-content: center;
    align-items: center;
    padding: 0;
    letter-spacing: 0;
}
.mobile-rocket-btn:hover {
    background: var(--gold);
    color: #fff;
    box-shadow: 0 0 20px var(--gold);
}
@media (pointer: coarse) {
    .mobile-rocket-btn { display: flex; }
}