body { 
    margin: 0; 
    overflow: hidden; 
    background-color: #000; 
    font-family: 'Segoe UI', sans-serif; 
    user-select: none; 
}

canvas { display: block; }
#video-input { display: none; } 

/* --- HUD LAYER --- */
#hud-layer {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    pointer-events: none;
    background: radial-gradient(circle at center, transparent 40%, rgba(0,0,0,0.8) 100%);
    z-index: 10;
}

/* --- START SCREEN --- */
#start-overlay {
    position: absolute;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(2, 8, 12, 0.98);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 999;
    pointer-events: all;
}

#start-btn {
    background: rgba(0, 255, 255, 0.05);
    color: #00ffff;
    border: 2px solid #00ffff;
    padding: 20px 60px;
    font-size: 24px;
    letter-spacing: 8px;
    text-transform: uppercase;
    cursor: pointer;
    box-shadow: 0 0 40px rgba(0, 255, 255, 0.2);
    transition: all 0.3s ease;
    font-family: 'Courier New', monospace;
    font-weight: 900;
}

#start-btn:hover { 
    background: #00ffff; 
    color: #000; 
    box-shadow: 0 0 100px #00ffff;
    transform: scale(1.05);
}

.sys-msg {
    margin-top: 20px;
    color: #008888;
    font-family: 'Courier New';
    font-size: 12px;
    letter-spacing: 2px;
    animation: blink 2s infinite;
}

@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }

/* --- SCANNER LINE (start screen effect) --- */
.scanner-line {
    position: absolute;
    top: 0; left: 0; width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(0,255,255,0.6), transparent);
    animation: scan 4s linear infinite;
    pointer-events: none;
}
@keyframes scan { 0% { top: 0; opacity: 1; } 90% { opacity: 0.5; } 100% { top: 100%; opacity: 0; } }

/* --- START SCREEN TITLE --- */
.start-title {
    font-family: 'Courier New', monospace;
    font-size: clamp(28px, 5vw, 56px);
    font-weight: 900;
    letter-spacing: 10px;
    color: #00ffff;
    text-shadow: 0 0 40px rgba(0,255,255,0.6), 0 0 80px rgba(0,255,255,0.2);
    margin-bottom: 8px;
    text-align: center;
}
.start-subtitle {
    font-family: 'Courier New', monospace;
    font-size: 11px;
    letter-spacing: 6px;
    color: #008888;
    margin-bottom: 50px;
    text-align: center;
}

/* --- HUD PANELS --- */
.hud-panel {
    position: absolute;
    color: #00ffff;
    padding: 20px;
    border: 1px solid rgba(0, 255, 255, 0.2);
    background: rgba(0, 20, 30, 0.4);
    backdrop-filter: blur(4px);
    width: 250px;
}

.top-left { 
    top: 40px; left: 40px; 
    border-left: 4px solid #00ffff;
    border-top-right-radius: 20px;
}

.bottom-right { 
    bottom: 40px; right: 40px; 
    text-align: right; 
    border-right: 4px solid #00ffff;
    border-bottom-left-radius: 20px;
}

h1 { margin: 0 0 10px 0; font-size: 20px; letter-spacing: 3px; font-weight: 300; border-bottom: 1px solid rgba(0,255,255,0.3); padding-bottom: 5px; }
.version { font-size: 10px; vertical-align: top; color: #fff; }
.row { font-size: 11px; margin-top: 5px; font-family: 'Courier New'; color: #aaddff; opacity: 0.8; }

.cmd-item { 
    font-size: 10px; font-family: 'Courier New'; color: #008888; margin-bottom: 4px; transition: color 0.2s; 
}
.cmd-active { color: #fff; text-shadow: 0 0 8px #fff; font-weight: bold; }

/* --- SUBTITLES --- */
#subtitle-box {
    position: absolute;
    bottom: 15%;
    width: 100%;
    text-align: center;
    color: #ffffff;
    font-family: 'Courier New', monospace;
    font-size: 18px;
    text-shadow: 0 2px 4px #000;
    opacity: 0.9;
    pointer-events: none;
    background: linear-gradient(90deg, transparent, rgba(0,0,0,0.5), transparent);
    padding: 10px 0;
    transition: opacity 1s ease;
}

/* --- RETICLE --- */
#reticle {
    position: absolute;
    width: 150px; height: 150px;
    border: 1px dashed rgba(0, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    display: none;
    pointer-events: none;
    transition: width 0.2s, height 0.2s;
}

#reticle-inner {
    position: absolute; top: 50%; left: 50%;
    width: 100%; height: 100%;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: #00ffff;
    border-bottom-color: #00ffff;
    animation: spin 3s linear infinite;
    box-shadow: 0 0 15px rgba(0,255,255,0.2);
}

@keyframes spin { 0% { transform: translate(-50%, -50%) rotate(0deg); } 100% { transform: translate(-50%, -50%) rotate(360deg); } }

/* Combat Mode Override */
.combat .hud-panel { border-color: #ff3333; color: #ff3333; }
.combat .top-left { border-left-color: #ff3333; }
.combat .bottom-right { border-right-color: #ff3333; }
.combat #reticle-inner { border-top-color: #ff3333; border-bottom-color: #ff3333; box-shadow: 0 0 15px rgba(255, 50, 50, 0.4); }
.combat #start-btn { color: #ff3333; border-color: #ff3333; }
/* --- LLM CONTROLS --- */
.llm-controls {
    margin-top: 12px;
    display: flex;
    flex-direction: column;
    gap: 7px;
    pointer-events: all;
}

.hud-btn {
    background: rgba(0, 255, 255, 0.04);
    color: #008888;
    border: 1px solid rgba(0, 255, 255, 0.25);
    padding: 6px 10px;
    font-family: 'Courier New', monospace;
    font-size: 10px;
    letter-spacing: 2px;
    cursor: pointer;
    text-align: left;
    transition: all 0.2s ease;
    width: 100%;
}
.hud-btn:hover {
    color: #00ffff;
    border-color: #00ffff;
    background: rgba(0, 255, 255, 0.08);
    box-shadow: 0 0 12px rgba(0,255,255,0.15);
}
.hud-btn.mode-llm {
    color: #00ffff;
    border-color: #00ffff;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.25);
    animation: pulse-llm 2s ease-in-out infinite;
}
@keyframes pulse-llm {
    0%, 100% { box-shadow: 0 0 10px rgba(0,255,255,0.2); }
    50%       { box-shadow: 0 0 25px rgba(0,255,255,0.5); }
}

.hud-select {
    background: rgba(0, 10, 15, 0.8);
    color: #aaddff;
    border: 1px solid rgba(0, 255, 255, 0.2);
    padding: 6px 8px;
    font-family: 'Courier New', monospace;
    font-size: 10px;
    letter-spacing: 1px;
    cursor: pointer;
    width: 100%;
    outline: none;
    appearance: none;
    -webkit-appearance: none;
}
.hud-select:focus {
    border-color: rgba(0, 255, 255, 0.5);
    color: #00ffff;
}
.hud-select option {
    background: #010d14;
    color: #aaddff;
    font-size: 11px;
}

/* Thinking state — subtitle pulses while LLM streams */
#subtitle-box.thinking {
    animation: think-pulse 0.8s ease-in-out infinite;
}
@keyframes think-pulse {
    0%, 100% { opacity: 0.9; }
    50%       { opacity: 0.5; }
}

/* Combat override for LLM controls */
.combat .hud-btn { border-color: rgba(255,50,50,0.3); color: #884444; }
.combat .hud-btn.mode-llm { color: #ff3333; border-color: #ff3333; }
.combat .hud-select { border-color: rgba(255,50,50,0.2); color: #cc8888; }