:root {
    --gold: #dfb15b;
    --gold-glow: #ffdf8c;
    --wood-dark: #1e130c;
    --wood-panel: rgba(43, 27, 18, 0.85);
    --ocean-deep: #0a1128;
    --blood-red: #8b0000;
    --health-green: #2e7d32;
    --text-light: #f5f5f5;
    --glass-bg: rgba(10, 17, 40, 0.7);
    --glass-border: rgba(223, 177, 91, 0.3);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
    -webkit-user-select: none;
}

body, html {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: #000;
    font-family: 'Roboto', sans-serif;
    touch-action: none;
}

#game-container {
    position: relative;
    width: 100%;
    height: 100%;
}

canvas#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    /* Subtle vignette effect overlayed via CSS or Canvas */
}

/* UI LAYERS */
.ui-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none; /* Let clicks pass through unless on specific elements */
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10;
}

.hidden {
    display: none !important;
}

/* PANELS */
.panel {
    background: var(--wood-panel);
    border: 2px solid var(--gold);
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8), inset 0 0 20px rgba(0, 0, 0, 0.9);
    padding: 30px;
    pointer-events: auto;
    text-align: center;
    color: var(--text-light);
    position: relative;
    overflow: hidden;
}

.panel::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 100%);
    pointer-events: none;
}

.modal-panel {
    min-width: 300px;
    max-width: 90%;
    backdrop-filter: blur(5px);
    animation: popIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-panel h2 {
    font-family: 'Cinzel', serif;
    color: var(--gold);
    text-shadow: 0 2px 4px rgba(0,0,0,1);
    font-size: 28px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--glass-border);
    padding-bottom: 10px;
}

@keyframes popIn {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* SPLASH SCREEN */
#splash-screen {
    background: radial-gradient(circle at center, var(--ocean-deep) 0%, #000 100%);
    pointer-events: auto;
    z-index: 100;
}

.splash-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 30px;
}

.game-icon-placeholder {
    width: 120px;
    height: 120px;
    margin: 0 auto 20px;
    filter: drop-shadow(0 0 20px rgba(223, 177, 91, 0.5));
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.game-title {
    font-family: 'Cinzel', serif;
    font-size: 48px;
    color: var(--gold);
    text-shadow: 0 4px 10px rgba(0,0,0,1), 0 0 20px var(--gold-glow);
    margin: 0;
    line-height: 1.1;
}

.game-subtitle {
    font-family: 'Cinzel', serif;
    font-size: 24px;
    color: var(--text-light);
    letter-spacing: 5px;
    text-shadow: 0 2px 5px rgba(0,0,0,0.8);
}

/* BUTTONS */
.premium-btn {
    background: linear-gradient(to bottom, #4e342e, #26140e);
    border: 2px solid var(--gold);
    color: var(--gold);
    font-family: 'Cinzel', serif;
    font-size: 20px;
    font-weight: bold;
    padding: 12px 30px;
    border-radius: 4px;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.2);
    text-shadow: 0 1px 2px rgba(0,0,0,0.8);
    transition: all 0.2s;
    pointer-events: auto;
}

.premium-btn:active {
    transform: translateY(2px);
    box-shadow: 0 1px 5px rgba(0,0,0,0.6), inset 0 2px 5px rgba(0,0,0,0.5);
}

.premium-btn:hover {
    background: linear-gradient(to bottom, #5d4037, #3e2723);
    color: var(--gold-glow);
    border-color: var(--gold-glow);
    box-shadow: 0 0 15px rgba(223, 177, 91, 0.4);
}

/* LOADING BAR */
.loading-bar-container {
    width: 300px;
    height: 10px;
    background: rgba(0,0,0,0.8);
    border: 1px solid var(--gold);
    border-radius: 5px;
    overflow: hidden;
}

.loading-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #ffb300, #ffe57f);
    box-shadow: 0 0 10px #ffb300;
    transition: width 0.2s;
}

/* HUD elements */
#hud {
    justify-content: space-between;
    align-items: flex-start;
    padding: 15px;
    z-index: 20;
}

.player-status-panel {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    padding: 10px;
    border-radius: 8px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    backdrop-filter: blur(4px);
}

.health-bar-container, .armor-bar-container {
    display: flex;
    align-items: center;
    gap: 10px;
}

.health-icon, .armor-icon {
    width: 20px;
    height: 20px;
    background-color: var(--gold);
    border-radius: 50%;
}

.bar-bg {
    width: 150px;
    height: 12px;
    background: rgba(0,0,0,0.6);
    border: 1px solid #000;
    border-radius: 6px;
    overflow: hidden;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.8);
}

.bar-fill {
    height: 100%;
    width: 100%;
    transition: width 0.3s ease-out;
}

.health-fill {
    background: linear-gradient(90deg, #1b5e20, #4caf50);
}

.armor-fill {
    background: linear-gradient(90deg, #0d47a1, #2196f3);
}

.level-score-panel {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 60" xmlns="http://www.w3.org/2000/svg"><path d="M10 30 L30 10 L170 10 L190 30 L170 50 L30 50 Z" fill="rgba(43,27,18,0.8)" stroke="%23dfb15b" stroke-width="2"/></svg>') center/contain no-repeat;
    width: 200px;
    height: 60px;
    justify-content: center;
}

.level-display {
    font-family: 'Cinzel', serif;
    color: var(--gold);
    font-size: 16px;
    font-weight: bold;
    text-shadow: 0 1px 3px black;
}

.score-display {
    font-size: 14px;
    color: white;
    text-shadow: 0 1px 2px black;
    font-weight: bold;
}

.minimap-container {
    background: rgba(0,0,0,0.5);
    border: 2px solid var(--gold);
    border-radius: 50%;
    width: 120px;
    height: 120px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
}

/* BOTTOM PANEL (Mobile Controls) */
.bottom-panel {
    position: absolute;
    bottom: 20px;
    left: 20px;
    right: 20px;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    pointer-events: none;
}

.mobile-controls-left, .mobile-controls-right {
    pointer-events: auto;
}

.joystick-base {
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(0,0,0,0.5) 100%);
    border: 2px solid rgba(223, 177, 91, 0.4);
    border-radius: 50%;
    position: relative;
    touch-action: none;
}

.joystick-knob {
    width: 50px;
    height: 50px;
    background: radial-gradient(circle, var(--gold) 0%, #8d6b2c 100%);
    border-radius: 50%;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    box-shadow: 0 4px 8px rgba(0,0,0,0.5), inset 0 2px 4px rgba(255,255,255,0.5);
    transition: transform 0.1s;
}

.action-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, #4e342e 0%, #26140e 100%);
    border: 2px solid var(--gold);
    color: var(--gold);
    font-family: 'Cinzel', serif;
    font-size: 24px;
    font-weight: bold;
    margin-left: 10px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.5);
    text-shadow: 0 2px 4px rgba(0,0,0,1);
}

.action-btn:active {
    transform: scale(0.95);
    box-shadow: 0 2px 5px rgba(0,0,0,0.5);
}

.weapon-status-panel {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--glass-bg);
    padding: 10px 20px;
    border-radius: 20px;
    border: 1px solid var(--glass-border);
}

.ship-diagram {
    width: 30px;
    height: 60px;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 30 60" xmlns="http://www.w3.org/2000/svg"><path d="M15 0 L25 15 L25 50 L15 60 L5 50 L5 15 Z" fill="none" stroke="%23dfb15b" stroke-width="2"/></svg>') center/contain no-repeat;
}

.reload-indicator {
    width: 40px;
    height: 40px;
    position: relative;
    border-radius: 50%;
    background: rgba(0,0,0,0.5);
}

.reload-ring {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(var(--gold) 0%, transparent 0%);
    position: absolute;
    top: 0; left: 0;
    mask: radial-gradient(transparent 55%, black 56%);
    -webkit-mask: radial-gradient(transparent 55%, black 56%);
}

.cannon-icon {
    width: 20px;
    height: 20px;
    background-color: #fff;
    position: absolute;
    top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    /* Replace with actual cannon svg later */
}

/* GAME OVER STATS */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 15px;
    margin: 20px 0;
}

.stat-box {
    background: rgba(0,0,0,0.4);
    padding: 10px;
    border-radius: 5px;
    border: 1px solid rgba(255,255,255,0.1);
}

.stat-box span {
    font-size: 12px;
    color: #aaa;
    display: block;
    margin-bottom: 5px;
}

.stat-box h3 {
    font-family: 'Cinzel', serif;
    color: var(--gold);
    font-size: 24px;
}

/* UPGRADE CARDS */
.upgrade-cards {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    justify-content: center;
}

.upgrade-card {
    background: linear-gradient(180deg, #3e2723 0%, #1e130c 100%);
    border: 2px solid var(--gold);
    border-radius: 8px;
    padding: 20px;
    width: 160px;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
}

.upgrade-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.7), 0 0 15px var(--gold-glow);
    border-color: var(--gold-glow);
}

.upgrade-card h3 {
    font-family: 'Cinzel', serif;
    font-size: 16px;
    color: var(--gold);
    margin: 10px 0;
}

.upgrade-card p {
    font-size: 12px;
    color: #ccc;
    line-height: 1.4;
}

.u-icon {
    width: 40px;
    height: 40px;
    margin: 0 auto;
    border-radius: 50%;
    background: #000;
}

/* INSTRUCTIONS */
.instructions-content {
    text-align: left;
    margin-bottom: 20px;
}

.inst-section {
    margin-bottom: 15px;
    padding: 10px;
    background: rgba(0,0,0,0.3);
    border-radius: 5px;
}

.inst-section h3 {
    color: var(--gold);
    margin-bottom: 5px;
    font-size: 16px;
}

.inst-section p {
    font-size: 14px;
    margin: 3px 0;
}

.inst-section.tip {
    border-left: 3px solid var(--gold);
    font-style: italic;
    color: #ddd;
}

/* RESPONSIVE */
@media (min-width: 1024px) {
    .hidden-desktop {
        display: none !important;
    }
}

@media (max-width: 768px) {
    .game-title {
        font-size: 32px;
    }
    .upgrade-cards {
        flex-direction: column;
    }
    .upgrade-card {
        width: 100%;
        display: flex;
        align-items: center;
        text-align: left;
        padding: 10px;
        gap: 15px;
    }
    .upgrade-card h3 {
        margin: 0 0 5px 0;
    }
    .u-icon {
        margin: 0;
    }
    .minimap-container {
        width: 80px;
        height: 80px;
    }
    .joystick-base {
        width: 100px;
        height: 100px;
    }
    .action-btn {
        width: 50px;
        height: 50px;
        font-size: 20px;
    }
}