/* Stormwind Trebuchet Simulator - Siege Engineering Theme */

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

:root {
    --timber: #5D4037;
    --timber-light: #8D6E63;
    --iron: #37474F;
    --iron-light: #546E7A;
    --parchment: #FFF8E1;
    --parchment-dark: #D7CCC8;
    --stormwind-blue: #1565C0;
    --stormwind-gold: #FFB300;
    --trajectory: #FF7043;
    --impact: #FF5722;
    --panel-bg: rgba(30, 25, 20, 0.88);
    --panel-border: #6D4C41;
    --text-primary: #FFF8E1;
    --text-secondary: #BCAAA4;
    --text-highlight: #FFB300;
}

body {
    overflow: hidden;
    background: #1a1510;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    color: var(--text-primary);
}

#canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* HUD Panels */
.hud-panel {
    position: fixed;
    background: var(--panel-bg);
    border: 2px solid var(--panel-border);
    border-radius: 4px;
    padding: 12px 16px;
    font-size: 13px;
    min-width: 200px;
    backdrop-filter: blur(8px);
    box-shadow: 0 4px 20px rgba(0,0,0,0.5);
}

.panel-title {
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--stormwind-gold);
    margin-bottom: 10px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--panel-border);
}

.param-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 0;
    gap: 20px;
}

.param-row label {
    color: var(--text-secondary);
    font-size: 12px;
}

.param-row span {
    font-weight: 500;
    font-variant-numeric: tabular-nums;
    color: var(--text-primary);
}

.param-row.highlight {
    background: rgba(255, 179, 0, 0.1);
    margin: 4px -8px;
    padding: 4px 8px;
    border-radius: 2px;
}

.param-row.highlight span {
    color: var(--stormwind-gold);
    font-weight: 600;
}

/* Panel Positions */
.top-left {
    top: 20px;
    left: 20px;
}

.top-right {
    top: 20px;
    right: 20px;
}

.bottom-left {
    bottom: 80px;
    left: 20px;
}

.bottom-center {
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 16px 24px;
}

/* Control Buttons */
.control-btn {
    background: linear-gradient(180deg, #4a3c32 0%, #3d322a 100%);
    border: 2px solid var(--panel-border);
    color: var(--text-primary);
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    padding: 10px 28px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
    text-transform: uppercase;
}

.control-btn:hover {
    background: linear-gradient(180deg, #5a4c42 0%, #4d423a 100%);
    border-color: var(--timber-light);
}

.control-btn:active {
    transform: translateY(1px);
}

.control-btn.primary {
    background: linear-gradient(180deg, #8B0000 0%, #660000 100%);
    border-color: #a52a2a;
    font-size: 16px;
    padding: 12px 36px;
}

.control-btn.primary:hover {
    background: linear-gradient(180deg, #a00000 0%, #770000 100%);
}

.control-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.control-hints {
    display: flex;
    gap: 16px;
    font-size: 11px;
    color: var(--text-secondary);
}

.control-hints span {
    padding: 2px 6px;
    background: rgba(255,255,255,0.05);
    border-radius: 2px;
}

/* Tuning Panel */
.tuning {
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
    max-height: calc(100vh - 160px);
    overflow-y: auto;
    width: 280px;
    scrollbar-width: thin;
    scrollbar-color: var(--panel-border) transparent;
}

.tuning .panel-title {
    position: sticky;
    top: 0;
    background: var(--panel-bg);
    z-index: 1;
}

.slider-group {
    margin: 12px 0;
}

.slider-group label {
    display: block;
    font-size: 11px;
    color: var(--text-secondary);
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-group input[type="range"] {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: var(--iron);
    border-radius: 3px;
    outline: none;
}

.slider-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    background: var(--stormwind-gold);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--timber);
}

.slider-group input[type="range"]::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--stormwind-gold);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--timber);
}

.slider-value {
    display: inline-block;
    min-width: 60px;
    text-align: right;
    font-weight: 600;
    color: var(--stormwind-gold);
    margin-top: 4px;
}

.advanced-section {
    margin-top: 16px;
    border-top: 1px solid var(--panel-border);
    padding-top: 12px;
}

.advanced-section summary {
    cursor: pointer;
    font-size: 12px;
    color: var(--text-secondary);
    padding: 4px 0;
}

.advanced-section summary:hover {
    color: var(--text-primary);
}

.advanced-section .slider-group {
    margin: 8px 0;
}

/* Mobile Toggle */
.mobile-toggle {
    display: none;
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--panel-bg);
    border: 2px solid var(--panel-border);
    color: var(--text-primary);
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 13px;
    z-index: 100;
}

/* Loading Screen */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #1a1510 0%, #2d2420 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: opacity 0.5s ease;
}

#loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-title {
    font-size: 18px;
    color: var(--parchment);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.loading-bar {
    width: 300px;
    height: 4px;
    background: var(--iron);
    border-radius: 2px;
    overflow: hidden;
}

.loading-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--stormwind-gold), var(--trajectory));
    width: 0%;
    animation: loading 2s ease-in-out infinite;
}

@keyframes loading {
    0% { width: 0%; margin-left: 0%; }
    50% { width: 60%; margin-left: 20%; }
    100% { width: 0%; margin-left: 100%; }
}

/* Responsive */
@media (max-width: 1024px) {
    .tuning {
        top: auto;
        bottom: 0;
        right: 0;
        left: 0;
        transform: none;
        width: 100%;
        max-height: 50vh;
        border-radius: 16px 16px 0 0;
        transition: transform 0.3s ease;
    }
    
    .tuning.collapsed {
        transform: translateY(calc(100% - 50px));
    }
    
    .mobile-toggle {
        display: block;
    }
}

@media (max-width: 760px) {
    .hud-panel {
        min-width: 160px;
        padding: 10px 12px;
        font-size: 11px;
    }
    
    .top-left { top: 60px; left: 10px; }
    .top-right { top: 60px; right: 10px; }
    .bottom-left { bottom: 70px; left: 10px; }
    .bottom-center { padding: 10px 16px; }
    
    .control-btn { padding: 8px 20px; font-size: 12px; }
    .control-btn.primary { font-size: 14px; padding: 10px 28px; }
    .control-hints { gap: 10px; font-size: 10px; }
}

/* Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    .control-btn {
        transition: none;
    }
    
    .tuning {
        transition: none;
    }
}

/* Focus styles for accessibility */
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--stormwind-gold);
    outline-offset: 2px;
}

/* Trajectory Line */
.trajectory-line {
    position: fixed;
    pointer-events: none;
    z-index: 50;
}

/* Impact marker */
.impact-marker {
    position: fixed;
    width: 20px;
    height: 20px;
    border: 3px solid var(--impact);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
    z-index: 50;
    animation: impact-pulse 1s ease-out forwards;
}

@keyframes impact-pulse {
    0% { transform: translate(-50%, -50%) scale(0.5); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(2); opacity: 0; }
}