/* ============================================================
   styles.css — Projectile Pixels Visual Design System (Premium)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&family=Orbitron:wght@700;900&display=swap');

/* ── CSS Custom Properties ─────────────────────────────── */
:root {
    --bg-deep: #050711;
    --bg-dark: #0a0e1c;
    --bg-mid: #10162a;
    --bg-card: rgba(16, 22, 42, 0.7);
    --bg-glass: rgba(18, 25, 45, 0.5);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glow: rgba(100, 180, 255, 0.4);

    --text-primary: #f0f4fa;
    --text-secondary: #9daecf;
    --text-muted: #5e6b8c;

    --accent-cyan: #00f0ff;
    --accent-pink: #ff007f;
    --accent-yellow: #ffea00;
    --accent-purple: #b026ff;
    --accent-red: #ff3366;
    --accent-green: #00e676;
    --accent-blue: #2979ff;
    --accent-orange: #ff6d00;

    --red-channel: #ff3366;
    --green-channel: #00e676;
    --blue-channel: #2979ff;

    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    --shadow-glow: 0 0 35px rgba(0, 240, 255, 0.25);
    --shadow-card: 0 12px 40px rgba(0, 0, 0, 0.6);
    --shadow-button: 0 6px 20px rgba(0, 0, 0, 0.4);

    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-med: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);

    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Orbitron', 'Inter', monospace;
}

/* ── Reset & Base ──────────────────────────────────────── */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-family: var(--font-main);
    background: var(--bg-deep);
    color: var(--text-primary);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
    -webkit-user-select: none;
}

/* Cosmic Animated Background */
body::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(176, 38, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 80% 70%, rgba(0, 240, 255, 0.15) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(255, 0, 127, 0.1) 0%, transparent 50%);
    animation: aurora 20s ease-in-out infinite alternate;
    z-index: -2;
    pointer-events: none;
}

body::after {
    content: '';
    position: absolute;
    inset: 0;
    background: url('data:image/svg+xml;utf8,<svg viewBox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"><filter id="noise"><feTurbulence type="fractalNoise" baseFrequency="0.65" numOctaves="3" stitchTiles="stitch"/></filter><rect width="100%" height="100%" filter="url(%23noise)" opacity="0.04"/></svg>');
    z-index: -1;
    pointer-events: none;
    mix-blend-mode: overlay;
}

/* ── App Container ─────────────────────────────────────── */
#app {
    width: 100%;
    height: 100vh;
    height: 100dvh;
    position: relative;
    display: flex;
    flex-direction: column;
}

/* ── Screens ───────────────────────────────────────────── */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-slow);
    z-index: 10;
}
.screen.active {
    opacity: 1;
    pointer-events: all;
}

/* ── Main Menu ─────────────────────────────────────────── */
#menu-screen {
    background: radial-gradient(ellipse at center, rgba(16, 22, 42, 0.4) 0%, var(--bg-deep) 100%);
    gap: 24px;
    padding: 40px 20px;
}

.game-title {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 8vw, 4.5rem);
    font-weight: 900;
    text-align: center;
    background: linear-gradient(135deg, var(--accent-cyan) 0%, var(--accent-pink) 50%, var(--accent-yellow) 100%);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.4));
    letter-spacing: 4px;
    animation: titlePulse 4s ease-in-out infinite, titleGradient 6s linear infinite;
    text-transform: uppercase;
}

.game-subtitle {
    font-size: clamp(0.9rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    text-align: center;
    margin-top: -16px;
    letter-spacing: 6px;
    text-transform: uppercase;
    font-weight: 600;
    text-shadow: 0 0 10px rgba(157, 174, 207, 0.3);
}

.total-score-display {
    font-family: var(--font-display);
    font-size: clamp(0.85rem, 2vw, 1.1rem);
    color: var(--accent-yellow);
    letter-spacing: 2px;
    margin-top: 8px;
    text-shadow: 0 0 15px rgba(255, 234, 0, 0.5);
    animation: breathe 3s ease-in-out infinite;
}

/* ── Path Cards ────────────────────────────────────────── */
.path-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    width: 100%;
    max-width: 900px;
    padding: 0 20px;
    margin-top: 20px;
}

.path-card {
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 32px 28px;
    cursor: pointer;
    transition: all var(--transition-med);
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-card);
    animation: floatIn 0.8s cubic-bezier(0.16, 1, 0.3, 1) backwards;
}

.path-card:nth-child(1) { animation-delay: 0.1s; }
.path-card:nth-child(2) { animation-delay: 0.2s; }
.path-card:nth-child(3) { animation-delay: 0.3s; }

.path-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% -20%, var(--card-accent, var(--accent-cyan)), transparent 60%);
    opacity: 0.1;
    transition: opacity var(--transition-med), transform var(--transition-slow);
}

.path-card::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: inherit;
    padding: 2px;
    background: linear-gradient(135deg, var(--card-accent, var(--accent-cyan)), transparent 50%, var(--card-accent, var(--accent-pink)));
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity var(--transition-med);
}

.path-card:hover, .path-card:active {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 40px rgba(0,0,0,0.5), 0 0 30px color-mix(in srgb, var(--card-accent, var(--accent-cyan)) 30%, transparent);
}

.path-card:hover::before, .path-card:active::before {
    opacity: 0.25;
    transform: scale(1.2);
}

.path-card:hover::after, .path-card:active::after {
    opacity: 1;
}

.path-card-icon {
    font-size: 2.8rem;
    margin-bottom: 16px;
    display: inline-block;
    filter: drop-shadow(0 0 15px rgba(255,255,255,0.3));
    transition: transform var(--transition-med);
}

.path-card:hover .path-card-icon {
    transform: scale(1.15) rotate(5deg);
}

.path-card-title {
    font-weight: 800;
    font-size: 1.4rem;
    margin-bottom: 8px;
    position: relative;
    color: #fff;
    letter-spacing: 1px;
}

.path-card-desc {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
    position: relative;
    font-weight: 500;
}

.path-card-progress {
    font-size: 0.85rem;
    color: var(--accent-yellow);
    margin-top: 16px;
    position: relative;
    font-weight: 700;
    letter-spacing: 1px;
}

/* ── Level Select ──────────────────────────────────────── */
#level-screen {
    background: radial-gradient(ellipse at top, rgba(0, 240, 255, 0.1) 0%, transparent 60%),
                var(--bg-deep);
    padding: 40px 20px;
    gap: 30px;
}

.level-header {
    text-align: center;
}

.level-path-name {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 5vw, 2.5rem);
    font-weight: 900;
    margin-bottom: 8px;
    text-transform: uppercase;
    background: linear-gradient(to right, #fff, var(--text-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 3px;
}

.level-back-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-secondary);
    padding: 10px 24px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 700;
    transition: all var(--transition-fast);
    margin-bottom: 16px;
    backdrop-filter: blur(10px);
    text-transform: uppercase;
    letter-spacing: 1px;
}
.level-back-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: var(--accent-cyan);
    color: #fff;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
    transform: translateY(-2px);
}

.level-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 20px;
    width: 100%;
    max-width: 800px;
    max-height: 60vh;
    overflow-y: auto;
    padding: 10px;
    perspective: 1000px;
}

.level-card {
    background: linear-gradient(145deg, rgba(30, 41, 70, 0.6), rgba(15, 20, 35, 0.8));
    backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 24px 16px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-med);
    position: relative;
    transform-style: preserve-3d;
    box-shadow: var(--shadow-card);
}

.level-card::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    box-shadow: inset 0 0 0 2px transparent;
    transition: box-shadow var(--transition-med);
}

.level-card.locked {
    opacity: 0.4;
    cursor: not-allowed;
    filter: grayscale(0.8) brightness(0.7);
    background: rgba(10, 15, 25, 0.8);
}

.level-card:not(.locked):hover {
    transform: translateY(-6px) scale(1.05);
    box-shadow: 0 15px 30px rgba(0,0,0,0.5), 0 0 25px rgba(0, 240, 255, 0.2);
    border-color: rgba(0, 240, 255, 0.5);
}
.level-card:not(.locked):hover::after {
    box-shadow: inset 0 0 0 2px rgba(0, 240, 255, 0.3);
}

.level-card-number {
    font-family: var(--font-display);
    font-size: 2.2rem;
    font-weight: 900;
    color: var(--accent-cyan);
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
    margin-bottom: 4px;
    transition: color var(--transition-fast);
}

.level-card.locked .level-card-number {
    color: var(--text-muted);
    text-shadow: none;
}

.level-card-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 8px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.level-card-stars {
    margin-top: 12px;
    font-size: 1.1rem;
    letter-spacing: 4px;
}

.level-card-score {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 600;
}

.star-filled { 
    color: var(--accent-yellow); 
    text-shadow: 0 0 10px var(--accent-yellow);
    animation: shimmer 2s infinite alternate;
}
.star-empty { color: var(--text-muted); opacity: 0.2; }

/* ── Stress Buster Config ──────────────────────────────── */
#stress-screen {
    background: radial-gradient(ellipse at center, rgba(176, 38, 255, 0.1) 0%, transparent 60%),
                var(--bg-deep);
    padding: 40px 20px;
    gap: 30px;
}

.stress-config-panel {
    background: var(--bg-glass);
    backdrop-filter: blur(24px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 40px;
    width: 100%;
    max-width: 480px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
}

.stress-config-title {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 900;
    margin-bottom: 30px;
    text-align: center;
    color: var(--accent-purple);
    text-shadow: 0 0 15px rgba(176, 38, 255, 0.4);
    letter-spacing: 2px;
    text-transform: uppercase;
}

.config-group {
    margin-bottom: 24px;
    background: rgba(0,0,0,0.2);
    padding: 16px;
    border-radius: var(--radius-md);
    border: 1px solid rgba(255,255,255,0.05);
}

.config-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.config-value {
    font-family: var(--font-display);
    font-size: 1rem;
    color: var(--accent-cyan);
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

/* ── Shared Slider Styles ──────────────────────────────── */
input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 10px;
    border-radius: 5px;
    outline: none;
    cursor: pointer;
    background: var(--bg-dark);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.6), inset 0 0 5px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.8), inset 0 0 5px rgba(0,0,0,0.2);
}

input[type="range"]::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: #fff;
    border: 3px solid var(--accent-cyan);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.6), inset 0 0 5px rgba(0,0,0,0.2);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
input[type="range"]::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.8), inset 0 0 5px rgba(0,0,0,0.2);
}

/* ── Game Screen ───────────────────────────────────────── */
#game-screen {
    z-index: 5;
    flex-direction: column;
    align-items: stretch;
    justify-content: flex-start;
    min-height: 0;
}

#game-screen.active {
    display: flex;
}

/* HUD */
.hud {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    width: 100%;
    max-width: 100%;
    min-width: 0;
    box-sizing: border-box;
    padding: 12px 24px;
    background: rgba(10, 15, 25, 0.65);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    z-index: 20;
    flex-shrink: 0;
    min-height: 54px;
}

.hud-primary, .hud-actions, .hud-details {
    display: flex;
    align-items: center;
    gap: 16px;
    min-width: 0;
}

.hud-details .hud-item {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    padding: 8px 16px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.2);
}

.hud-item {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hud-item span {
    color: #fff;
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-left: 6px;
    text-shadow: 0 0 10px rgba(255,255,255,0.3);
    transition: color 0.2s, text-shadow 0.2s;
}

/* Score Pulse */
.hud-item span.score-pulse {
    animation: scorePop 0.3s ease-out;
}

@keyframes scorePop {
    0% { transform: scale(1); color: #fff; }
    50% { transform: scale(1.3); color: var(--accent-yellow); text-shadow: 0 0 20px var(--accent-yellow); }
    100% { transform: scale(1); color: #fff; }
}

.hud-toggle-btn {
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: #fff;
    padding: 0 16px;
    height: 40px;
    border-radius: 20px;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.hud-toggle-btn:hover {
    background: rgba(0, 240, 255, 0.2);
    border-color: rgba(0, 240, 255, 0.6);
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.3);
    transform: translateY(-1px);
}

.hud-toggle-btn.active {
    background: rgba(0, 240, 255, 0.25);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.4), inset 0 0 10px rgba(0, 240, 255, 0.2);
}

.hint-toggle-icon {
    font-size: 1.1rem;
}

.hud-pause-btn {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: #fff;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.hud-pause-btn:hover {
    background: rgba(255,255,255,0.15);
    transform: rotate(90deg);
    border-color: rgba(255,255,255,0.3);
}

.hud-expand-btn {
    display: none;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    color: #fff;
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.hud-expand-btn:hover {
    background: rgba(255,255,255,0.15);
}

.hud-expand-btn svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-linecap: round;
    stroke-linejoin: round;
    stroke-width: 2.5;
    transition: transform 0.3s ease;
}

/* Canvas Area */
.canvas-container {
    flex: 1;
    position: relative;
    min-height: 0;
    overflow: hidden;
    background: #000;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    cursor: crosshair;
    touch-action: none;
}

/* ── Controls Dock ─────────────────────────────────────── */
.controls-dock {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: rgba(10, 15, 25, 0.75);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255,255,255,0.08);
    box-shadow: 0 -4px 20px rgba(0,0,0,0.4);
    flex-shrink: 0;
    z-index: 20;
}

.rgb-sliders {
    display: flex;
    flex-direction: column;
    gap: 10px;
    flex: 1;
    min-width: 0;
}

.slider-row {
    display: flex;
    align-items: center;
    gap: 12px;
}

.slider-arrow {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.05);
    color: #fff;
    font-size: 1rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
}

.slider-arrow:hover,
.slider-arrow:focus {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.3);
}

.slider-arrow:active {
    transform: scale(0.9);
}

.slider-label {
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 900;
    width: 20px;
    text-align: center;
    flex-shrink: 0;
    text-shadow: 0 0 10px currentColor;
}

.slider-label.red { color: var(--red-channel); }
.slider-label.green { color: var(--green-channel); }
.slider-label.blue { color: var(--blue-channel); }

.slider-row input[type="range"] {
    flex: 1;
    height: 8px;
    min-width: 0;
}

.slider-row.red-slider input[type="range"] {
    background: linear-gradient(90deg, #2a0000, #ff3366);
}
.slider-row.red-slider input[type="range"]::-webkit-slider-thumb {
    border-color: var(--red-channel);
    box-shadow: 0 0 15px rgba(255, 51, 102, 0.6);
}

.slider-row.green-slider input[type="range"] {
    background: linear-gradient(90deg, #002a00, #00e676);
}
.slider-row.green-slider input[type="range"]::-webkit-slider-thumb {
    border-color: var(--green-channel);
    box-shadow: 0 0 15px rgba(0, 230, 118, 0.6);
}

.slider-row.blue-slider input[type="range"] {
    background: linear-gradient(90deg, #00002a, #2979ff);
}
.slider-row.blue-slider input[type="range"]::-webkit-slider-thumb {
    border-color: var(--blue-channel);
    box-shadow: 0 0 15px rgba(41, 121, 255, 0.6);
}

.slider-value {
    font-family: var(--font-display);
    font-size: 0.8rem;
    width: 36px;
    text-align: right;
    color: var(--text-primary);
    font-weight: 700;
    flex-shrink: 0;
}

/* Color Preview + Fire Button */
.controls-right {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.color-preview {
    width: 54px;
    height: 54px;
    border-radius: var(--radius-md);
    border: 2px solid rgba(255,255,255,0.2);
    box-shadow: inset 0 0 10px rgba(0,0,0,0.5), 0 0 20px rgba(0,0,0,0.4);
    transition: background var(--transition-fast);
    position: relative;
    overflow: hidden;
}

.color-preview::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 50%;
    background: linear-gradient(to bottom, rgba(255,255,255,0.3) 0%, transparent 100%);
    pointer-events: none;
}

.fire-btn {
    width: 80px;
    height: 54px;
    border-radius: var(--radius-lg);
    border: none;
    background: linear-gradient(135deg, #ff6d00 0%, #ff3d00 100%);
    color: #fff;
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 900;
    cursor: pointer;
    letter-spacing: 2px;
    transition: all var(--transition-fast);
    box-shadow: 0 0 20px rgba(255, 109, 0, 0.4), inset 0 2px 4px rgba(255,255,255,0.3);
    text-transform: uppercase;
    animation: breathe 2s infinite alternate;
}

.fire-btn:hover {
    transform: scale(1.08);
    box-shadow: 0 0 35px rgba(255, 109, 0, 0.7), inset 0 2px 4px rgba(255,255,255,0.4);
    background: linear-gradient(135deg, #ff8f00 0%, #ff5252 100%);
}

.fire-btn:active {
    transform: scale(0.92);
    box-shadow: 0 0 10px rgba(255, 109, 0, 0.4);
}

/* ── Pause Overlay ─────────────────────────────────────── */
#pause-overlay {
    position: absolute;
    inset: 0;
    background: rgba(5, 7, 17, 0.8);
    backdrop-filter: blur(15px);
    -webkit-backdrop-filter: blur(15px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med);
}
#pause-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.pause-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 900;
    color: #fff;
    text-transform: uppercase;
    letter-spacing: 8px;
    margin-bottom: 20px;
    text-shadow: 0 0 30px rgba(0, 240, 255, 0.6);
}

/* ── Victory Overlay ───────────────────────────────────── */
#victory-overlay {
    position: absolute;
    inset: 0;
    background: rgba(5, 7, 17, 0.85);
    backdrop-filter: blur(20px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 20px;
    z-index: 50;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med);
    overflow: hidden;
}

#victory-overlay.active {
    opacity: 1;
    pointer-events: all;
}

#victory-overlay::before {
    content: '';
    position: absolute;
    inset: -50%;
    background: conic-gradient(from 0deg, transparent, rgba(255, 234, 0, 0.2), transparent);
    animation: rotateStarburst 10s linear infinite;
    z-index: -1;
}

@keyframes rotateStarburst {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.victory-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 900;
    background: linear-gradient(135deg, #ffea00, #ff6d00, #ff007f);
    background-size: 200% auto;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: titleGradient 4s linear infinite, scaleBounce 1s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-transform: uppercase;
    letter-spacing: 4px;
    filter: drop-shadow(0 0 20px rgba(255, 234, 0, 0.4));
}

@keyframes scaleBounce {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.victory-stars {
    font-size: 4rem;
    letter-spacing: 12px;
    animation: starsPopIn 0.8s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
    filter: drop-shadow(0 0 20px rgba(255, 234, 0, 0.5));
}

@keyframes starsPopIn {
    0% { transform: scale(0) rotate(-45deg); opacity: 0; }
    80% { transform: scale(1.2) rotate(10deg); }
    100% { transform: scale(1) rotate(0); opacity: 1; }
}

.victory-score {
    font-family: var(--font-display);
    font-size: 1.6rem;
    color: var(--accent-cyan);
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
    font-weight: 700;
}

.victory-breakdown {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
    font-size: 1rem;
    color: var(--text-primary);
    background: rgba(0,0,0,0.3);
    padding: 16px 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(255,255,255,0.1);
}

/* ── Shared Button Styles ──────────────────────────────── */
.btn {
    padding: 14px 40px;
    border-radius: 30px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 800;
    cursor: pointer;
    border: 1px solid var(--border-glass);
    transition: all var(--transition-med);
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%; width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.3), transparent);
    transform: skewX(-25deg);
    transition: all 0.5s ease;
}

.btn:hover::before {
    left: 150%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-cyan), #00b0ff);
    color: #000;
    border: none;
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
}
.btn-primary:hover {
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.7);
    transform: translateY(-3px) scale(1.05);
}
.btn-primary:active {
    transform: translateY(0) scale(0.95);
}

.btn-secondary {
    background: rgba(255,255,255,0.05);
    color: #fff;
    backdrop-filter: blur(10px);
}
.btn-secondary:hover {
    background: rgba(255,255,255,0.15);
    border-color: #fff;
    box-shadow: 0 0 20px rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.btn-danger {
    background: rgba(255, 51, 102, 0.15);
    color: var(--accent-red);
    border-color: rgba(255, 51, 102, 0.4);
}
.btn-danger:hover {
    background: var(--accent-red);
    color: #fff;
    box-shadow: 0 0 25px rgba(255, 51, 102, 0.5);
    transform: translateY(-2px);
}

/* ── Feedback Toast ────────────────────────────────────── */
.toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%) translateY(-30px);
    padding: 14px 32px;
    border-radius: 30px;
    font-weight: 800;
    font-size: 1rem;
    font-family: var(--font-display);
    pointer-events: none;
    opacity: 0;
    z-index: 100;
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 2px;
    backdrop-filter: blur(15px);
}

.toast.show {
    animation: slideInToast 2.5s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

@keyframes slideInToast {
    0% { opacity: 0; transform: translateX(-50%) translateY(-40px) scale(0.8); }
    15% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1.1); }
    25% { transform: translateX(-50%) translateY(0) scale(1); }
    85% { opacity: 1; transform: translateX(-50%) translateY(0) scale(1); }
    100% { opacity: 0; transform: translateX(-50%) translateY(-20px) scale(0.9); }
}

.toast.success {
    background: rgba(0, 230, 118, 0.2);
    border: 2px solid var(--accent-green);
    color: var(--accent-green);
    box-shadow: 0 0 30px rgba(0, 230, 118, 0.3);
    text-shadow: 0 0 10px rgba(0, 230, 118, 0.5);
}

.toast.miss {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255,255,255,0.3);
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 255, 255, 0.1);
    font-weight: 600;
}

/* ── Level Complete Image Preview ──────────────────────── */
.victory-image-preview {
    border: 3px solid var(--accent-cyan);
    border-radius: var(--radius-md);
    box-shadow: 0 0 30px rgba(0, 240, 255, 0.4);
    margin: 16px 0;
    image-rendering: pixelated;
    transition: transform var(--transition-med);
}
.victory-image-preview:hover {
    transform: scale(1.1) rotate(2deg);
}

/* ── Settings button in menu ───────────────────────────── */
.menu-footer {
    display: flex;
    gap: 16px;
    margin-top: 20px;
}

.menu-footer .btn {
    font-size: 0.85rem;
    padding: 10px 24px;
}

/* ── How-to-play modal ─────────────────────────────────── */
#howto-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 7, 17, 0.95);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 200;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition-med);
    padding: 20px;
}
#howto-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.howto-panel {
    background: linear-gradient(145deg, rgba(16, 22, 42, 0.9), rgba(10, 14, 28, 0.95));
    border: 1px solid rgba(0, 240, 255, 0.3);
    border-radius: var(--radius-xl);
    padding: 40px;
    max-width: 540px;
    width: 100%;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 20px 60px rgba(0,0,0,0.8), inset 0 0 30px rgba(0, 240, 255, 0.1);
}

.howto-panel h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--accent-cyan);
    margin-bottom: 24px;
    text-align: center;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
}

.howto-panel .step {
    display: flex;
    gap: 16px;
    margin-bottom: 20px;
    align-items: flex-start;
    background: rgba(255,255,255,0.03);
    padding: 16px;
    border-radius: var(--radius-md);
    transition: transform var(--transition-fast), background var(--transition-fast);
}

.howto-panel .step:hover {
    transform: translateX(5px);
    background: rgba(255,255,255,0.06);
    border-left: 3px solid var(--accent-cyan);
}

.howto-panel .step-num {
    font-family: var(--font-display);
    font-size: 1.2rem;
    color: var(--accent-yellow);
    font-weight: 900;
    flex-shrink: 0;
    width: 30px;
    text-shadow: 0 0 10px rgba(255, 234, 0, 0.5);
}

.howto-panel .step-text {
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.howto-panel .step-text strong {
    color: #fff;
    font-weight: 700;
}

/* ── Scrollbar Styling ─────────────────────────────────── */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.2);
}
::-webkit-scrollbar-thumb {
    background: rgba(255,255,255,0.2);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}

/* ── Additional Keyframes ──────────────────────────────── */
@keyframes aurora {
    0% { background-position: 0% 0%; }
    100% { background-position: 100% 100%; }
}

@keyframes titlePulse {
    0%, 100% { filter: drop-shadow(0 0 20px rgba(0, 240, 255, 0.4)); transform: scale(1); }
    50% { filter: drop-shadow(0 0 40px rgba(255, 0, 127, 0.6)); transform: scale(1.02); }
}

@keyframes titleGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes floatIn {
    0% { opacity: 0; transform: translateY(40px) scale(0.9); }
    100% { opacity: 1; transform: translateY(0) scale(1); }
}

@keyframes shimmer {
    0% { filter: brightness(1); text-shadow: 0 0 5px var(--accent-yellow); transform: scale(1); }
    100% { filter: brightness(1.3); text-shadow: 0 0 20px var(--accent-yellow); transform: scale(1.1); }
}

@keyframes breathe {
    0% { transform: scale(1); opacity: 0.8; }
    50% { transform: scale(1.05); opacity: 1; }
    100% { transform: scale(1); opacity: 0.8; }
}

/* ── Responsive ────────────────────────────────────────── */
@media (min-width: 769px) {
    .hud,
    .controls-dock {
        width: min(100%, 1200px);
        margin-inline: auto;
        border-radius: 20px 20px 0 0;
    }
    .hud {
        border-radius: 0 0 20px 20px;
        margin-top: 10px;
    }
    .controls-dock {
        margin-bottom: 10px;
    }
}

@media (max-width: 480px) {
    .path-cards {
        grid-template-columns: 1fr;
    }

    .hud {
        padding: 10px 16px;
    }

    .hud-item {
        font-size: 0.75rem;
    }
    .hud-item span {
        font-size: 0.95rem;
    }

    .controls-dock {
        padding: 12px 16px max(12px, env(safe-area-inset-bottom));
        gap: 12px;
    }

    .rgb-sliders {
        gap: 6px;
    }

    .slider-row {
        gap: 8px;
    }

    .slider-arrow {
        width: 28px;
        height: 28px;
    }

    .slider-row input[type="range"]::-webkit-slider-thumb {
        width: 20px;
        height: 20px;
    }

    .fire-btn {
        width: 64px;
        height: 48px;
    }

    .level-grid {
        grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
    }
}

@media (max-width: 768px) {
    .hud {
        display: grid;
        grid-template-columns: minmax(0, 1fr) auto;
        gap: 0 12px;
        padding: 10px 16px;
        cursor: pointer;
    }

    .hud-primary {
        grid-column: 1;
        grid-row: 2;
        min-width: 0;
        gap: 16px;
        align-self: center;
    }

    .hud-primary .hud-item {
        white-space: nowrap;
    }

    .hud-actions {
        grid-column: 2;
        grid-row: 2;
        justify-self: end;
        align-self: center;
        gap: 10px;
    }

    .hud-expand-btn {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .hud-details {
        display: grid;
        grid-column: 1 / -1;
        grid-row: 1;
        width: 100%;
        box-sizing: border-box;
        min-height: 0;
        max-height: 0;
        overflow: hidden;
        grid-template-columns: repeat(4, max-content);
        justify-content: space-between;
        align-items: center;
        column-gap: 10px;
        row-gap: 8px;
        padding-top: 0;
        padding-bottom: 0;
        opacity: 0;
        visibility: hidden;
        cursor: default;
        transition: max-height 300ms ease, padding-top 300ms ease, padding-bottom 300ms ease, opacity 180ms ease, visibility 0s linear 300ms;
    }

    .hud-details .hud-item {
        padding: 8px 12px;
        font-size: 0.75rem;
    }

    .hud.hud-details-expanded .hud-details {
        max-height: 200px;
        padding-top: 10px;
        padding-bottom: 12px;
        opacity: 1;
        visibility: visible;
        transition: max-height 300ms ease, padding-top 300ms ease, padding-bottom 300ms ease, opacity 180ms ease, visibility 0s;
        grid-template-columns: repeat(4, 1fr);
        gap: 12px;
        width: 100%;
    }

    .hud.hud-details-expanded .hud-expand-btn svg {
        transform: rotate(180deg);
    }
}

@media (max-width: 480px) {
    .hud-details {
        column-gap: 6px;
    }

    .hud-details .hud-item {
        padding: 6px 8px;
        font-size: 0.65rem;
        white-space: nowrap;
    }

    .hud-details .hud-item span {
        font-size: 0.8rem;
    }
}

@media (max-height: 600px) {
    .controls-dock {
        padding: 8px 16px max(8px, env(safe-area-inset-bottom));
    }
    .rgb-sliders {
        gap: 4px;
    }
    .slider-row {
        gap: 8px;
    }
    .slider-arrow {
        width: 26px;
        height: 26px;
    }
    .color-preview,
    .fire-btn {
        height: 42px;
    }
    .controls-right {
        gap: 8px;
    }
    .hud {
        padding: 8px 16px;
        min-height: 44px;
    }
}

@media (max-width: 768px) and (max-height: 480px) {
    .controls-dock {
        padding-top: 6px;
        padding-bottom: max(6px, env(safe-area-inset-bottom));
    }

    .rgb-sliders {
        gap: 2px;
    }

    .slider-arrow {
        width: 24px;
        height: 24px;
        font-size: 0.8rem;
    }

    .color-preview,
    .fire-btn {
        height: 38px;
    }
}

/* ── Particle burst keyframes (used by JS) ─────────────── */
@keyframes particleBurst {
    0% { transform: translate(0,0) scale(1.5); opacity: 1; filter: brightness(2); }
    100% { transform: translate(var(--px), var(--py)) scale(0); opacity: 0; filter: brightness(1); }
}

/* ── Cell fill animation ───────────────────────────────── */
@keyframes cellFill {
    0% { transform: scale(0.2); opacity: 0; filter: brightness(2); }
    50% { transform: scale(1.2); filter: brightness(1.5); }
    100% { transform: scale(1); opacity: 1; filter: brightness(1); }
}