@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@300;400;500&display=swap');

/* ================= VARIABLES ================= */
:root {
    /* Color Palette (Slate / Cyan / Purple) */
    --slate-950: #020617;
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-400: #94a3b8;
    --slate-200: #e2e8f0;
    
    --cyan-400: #22d3ee;
    --cyan-500: #06b6d4;
    --purple-400: #c084fc;
    --purple-500: #a855f7;
    
    --gradient-primary: linear-gradient(135deg, #22d3ee 0%, #a855f7 100%);
}

/* ================= RESET & BASE ================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--slate-900);
    color: var(--slate-200);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ================= UTILITY EMULATION (Tailwind-ish) ================= */

/* Layout */
.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }
.gap-2 { gap: 0.5rem; }
.gap-4 { gap: 1rem; }
.gap-8 { gap: 2rem; }

.grid { display: grid; }
.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }

/* Responsive Grid (md:grid-cols-2) */
@media (min-width: 768px) {
    .md\:grid-cols-2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

.w-full { width: 100%; }
.max-w-4xl { max-width: 56rem; }
.min-h-screen { min-height: 100vh; }
.h-\[300px\] { height: 300px; }

/* Spacing */
.p-6 { padding: 1.5rem; }
.p-8 { padding: 2rem; }
.px-4 { padding-left: 1rem; padding-right: 1rem; }
.py-1\.5 { padding-top: 0.375rem; padding-bottom: 0.375rem; }
.mb-4 { margin-bottom: 1rem; }
.space-y-8 > * + * { margin-top: 2rem; }
.space-y-2 > * + * { margin-top: 0.5rem; }

/* Typography */
.text-center { text-align: center; }
.text-3xl { font-size: 1.875rem; line-height: 2.25rem; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-medium { font-weight: 500; }
.font-mono { font-family: 'JetBrains Mono', monospace; }

/* Colors & Backgrounds */
.text-transparent { color: transparent; }
.bg-clip-text { -webkit-background-clip: text; background-clip: text; }
.bg-gradient-to-r { background-image: linear-gradient(to right, var(--cyan-400), var(--purple-500)); }

.bg-slate-900 { background-color: var(--slate-900); }
.bg-slate-950 { background-color: var(--slate-950); }
.bg-slate-800 { background-color: var(--slate-800); }
/* Approximating the /50 opacity classes */
.bg-slate-900\/50 { background-color: rgba(15, 23, 42, 0.5); }
.bg-slate-800\/50 { background-color: rgba(30, 41, 59, 0.5); }

.text-slate-200 { color: var(--slate-200); }
.text-slate-400 { color: var(--slate-400); }
.text-cyan-400 { color: var(--cyan-400); }
.text-cyan-300 { color: #67e8f9; }
.text-cyan-100\/70 { color: rgba(207, 250, 254, 0.7); }
.text-purple-400 { color: var(--purple-400); }
.text-purple-300 { color: #d8b4fe; }

/* Borders & Rounded */
.border { border-width: 1px; border-style: solid; }
.border-slate-800 { border-color: var(--slate-800); }
.border-slate-800\/50 { border-color: rgba(30, 41, 59, 0.5); }
.border-slate-700 { border-color: var(--slate-700); }
.border-slate-600 { border-color: #475569; }

/* Special Border Colors for Buttons */
.border-cyan-500\/50 { border-color: rgba(6, 182, 212, 0.5); }
.border-purple-500\/50 { border-color: rgba(168, 85, 247, 0.5); }

.rounded-xl { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }
.rounded { border-radius: 0.25rem; }

/* Positioning */
.relative { position: relative; }
.absolute { position: absolute; }
.block { display: block; }
.overflow-hidden { overflow: hidden; }
.top-4 { top: 1rem; }
.right-4 { right: 1rem; }

/* Effects */
.shadow-2xl { box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5); }
.transition-all { transition-property: all; transition-timing-function: cubic-bezier(0.4, 0, 0.2, 1); transition-duration: 300ms; }

/* ================= COMPONENT STYLES ================= */

/* Glow Effect */
.glow {
    filter: drop-shadow(0 0 8px currentColor);
}

/* Custom Range Slider */
.range-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: var(--slate-700);
    outline: none;
    transition: background 0.3s ease;
}

.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--slate-200);
    cursor: pointer;
    border: 2px solid var(--slate-900);
    box-shadow: 0 0 0 2px var(--cyan-500);
    transition: transform 0.1s ease, box-shadow 0.2s ease;
    margin-top: -6px; /* Center thumb */
}

/* Chrome/Safari Thumb Track Fix */
.range-slider::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: linear-gradient(to right, var(--slate-700), var(--slate-800));
    border-radius: 2px;
}

.range-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0 0 4px rgba(34, 211, 238, 0.3);
}

/* Firefox Thumb */
.range-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--slate-200);
    cursor: pointer;
    border: 2px solid var(--slate-900);
    box-shadow: 0 0 0 2px var(--cyan-500);
    transition: transform 0.1s ease;
}

/* Button Styles */
.btn {
    cursor: pointer;
    position: relative;
    overflow: hidden;
    /* Base styles handled by utility classes, but we ensure interaction here */
}

/* Button Hover States (Simulating Tailwind hover:) */
.hover\:bg-cyan-500\/20:hover { background-color: rgba(6, 182, 212, 0.2); }
.hover\:bg-purple-500\/20:hover { background-color: rgba(168, 85, 247, 0.2); }
.hover\:bg-slate-700:hover { background-color: var(--slate-700); }
.hover\:text-white:hover { color: #ffffff; }

/* Canvas Optimization */
canvas {
    image-rendering: optimizeSpeed; /* Older versions of FF */
    image-rendering: -moz-crisp-edges; /* FF 6.0+ */
    image-rendering: -webkit-optimize-contrast; /* Webkit (non-standard naming) */
    image-rendering: -o-crisp-edges; /* OS X & Windows Opera (12.02+) */
    image-rendering: pixelated; /* Awesome future-browsers */
    -ms-interpolation-mode: nearest-neighbor; /* IE */
}

/* Prevent iOS from zooming in on inputs when tapped */
@media screen and (max-width: 768px) {
    input[type="range"], 
    input[type="number"], 
    select {
        font-size: 16px !important; 
    }
}

/* Force Hardware Acceleration for the Canvas */
canvas {
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
    touch-action: none; /* Prevents scrolling the page when adjusting sliders */
    user-select: none;
    -webkit-user-select: none;
}

/* Fix for iOS Range Sliders being invisible or weirdly styled */
input[type=range] {
    -webkit-appearance: none;
    background: transparent;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: #1e293b;
    border-radius: 3px;
    border: 1px solid #334155;
}

input[type=range]::-webkit-slider-thumb {
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: #22d3ee;
    cursor: pointer;
    -webkit-appearance: none;
    margin-top: -8px; /* Centers thumb on iOS Safari */
    box-shadow: 0 0 10px rgba(6, 182, 212, 0.5);
}