/* Copyright (c) 2025. Jericho Crosby (Chalwk) */

:root{
    --bg:#0f1724;
    --card: rgba(255,255,255,0.04);
    --glass: rgba(255,255,255,0.03);
    --accent: #7ee3b4;
    --muted: rgba(255,255,255,0.65);
    --glass-border: rgba(255,255,255,0.06);
    --radius: 14px;
    --shadow: 0 8px 30px rgba(2,6,23,0.6);
    --glass-blur: 10px;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
}

* { box-sizing: border-box; }
html,body,#app{ height:100%; }
body{
    margin:0;
    background: radial-gradient(1200px 800px at 10% 10%, rgba(126,227,180,0.06), transparent 6%),
    radial-gradient(900px 600px at 90% 90%, rgba(121,114,255,0.04), transparent 6%),
    var(--bg);
    color: #e6eef6;
    -webkit-font-smoothing:antialiased;
    -moz-osx-font-smoothing:grayscale;
    padding:20px;
    min-height:100vh;
    display:flex;
    align-items:center;
    justify-content:center;
}

.app{
    width:100%;
    max-width:1160px;
    margin:auto;
}

.app-header{
    display:flex;
    align-items:flex-start;
    justify-content:space-between;
    gap:18px;
    margin-bottom:18px;
}
.app-header h1{
    margin:0;
    font-size:20px;
    letter-spacing:-0.02em;
}
.subtitle{
    margin:4px 0 0 0;
    color:var(--muted);
    font-size:13px;
}

.layout{
    display:grid;
    grid-template-columns: 1fr 360px;
    gap:18px;
    align-items:start;
}

/* Cards */
.card{
    background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
    border-radius:var(--radius);
    padding:16px;
    border: 1px solid var(--glass-border);
    box-shadow: var(--shadow);
}

/* Left column */
.left .wheel-card{
    display:flex;
    flex-direction:column;
    gap:14px;
}
.wheel-top{
    display:flex;
    align-items:center;
    justify-content:space-between;
}
.preview{
    display:flex;
    align-items:center;
    gap:12px;
}
.swatch{
    width:64px;
    height:64px;
    border-radius:10px;
    box-shadow: 0 6px 20px rgba(2,8,20,0.6), inset 0 1px 0 rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.06);
    flex:0 0 64px;
}
.swatch-info{ display:flex; flex-direction:column; gap:4px; }
.hex{ font-weight:600; font-size:15px; }
.small-info{ color:var(--muted); font-size:13px; }

.modes{ display:flex; gap:6px; align-items:center; }
.mode-btn{
    background:transparent;
    border-radius:10px;
    padding:6px 9px;
    border: 1px solid transparent;
    color:var(--muted);
    font-size:13px;
    cursor:pointer;
}
.mode-btn input{ display:none; }
.mode-btn input:checked + * {}

.mode-btn.active {
    border: 1px solid var(--accent);
    color: var(--accent);
    background: rgba(126, 227, 180, 0.1);
}

.wheel-area{
    display:flex;
    gap:16px;
    align-items:flex-start;
}
.canvas-wrap{
    position:relative;
    width:360px;
    height:360px;
    flex:0 0 360px;
    display:flex;
    align-items:center;
    justify-content:center;
    overflow: hidden;
    border-radius: 50%;
}
canvas{
    width:100%;
    height:100%;
    border-radius:50%;
    box-shadow: 0 10px 30px rgba(2,8,20,0.6);
    cursor:crosshair;
    display:block;
    position: absolute;
    top: 0;
    left: 0;
}

.picker{
    position:absolute;
    width:18px;
    height:18px;
    border-radius:50%;
    border:2px solid #fff;
    transform:translate(-50%,-50%);
    box-shadow:0 4px 12px rgba(0,0,0,0.6);
    pointer-events:none;
    background:rgba(255,255,255,0.05);
}

.controls{
    flex:1;
    display:flex;
    flex-direction:column;
    gap:12px;
    min-width:220px;
}

#sliders{ display:flex; flex-direction:column; gap:10px; }

.slider-row{
    display:flex;
    align-items:center;
    gap:10px;
}
.slider-row label{ width:46px; font-size:13px; color:var(--muted); }
.range{
    flex:1;
    display:flex;
    align-items:center;
    gap:8px;
}
.range input[type=range]{ width:100%; -webkit-appearance:none; appearance:none; height:6px; border-radius:999px; background:linear-gradient(90deg, rgba(255,255,255,0.06), rgba(255,255,255,0.03)); }
.range input[type=range]::-webkit-slider-thumb{ -webkit-appearance:none; width:18px; height:18px; border-radius:50%; background:white; box-shadow:0 2px 8px rgba(0,0,0,0.4); border:3px solid rgba(0,0,0,0.15); }

.inputs{ display:flex; gap:8px; align-items:center; }
.inputs label{ flex:1; display:flex; flex-direction:column; gap:6px; font-size:13px; color:var(--muted); }
.inputs input{ padding:8px 10px; border-radius:10px; border:1px solid rgba(255,255,255,0.04); background:transparent; color:inherit; }

.btn{
    background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
    border:1px solid rgba(255,255,255,0.06);
    padding:8px 12px;
    border-radius:10px;
    color:inherit;
    cursor:pointer;
    font-weight:600;
}
.btn.ghost{
    background:transparent;
    border:1px dashed rgba(255,255,255,0.04);
}

.palette-card h2{ margin-top:0; margin-bottom:10px; }
.swatch-grid{ display:grid; grid-template-columns: repeat(6, 1fr); gap:8px; margin-bottom:12px; }
.swatch-grid .sw{
    width:100%;
    padding-top:100%;
    border-radius:8px;
    position:relative;
    overflow:hidden;
    cursor:pointer;
    border:1px solid rgba(255,255,255,0.04);
    transition:transform .18s ease;
}
.swatch-grid .sw:hover{ transform:translateY(-4px); }

.swatch-grid .sw::after{
    content:"";
    position:absolute; inset:0;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.03);
}

.tips-card ul{ margin:0; padding-left:18px; color:var(--muted); }
.tips-card li{ margin-bottom:6px; font-size:14px; }

.footer{ margin-top:20px; text-align:center; color:var(--muted); font-size:12px; }

@media (max-width:980px){
    .layout{ grid-template-columns: 1fr; }
    .canvas-wrap{ width:300px; height:300px; flex:0 0 300px; }
    .canvas-wrap canvas{ border-radius:12px; }
    .right{ order:2; }
    .left{ order:1; }
}

@media (max-width:480px){
    body{ padding:12px; }
    .canvas-wrap{ width:260px; height:260px; flex:0 0 260px; }
    .swatch{ width:54px; height:54px; }
    .mode-btn{ padding:6px 8px; font-size:12px; }
    .swatch-grid{ grid-template-columns: repeat(5,1fr); }
}