/* All created via chatgpt*/

/* index.css */
:root{
    --bg: #f7f3ea;
    --ink: #1f2937;
    --muted: #6b7280;

    --panel-border: rgba(31, 41, 55, 0.10);

    --accent: #2a6f97;

    --shadow: 0 18px 50px rgba(31, 41, 55, 0.18);
    --shadow-soft: 0 10px 28px rgba(31, 41, 55, 0.12);

    --radius: 18px;

    /* Sticky offset: put the canvas just under the header */
    --sticky-top: 96px; /* adjust if you change header padding/font size */
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }

body{
    margin: 0;
    color: var(--ink);
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    line-height: 1.35;

    /* watercolor paper vibe */
    background:
            radial-gradient(900px 520px at 15% 10%, rgba(97,165,194,0.18), transparent 60%),
            radial-gradient(820px 520px at 85% 30%, rgba(42,111,151,0.14), transparent 60%),
            radial-gradient(640px 480px at 50% 90%, rgba(42,111,151,0.08), transparent 60%),
            linear-gradient(180deg, rgba(255,255,255,0.65), rgba(255,255,255,0.35)),
            repeating-linear-gradient(0deg, rgba(31,41,55,0.015) 0px, rgba(31,41,55,0.015) 1px, transparent 1px, transparent 7px),
            var(--bg);

    padding: 28px;
}

/* Header */
.header{
    padding: 18px 20px;
    border-radius: calc(var(--radius) + 6px);

    background: linear-gradient(120deg, rgba(255,255,255,0.82), rgba(255,255,255,0.55));
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow-soft);

    font-weight: 800;
    letter-spacing: 0.6px;
    text-transform: uppercase;

    display: flex;
    align-items: baseline;
    justify-content: space-between;

    /* sticky header so the canvas never overlaps it */
    position: sticky;
    top: 0;
    z-index: 20;
}

/* 3-column layout wrapper (matches the HTML with .layout) */
.layout{
    margin-top: 18px;

    display: grid;
    grid-template-columns: minmax(280px, 360px) 512px minmax(260px, 340px);
    gap: 18px 22px;
    align-items: start;
}

/* Left column wrapper */
.left-col{
    display: grid;
    gap: 12px;
}

/* Instructions label */
.instructions{
    padding: 0 6px;
    color: var(--muted);
    font-weight: 700;
    letter-spacing: 0.2px;
}

/* make the middle column sticky */
.canvas-col{
    position: sticky;
    top: var(--sticky-top);   /* same variable you already have */
    z-index: 10;

    display: flex;
    justify-content: center;
    align-items: start;
}

/* canvas stays fixed-size, but NOT sticky */
.canvas{
    position: static;         /* important: remove sticky from the canvas itself */
    width: 512px;
    height: 512px;

    display: block;
    border-radius: calc(var(--radius) + 10px);
    background: radial-gradient(circle at 30% 20%, rgba(255,255,255,0.9), rgba(255,255,255,0.55));
    border: 1px solid rgba(31,41,55,0.12);
    box-shadow: var(--shadow);
    outline: 0;
}


.canvas:focus{
    box-shadow: 0 0 0 4px rgba(42,111,151,0.22), var(--shadow);
}

/* Panels (left + right) */
.controls,
.secondary-controls{
    align-self: start;

    padding: 16px 16px 14px;
    border-radius: calc(var(--radius) + 6px);

    background: linear-gradient(180deg, rgba(255,255,255,0.80), rgba(255,255,255,0.55));
    border: 1px solid var(--panel-border);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

/* Titles */
.controls::before{
    content: "Controls";
    display: block;
    font-weight: 800;
    letter-spacing: 0.4px;
    margin: 2px 2px 12px;
}

.secondary-controls::before{
    content: "Secondary Controls";
    display: block;
    font-weight: 800;
    letter-spacing: 0.4px;
    margin: 2px 2px 12px;
}

/* Control rows */
.control-row{
    display: grid;
    grid-template-columns: 22px 1fr;
    align-items: center;
    gap: 10px;

    padding: 10px 10px;
    border-radius: 12px;
    margin: 8px 0;

    background: rgba(255,255,255,0.45);
    border: 1px solid rgba(31,41,55,0.06);
}

.control-row:hover{
    border-color: rgba(42,111,151,0.22);
    box-shadow: 0 10px 18px rgba(31,41,55,0.08);
}

/* Checkbox styling */
.control-row input[type="checkbox"]{
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
    cursor: pointer;
}

.control-row label{
    cursor: pointer;
    font-weight: 650;
    color: var(--ink);
}

/* Slider row layout */
.control-row:has(input[type="range"]){
    grid-template-columns: 1fr;
    gap: 8px;
}

.control-row:has(input[type="range"]) label{
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 800;
}

.control-row input[type="range"]{
    width: 100%;
    accent-color: var(--accent);
    cursor: pointer;
}

/* Value pill (all your slider spans will look consistent) */
.control-row span{
    display: inline-block;
    min-width: 52px;
    text-align: center;

    font-weight: 800;
    color: var(--ink);
    background: rgba(42,111,151,0.10);
    border: 1px solid rgba(42,111,151,0.18);
    padding: 4px 10px;
    border-radius: 999px;
}

/* Responsive stacking */
@media (max-width: 1100px){
    :root{ --sticky-top: 12px; }

    .layout{
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        gap: 16px;
    }

    .canvas{
        position: static; /* on small screens, sticky is usually annoying */
        margin: 0 auto;
    }

    .canvas-col{
        justify-content: center;
    }
}