/* Cubeit — "Deep Sea".
   Ink Black #0D1B2A · Prussian Blue #1B263B · Dusk Blue #415A77
   Lavender Grey #778DA9 · Alabaster Grey #E0E1DD */

:root {
    --ink:       #0D1B2A;   /* page */
    --prussian:  #1B263B;   /* panels, raised surfaces */
    --dusk:      #415A77;   /* borders, dividers, fills */
    --lavender:  #778DA9;   /* accents, larger secondary text */
    --alabaster: #E0E1DD;   /* primary text */

    /* Lavender Grey reads at 4.45:1 on the panel colour — a shade under AA for
       small text — so hint-sized copy uses this slightly lifted tint (5.15:1). */
    --muted:     #8199B4;

    --bg: var(--ink);
    --surface: var(--prussian);
    --line: var(--dusk);
    --text: var(--alabaster);

    /* Outside the palette, and deliberately: these carry meaning rather than
       style — a stopped/armed timer light, and an error. */
    --amber: #E0A458;
    --green: #7FC8A9;
    --rose:  #C1666B;

    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
}

/* Renders scrollbars and form controls dark to match. */
:root { color-scheme: dark; }

* { box-sizing: border-box; }

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
    max-width: 940px;
    margin: 0 auto;
    padding: 32px 16px 64px;
    background: var(--bg);
    color: var(--text);
    line-height: 1.55;
}

::selection { background: var(--dusk); color: var(--alabaster); }

h1 { font-size: 1.75rem; font-weight: 600; margin: 0 0 4px; letter-spacing: -0.01em; }
h2 { font-size: 1.1rem; font-weight: 600; margin: 0 0 12px; }

a { color: var(--lavender); text-decoration-color: var(--dusk); }
a:hover { color: var(--alabaster); text-decoration-color: currentColor; }

header { margin-bottom: 16px; }
.meta { color: var(--muted); font-size: 0.9rem; margin: 0 0 20px; }
.meta strong { color: var(--text); font-weight: 600; }

nav {
    font-size: 0.9rem;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--line);
}
nav a { margin-right: 18px; text-decoration: none; }
nav a:hover { text-decoration: underline; }

.panel {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
}

.error {
    background: var(--surface);
    border: 1px solid var(--line);
    border-left: 3px solid var(--rose);
    border-radius: 8px;
    padding: 12px 14px;
    margin-bottom: 20px;
}

.hint { color: var(--muted); font-size: 0.88rem; }
.section-title { font-weight: 600; margin: 16px 0 6px; }

kbd {
    font-family: var(--mono);
    font-size: 0.82em;
    background: var(--ink);
    border: 1px solid var(--line);
    border-bottom-width: 2px;
    border-radius: 4px;
    padding: 1px 6px;
    color: var(--text);
}

/* --- the game ---------------------------------------------------------- */
.game-layout {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    align-items: flex-start;
}

#canvas-container {
    width: 340px;
    height: 340px;
    flex: 0 0 auto;
    border: 1px solid var(--line);
    border-radius: 10px;
    overflow: hidden;
    background: var(--ink);
    touch-action: none;
}

.controls { flex: 1; min-width: 280px; }

.clock {
    font-family: var(--mono);
    font-size: 2.75rem;
    font-variant-numeric: tabular-nums;
    line-height: 1.1;
    margin: 0 0 8px;
    color: var(--text);
}

.scramble {
    font-family: var(--mono);
    background: var(--ink);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 10px 12px;
    font-size: 0.92rem;
    word-spacing: 0.4em;
    color: var(--text);
    overflow-x: auto;
    white-space: nowrap;
}

.move-row { display: flex; gap: 6px; margin-bottom: 6px; }

button {
    font: inherit;
    padding: 7px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--ink);
    color: var(--text);
    cursor: pointer;
}
button:hover:not(:disabled) {
    border-color: var(--lavender);
    background: color-mix(in srgb, var(--dusk) 35%, var(--ink));
}
button:disabled { opacity: 0.4; cursor: default; }
button:focus-visible, input:focus-visible {
    outline: 2px solid var(--lavender);
    outline-offset: 2px;
}

.move-row button {
    min-width: 50px;
    font-family: var(--mono);
    padding: 7px 0;
    text-align: center;
}

input[type="text"] {
    font: inherit;
    padding: 8px 10px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--ink);
    color: var(--text);
}
input[type="text"]:focus { border-color: var(--lavender); outline: none; }

label { font-size: 0.88rem; color: var(--muted); }

/* --- speedmat ---------------------------------------------------------- */
/* The clock is the whole page here, so give it the room a real mat gets. */
.mat { text-align: center; padding: 40px 16px; }
.mat .clock { font-size: clamp(3rem, 14vw, 6rem); margin: 0 0 14px; }

/* The clock colour is the timer's light: amber while the hold is still
   counting, green once armed and a release will start it. */
#timer-panel[data-phase="holding"] .clock { color: var(--amber); }
#timer-panel[data-phase="ready"]   .clock { color: var(--green); }
#timer-panel[data-phase="running"] .clock { color: var(--text); }

.times {
    list-style: none;
    padding: 0;
    margin: 10px 0;
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.times li {
    font-family: var(--mono);
    font-size: 0.88rem;
    background: var(--ink);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 3px 9px;
    color: var(--text);
}
.times li.best { border-color: var(--green); color: var(--green); }

/* --- the board --------------------------------------------------------- */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 12px;
    overflow: hidden;
}
caption {
    text-align: left;
    color: var(--muted);
    font-size: 0.88rem;
    padding-bottom: 10px;
}
th, td {
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid color-mix(in srgb, var(--dusk) 45%, transparent);
}
th {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--muted);
    font-weight: 600;
    background: color-mix(in srgb, var(--dusk) 22%, transparent);
}
tbody tr:last-child td { border-bottom: none; }

.num { text-align: right; font-family: var(--mono); font-variant-numeric: tabular-nums; }
tr.me { background: color-mix(in srgb, var(--dusk) 30%, transparent); }
.you {
    color: var(--ink);
    background: var(--lavender);
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 4px;
    padding: 1px 5px;
    margin-left: 6px;
    vertical-align: middle;
}

/* --- solver ------------------------------------------------------------ */
.faces-container { display: flex; flex-wrap: wrap; gap: 10px; margin: 10px 0; }
.face {
    display: grid;
    grid-template-columns: repeat(3, 26px);
    grid-template-rows: repeat(3, 26px);
    gap: 2px;
    padding: 2px;
    border: 1px solid var(--line);
    background: var(--ink);
    border-radius: 4px;
}
/* Sticker colours are the cube's own and stay as they are; only the frame
   around them belongs to the palette. */
.cell { width: 26px; height: 26px; cursor: pointer; border-radius: 2px; }
.cell:hover { outline: 2px solid var(--alabaster); outline-offset: -2px; }

.color-palette { display: flex; gap: 8px; margin: 10px 0; }
.color-btn {
    width: 28px; height: 28px;
    border: 1px solid var(--line);
    border-radius: 50%;
    cursor: pointer;
    padding: 0;
}
/* Specific enough to beat the generic button:hover border; the swatch's own
   colour is an inline style and stays put. */
.color-btn:hover:not(:disabled) { border-color: var(--alabaster); }
.color-btn.active {
    border-color: var(--alabaster);
    box-shadow: 0 0 0 2px var(--ink), 0 0 0 4px var(--alabaster);
}

#result {
    margin-top: 16px;
    background: var(--ink);
    border: 1px solid var(--line);
    padding: 12px;
    border-radius: 8px;
    white-space: pre-wrap;
    font-family: var(--mono);
    font-size: 0.88rem;
    color: var(--text);
}
#solutionControls { margin-top: 14px; }