/* ==========================================================================
   Keyshift — styles
   ========================================================================== */

:root {
    --font-ui: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", sans-serif;
    --font-mono: "Cascadia Code", "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --radius: 16px;
    --radius-sm: 10px;
    --speed: .22s;
    --ease: cubic-bezier(.4, 0, .2, 1);
}

/* ------------------------------------------------------------------ themes */

[data-theme="aurora"] {
    --bg-0: #0d0726;
    --bg-1: #150c33;
    --surface: rgba(30, 18, 66, .72);
    --surface-2: rgba(48, 29, 96, .5);
    --border: rgba(168, 85, 247, .26);
    --border-strong: rgba(168, 85, 247, .55);
    --text: #ece9ff;
    --text-muted: #a99fd4;
    --accent: #a855f7;
    --accent-2: #22d3ee;
    --code-bg: rgba(10, 5, 26, .75);
    --b1: #a855f7;
    --b2: #22d3ee;
    --b3: #6366f1;
}

[data-theme="midnight"] {
    --bg-0: #060b18;
    --bg-1: #0b1428;
    --surface: rgba(17, 28, 51, .74);
    --surface-2: rgba(26, 43, 77, .5);
    --border: rgba(56, 189, 248, .24);
    --border-strong: rgba(56, 189, 248, .55);
    --text: #e2edff;
    --text-muted: #8fa6c9;
    --accent: #3b82f6;
    --accent-2: #38bdf8;
    --code-bg: rgba(3, 8, 20, .8);
    --b1: #3b82f6;
    --b2: #38bdf8;
    --b3: #1e40af;
}

[data-theme="terminal"] {
    --bg-0: #04120a;
    --bg-1: #061a0e;
    --surface: rgba(8, 32, 18, .78);
    --surface-2: rgba(12, 48, 27, .55);
    --border: rgba(52, 211, 153, .28);
    --border-strong: rgba(52, 211, 153, .6);
    --text: #d3ffe6;
    --text-muted: #6fae8c;
    --accent: #34d399;
    --accent-2: #a3e635;
    --code-bg: rgba(1, 8, 4, .82);
    --b1: #34d399;
    --b2: #a3e635;
    --b3: #059669;
}

[data-theme="ember"] {
    --bg-0: #1a0a05;
    --bg-1: #24100a;
    --surface: rgba(52, 24, 14, .74);
    --surface-2: rgba(78, 36, 20, .5);
    --border: rgba(251, 146, 60, .26);
    --border-strong: rgba(251, 146, 60, .58);
    --text: #ffeade;
    --text-muted: #c9a08a;
    --accent: #fb923c;
    --accent-2: #fbbf24;
    --code-bg: rgba(18, 6, 2, .8);
    --b1: #fb923c;
    --b2: #f43f5e;
    --b3: #b45309;
}

[data-theme="paper"] {
    --bg-0: #f5f3ee;
    --bg-1: #ece8df;
    --surface: rgba(255, 255, 255, .84);
    --surface-2: rgba(238, 234, 226, .8);
    --border: rgba(90, 74, 52, .22);
    --border-strong: rgba(90, 74, 52, .5);
    --text: #241d14;
    --text-muted: #6c5f4c;
    --accent: #8b5cf6;
    --accent-2: #0f766e;
    --code-bg: rgba(233, 228, 218, .9);
    --b1: #c4b5fd;
    --b2: #99f6e4;
    --b3: #fcd34d;
}

/* Status colours hold across themes so red always means blocked. */
:root {
    --ok: #34d399;
    --warn: #fbbf24;
    --bad: #fb7185;
}

[data-theme="paper"] {
    --ok: #047857;
    --warn: #b45309;
    --bad: #be123c;
}

/* ------------------------------------------------------------------- base */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-ui);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--bg-0);
    padding-bottom: 4rem;
    -webkit-font-smoothing: antialiased;
}

.app-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    overflow: hidden;
    background: radial-gradient(120% 90% at 50% -10%, var(--bg-1), var(--bg-0) 65%);
}

.blob {
    position: absolute;
    width: 46vmax;
    height: 46vmax;
    border-radius: 50%;
    filter: blur(90px);
    opacity: .3;
}

.b1 {
    background: var(--b1);
    top: -18vmax;
    left: -10vmax;
}

.b2 {
    background: var(--b2);
    bottom: -20vmax;
    right: -12vmax;
}

.b3 {
    background: var(--b3);
    top: 35%;
    left: 45%;
    opacity: .18;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 46px 46px;
    opacity: .35;
    mask-image: radial-gradient(70% 60% at 50% 0%, #000, transparent 75%);
    -webkit-mask-image: radial-gradient(70% 60% at 50% 0%, #000, transparent 75%);
}

/* ----------------------------------------------------------------- topbar */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    flex-wrap: wrap;
    max-width: 1180px;
    margin: 0 auto;
    padding: 1.1rem clamp(1rem, 3vw, 2rem);
}

.brand {
    display: flex;
    align-items: center;
    gap: .75rem;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 44px;
    height: 44px;
    border-radius: 13px;
    font-size: 1.4rem;
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
}

.brand-text strong {
    display: block;
    font-size: 1.12rem;
    letter-spacing: .01em;
}

.brand-text small {
    display: block;
    font-size: .78rem;
    color: var(--text-muted);
}

.menu {
    position: relative;
}

.menu>button {
    font: inherit;
    font-size: .92rem;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: 999px;
    padding: .5rem 1rem;
    cursor: pointer;
    transition: border-color var(--speed) var(--ease), transform var(--speed) var(--ease);
}

.menu>button:hover {
    transform: translateY(-1px);
    border-color: var(--accent);
}

.menu-list {
    position: absolute;
    right: 0;
    top: calc(100% + .45rem);
    z-index: 20;
    min-width: 168px;
    padding: .35rem;
    border-radius: var(--radius-sm);
    background: var(--bg-1);
    border: 1px solid var(--border-strong);
    box-shadow: 0 18px 40px rgba(0, 0, 0, .4);
}

.menu-list button {
    display: block;
    width: 100%;
    text-align: left;
    font: inherit;
    font-size: .9rem;
    color: var(--text);
    background: none;
    border: 0;
    border-radius: 7px;
    padding: .5rem .7rem;
    cursor: pointer;
}

.menu-list button:hover,
.menu-list button:focus-visible {
    background: var(--surface-2);
}

/* ------------------------------------------------------------------- main */

main {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 clamp(1rem, 3vw, 2rem);
    display: grid;
    gap: 1.5rem;
}

.hero {
    text-align: center;
    padding: 1.5rem 0 .5rem;
}

.hero h1 {
    margin: 0 0 .6rem;
    font-size: clamp(2.1rem, 6vw, 3.2rem);
    line-height: 1.1;
    background: linear-gradient(100deg, var(--accent), var(--accent-2));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero p {
    max-width: 62ch;
    margin: 0 auto;
    color: var(--text-muted);
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: clamp(1.1rem, 2.5vw, 1.8rem);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
}

.card h2 {
    display: flex;
    align-items: center;
    gap: .6rem;
    margin: 0 0 1.1rem;
    font-size: 1.15rem;
}

.ic {
    display: grid;
    place-items: center;
    width: 30px;
    height: 30px;
    flex: none;
    border-radius: 9px;
    font-size: .95rem;
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
}

/* ------------------------------------------------------------------ panes */

.panes {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: start;
    gap: 1rem;
}

.pane {
    display: grid;
    gap: .55rem;
}

.pane-head {
    display: grid;
    gap: .4rem;
}

.pane-head label {
    font-size: .86rem;
    font-weight: 600;
    color: var(--text-muted);
}

.pane-head select {
    font: inherit;
    font-size: .92rem;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: .5rem .6rem;
    cursor: pointer;
}

textarea {
    font-family: var(--font-mono);
    font-size: .95rem;
    line-height: 1.55;
    color: var(--text);
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    padding: .8rem .9rem;
    resize: vertical;
    min-height: 8.5rem;
    width: 100%;
    tab-size: 4;
}

textarea:focus-visible,
select:focus-visible {
    outline: 2px solid var(--accent-2);
    outline-offset: 2px;
}

.pane-note {
    margin: 0;
    font-size: .8rem;
    line-height: 1.45;
    color: var(--text-muted);
    min-height: 2.4em;
}

.swap {
    align-self: center;
    margin-top: 3.2rem;
    width: 44px;
    height: 44px;
    flex: none;
    font-size: 1.25rem;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.swap:hover {
    transform: rotate(180deg);
    border-color: var(--accent);
}

.btn {
    justify-self: start;
    font: inherit;
    font-size: .88rem;
    font-weight: 600;
    color: #fff;
    background: linear-gradient(100deg, var(--accent), var(--accent-2));
    border: 0;
    border-radius: 999px;
    padding: .5rem 1.15rem;
    cursor: pointer;
    transition: transform var(--speed) var(--ease), filter var(--speed) var(--ease);
}

.btn:hover {
    transform: translateY(-1px);
    filter: brightness(1.08);
}

.btn.ghost {
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border-strong);
}

.btn.done {
    filter: none;
    background: var(--ok);
    color: #04120a;
}

/* --------------------------------------------------------------- summary */

.summary {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    margin-top: 1.1rem;
    min-height: 1.9rem;
}

.chip-stat {
    font-size: .8rem;
    font-weight: 600;
    border-radius: 999px;
    padding: .25rem .75rem;
    border: 1px solid currentColor;
}

.chip-stat.ok {
    color: var(--ok);
}

.chip-stat.warn {
    color: var(--warn);
}

.chip-stat.bad {
    color: var(--bad);
}

.examples {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: .45rem;
    margin-top: 1rem;
}

.examples .lbl {
    font-size: .82rem;
    color: var(--text-muted);
}

.chip {
    font: inherit;
    font-size: .82rem;
    color: var(--text);
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: .3rem .8rem;
    cursor: pointer;
    transition: border-color var(--speed) var(--ease);
}

.chip:hover {
    border-color: var(--accent);
}

/* -------------------------------------------------------------- warnings */

.warnings {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: .6rem;
}

.warnings li {
    display: flex;
    gap: .8rem;
    align-items: flex-start;
    font-size: .9rem;
    line-height: 1.55;
    border-radius: var(--radius-sm);
    padding: .7rem .9rem;
    background: var(--surface-2);
    border-left: 3px solid var(--text-muted);
}

.warnings li.ok {
    border-left-color: var(--ok);
}

.warnings li.warn {
    border-left-color: var(--warn);
}

.warnings li.bad {
    border-left-color: var(--bad);
}

.w-char {
    flex: none;
    display: grid;
    place-items: center;
    min-width: 2rem;
    height: 2rem;
    padding: 0 .35rem;
    font-family: var(--font-mono);
    font-size: 1rem;
    border-radius: 8px;
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
}

.w-fix {
    display: block;
    margin-top: .25rem;
    font-size: .84rem;
    color: var(--text-muted);
}

/* ---------------------------------------------------------------- details */

.details>summary {
    display: flex;
    align-items: center;
    gap: .8rem;
    cursor: pointer;
    list-style: none;
}

.details>summary::-webkit-details-marker {
    display: none;
}

.details>summary::after {
    content: "▾";
    margin-left: auto;
    color: var(--text-muted);
    transition: transform var(--speed) var(--ease);
}

.details[open]>summary::after {
    transform: rotate(180deg);
}

.details>summary h2 {
    margin: 0;
}

.badge {
    font-size: .76rem;
    color: var(--text-muted);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: .16rem .6rem;
}

/* ----------------------------------------------------------------- recipe */

.table-wrap {
    margin-top: 1.1rem;
    max-height: 26rem;
    overflow: auto;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
}

table.recipe {
    width: 100%;
    border-collapse: collapse;
    font-size: .88rem;
}

table.recipe th,
table.recipe td {
    text-align: left;
    padding: .45rem .7rem;
    border-bottom: 1px solid var(--border);
}

table.recipe thead th {
    position: sticky;
    top: 0;
    z-index: 1;
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .05em;
    color: var(--text-muted);
    background: var(--bg-1);
}

table.recipe .n {
    width: 3.2rem;
    color: var(--text-muted);
    font-variant-numeric: tabular-nums;
}

table.recipe .glyph {
    font-family: var(--font-mono);
    font-size: 1rem;
    width: 5rem;
}

table.recipe .note {
    font-size: .8rem;
    color: var(--text-muted);
}

table.recipe tr.row-warn .glyph {
    color: var(--warn);
}

table.recipe tr.row-bad .glyph {
    color: var(--bad);
}

table.recipe tr:hover {
    background: var(--surface-2);
}

td.empty {
    text-align: center;
    color: var(--text-muted);
    padding: 1.2rem;
}

.none {
    color: var(--bad);
}

kbd {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: .82em;
    line-height: 1.4;
    padding: .1em .45em;
    border-radius: 6px;
    background: var(--code-bg);
    border: 1px solid var(--border-strong);
    border-bottom-width: 2px;
}

code {
    font-family: var(--font-mono);
    font-size: .9em;
    padding: .1em .35em;
    border-radius: 5px;
    background: var(--code-bg);
}

/* -------------------------------------------------------------- keyboards */

.kb-intro,
.kb-legend {
    font-size: .84rem;
    color: var(--text-muted);
}

.kb-intro {
    margin: 1rem 0 0;
}

.kb-block {
    margin-top: 1.1rem;
}

.kb-block h3 {
    margin: 0 0 .5rem;
    font-size: .9rem;
    font-weight: 600;
    color: var(--text-muted);
}

.keyboard {
    display: grid;
    gap: .28rem;
    overflow-x: auto;
    padding-bottom: .2rem;
}

.krow {
    display: flex;
    gap: .28rem;
    min-width: 40rem;
}

.kpad {
    flex: 0 1 0;
}

.kkey {
    position: relative;
    flex: 1 1 0;
    min-width: 2.2rem;
    aspect-ratio: 1 / .92;
    border-radius: 7px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    font-family: var(--font-mono);
    transition: background var(--speed) var(--ease), border-color var(--speed) var(--ease);
}

.kkey b {
    position: absolute;
    left: .3rem;
    bottom: .18rem;
    font-size: .82rem;
    font-weight: 700;
}

.kkey u {
    position: absolute;
    left: .3rem;
    top: .12rem;
    font-size: .66rem;
    text-decoration: none;
    color: var(--text-muted);
}

.kkey i {
    position: absolute;
    right: .28rem;
    bottom: .18rem;
    font-size: .66rem;
    font-style: normal;
    color: var(--accent-2);
}

.kkey.kspace {
    flex: 1 1 100%;
    aspect-ratio: auto;
    height: 1.9rem;
}

.kkey.kspace b {
    position: static;
    display: grid;
    place-items: center;
    height: 100%;
    font-size: .7rem;
    font-weight: 500;
    color: var(--text-muted);
}

.kkey.absent {
    opacity: .35;
    border-style: dashed;
}

.kkey.lit {
    background: color-mix(in srgb, var(--accent) 26%, transparent);
    border-color: var(--border-strong);
}

.kkey.focus {
    background: var(--accent-2);
    border-color: var(--accent-2);
    color: #04121a;
}

.kkey.focus u,
.kkey.focus i {
    color: #04121a;
}

.kb-legend {
    display: flex;
    gap: 1.1rem;
    flex-wrap: wrap;
    margin: 1rem 0 0;
}

.kb-legend u {
    text-decoration: none;
    color: var(--text-muted);
}

.kb-legend i {
    font-style: normal;
    color: var(--accent-2);
}

.kb-legend b,
.kb-legend u,
.kb-legend i {
    font-family: var(--font-mono);
    margin-right: .2rem;
}

/* ------------------------------------------------------------------- info */

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.2rem;
}

.info-grid h3 {
    margin: 0 0 .35rem;
    font-size: .95rem;
    color: var(--accent-2);
}

.info-grid p {
    margin: 0;
    font-size: .89rem;
    line-height: 1.6;
    color: var(--text-muted);
}

footer {
    max-width: 1180px;
    margin: 2.5rem auto 0;
    padding: 0 clamp(1rem, 3vw, 2rem);
    font-size: .84rem;
    color: var(--text-muted);
    text-align: center;
}

/* ------------------------------------------------------------ responsive */

@media (max-width: 860px) {
    .panes {
        grid-template-columns: 1fr;
    }

    .swap {
        justify-self: center;
        margin-top: 0;
    }
}

@media (prefers-reduced-motion: reduce) {

    *,
    *::before,
    *::after {
        transition: none !important;
        scroll-behavior: auto !important;
    }
}