/*
 * style.css - MochiiTracer · Protogen OS firmware installer.
 * Part of MochiiTracer, a fork of ProtoTracer by coelacant1. GNU AGPL-3.0.
 */

:root {
    --paper: #eef1f4;
    --surface: #ffffff;
    --ink: #16202b;
    --muted: #586474;
    --line: #cfd6de;
    --accent: #00727e;
    --accent-ink: #ffffff;
    --accent-soft: #d3ecef;
    --shell: #dfe4ea;
    --shell-edge: #c3cbd4;
    --visor: #05080c;
    --ok: #1b7a48;
    --warn: #865700;
    --warn-bg: #fbefd3;
    --err: #b3263a;
    --err-bg: #fbe4e7;
    --log-bg: #0a0f14;
    --log-ink: #c4ecef;

    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans", "Helvetica Neue", Arial,
            "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;
    --mono: ui-monospace, "Cascadia Mono", "SF Mono", Menlo, Consolas, "Liberation Mono", "Noto Sans Mono CJK SC", monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --paper: #0f1318;
        --surface: #161c23;
        --ink: #e5eaf0;
        --muted: #9ba7b4;
        --line: #2c3540;
        --accent: #46d2db;
        --accent-ink: #04262a;
        --accent-soft: #133a41;
        --shell: #28313b;
        --shell-edge: #1a2028;
        --ok: #62d394;
        --warn: #f1b84f;
        --warn-bg: #2b2414;
        --err: #ff7d8c;
        --err-bg: #301a1e;
        --log-bg: #070a0e;
    }
}

*, *::before, *::after { box-sizing: border-box; }
[hidden] { display: none !important; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font: 16px/1.55 var(--font);
    overflow-wrap: break-word;
}

:lang(zh) body, body:lang(zh) { line-height: 1.7; }

a { color: var(--accent); text-underline-offset: 0.18em; }

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* ===== Top bar ===== */
.bar {
    max-width: 46rem;
    margin: 0 auto;
    padding: 14px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.brand {
    color: var(--ink);
    font-weight: 650;
    text-decoration: none;
}

.langs {
    display: inline-flex;
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 2px;
    background: var(--surface);
}

.langs button {
    font: inherit;
    font-size: 0.875rem;
    border: 0;
    border-radius: 999px;
    padding: 4px 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
}

.langs button[aria-pressed="true"] {
    background: var(--ink);
    color: var(--paper);
}

/* ===== Hero: the visor ===== */
main {
    max-width: 46rem;
    margin: 0 auto;
    padding: 0 16px 48px;
}

.hero { padding-top: 8px; }

.shell {
    padding: clamp(7px, 1.8vw, 13px);
    border-radius: clamp(22px, 7vw, 58px);
    background: linear-gradient(180deg, var(--shell), var(--shell-edge));
}

#visor {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 136.2 / 36.4;
    border-radius: clamp(16px, 5.6vw, 46px);
    background:
        radial-gradient(120% 150% at 50% -10%, #17212c 0%, var(--visor) 62%);
    box-shadow: inset 0 3px 14px rgba(0, 0, 0, 0.65);
}

h1 {
    margin: 1.6rem 0 0.5rem;
    font-size: clamp(1.9rem, 1.25rem + 2.6vw, 2.75rem);
    line-height: 1.12;
    font-weight: 760;
    letter-spacing: -0.015em;
    text-wrap: balance;
}

.lead {
    margin: 0;
    max-width: 36em;
    font-size: 1.125rem;
    color: var(--muted);
}

/* ===== Facts ===== */
.facts {
    margin: 2rem 0 0;
    padding-top: 1.1rem;
    border-top: 1px solid var(--line);
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.6rem 2rem;
}

.fact h2 {
    margin: 0 0 0.2rem;
    font-size: 1rem;
    font-weight: 650;
}

.fact p {
    margin: 0;
    font-size: 0.9375rem;
    color: var(--muted);
}

.fact.linux {
    grid-column: 1 / -1;
    margin-top: 0.6rem;
    padding-top: 0.9rem;
    border-top: 1px solid var(--line);
}

details > summary {
    cursor: pointer;
    list-style-position: inside;
}

details > summary h2 { display: inline; }

.fact.linux > p { margin-top: 0.4rem; }

.note {
    font-size: 0.875rem;
    color: var(--muted);
}

.rules { margin-top: 0.4rem; }
.rules > summary { font-size: 0.9375rem; color: var(--muted); }

.code {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin: 0.6rem 0;
    padding: 8px 8px 8px 0;
    border-radius: 10px;
    background: var(--log-bg);
    color: var(--log-ink);
}

.code pre {
    flex: 1;
    min-width: 0;
    margin: 0;
    padding: 4px 0 4px 14px;
    overflow-x: auto;
    font: 0.8125rem/1.6 var(--mono);
    white-space: pre;
}

.copy {
    flex: none;
    font: inherit;
    font-size: 0.8125rem;
    padding: 3px 10px;
    border-radius: 6px;
    border: 1px solid rgba(196, 236, 239, 0.35);
    background: transparent;
    color: var(--log-ink);
    cursor: pointer;
}

/* ===== Steps ===== */
.steps {
    list-style: none;
    margin: 2.5rem 0 0;
    padding: 0;
}

.step {
    position: relative;
    display: grid;
    grid-template-columns: 2.5rem minmax(0, 1fr);
    gap: 0 1rem;
    padding-bottom: 2rem;
}

.step::before {
    content: "";
    position: absolute;
    left: calc(1.25rem - 1px);
    top: 2.75rem;
    bottom: 0.25rem;
    width: 2px;
    background: var(--line);
}

.step:last-child::before { display: none; }

.num {
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    border: 2px solid var(--line);
    display: grid;
    place-items: center;
    font-weight: 700;
    color: var(--muted);
    background: var(--paper);
}

.step[data-state="active"] .num {
    border-color: var(--accent);
    color: var(--accent);
}

.step[data-state="done"] .num {
    border-color: var(--accent);
    background: var(--accent);
    color: var(--accent-ink);
}

.step[data-state="done"] .num span { display: none; }
.step[data-state="done"] .num::after { content: "✓"; }

.body h2 {
    margin: 0.35rem 0 0.5rem;
    font-size: 1.25rem;
    line-height: 1.3;
    font-weight: 680;
}

.body > p { margin: 0 0 0.9rem; max-width: 38em; }

.help {
    margin: 0.5rem 0 0;
    font-size: 0.9375rem;
    color: var(--muted);
}

.panel { margin-top: 1rem; }

.row {
    display: flex;
    flex-wrap: wrap;
    align-items: flex-start;   /* labels line up on top even if the controls differ in height */
    gap: 0.75rem 1.25rem;
}

.row.tight {
    align-items: center;
    gap: 0.5rem;
}

.field {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    margin: 0;
    padding: 0;
    border: 0;
    min-width: 0;
}

.label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--muted);
    padding: 0;
}

/* a fieldset's legend sits outside its flex box, so it doesn't get the gap: give it by hand */
legend.label { margin-bottom: 0.3rem; }

select, input[type="number"], .cmd input {
    font: inherit;
    color: var(--ink);
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px 10px;
}

select { min-width: 12rem; max-width: 100%; }

/* segmented radio group */
.seg {
    display: inline-flex;
    flex-wrap: wrap;
    border: 1px solid var(--line);
    border-radius: 9px;
    background: var(--surface);
    overflow: hidden;
}

.seg label {
    position: relative;
    padding: 7px 14px;
    cursor: pointer;
    color: var(--muted);
}

.seg label + label { border-left: 1px solid var(--line); }

.seg input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.seg label:has(input:checked) {
    background: var(--accent-soft);
    color: var(--ink);
    font-weight: 600;
}

.seg label:has(input:focus-visible) {
    outline: 3px solid var(--accent);
    outline-offset: -3px;
}

/* buttons */
.btn {
    font: inherit;
    font-weight: 600;
    padding: 9px 16px;
    border-radius: 9px;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
}

.btn:hover:not(:disabled) { border-color: var(--accent); }

.btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: var(--accent-ink);
}

.btn.primary:hover:not(:disabled) { filter: brightness(1.08); }

button:disabled,
input:disabled,
select:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

progress {
    display: block;
    width: 100%;
    max-width: 30rem;
    height: 10px;
    margin-top: 0.9rem;
    accent-color: var(--accent);
}

.drop {
    display: block;
    position: relative;
    padding: 1.6rem 1rem;
    border: 2px dashed var(--line);
    border-radius: 12px;
    text-align: center;
    color: var(--muted);
    background: var(--surface);
    cursor: pointer;
}

.drop.over,
.drop:hover { border-color: var(--accent); color: var(--ink); }
.drop:focus-within { outline: 3px solid var(--accent); outline-offset: 2px; }

.drop input {
    position: absolute;
    inset: 0;
    opacity: 0;
    cursor: pointer;
    width: 100%;
}

/* messages */
.msg {
    margin: 0.8rem 0 0;
    padding: 0.55rem 0.8rem;
    border-left: 3px solid var(--line);
    border-radius: 0 8px 8px 0;
    background: var(--surface);
    font-size: 0.9375rem;
    max-width: 38em;
}

.msg[data-kind="ok"] { border-left-color: var(--ok); }
.msg[data-kind="warn"] { border-left-color: var(--warn); background: var(--warn-bg); }
.msg[data-kind="error"] { border-left-color: var(--err); background: var(--err-bg); }
.msg a { font-weight: 600; }

.banner { margin-top: 1.2rem; }

.planb {
    margin-top: 1rem;
    max-width: 38em;
}

.planb > summary { font-weight: 600; }
.planb > p { margin: 0.4rem 0 0; color: var(--muted); }

/* ===== Console ===== */
.console {
    margin-top: 0.5rem;
    padding-top: 1.2rem;
    border-top: 1px solid var(--line);
}

.console > summary h2 {
    font-size: 1.25rem;
    font-weight: 680;
}

.console > p { color: var(--muted); max-width: 38em; }

.status {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 2rem;
    margin: 1.1rem 0;
}

.status dt {
    font-size: 0.8125rem;
    color: var(--muted);
}

.status dd {
    margin: 0;
    font-weight: 650;
    font-variant-numeric: tabular-nums;
}

.ctl {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;   /* the label sits on the first line of buttons, even when they wrap */
    gap: 0.4rem 1rem;
    margin: 0 0 0.9rem;
}

.ctl > .label { min-width: 9rem; }
.ctl > .row { flex: 1 1 18rem; min-width: 0; }   /* stays next to the label and wraps inside */
.ctl > .help { flex: 0 0 100%; margin: 0; padding-left: 10rem; }   /* under the buttons: label + gap */

.dial {
    display: inline-flex;
    flex-wrap: wrap;
    gap: 4px;
}

.dial button {
    font: inherit;
    font-variant-numeric: tabular-nums;
    width: 2.25rem;
    height: 2.25rem;
    border-radius: 7px;
    border: 1px solid var(--line);
    background: var(--surface);
    color: var(--ink);
    cursor: pointer;
}

.dial button:hover:not(:disabled) { border-color: var(--accent); }

input[type="number"] { width: 5.5rem; }

.tag {
    font-size: 0.8125rem;
    color: var(--warn);
    background: var(--warn-bg);
    padding: 2px 10px;
    border-radius: 999px;
}

.log {
    height: 16rem;
    overflow: auto;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--log-bg);
    color: var(--log-ink);
    font: 0.8125rem/1.5 var(--mono);
    white-space: pre-wrap;
    overflow-wrap: anywhere;
}

.log .l-tx { color: #8fd0ff; }
.log .l-ok { color: #7fe3a9; }
.log .l-err { color: #ff8e9c; }

.check {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0.6rem 0;
    font-size: 0.9375rem;
    color: var(--muted);
}

.cmd {
    display: flex;
    gap: 0.5rem;
}

.cmd input {
    flex: 1;
    min-width: 0;
    font-family: var(--mono);
}

/* ===== Footer ===== */
footer {
    width: min(calc(46rem - 32px), calc(100% - 32px));
    margin: 0 auto;
    padding: 1.5rem 0 2.5rem;
    border-top: 1px solid var(--line);
    font-size: 0.875rem;
    color: var(--muted);
}

footer p { margin: 0 0 0.4rem; max-width: 42em; }

.links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem 1.25rem;
}

@media (max-width: 560px) {
    .facts { grid-template-columns: minmax(0, 1fr); }
    .dial button { width: 1.95rem; height: 2.1rem; }
    .step { grid-template-columns: 2rem minmax(0, 1fr); gap: 0 0.8rem; }
    .num { width: 2rem; height: 2rem; font-size: 0.875rem; }
    .step::before { left: calc(1rem - 1px); top: 2.25rem; }
    .ctl > .label { min-width: 100%; }
    .ctl > .help { padding-left: 0; }
    .langs button { padding: 4px 9px; }
}