/* ============================================================
 * sir.gg · shared UI (2026-10 redesign)
 *
 * Black canvas, one type family, colour only for state.
 * Green = available / ok, red = taken / error / danger,
 * amber = warning. Nothing else is coloured.
 *
 * Fonts (load in each page <head>):
 *   https://fonts.googleapis.com/css2?family=Funnel+Display:wght@500;700;800&family=Funnel+Sans:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap
 * ============================================================ */
@layer reset, tokens, base, components, utilities;

@layer reset {
  :where(*, *::before, *::after) { box-sizing: border-box; }
  :where(html, body, h1, h2, h3, h4, p, ul, ol, figure, dl, dd, blockquote) { margin: 0; padding: 0; }
  :where(ul, ol) { list-style: none; }
  :where(img, svg, video) { display: block; max-inline-size: 100%; }
  :where(button, input, select, textarea) { font: inherit; color: inherit; }
  :where(button) { background: none; border: 0; cursor: pointer; }
  :where(table) { border-collapse: collapse; }
}

@layer tokens {
  :root {
    color-scheme: dark;
    --canvas: #000;
    --raised: #0c0c0d;
    --raised-2: #141416;
    --raised-3: #1b1b1e;
    --fg: #f5f5f4;
    --body: #b9b9bd;
    --muted: #8c8c92;
    --faint: #7c7c82;
    --line: #222225;
    --line-2: #323238;
    --line-3: #46464e;
    --free: #3ecf8e;
    --taken: #ff5d5d;
    --warn: #f5b84b;
    --display: 'Funnel Display', 'Helvetica Neue', Arial, sans-serif;
    --sans: 'Funnel Sans', 'Helvetica Neue', Arial, sans-serif;
    --mono: 'JetBrains Mono', ui-monospace, Menlo, monospace;
    --r-sm: 6px;
    --r: 10px;
    --r-lg: 16px;
    --wrap: 74rem;
    --gutter: clamp(1rem, 4vw, 2.5rem);
    --ease: cubic-bezier(.2, .8, .2, 1);
    --logo-glow: drop-shadow(0 0 10px rgb(255 255 255 / .45)) drop-shadow(0 0 26px rgb(255 255 255 / .18));
  }
}

@layer base {
  html { scroll-behavior: smooth; scroll-padding-top: 6rem; -webkit-text-size-adjust: 100%; }
  @media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } }
  body {
    min-block-size: 100dvh;
    background: var(--canvas);
    color: var(--body);
    font-family: var(--sans);
    font-size: 1rem;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    overflow-x: clip;
    accent-color: var(--fg);
    caret-color: var(--fg);
    scrollbar-color: var(--line-2) var(--canvas);
  }
  ::selection { background: var(--fg); color: #000; }
  a { color: inherit; }
  h1, h2, h3, h4 { color: var(--fg); font-family: var(--display); text-wrap: balance; letter-spacing: -.02em; line-height: 1.1; }
  p { text-wrap: pretty; }
  :where(a, button, input, select, textarea, summary, [tabindex]):focus-visible { outline: 2px solid var(--fg); outline-offset: 2px; border-radius: var(--r-sm); }
  [hidden] { display: none !important; }
}

@layer components {

  /* ---------- layout ---------- */
  .wrap { inline-size: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }
  .wrap-narrow { inline-size: min(100% - 2 * var(--gutter), 30rem); margin-inline: auto; }

  /* ---------- floating top bar (nav.js adds .scrolled / .compact) ---------- */
  .tnav {
    --nav-h: 56px; --nav-h-compact: 48px;
    position: sticky; top: 12px; z-index: 50;
    display: flex; align-items: center; gap: 1.25rem;
    inline-size: min(100% - 24px, var(--wrap)); margin: 12px auto 0;
    block-size: var(--nav-h); padding-inline: 1rem .5rem;
    background: rgb(14 14 15 / .72);
    -webkit-backdrop-filter: blur(18px) saturate(140%); backdrop-filter: blur(18px) saturate(140%);
    border: 1px solid var(--line-2); border-radius: 14px;
    box-shadow: 0 6px 16px rgb(0 0 0 / .35);
    transition: block-size .4s var(--ease), inline-size .5s var(--ease), top .4s var(--ease), margin .4s var(--ease), background-color .25s;
  }
  .tnav.scrolled { background: rgb(14 14 15 / .86); }
  .tnav.compact { block-size: var(--nav-h-compact); inline-size: min(100% - 24px, 58rem); top: 8px; margin-block-end: calc(var(--nav-h) - var(--nav-h-compact)); }
  .tnav.no-anim, .tnav.no-anim * { transition: none !important; }
  .tnav .brand { display: inline-flex; align-items: center; gap: .6rem; text-decoration: none; color: var(--fg); font-family: var(--display); font-weight: 700; font-size: 1.15rem; letter-spacing: -.02em; flex-shrink: 0; }
  .tnav .brand img { inline-size: 30px; block-size: 30px; filter: var(--logo-glow); transition: inline-size .4s var(--ease), block-size .4s var(--ease); }
  .tnav.compact .brand img { inline-size: 26px; block-size: 26px; }
  /* centre links sit in one grouped tray; the current page gets the lifted tab */
  .tnav .links { display: flex; align-items: center; gap: 2px; margin-inline: auto; padding: 3px; border: 1px solid var(--line); border-radius: 12px; background: var(--raised); }
  .tnav .links a { padding: .42rem .8rem; border-radius: 9px; text-decoration: none; color: var(--muted); font-size: .92rem; transition: color .2s, background-color .2s; }
  .tnav .links a:hover { color: var(--fg); }
  .tnav .links a[aria-current="page"] { color: var(--fg); background: var(--raised-3); font-weight: 500; }
  .tnav .end { display: flex; align-items: center; gap: .4rem; margin-inline-start: auto; }
  .tnav .links + .end { margin-inline-start: 0; }
  .tnav .notice { display: inline-flex; align-items: center; gap: .5rem; min-inline-size: 0; font-size: .85rem; color: var(--body); }
  .tnav .notice .txt { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .tnav .notice i { inline-size: 6px; block-size: 6px; border-radius: 50%; background: var(--fg); flex-shrink: 0; }
  @media (width < 860px) {
    .tnav { padding-inline: .8rem .4rem; gap: .6rem; }
    .tnav .links, .tnav .notice, .tnav .hide-sm { display: none; }
    .tnav .end, .tnav .links + .end { margin-inline-start: auto; }
  }
  @media (prefers-reduced-motion: reduce) { .tnav, .tnav .brand img { transition: background-color .2s; } }

  /* ---------- buttons ---------- */
  .btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
    min-block-size: 2.5rem; padding-inline: 1rem; border-radius: var(--r);
    border: 1px solid transparent;
    font-family: var(--sans); font-weight: 600; font-size: .92rem; line-height: 1; text-decoration: none; white-space: nowrap;
    cursor: pointer; user-select: none;
    transition: background-color .18s, border-color .18s, color .18s, transform .12s var(--ease), opacity .18s;
  }
  .btn:active:not(:disabled) { transform: translateY(1px); }
  .btn:disabled, .btn[aria-disabled="true"] { opacity: .45; cursor: not-allowed; }
  .btn svg { inline-size: 1rem; block-size: 1rem; flex-shrink: 0; }
  .btn-primary { background: var(--fg); color: #000; }
  .btn-primary:hover:not(:disabled) { background: #d9d9d6; }
  .btn-ghost { color: var(--fg); border-color: var(--line-2); background: transparent; }
  .btn-ghost:hover:not(:disabled) { background: var(--raised-2); border-color: var(--line-3); }
  .btn-quiet { color: var(--body); background: transparent; }
  .btn-quiet:hover:not(:disabled) { color: var(--fg); background: var(--raised-2); }
  .btn-danger { color: var(--taken); border-color: color-mix(in oklab, var(--taken) 40%, transparent); background: transparent; }
  .btn-danger:hover:not(:disabled) { background: color-mix(in oklab, var(--taken) 12%, transparent); }
  .btn-sm { min-block-size: 2rem; padding-inline: .7rem; font-size: .84rem; border-radius: 8px; }
  .btn-lg { min-block-size: 3.1rem; padding-inline: 1.35rem; font-size: 1rem; }
  .btn-icon { inline-size: 2.25rem; min-block-size: 2.25rem; padding: 0; border-radius: 8px; }
  .btn-block { inline-size: 100%; }

  /* ---------- form controls ---------- */
  .label { display: block; margin-block-end: .4rem; font-size: .84rem; font-weight: 500; color: var(--body); }
  .hint { margin-block-start: .35rem; font-size: .8rem; color: var(--muted); }
  .input, .select, .textarea {
    inline-size: 100%; min-block-size: 2.6rem; padding: .55rem .8rem;
    border: 1px solid var(--line-2); border-radius: var(--r); background: var(--raised);
    color: var(--fg); font-size: 1rem; outline: 0;
    transition: border-color .18s, background-color .18s;
  }
  .textarea { min-block-size: 5rem; resize: vertical; line-height: 1.45; }
  .input::placeholder, .textarea::placeholder { color: var(--faint); opacity: 1; }
  .input:hover, .select:hover, .textarea:hover { border-color: var(--line-3); }
  .input:focus, .select:focus, .textarea:focus { border-color: #6a6a72; background: var(--raised-2); }
  .input[aria-invalid="true"] { border-color: color-mix(in oklab, var(--taken) 70%, transparent); }
  .input.mono, .mono-input { font-family: var(--mono); font-size: .95rem; }
  .select { appearance: none; padding-inline-end: 2.2rem; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none' stroke='%238c8c92' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='m6 8 4 4 4-4'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right .7rem center; background-size: 1rem; }
  /* prefixed input: <div class="affix"><span>sir.gg/</span><input></div> */
  .affix { display: flex; align-items: center; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--raised); transition: border-color .18s, background-color .18s; }
  .affix:focus-within { border-color: #6a6a72; background: var(--raised-2); }
  .affix > span { padding-inline-start: .8rem; font-family: var(--mono); font-size: .95rem; color: var(--muted); user-select: none; white-space: nowrap; }
  .affix > input { flex: 1; min-inline-size: 0; border: 0; background: none; outline: 0; padding: .55rem .8rem .55rem .1rem; min-block-size: 2.5rem; font-family: var(--mono); font-size: .95rem; color: var(--fg); }
  .affix > input::placeholder { color: var(--faint); }
  .field { display: grid; gap: 0; }
  .field + .field { margin-block-start: 1rem; }
  .row-fields { display: grid; grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr)); gap: 1rem; }

  /* switch: <label class="switch"><input type="checkbox"><span></span> Text</label> */
  .switch { display: inline-flex; align-items: center; gap: .65rem; cursor: pointer; font-size: .92rem; color: var(--body); }
  .switch input { position: absolute; opacity: 0; inline-size: 1px; block-size: 1px; }
  .switch span { position: relative; inline-size: 2.2rem; block-size: 1.3rem; border-radius: 1rem; background: var(--line-2); transition: background-color .2s; flex-shrink: 0; }
  .switch span::after { content: ''; position: absolute; inset-block-start: 3px; inset-inline-start: 3px; inline-size: calc(1.3rem - 6px); block-size: calc(1.3rem - 6px); border-radius: 50%; background: var(--fg); transition: translate .2s var(--ease); }
  .switch input:checked + span { background: var(--free); }
  .switch input:checked + span::after { translate: .9rem 0; background: #000; }
  .switch input:focus-visible + span { outline: 2px solid var(--fg); outline-offset: 2px; }

  /* ---------- surfaces ---------- */
  .panel { border: 1px solid var(--line); border-radius: var(--r-lg); background: var(--raised); }
  .panel-pad { padding: clamp(1rem, 2.5vw, 1.5rem); }
  .panel-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.25rem; border-block-end: 1px solid var(--line); }
  .panel-head h2, .panel-head h3 { font-size: 1rem; font-family: var(--sans); font-weight: 600; letter-spacing: 0; }
  .divider { block-size: 1px; background: var(--line); border: 0; margin-block: 1rem; }

  /* page heading block used by app pages */
  .page-head { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 1rem; margin-block: clamp(1.5rem, 4vw, 2.5rem) 1.5rem; }
  .page-head h1 { font-size: clamp(1.8rem, 1.3rem + 2vw, 2.6rem); font-weight: 700; letter-spacing: -.035em; }
  .page-head p { margin-block-start: .3rem; color: var(--muted); }

  /* metrics */
  .metrics { display: grid; grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr)); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-lg); overflow: hidden; }
  .metric { background: var(--raised); padding: 1rem 1.15rem; }
  .metric .k { font-size: .8rem; color: var(--muted); }
  .metric .v { margin-block-start: .2rem; font-family: var(--display); font-weight: 700; font-size: 1.7rem; letter-spacing: -.03em; color: var(--fg); font-variant-numeric: tabular-nums; line-height: 1.1; }

  /* tags (small status labels, rounded rect, never pills) */
  .tag { display: inline-flex; align-items: center; gap: .35rem; padding: .15rem .45rem; border-radius: var(--r-sm); border: 1px solid var(--line-2); font-size: .74rem; font-weight: 500; line-height: 1.4; color: var(--body); white-space: nowrap; }
  .tag i { inline-size: 6px; block-size: 6px; border-radius: 50%; background: currentColor; }
  .tag.ok { color: var(--free); border-color: color-mix(in oklab, var(--free) 35%, transparent); }
  .tag.bad { color: var(--taken); border-color: color-mix(in oklab, var(--taken) 35%, transparent); }
  .tag.warn { color: var(--warn); border-color: color-mix(in oklab, var(--warn) 35%, transparent); }

  /* lists / tables */
  .list > li, .list > a { display: flex; align-items: center; gap: 1rem; padding: .8rem 1.25rem; border-block-end: 1px solid var(--line); text-decoration: none; }
  .list > :last-child { border-block-end: 0; }
  .list > a:hover, .list > li.clickable:hover { background: var(--raised-2); }
  .table { inline-size: 100%; font-size: .9rem; }
  .table th { text-align: start; font-weight: 500; font-size: .78rem; color: var(--muted); padding: .65rem 1rem; border-block-end: 1px solid var(--line); white-space: nowrap; }
  .table td { padding: .7rem 1rem; border-block-end: 1px solid var(--line); color: var(--body); vertical-align: middle; }
  .table tr:last-child td { border-block-end: 0; }
  .table tbody tr:hover td { background: var(--raised-2); }
  .table .num, .num { font-variant-numeric: tabular-nums; }
  .table .end { text-align: end; }
  .table-scroll { overflow-x: auto; }
  .slug { font-family: var(--mono); color: var(--fg); }
  .slug em { font-style: normal; color: var(--faint); }

  /* tabs / segmented */
  .seg { display: inline-flex; flex-wrap: wrap; padding: 3px; border: 1px solid var(--line-2); border-radius: 11px; background: var(--raised); }
  .seg button, .seg a { min-block-size: 2.1rem; padding-inline: .8rem; border-radius: 8px; font-size: .86rem; color: var(--muted); text-decoration: none; display: inline-flex; align-items: center; transition: background-color .18s, color .18s; }
  .seg [aria-pressed="true"], .seg [aria-selected="true"], .seg [aria-current="page"] { background: var(--fg); color: #000; font-weight: 600; }
  .seg button:not([aria-pressed="true"]):not([aria-selected="true"]):hover { color: var(--fg); }

  /* empty / loading */
  .empty { padding: 2.5rem 1.25rem; text-align: center; color: var(--muted); }
  .empty b { display: block; color: var(--fg); font-weight: 600; margin-block-end: .25rem; }
  .skel { border-radius: var(--r-sm); background: linear-gradient(90deg, var(--raised-2), var(--raised-3), var(--raised-2)); background-size: 200% 100%; animation: skel 1.2s linear infinite; }
  @keyframes skel { to { background-position: -200% 0; } }
  @media (prefers-reduced-motion: reduce) { .skel { animation: none; } }

  /* inline notes */
  .note { padding: .75rem .9rem; border: 1px solid var(--line-2); border-radius: var(--r); font-size: .88rem; color: var(--body); }
  .note.bad { border-color: color-mix(in oklab, var(--taken) 45%, transparent); }
  .note.ok { border-color: color-mix(in oklab, var(--free) 45%, transparent); }
  .note.warn { border-color: color-mix(in oklab, var(--warn) 45%, transparent); }
  .note b { color: var(--fg); }
  .note.bad b { color: var(--taken); } .note.ok b { color: var(--free); } .note.warn b { color: var(--warn); }

  /* dialog: <dialog class="sheet" closedby="any"> */
  dialog.sheet { inline-size: min(100% - 2rem, 30rem); max-block-size: min(100dvh - 2rem, 44rem); padding: 0; border: 1px solid var(--line-2); border-radius: var(--r-lg); background: var(--raised); color: var(--body); box-shadow: 0 10px 24px rgb(0 0 0 / .5); }
  dialog.sheet.wide { inline-size: min(100% - 2rem, 44rem); }
  dialog.sheet::backdrop { background: rgb(0 0 0 / .72); }
  dialog.sheet[open] { animation: sheetIn .22s var(--ease); }
  @keyframes sheetIn { from { opacity: 0; translate: 0 8px; } }
  .sheet-head { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1.1rem 1.25rem; border-block-end: 1px solid var(--line); }
  .sheet-head h2 { font-size: 1.15rem; font-weight: 700; }
  .sheet-body { padding: 1.25rem; overflow-y: auto; }
  .sheet-foot { display: flex; justify-content: flex-end; gap: .5rem; padding: 1rem 1.25rem; border-block-start: 1px solid var(--line); }
  @media (prefers-reduced-motion: reduce) { dialog.sheet[open] { animation: none; } }

  /* toast: <div class="toasts" aria-live="polite"></div> */
  .toasts { position: fixed; z-index: 90; inset-block-end: max(1rem, env(safe-area-inset-bottom)); inset-inline: 0; display: grid; justify-items: center; gap: .5rem; pointer-events: none; }
  .toast { pointer-events: auto; display: flex; align-items: center; gap: .6rem; max-inline-size: min(100% - 2rem, 26rem); padding: .7rem 1rem; border: 1px solid var(--line-2); border-radius: var(--r); background: var(--raised-3); color: var(--fg); font-size: .9rem; box-shadow: 0 8px 20px rgb(0 0 0 / .45); animation: sheetIn .2s var(--ease); }
  .toast.bad { border-color: color-mix(in oklab, var(--taken) 55%, transparent); }
  .toast.ok { border-color: color-mix(in oklab, var(--free) 55%, transparent); }

  /* footer */
  .foot { border-block-start: 1px solid var(--line); padding-block: 2.5rem 3rem; font-size: .88rem; margin-block-start: 4rem; }
  .foot-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1rem 1.5rem; align-items: center; }
  .foot .brand { display: inline-flex; align-items: center; gap: .5rem; text-decoration: none; color: var(--fg); font-family: var(--display); font-weight: 700; }
  .foot .brand img { inline-size: 24px; block-size: 24px; filter: var(--logo-glow); }
  .foot-links { display: flex; flex-wrap: wrap; gap: .4rem 1.3rem; }
  .foot-links a { color: var(--muted); text-decoration: none; }
  .foot-links a:hover { color: var(--fg); }
  .fine { margin-block-start: 1.4rem; max-inline-size: 62rem; font-size: .8rem; line-height: 1.6; color: var(--faint); }
  .fine b, .fine a { color: var(--muted); }
}

@layer utilities {
  .sr-only { position: absolute; inline-size: 1px; block-size: 1px; overflow: hidden; clip-path: inset(50%); white-space: nowrap; }
  .mono { font-family: var(--mono); }
  .muted { color: var(--muted); }
  .fg { color: var(--fg); }
  .grow { flex: 1; }
  .stack > * + * { margin-block-start: 1rem; }
  .cluster { display: flex; flex-wrap: wrap; align-items: center; gap: .5rem; }
  .ok-text { color: var(--free); } .bad-text { color: var(--taken); } .warn-text { color: var(--warn); }
}