/* ═══════════════════════════════════════════════════════════════════
   ArbKeep — shared UI components (ui.css)
   The layer above brand.css: brand.css holds the TOKENS, this file holds
   the COMPONENTS built from them, defined once for every page.

   Physical duplicate of arbkeep/public/css/ui.css (the two Pages projects
   don't share a build) — design-lint fails the build if they differ.

   Rules (design-lint enforces them):
   - Tokens only. No raw hex / rgb(), no raw border-radius — reach for
     brand.css (add a token there first if the role is genuinely new).
   - A class defined here is owned here. Pages may PLACE a component
     (`.brand .pro-pill{margin-left:8px}`) but may not restyle it
     (`.pro-pill{…}` in a page's <style> fails the lint).

   Load after brand.css:
     <link rel="stylesheet" href="/css/brand.css">
     <link rel="stylesheet" href="/css/ui.css">
   ═══════════════════════════════════════════════════════════════════ */

/* ─── Tier pill — the lockup suffix beside the wordmark: ARBKEEP [PRO] on
   Pro, ARBKEEP [HOME] on Home. One look for both tiers; each app uses only
   its own (design-lint). BRAND.md → Wordmark → Lockup with tier suffix.
   Decorative micro-label (uppercase + letterspaced), so it sits at the
   12px floor, not the content floor. */
.pro-pill,.home-pill{display:inline-flex;align-items:center;padding:3px 9px;border:1px solid var(--lilac-stroke);border-radius:var(--r-pill);color:var(--lilac);font-family:var(--sans);font-weight:400;font-size:12.5px;letter-spacing:.2em;text-transform:uppercase;line-height:1}

/* ─── Sun / dark switch — markup is <button data-theme-toggle></button>;
   js/theme.js fills in the knob + icons and wires the click. The visual is
   26px tall; the ::after pad extends the hit area to the 44px tap floor
   (BRAND.md → --tap-min). ─── */
.theme-toggle{position:relative;flex-shrink:0;width:46px;height:26px;padding:0;border-radius:var(--r-pill);border:1px solid var(--divider-strong);background:var(--bg-input);cursor:pointer}
.theme-toggle::after{content:"";position:absolute;inset:calc((26px - var(--tap-min)) / 2) -4px}
.theme-toggle:active{transform:scale(.96)}
.theme-toggle .tt-knob{position:absolute;top:2px;left:2px;width:20px;height:20px;border-radius:50%;background:var(--lichen);display:flex;align-items:center;justify-content:center;box-shadow:var(--knob-shadow);transition:transform .18s ease}
.theme-toggle .tt-knob svg{width:12px;height:12px;fill:none;stroke:var(--bg);stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.theme-toggle .tt-sun{display:none}
html[data-theme="sun"] .theme-toggle .tt-knob{transform:translateX(20px)}
html[data-theme="sun"] .theme-toggle .tt-moon{display:none}
html[data-theme="sun"] .theme-toggle .tt-sun{display:block}

/* ─── Sign-in template — the one door into the product: Pro sign-in, Pro
   sign-up, Home sign-in (BRAND.md → Named variants, joined 2026-09-10).
     <body class="signin">
       <div class="signin-theme"><button data-theme-toggle></button></div>
       <main class="signin-wrap">
         <div class="signin-mark" id="…"></div>        seasonal ATCMark art
         <h1 class="signin-lockup">wordmark + .pro-pill / .home-pill</h1>
         <p class="signin-sub">…</p>
         <div class="signin-card">
           <div class="signin-error"></div>             .visible shows it
           <div class="signin-field"><label class="signin-label">…</label>
             <input class="signin-input"></div>
           <button class="signin-btn">…</button>
         </div>
         <p class="signin-foot">… <a>…</a></p>
         <p class="signin-powered">Powered by ArbKeep · Terms · Privacy</p>
       </main>
   Content text sits at 17px so the one shared file clears Home's floor as
   well as Pro's; uppercase labels and buttons are decorative (12px floor).
   The primary is the Regular button to spec (BRAND.md → Buttons). ─── */
:where(.signin) *{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}
.signin{box-sizing:border-box;min-height:calc(100vh / var(--ui-zoom));min-height:calc(100dvh / var(--ui-zoom));display:flex;flex-direction:column;align-items:center;justify-content:center;padding:56px 20px 32px;background:var(--canopy-glow) no-repeat,var(--field);color:var(--text);font-family:var(--sans);font-weight:300;line-height:1.5;-webkit-font-smoothing:antialiased}
.signin-theme{position:fixed;top:calc(16px + env(safe-area-inset-top));right:16px;z-index:5}
.signin-wrap{width:100%;max-width:460px;display:flex;flex-direction:column;align-items:center;animation:signin-in .8s ease-out both}
@keyframes signin-in{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.signin-mark{width:100px;margin-bottom:24px;opacity:.85}
.signin-lockup{display:flex;align-items:center;justify-content:center;flex-wrap:wrap;gap:12px;font-family:var(--serif);font-weight:400;font-size:36px;letter-spacing:.06em;line-height:1.1;margin-bottom:12px}
.signin-sub{text-wrap:balance;font-size:17px;letter-spacing:.04em;line-height:1.6;color:var(--text-secondary);text-align:center;margin-bottom:28px}
.signin-keep{white-space:nowrap} /* a tagline phrase that never splits: lines break between phrases */
.signin-card{width:100%;background:var(--bg-card);border:1px solid var(--divider);border-radius:var(--r-panel);padding:28px 24px}
.signin-card-title{font-family:var(--serif);font-weight:400;font-size:26px;line-height:1.2;margin-bottom:6px}
.signin-hint{font-size:17px;line-height:1.55;color:var(--text-secondary);margin-bottom:20px}
.signin-field{width:100%;margin-bottom:18px}
.signin-label{display:block;font-size:14px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;color:var(--lichen-bright);margin-bottom:8px}
.signin-input{display:block;width:100%;min-height:var(--tap-min);padding:15px 18px;font-family:var(--sans);font-weight:300;font-size:18px;color:var(--text);background:var(--bg-input);border:1px solid var(--divider-strong);border-radius:var(--r-ctl);outline:none;transition:border-color .2s;-webkit-appearance:none;appearance:none}
.signin-input::placeholder{color:var(--text-muted)}
.signin-input:focus{border-color:var(--lilac)}
.signin-btn{display:flex;align-items:center;justify-content:center;width:100%;min-height:56px;padding:14px 20px;border:1px solid transparent;border-radius:var(--r-ctl);background:var(--lilac);color:var(--bg);font-family:var(--sans);font-size:16px;font-weight:400;letter-spacing:.1em;text-transform:uppercase;text-align:center;text-decoration:none;cursor:pointer;transition:filter .2s,transform .1s}
.signin-btn:hover{filter:brightness(1.08)}
.signin-btn:active{transform:scale(.99)}
.signin-btn:disabled{opacity:.5;cursor:not-allowed;filter:none}
.signin-btn--secondary{background:var(--bg-card);color:var(--lilac);border-color:var(--lilac-stroke)}
.signin-error{display:none;width:100%;margin-bottom:16px;padding:12px 16px;border-radius:var(--r-ctl);background:var(--staghorn-dim);color:var(--staghorn);font-size:17px;line-height:1.5}
.signin-error.visible{display:block}
.signin-error a{color:var(--lilac);text-decoration:none}
.signin-note{text-wrap:balance;font-size:17px;line-height:1.6;color:var(--text-secondary);text-align:center}
.signin-note a,.signin-foot a{color:var(--lilac);text-decoration:none}
.signin-foot{text-wrap:balance;margin-top:24px;font-size:17px;line-height:1.6;color:var(--text-secondary);text-align:center}
.signin-powered{text-wrap:balance;margin-top:24px;font-size:12px;letter-spacing:.14em;text-transform:uppercase;line-height:2;color:var(--text-secondary);text-align:center}
.signin-powered a{color:inherit;text-decoration:none}
.signin-powered a:hover{color:var(--lichen-bright)}
/* "Check your email" — the sent state (Home magic link, Pro verify code). */
.signin-sent-icon{width:68px;height:68px;margin:0 auto 24px;border:1.5px solid var(--lilac-stroke);border-radius:50%;display:flex;align-items:center;justify-content:center;color:var(--lilac)}
.signin-sent-icon svg{width:30px;height:30px;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}
.signin-title{font-family:var(--serif);font-weight:400;font-size:32px;line-height:1.2;text-align:center;margin-bottom:12px}
.signin-addr{font-size:20px;letter-spacing:.02em;color:var(--lilac);text-align:center;overflow-wrap:anywhere;margin-bottom:24px}
.signin-textbtn{min-height:var(--tap-min);padding:0 12px;background:none;border:none;font-family:var(--sans);font-size:15px;font-weight:400;letter-spacing:.12em;text-transform:uppercase;color:var(--text-secondary);cursor:pointer}
.signin-textbtn:hover{color:var(--lilac)}
@media (max-width:420px){.signin-card{padding:22px 18px}.signin-lockup{font-size:32px}}
/* AI orb — the Ask-Shigo mark: berry body, moss crossfade, breathing glow.
   Place .ai-orb on the button; the page positions and sizes it (it must be
   positioned — every FAB is fixed). shigo-orb.js drops the seeded rings on top.
   Colours are brand.css --orb-* tokens. */
.ai-orb{border-radius:50%;border:1px solid var(--orb-rim);background:var(--orb-berry);overflow:hidden;isolation:isolate;animation:shigoGlow 5s ease-in-out infinite alternate}
.ai-orb::after{content:"";position:absolute;inset:0;border-radius:inherit;background:var(--orb-moss);animation:shigoShift 5s ease-in-out infinite alternate}
@keyframes shigoShift{0%{opacity:1}100%{opacity:0}}
@keyframes shigoGlow{0%{box-shadow:var(--orb-glow-moss)}100%{box-shadow:var(--orb-glow-berry)}}
@media (prefers-reduced-motion:reduce){.ai-orb,.ai-orb::after{animation:none}.ai-orb::after{opacity:.4}}
