/* ArisOS front door: sign-in (/) and workspace chooser (/app/). Aris V3 tokens, light + dark.
   Static, no framework; strict CSP (no inline script or style). */

@font-face { font-family: "Source Sans 3"; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url(fonts/source-sans-3-latin-wght-normal.woff2) format("woff2");
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+0304, U+0308, U+0329, U+2000-206F, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD; }
@font-face { font-family: "Source Sans 3"; font-style: normal; font-weight: 200 900; font-display: swap;
  src: url(fonts/source-sans-3-latin-ext-wght-normal.woff2) format("woff2");
  unicode-range: U+0100-02BA, U+02BD-02C5, U+02C7-02CC, U+02CE-02D7, U+02DD-02FF, U+0304, U+0308, U+0329, U+1D00-1DBF, U+1E00-1E9F, U+1EF2-1EFF, U+2020, U+20A0-20AB, U+20AD-20C0, U+2113, U+2C60-2C7F, U+A720-A7FF; }
@font-face { font-family: "Source Serif 4"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/source-serif-4-latin-400-normal.woff2) format("woff2"); }
@font-face { font-family: "Source Code Pro"; font-style: normal; font-weight: 400; font-display: swap;
  src: url(fonts/source-code-pro-latin-400-normal.woff2) format("woff2"); }

:root {
  color-scheme: light;
  --pg: #F3F1EC; --sf: #FFFFFF; --sf2: #F7F5F1; --seg: #EAE7E1; --ln: #E8E4DC; --ln2: #8E8A80;
  --ink: #1A1917; --ink2: #4A4740; --ink3: #68645C;
  --ac: #1F5A6E; --acHover: #174757; --acInk: #FFFFFF; --ok: #2E6B3F; --err: #AE2E24;
  --toneAc: #E0E8EB; --toneMoss: #E2E7DF; --focusSoft: #DBE5E8; --rowHover: #F7F7F7;
  --cardSh: 0 0 0 1px rgba(20,19,17,0.05), 0 1px 2px rgba(20,19,17,0.03), 0 10px 30px rgba(20,19,17,0.06);
  --modalSh: 0 0 0 1px rgba(20,19,17,0.06), 0 16px 40px rgba(20,19,17,0.10), 0 40px 80px rgba(20,19,17,0.10);
  --acSh: 0 1px 2px rgba(31,90,110,0.22), 0 6px 16px rgba(31,90,110,0.16);
  --pgBg: radial-gradient(1000px 560px at 92% -6%, #DEE2DF, transparent 70%), radial-gradient(900px 640px at -8% 106%, #EDE6DB, transparent 70%), radial-gradient(700px 480px at 40% 55%, #E7E7DF, transparent 75%), #F3F1EC;
  --attnBg: linear-gradient(150deg, #E6EDEF 0%, #EFF2ED 60%, #F9F4EE 100%);
  --mark: url(aris-mark.png);
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    color-scheme: dark;
    --pg: #161615; --sf: #1D1D1B; --sf2: #242422; --seg: #20201E; --ln: #2E2E2B; --ln2: #807F79;
    --ink: #ECEAE4; --ink2: #B8B4AB; --ink3: #A39E95;
    --ac: #7CC4D6; --acHover: #9AD3E1; --acInk: #0E1416; --ok: #86CC98; --err: #F0907F;
    --toneAc: #324244; --toneMoss: #313B2C; --focusSoft: #384C4F; --rowHover: #282826;
    --cardSh: 0 0 0 1px #2A2A27, inset 0 1px 0 rgba(255,255,255,0.035), 0 2px 6px rgba(0,0,0,0.25), 0 14px 36px rgba(0,0,0,0.30);
    --modalSh: 0 0 0 1px #3A3A35, inset 0 1px 0 rgba(255,255,255,0.06), 0 32px 80px rgba(0,0,0,0.6);
    --acSh: 0 1px 2px rgba(0,0,0,0.4), 0 6px 18px rgba(124,196,214,0.14);
    --pgBg: radial-gradient(1000px 560px at 92% -6%, #242E30, transparent 70%), radial-gradient(900px 640px at -8% 106%, #282218, transparent 70%), radial-gradient(700px 480px at 40% 55%, #1E221C, transparent 75%), #161615;
    --attnBg: linear-gradient(150deg, #2C3839 0%, #252922 60%, #2C261C 100%);
    --mark: url(aris-mark-white.png);
  }
}
:root[data-theme="dark"] {
  color-scheme: dark;
  --pg: #161615; --sf: #1D1D1B; --sf2: #242422; --seg: #20201E; --ln: #2E2E2B; --ln2: #807F79;
  --ink: #ECEAE4; --ink2: #B8B4AB; --ink3: #A39E95;
  --ac: #7CC4D6; --acHover: #9AD3E1; --acInk: #0E1416; --ok: #86CC98; --err: #F0907F;
  --toneAc: #324244; --toneMoss: #313B2C; --focusSoft: #384C4F; --rowHover: #282826;
  --cardSh: 0 0 0 1px #2A2A27, inset 0 1px 0 rgba(255,255,255,0.035), 0 2px 6px rgba(0,0,0,0.25), 0 14px 36px rgba(0,0,0,0.30);
  --modalSh: 0 0 0 1px #3A3A35, inset 0 1px 0 rgba(255,255,255,0.06), 0 32px 80px rgba(0,0,0,0.6);
  --acSh: 0 1px 2px rgba(0,0,0,0.4), 0 6px 18px rgba(124,196,214,0.14);
  --pgBg: radial-gradient(1000px 560px at 92% -6%, #242E30, transparent 70%), radial-gradient(900px 640px at -8% 106%, #282218, transparent 70%), radial-gradient(700px 480px at 40% 55%, #1E221C, transparent 75%), #161615;
  --attnBg: linear-gradient(150deg, #2C3839 0%, #252922 60%, #2C261C 100%);
  --mark: url(aris-mark-white.png);
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  min-height: 100vh; background: var(--pgBg); color: var(--ink);
  font-family: "Source Sans 3", system-ui, -apple-system, sans-serif; font-size: 15px; line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--ac); }
a:hover { color: var(--acHover); }
:focus-visible { outline: 2px solid var(--ac); outline-offset: 2px; border-radius: 8px; }
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }

.mark { display: inline-block; width: 44px; aspect-ratio: 446 / 312; background: var(--mark) center / contain no-repeat; flex: none; }
.mark--sm { width: 36px; }
.mono { font-family: "Source Code Pro", ui-monospace, monospace; }
.eyebrow { font-family: "Source Code Pro", ui-monospace, monospace; font-size: 12px; letter-spacing: 0.12em; text-transform: uppercase; color: var(--ac); }
.eyebrow--ok { color: var(--ok); }

/* page grid */
.page { min-height: 100vh; display: grid; grid-template-columns: minmax(0, 1fr); }
@media (min-width: 980px) {
  .page { grid-template-columns: minmax(0, 1fr) minmax(460px, 600px); gap: 16px; padding: 16px; }
}

/* brand panel (decorative; hidden below 980px) */
.brand { display: none; }
@media (min-width: 980px) {
  .brand {
    display: flex; flex-direction: column; gap: 40px; min-height: calc(100vh - 32px);
    padding: 44px 52px 36px; border-radius: 24px; background: var(--attnBg); box-shadow: var(--cardSh);
  }
}
.brand__row { display: flex; align-items: center; gap: 12px; }
.brand__name { display: flex; flex-direction: column; line-height: 1.3; }
.brand__name b { font-size: 15px; font-weight: 500; }
.brand__name span { font-size: 12.5px; color: var(--ink2); }
.brand__pitch { margin-top: auto; display: flex; flex-direction: column; gap: 18px; max-width: 600px; }
.brand__pitch h2 { margin: 0; font-family: "Source Serif 4", Georgia, serif; font-size: 46px; font-weight: 400; line-height: 1.1; letter-spacing: -0.015em; text-wrap: balance; }
.brand__pitch p { margin: 0; font-size: 16.5px; color: var(--ink2); max-width: 46ch; text-wrap: pretty; }
.tiles { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px; max-width: 600px; margin: 0; padding: 0; list-style: none; }
.tile { display: flex; gap: 14px; align-items: center; padding: 16px 18px; border-radius: 20px; background: var(--sf); box-shadow: var(--cardSh); }
.glyph { width: 40px; height: 40px; flex: none; border-radius: 12px; display: grid; place-items: center; font-weight: 500; }
.glyph--ac { background: var(--toneAc); }
.glyph--moss { background: var(--toneMoss); }
.tile__text { display: flex; flex-direction: column; line-height: 1.35; min-width: 0; }
.tile__text b { font-size: 15px; font-weight: 500; }
.tile__text span { font-size: 13px; color: var(--ink2); }
.brand__foot { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; font-size: 12px; color: var(--ink2); }
.brand__foot span:last-child { margin-left: auto; }

/* main column */
.main { display: flex; flex-direction: column; min-width: 0; padding: 20px 32px 28px; min-height: 100vh; }
@media (min-width: 980px) { .main { min-height: calc(100vh - 32px); } }
@media (max-width: 559px) { .main { padding: 16px 16px 24px; } }
.topbar { display: flex; align-items: center; gap: 12px; }
.topbar__brand { display: flex; align-items: center; gap: 10px; font-size: 15px; font-weight: 500; }
@media (min-width: 980px) { .topbar__brand { visibility: hidden; } }
.theme {
  margin-left: auto; height: 40px; padding: 0 12px; display: flex; align-items: center; gap: 8px; border: 0;
  border-radius: 12px; background: transparent; color: var(--ink2); font: inherit; font-size: 13.5px; cursor: pointer;
  transition: background-color .15s ease, color .15s ease;
}
.theme:hover { background: var(--sf); color: var(--ink); }
.stage { flex: 1; display: grid; place-items: center; padding: 32px 0; }
.card {
  width: 100%; max-width: 480px; display: flex; flex-direction: column; gap: 24px;
  background: var(--sf); border-radius: 24px; box-shadow: var(--modalSh); padding: 40px;
}
@media (min-width: 980px) { .card { max-width: 400px; background: transparent; box-shadow: none; padding: 0; } }
@media (max-width: 559px) { .card { background: transparent; box-shadow: none; padding: 0; } }
.card__head { display: flex; flex-direction: column; gap: 6px; }
.card__head h1 { margin: 0; font-family: "Source Serif 4", Georgia, serif; font-size: 34px; font-weight: 400; line-height: 1.15; letter-spacing: -0.01em; outline: none; }
.card__head p { margin: 0; color: var(--ink2); text-wrap: pretty; }

/* buttons */
.btn {
  height: 48px; display: flex; align-items: center; justify-content: center; gap: 12px; width: 100%;
  border-radius: 12px; font: inherit; font-size: 15px; font-weight: 500; text-decoration: none; cursor: pointer;
  transition: background-color .15s ease, border-color .15s ease, transform .08s ease;
}
.btn--sso { border: 1px solid var(--ln2); background: var(--sf); color: var(--ink); }
.btn--sso:hover { background: var(--sf2); border-color: var(--ink3); color: var(--ink); }
.btn--primary { border: 0; background: var(--ac); color: var(--acInk); box-shadow: var(--acSh); font-weight: 600; }
.btn--primary:hover { background: var(--acHover); color: var(--acInk); }
.btn--primary:active { transform: translateY(1px); box-shadow: none; }
.sso { display: flex; flex-direction: column; gap: 10px; }
.sso[hidden], .divider[hidden], .btn[hidden] { display: none; }
.who-retry { margin-top: 8px; }
.who-retry a { color: var(--ac, currentColor); text-underline-offset: 3px; }
.divider { display: flex; align-items: center; gap: 12px; font-size: 13px; color: var(--ink3); }
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--ln); }
.method { display: flex; flex-direction: column; gap: 10px; }
.method p { margin: 0; font-size: 13.5px; color: var(--ink2); text-wrap: pretty; }

/* help disclosure */
.help { display: flex; flex-direction: column; gap: 10px; border-top: 1px solid var(--ln); padding-top: 16px; }
.help__toggle {
  align-self: flex-start; height: 40px; padding: 0 12px 0 10px; margin-left: -10px; display: flex; align-items: center; gap: 8px;
  border: 0; border-radius: 12px; background: transparent; color: var(--ink); font: inherit; font-size: 14px; font-weight: 500; cursor: pointer;
}
.help__toggle:hover { background: var(--sf2); }
.help__toggle .chev { transition: transform .15s ease; }
.help__toggle[aria-expanded="true"] .chev { transform: rotate(180deg); }
.help__list { display: flex; flex-direction: column; padding: 6px; border-radius: 16px; background: var(--sf); box-shadow: var(--cardSh); margin: 0; list-style: none; }
.help__list[hidden] { display: none; }
.help__item { display: flex; flex-direction: column; align-items: flex-start; padding: 10px 12px; border-radius: 12px; color: var(--ink); text-decoration: none; }
a.help__item:hover { background: var(--rowHover); color: var(--ink); }
.help__item b { font-size: 14px; font-weight: 500; }
.help__item span { font-size: 13px; color: var(--ink2); }

/* chooser */
.spaces { display: flex; flex-direction: column; gap: 10px; margin: 0; padding: 0; list-style: none; }
.space {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px; border-radius: 16px; border: 1px solid var(--ln);
  background: var(--sf); color: var(--ink); text-decoration: none; transition: background-color .15s ease, border-color .15s ease;
}
.space:hover { background: var(--rowHover); border-color: var(--ln2); color: var(--ink); }
.space .tile__text { flex: 1; }
.space svg { color: var(--ink2); flex: none; }
.signout {
  align-self: flex-start; height: 40px; padding: 0 12px; margin-left: -12px; display: inline-flex; align-items: center;
  border-radius: 12px; color: var(--ink); font-size: 14px; font-weight: 500; text-decoration: none;
}
.signout:hover { background: var(--sf2); color: var(--ink); }

/* footer */
.foot { display: flex; flex-direction: column; gap: 10px; align-items: center; text-align: center; font-size: 13px; color: var(--ink2); }
.foot__line { display: block; max-width: 46ch; text-wrap: balance; }
.foot__line svg { display: inline-block; vertical-align: -2px; margin-right: 6px; }

@media (prefers-reduced-motion: reduce) { * { transition: none !important; } }