/* BoomBigNose Learn — login page · Night Workshop palette
   Self-contained: this stylesheet is the only stylesheet on /learn/ so
   the login surface stays small and stable while the SPA build at
   app.boombignose.org takes over the authenticated experience. */

:root {
  --bg:        #0b0c10;
  --bg-2:      #101218;
  --bg-3:      #161823;
  --line:      rgba(231, 226, 211, 0.08);
  --line-2:    rgba(231, 226, 211, 0.16);
  --line-3:    rgba(231, 226, 211, 0.28);

  --text:      #ece7d6;
  --text-2:    #b9b4a4;
  --text-3:    #82806f;
  --mute:      #5e5d52;

  --coral:     #ff5a45;
  --coral-2:   #ff8169;
  --coral-glow:rgba(255, 90, 69, 0.22);
  --amber:     #f5c45e;
  --cyan:      #5fd4ff;
  --lime:      #c6ff5a;

  --display:   'Bricolage Grotesque', 'IBM Plex Sans Thai Looped', system-ui, sans-serif;
  --editorial: 'Instrument Serif', 'Noto Serif Thai', Georgia, serif;
  --sans:      'IBM Plex Sans', 'IBM Plex Sans Thai Looped', system-ui, sans-serif;
  --mono:      'JetBrains Mono', ui-monospace, 'SFMono-Regular', Menlo, monospace;
}

*,
*::before,
*::after { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

html:lang(th) body { font-family: 'IBM Plex Sans Thai Looped', var(--sans); }

body.login-body {
  min-height: 100vh;
  display: grid;
  grid-template-rows: 1fr auto;
  position: relative;
  overflow-x: hidden;
}

/* ── Decorative motifs (parity with main site) ─────────────── */
.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image: radial-gradient(rgba(231, 226, 211, 0.05) 1px, transparent 1px);
  background-size: 24px 24px;
  mask-image: radial-gradient(ellipse at center, #000 50%, transparent 100%);
}
.bg-glow {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  filter: blur(80px); opacity: 0.5;
}
.bg-glow span {
  position: absolute; width: 400px; height: 400px; border-radius: 50%;
  animation: drift 18s ease-in-out infinite alternate;
}
.bg-glow span:nth-child(1) { top: -8%;  left: -10%; background: var(--coral-glow); }
.bg-glow span:nth-child(2) { bottom: 8%; right: -12%; background: rgba(95, 212, 255, 0.16); animation-delay: -6s; }
.bg-glow span:nth-child(3) { top: 40%; left: 50%; background: rgba(245, 196, 94, 0.12); animation-delay: -12s; }
@keyframes drift {
  to { transform: translate(40px, -30px) scale(1.1); }
}

/* ── Top-bar utility ────────────────────────────────────────── */
.back-link {
  position: fixed; top: 18px; left: 22px; z-index: 10;
  font: 500 13px/1 var(--mono);
  letter-spacing: 0.05em;
  color: var(--text-2);
  text-decoration: none;
  padding: 8px 12px;
  border: 1px solid var(--line-2);
  border-radius: 4px;
  background: rgba(11, 12, 16, 0.6);
  backdrop-filter: blur(8px);
  transition: color 120ms, border-color 120ms;
}
.back-link:hover { color: var(--coral); border-color: var(--coral); }
.back-link:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; }

.lang-toggle {
  position: fixed; top: 18px; right: 22px; z-index: 10;
  display: inline-flex; align-items: center;
  font: 500 13px/1 var(--mono);
  background: rgba(11, 12, 16, 0.6);
  border: 1px solid var(--line-2);
  border-radius: 4px;
  backdrop-filter: blur(8px);
}
.lang-toggle__btn {
  appearance: none;
  background: transparent;
  border: 0;
  color: var(--text-3);
  padding: 8px 10px;
  cursor: pointer;
  font: inherit;
  letter-spacing: 0.05em;
  transition: color 120ms;
}
.lang-toggle__btn[aria-pressed="true"] { color: var(--coral); }
.lang-toggle__btn:hover { color: var(--text); }
.lang-toggle__btn:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; }
.lang-toggle__sep { color: var(--mute); }

/* ── Card shell with coral corner brackets ─────────────────── */
.login-shell {
  position: relative;
  width: min(440px, calc(100vw - 32px));
  margin: auto;
  padding: 56px 40px 40px;
  background: linear-gradient(180deg, var(--bg-2), var(--bg));
  border: 1px solid var(--line-2);
  border-radius: 6px;
  z-index: 1;
}

@media (max-width: 480px) {
  .login-shell { padding: 48px 24px 32px; }
}

.bracket {
  position: absolute; width: 20px; height: 20px;
  border-color: var(--coral);
  border-style: solid;
}
.bracket--tl { top: -1px; left: -1px;     border-width: 2px 0 0 2px; }
.bracket--tr { top: -1px; right: -1px;    border-width: 2px 2px 0 0; }
.bracket--bl { bottom: -1px; left: -1px;  border-width: 0 0 2px 2px; }
.bracket--br { bottom: -1px; right: -1px; border-width: 0 2px 2px 0; }

/* ── Head: brand mark + section marker ─────────────────────── */
.login-head { display: grid; gap: 18px; margin-bottom: 22px; }
.login-mark {
  display: inline-flex; align-items: center; gap: 12px;
  text-decoration: none; color: var(--text);
  width: max-content;
}
.login-mark img { display: block; image-rendering: -webkit-optimize-contrast; }
.login-mark__brand {
  font: 700 18px/1 var(--display);
  letter-spacing: -0.01em;
}
.login-section {
  margin: 0;
  font: 500 11px/1 var(--mono);
  letter-spacing: 0.12em;
  color: var(--text-3);
  text-transform: uppercase;
}
.login-section .cursor {
  display: inline-block;
  width: 6px; height: 11px;
  margin-left: 4px;
  background: var(--coral);
  vertical-align: -1px;
  animation: blink 1s steps(2) infinite;
}
@keyframes blink { 50% { opacity: 0; } }

/* ── Title + lede ──────────────────────────────────────────── */
.login-title {
  margin: 0 0 14px;
  font: 600 38px/1.05 var(--display);
  letter-spacing: -0.01em;
  color: var(--text);
}
.login-title__em {
  font-family: var(--editorial);
  font-style: italic;
  font-weight: 400;
  color: var(--coral);
}
.login-lede {
  margin: 0 0 28px;
  color: var(--text-2);
  font-size: 15px;
  line-height: 1.55;
}

/* ── Status pill (idle, error, success) ───────────────────── */
.login-status {
  margin: -10px 0 18px;
  padding: 10px 12px;
  font: 500 13px/1.4 var(--mono);
  border-radius: 4px;
  border: 1px solid var(--line-2);
  background: var(--bg-3);
  color: var(--text-2);
}
.login-status[data-tone="error"]   { border-color: var(--coral);  color: var(--coral-2); }
.login-status[data-tone="info"]    { border-color: var(--cyan);   color: var(--cyan); }
.login-status[data-tone="success"] { border-color: var(--lime);   color: var(--lime); }

/* ── Buttons ───────────────────────────────────────────────── */
.login-actions {
  display: grid;
  gap: 12px;
  margin-bottom: 26px;
}
/* `display: grid` above wins over [hidden]'s UA `display: none`. Restore it. */
.login-actions[hidden] { display: none; }

.login-btn {
  appearance: none;
  display: inline-flex; align-items: center; justify-content: center; gap: 12px;
  width: 100%;
  padding: 14px 18px;
  font: 500 15px/1 var(--sans);
  letter-spacing: 0.005em;
  border-radius: 4px;
  border: 1px solid var(--line-2);
  background: var(--bg-3);
  color: var(--text);
  cursor: pointer;
  transition: transform 120ms, border-color 120ms, background 120ms;
}
html:lang(th) .login-btn { font-family: 'IBM Plex Sans Thai Looped', var(--sans); }

.login-btn:hover {
  transform: translateY(-1px);
  border-color: var(--line-3);
  background: var(--bg-2);
}
.login-btn:active { transform: translateY(0); }
.login-btn:focus-visible { outline: 2px solid var(--coral); outline-offset: 2px; }
.login-btn[disabled] { opacity: 0.5; pointer-events: none; }

.login-btn__icon { width: 20px; height: 20px; flex: 0 0 auto; }

.login-btn--google { /* default chrome already matches */ }
.login-btn--line   { /* LINE green is in the icon; chrome stays neutral */ }

/* ── Fine print ────────────────────────────────────────────── */
.login-fineprint {
  margin: 0;
  font: 400 12px/1.5 var(--mono);
  color: var(--text-3);
  letter-spacing: 0.02em;
}
.login-fineprint a {
  color: var(--text-2);
  text-decoration: underline;
  text-decoration-color: var(--line-3);
  text-underline-offset: 2px;
}
.login-fineprint a:hover { color: var(--coral); text-decoration-color: var(--coral); }

/* ── Foot ─────────────────────────────────────────────────── */
.login-foot {
  position: relative;
  z-index: 1;
  padding: 20px;
  text-align: center;
  font: 400 12px/1 var(--mono);
  color: var(--mute);
  letter-spacing: 0.06em;
}

/* ── Reduced-motion respect ───────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .bg-glow span { animation: none; }
  .login-section .cursor { animation: none; opacity: 1; }
  .login-btn { transition: none; }
}