/* Houston AI Workshop — shared styles
   Loaded by every public page (index, about, schedule, members). */

@import url("fonts/fonts.css");

:root {
  /* Ink + paper — warm, slightly toasted neutrals */
  --paper:        oklch(0.972 0.012 80);
  --paper-deep:   oklch(0.945 0.016 78);
  --paper-edge:   oklch(0.895 0.020 75);
  --ink:          oklch(0.205 0.020 60);
  --ink-2:        oklch(0.430 0.015 60);
  --ink-3:        oklch(0.620 0.012 60);
  --rule:         oklch(0.875 0.018 75);

  /* Accents */
  --ember:        oklch(0.560 0.158 255);  /* blue accent (was ember #c14a1c) */
  --ember-deep:   oklch(0.490 0.158 255);
  --ember-wash:   oklch(0.945 0.040 255);  /* tint for chip backgrounds */
  --moss:         oklch(0.470 0.080 145);  /* secondary, gardening nod */

  --shadow-soft:  0 1px 2px rgba(40,28,16,0.04), 0 8px 24px -12px rgba(40,28,16,0.08);
  --shadow-lift:  0 1px 2px rgba(40,28,16,0.05), 0 24px 60px -20px rgba(40,28,16,0.18);

  --serif: "Newsreader", "Source Serif Pro", Georgia, serif;
  --sans:  "Geist", "Inter Tight", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  --maxw: 68rem;
  --pad-x: clamp(1.25rem, 4vw, 3rem);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

/* The HTML5 `hidden` attribute should always win. Without this, class-based
   `display` rules (e.g. `.btn { display: inline-flex }`) outweigh the UA's
   `[hidden] { display: none }` and the attribute becomes a silent no-op. */
[hidden] { display: none !important; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--sans);
  font-weight: 400;
  color: var(--ink);
  background: var(--paper);
  min-height: 100vh;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle paper texture — a single SVG noise overlay, pinned, very low opacity */
body::before {
  content: "";
  position: fixed; inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.035;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='220' height='220'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.2 0 0 0 0 0.15 0 0 0 0 0.1 0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

body > * { position: relative; z-index: 1; }

a { color: var(--ember); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }

p { margin: 0 0 1rem; }
p.lead {
  font-family: var(--serif);
  font-size: clamp(1.25rem, 1.6vw, 1.5rem);
  font-weight: 400;
  line-height: 1.45;
  color: var(--ink);
  max-width: 36ch;
  margin: 0 0 1.75rem;
}

h1, h2, h3, h4 {
  font-family: var(--serif);
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0;
  text-wrap: balance;
}

/* ---- Header / nav ---- */
.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1.2rem var(--pad-x) 1rem;
  max-width: var(--maxw);
  margin: 0 auto;
}
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 0.55rem;
  color: var(--ink);
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  text-decoration: none;
}
.brand:hover { text-decoration: none; }
.brand .brand-mark {
  display: inline-block;
  width: 0.55rem; height: 0.55rem;
  background: var(--ember);
  border-radius: 999px;
  transform: translateY(-1px);
}

.nav {
  display: flex;
  align-items: center;
  gap: 0.25rem;
  flex: 1;
  justify-content: center;
}
.nav a {
  color: var(--ink-2);
  font-size: 0.9rem;
  font-weight: 400;
  padding: 0.4rem 0.85rem;
  border-radius: 999px;
  text-decoration: none;
  transition: color 120ms, background 120ms;
}
.nav a:hover { color: var(--ink); background: var(--paper-deep); text-decoration: none; }
.nav a.active { color: var(--ink); background: var(--paper-deep); }
.nav a[data-soon] {
  color: var(--ink-3);
}
.nav a[data-soon]::after {
  content: "·";
  display: inline-block;
  margin-left: 0.25rem;
  color: var(--ember);
}

.auth-slot {
  display: flex; align-items: center; gap: 0.6rem;
  min-height: 2.25rem;
}

/* ---- Buttons (shared) ---- */
.btn {
  font: inherit;
  font-family: var(--sans);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 0.55rem 1.05rem;
  border-radius: 999px;
  cursor: pointer;
  border: 1px solid var(--rule);
  background: var(--paper);
  color: var(--ink);
  text-decoration: none;
  display: inline-flex; align-items: center; gap: 0.5rem;
  transition: border-color 120ms, background 120ms, color 120ms, transform 80ms;
}
.btn:hover { border-color: var(--ink-2); text-decoration: none; }
.btn:active { transform: translateY(1px); }
.btn.primary {
  background: var(--ember);
  color: #fff;
  border-color: var(--ember);
}
.btn.primary:hover { background: var(--ember-deep); border-color: var(--ember-deep); color: #fff; }
.btn.ghost {
  background: transparent;
  border-color: transparent;
  color: var(--ink-2);
}
.btn.ghost:hover { color: var(--ink); background: var(--paper-deep); }

.btn .arrow { transition: transform 120ms; }
.btn:hover .arrow { transform: translateX(2px); }

/* User pill in header */
.user-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.3rem 0.75rem 0.3rem 0.3rem;
  border-radius: 999px;
  background: var(--paper-deep);
  border: 1px solid var(--rule);
  font-size: 0.85rem;
}
.user-pill img, .user-pill .avatar-fallback {
  width: 1.5rem; height: 1.5rem;
  border-radius: 999px;
  background: var(--ember);
  color: #fff;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 0.75rem; font-weight: 600;
}
.user-pill .email { color: var(--ink-2); max-width: 14ch; overflow:hidden; text-overflow:ellipsis; white-space:nowrap; }

/* ---- Layout primitives ---- */
.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 var(--pad-x);
}
.wrap-narrow {
  max-width: 44rem;
  margin: 0 auto;
  padding: 0 var(--pad-x);
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ember);
}
.eyebrow .dot { color: var(--ink-3); margin: 0 0.4em; }

.rule {
  border: 0;
  border-top: 1px solid var(--rule);
  margin: 0;
}

/* Footer */
.site-footer {
  border-top: 1px solid var(--rule);
  margin-top: 6rem;
  padding: 2.5rem var(--pad-x) 3rem;
}
.site-footer .wrap {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: end;
  padding: 0;
}
.site-footer .colophon {
  font-family: var(--mono);
  font-size: 0.78rem;
  color: var(--ink-3);
  letter-spacing: 0.04em;
}
.site-footer a { color: var(--ink-2); }
.site-footer a:hover { color: var(--ink); }

/* Toast */
.toast {
  position: fixed; top: 1rem; left: 50%;
  transform: translateX(-50%);
  padding: 0.6rem 1rem;
  border-radius: 999px;
  font-size: 0.88rem;
  background: var(--ink);
  color: #fff;
  box-shadow: var(--shadow-lift);
  z-index: 1000;
}
.toast.success { background: var(--moss); }
.toast.error { background: var(--ember-deep); }

/* ---- Auth modal (visually refreshed — same DOM ids/behaviour) ---- */
dialog.auth-modal {
  border: 1px solid var(--rule);
  border-radius: 1.25rem;
  padding: 0;
  max-width: 24rem;
  width: calc(100% - 2rem);
  background: var(--paper);
  color: var(--ink);
  box-shadow: var(--shadow-lift);
}
dialog.auth-modal::backdrop { background: rgba(30, 20, 10, 0.42); backdrop-filter: blur(2px); }
.modal-inner { padding: 1.75rem 1.6rem 1.5rem; position: relative; }
.modal-close {
  position: absolute; top: 0.6rem; right: 0.6rem;
  background: transparent; border: 0;
  font-size: 1.4rem; line-height: 1;
  color: var(--ink-3);
  cursor: pointer;
  padding: 0.25rem 0.5rem; border-radius: 0.5rem;
}
.modal-close:hover { background: var(--paper-deep); color: var(--ink); }
.modal-title {
  font-family: var(--serif);
  font-size: 1.45rem;
  font-weight: 500;
  margin: 0 0 0.25rem;
  letter-spacing: -0.01em;
}
.modal-sub {
  font-size: 0.88rem;
  color: var(--ink-2);
  margin: 0 0 1.1rem;
}

.oauth-buttons { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 0.9rem; }
.oauth-btn {
  display: flex; align-items: center; justify-content: center; gap: 0.6rem;
  padding: 0.65rem 1rem;
  border: 1px solid var(--rule);
  background: var(--paper);
  border-radius: 0.75rem;
  font: inherit;
  font-family: var(--sans);
  font-size: 0.92rem;
  cursor: pointer;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 120ms, background 120ms;
}
.oauth-btn:hover { border-color: var(--ink-2); background: var(--paper-deep); text-decoration: none; }
.oauth-btn svg { width: 1.05rem; height: 1.05rem; }

.divider {
  display: flex; align-items: center; gap: 0.6rem;
  color: var(--ink-3);
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0.75rem 0;
}
.divider::before, .divider::after { content: ""; flex: 1; height: 1px; background: var(--rule); }

form.auth-form { display: flex; flex-direction: column; gap: 0.55rem; }
.auth-form label {
  font-family: var(--mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-3);
  margin-bottom: 0.2rem;
  display: block;
}
.auth-form input {
  font: inherit;
  font-family: var(--sans);
  padding: 0.6rem 0.85rem;
  border: 1px solid var(--rule);
  border-radius: 0.6rem;
  background: var(--paper);
  width: 100%;
}
.auth-form input:focus {
  outline: 2px solid var(--ember);
  outline-offset: -1px;
  border-color: var(--ember);
}
.form-error {
  color: var(--ember-deep);
  font-size: 0.85rem;
  margin: 0.25rem 0 0;
  min-height: 1.2em;
}
.auth-form .btn.primary { justify-content: center; padding: 0.7rem; margin-top: 0.5rem; }
.form-toggle {
  margin-top: 0.85rem;
  font-size: 0.85rem;
  text-align: center;
  color: var(--ink-2);
}
.form-toggle button {
  background: transparent; border: 0;
  color: var(--ember); cursor: pointer; font: inherit; padding: 0;
}
.form-toggle button:hover { text-decoration: underline; text-underline-offset: 3px; }

/* Mobile nav adjustments */
@media (max-width: 640px) {
  .site-header { flex-wrap: wrap; row-gap: 0.5rem; }
  .nav { order: 3; width: 100%; justify-content: flex-start; flex-wrap: wrap; }
  .nav a { padding: 0.35rem 0.6rem; font-size: 0.85rem; }
  .auth-slot { margin-left: auto; }
}