/* What's the Code? — single stylesheet */

:root {
  --ink: #1a1a2e;
  --ink-soft: #3a3a52;
  --bg: #fef9f1;          /* warm cream */
  --panel: #ffffff;
  --border: #ede4d3;
  --muted: #6b7080;

  /* Brand palette — used across callouts, the brand mark, and
     game accents. Pick by intent, not by name. */
  --blue: #4361ee;
  --blue-soft: #dbeafe;
  --green: #10b981;
  --green-soft: #d1fae5;
  --amber: #f59e0b;
  --amber-soft: #fef3c7;
  --pink: #ec4899;
  --pink-soft: #fce7f3;
  --purple: #a855f7;
  --purple-soft: #f3e8ff;
  --teal: #14b8a6;
  --teal-soft: #ccfbf1;

  /* Aliases */
  --accent: var(--blue);
  --accent-soft: var(--blue-soft);
  --warn: var(--amber);
  --grey: #94a3b8;
  --error: #ef4444;
  --error-soft: #fee2e2;
  --focus: #fbbf24;

  --radius: 8px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(26, 26, 46, .06);
  --shadow: 0 6px 20px rgba(26, 26, 46, .08);

  --font-sans: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: ui-rounded, "SF Pro Rounded", system-ui, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;

  --max-width: 880px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f1ecdf;
    --ink-soft: #c5bfb0;
    --bg: #181625;
    --panel: #221f33;
    --border: #36324a;
    --muted: #8a8499;

    --blue: #6e88ff;
    --blue-soft: #2a3260;
    --green: #34d399;
    --green-soft: #1f3d31;
    --amber: #fbbf24;
    --amber-soft: #4d3a14;
    --pink: #f472b6;
    --pink-soft: #4a2238;
    --purple: #c084fc;
    --purple-soft: #3a2853;
    --teal: #2dd4bf;
    --teal-soft: #1c3e3a;

    --grey: #4a4a60;
    --error: #f87171;
    --error-soft: #4a1f1f;
    --focus: #fde047;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);
    --shadow: 0 6px 20px rgba(0, 0, 0, .35);
  }
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--ink); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
a:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; }

button { font: inherit; cursor: pointer; }
button:focus-visible, [type="text"]:focus-visible, [type="number"]:focus-visible, [type="date"]:focus-visible, select:focus-visible, textarea:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
}

img { max-width: 100%; height: auto; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--ink);
  color: var(--bg);
  padding: 8px 12px;
  z-index: 100;
}
.skip-link:focus { top: 0; }

.visually-hidden {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0);
  white-space: nowrap; border: 0;
}

[hidden] { display: none !important; }

/* Header / nav / footer ----------------------------------------- */

.site-header {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 18px 20px;
  flex-wrap: wrap;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--ink);
}
.brand-mark { flex-shrink: 0; }
.brand-word {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
}
.brand-tagline {
  margin: 0;
  color: var(--muted);
  font-size: .95rem;
}

.site-nav {
  border-bottom: 1px solid var(--border);
  background: var(--panel);
}
.site-nav .container { padding-top: 0; padding-bottom: 0; }
.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}
.nav-list a {
  display: inline-block;
  padding: 12px 14px;
  text-decoration: none;
  color: var(--ink-soft);
  font-weight: 500;
  border-bottom: 3px solid transparent;
}
.nav-list a:hover { color: var(--ink); }
.nav-list a.active {
  color: var(--ink);
  border-bottom-color: var(--accent);
}
.nav-toggle, .nav-toggle-label { display: none; }

@media (max-width: 640px) {
  .nav-toggle-label {
    display: block;
    padding: 10px 0;
    font-weight: 500;
    cursor: pointer;
    user-select: none;
  }
  .nav-toggle-label::before { content: "☰  "; }
  .nav-list { display: none; flex-direction: column; gap: 0; padding-bottom: 8px; }
  .nav-toggle:checked + .nav-toggle-label + .nav-list { display: flex; }
}

.site-footer {
  margin-top: 64px;
  padding: 28px 0;
  border-top: 1px solid var(--border);
  background: var(--panel);
  color: var(--muted);
  font-size: .95rem;
}
.footer-inner { display: grid; gap: 10px; }
.footer-links {
  list-style: none;
  margin: 0; padding: 0;
  display: flex; flex-wrap: wrap;
  gap: 14px;
}
.footer-copyright { margin: 0; }

/* Page chrome ---------------------------------------------------- */

.page-header { padding: 32px 0 12px; }
.page-header h1 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  letter-spacing: -0.025em;
  line-height: 1.1;
}
.lead { color: var(--ink-soft); font-size: 1.05rem; margin: 0; }

.prose { padding-bottom: 24px; }
.prose h2 { margin-top: 32px; }
.prose ul { padding-left: 22px; }
.prose .muted { color: var(--muted); }

.eyebrow {
  text-transform: uppercase;
  letter-spacing: .14em;
  font-size: .75rem;
  font-weight: 700;
  color: var(--purple);
  margin: 0 0 10px;
}

.btn-primary, .btn-secondary {
  display: inline-block;
  padding: 11px 20px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background 140ms, border-color 140ms, transform 80ms;
  letter-spacing: -0.005em;
}
.btn-primary { background: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--blue); }
.btn-primary:active { transform: scale(0.98); }
.btn-secondary { background: var(--panel); color: var(--ink); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--ink); background: var(--bg); }

.form-error { color: var(--error); font-weight: 500; margin-top: 12px; }

/* Home / hero ---------------------------------------------------- */

.hero { padding: 32px 0 16px; }
.hero-title {
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 5vw, 2.8rem);
  margin: 0 0 12px;
  letter-spacing: -0.025em;
  line-height: 1.1;
}
.hero-lead { color: var(--ink-soft); margin: 0; max-width: 60ch; font-size: 1.05rem; }

.callouts {
  display: grid;
  gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  margin-top: 48px;
}
.callout {
  display: block;
  padding: 20px 22px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  text-decoration: none;
  color: var(--ink);
  box-shadow: var(--shadow-sm);
  transition: transform 160ms ease, box-shadow 160ms ease;
}
.callout:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.callout h3 {
  margin: 0 0 6px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}
.callout p { margin: 0; color: var(--ink-soft); font-size: .95rem; }

/* Colourful callout rotation — keeps the home page feeling like a
   bright daily-puzzle site rather than a serious dossier. */
.callout:nth-child(4n+1) {
  background: var(--purple-soft);
  border-color: transparent;
}
.callout:nth-child(4n+1) h3 { color: var(--purple); }
.callout:nth-child(4n+2) {
  background: var(--teal-soft);
  border-color: transparent;
}
.callout:nth-child(4n+2) h3 { color: var(--teal); }
.callout:nth-child(4n+3) {
  background: var(--amber-soft);
  border-color: transparent;
}
.callout:nth-child(4n+3) h3 { color: var(--amber); }
.callout:nth-child(4n) {
  background: var(--pink-soft);
  border-color: transparent;
}
.callout:nth-child(4n) h3 { color: var(--pink); }

/* Wordle game ---------------------------------------------------- */

.game { margin: 32px 0; display: grid; gap: 20px; justify-items: center; }
.wordle-board {
  display: grid;
  grid-template-rows: repeat(6, 1fr);
  gap: 6px;
}
.wordle-row { display: grid; grid-template-columns: repeat(5, 1fr); gap: 6px; }
.wordle-tile {
  width: 56px; height: 56px;
  display: grid;
  place-items: center;
  font-family: var(--font-mono);
  font-size: 1.6rem;
  font-weight: 700;
  text-transform: uppercase;
  background: var(--panel);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  transition: background 200ms, border-color 200ms, transform 120ms;
}
.wordle-tile.filled { border-color: var(--ink-soft); transform: scale(1.02); }
.wordle-tile.correct { background: var(--green); border-color: var(--green); color: white; }
.wordle-tile.present { background: var(--amber); border-color: var(--amber); color: white; }
.wordle-tile.absent { background: var(--grey); border-color: var(--grey); color: white; }

.wordle-keyboard {
  display: grid;
  gap: 6px;
  width: 100%;
  max-width: 520px;
}
.wordle-keyboard-row { display: flex; gap: 6px; justify-content: center; }
.wordle-key {
  flex: 1 1 0;
  min-width: 28px;
  padding: 14px 0;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--panel);
  color: var(--ink);
  font-weight: 600;
  text-transform: uppercase;
}
.wordle-key.wide { flex: 1.6 0 0; }
.wordle-key.correct { background: var(--green); border-color: var(--green); color: white; }
.wordle-key.present { background: var(--amber); border-color: var(--amber); color: white; }
.wordle-key.absent { background: var(--grey); border-color: var(--grey); color: white; }

.wordle-status { min-height: 1.4em; color: var(--ink-soft); }

@media (max-width: 480px) {
  .wordle-tile { width: 48px; height: 48px; font-size: 1.4rem; }
  .wordle-key { padding: 12px 0; font-size: .9rem; }
}

/* Archive -------------------------------------------------------- */

.archive-page { padding-bottom: 32px; }
.archive-month {
  margin: 40px 0 14px;
  font-family: var(--font-display);
  font-size: 1.3rem;
  letter-spacing: -0.02em;
  color: var(--purple);
  border-bottom: 2px solid var(--purple-soft);
  padding-bottom: 10px;
}
.archive-stream > h2:nth-of-type(6n+2) { color: var(--blue); border-bottom-color: var(--blue-soft); }
.archive-stream > h2:nth-of-type(6n+3) { color: var(--green); border-bottom-color: var(--green-soft); }
.archive-stream > h2:nth-of-type(6n+4) { color: var(--amber); border-bottom-color: var(--amber-soft); }
.archive-stream > h2:nth-of-type(6n+5) { color: var(--pink); border-bottom-color: var(--pink-soft); }
.archive-stream > h2:nth-of-type(6n)   { color: var(--teal); border-bottom-color: var(--teal-soft); }
.archive-table {
  width: 100%;
  border-collapse: collapse;
  font-size: .95rem;
}
.archive-table th {
  text-align: left;
  font-weight: 600;
  font-size: .8rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.archive-table td {
  padding: 10px;
  border-bottom: 1px solid var(--border);
  vertical-align: top;
}
.archive-table tr:hover td { background: var(--accent-soft); }
.archive-date {
  font-family: var(--font-mono);
  color: var(--ink-soft);
  white-space: nowrap;
}
.archive-day { color: var(--muted); white-space: nowrap; }
.archive-wordle {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--green);
}
.archive-crypto {
  color: var(--ink);
  font-style: italic;
  max-width: 38ch;
}
.archive-diff {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: .75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}
.archive-diff-easy { background: var(--green-soft); color: var(--green); }
.archive-diff-medium { background: var(--amber-soft); color: var(--amber); }
.archive-diff-hard { background: var(--error-soft); color: var(--error); }
.archive-footer { margin-top: 20px; color: var(--muted); font-size: .9rem; }

@media (max-width: 640px) {
  .archive-table thead { display: none; }
  .archive-table tr {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 4px 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
  }
  .archive-table td {
    padding: 0;
    border: 0;
  }
  .archive-date { grid-column: 1; font-size: .85rem; }
  .archive-day { grid-column: 2; font-size: .85rem; text-align: right; }
  .archive-wordle { grid-column: 1 / -1; font-size: 1rem; }
  .archive-crypto { grid-column: 1 / -1; font-size: .9rem; }
  .archive-diff { grid-column: 1 / -1; justify-self: start; }
}

/* Cryptogram ----------------------------------------------------- */

.cryptogram { margin: 28px 0 12px; display: grid; gap: 18px; }
.crypto-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 18px 22px;
  padding: 24px 18px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  font-family: var(--font-mono);
}
.crypto-word {
  display: flex;
  gap: 4px;
}
.crypto-cell {
  display: grid;
  grid-template-rows: 1fr auto;
  align-items: center;
  justify-items: center;
  min-width: 24px;
}
.crypto-cell.punct { min-width: 12px; }
.crypto-guess {
  width: 28px;
  height: 36px;
  background: transparent;
  border: 0;
  border-bottom: 2px solid var(--border);
  font: inherit;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--ink);
  text-transform: uppercase;
  cursor: pointer;
  padding: 0;
  text-align: center;
}
.crypto-guess.active {
  border-bottom-color: var(--purple);
  background: var(--purple-soft);
}
.crypto-guess.hinted { color: var(--purple); }
.crypto-cipher {
  font-size: .8rem;
  color: var(--muted);
  letter-spacing: .05em;
  margin-top: 2px;
}
.crypto-punct {
  font-size: 1.15rem;
  color: var(--muted);
  align-self: center;
  padding-bottom: 18px;
}
.crypto-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}
.crypto-status { color: var(--muted); }
.crypto-status.won { color: var(--green); font-weight: 600; }

@media (max-width: 480px) {
  .crypto-grid { gap: 12px 16px; padding: 16px 12px; }
  .crypto-guess { width: 22px; height: 30px; font-size: 1rem; }
  .crypto-cipher { font-size: .7rem; }
}

/* Search forms --------------------------------------------------- */

.search-form {
  display: grid;
  gap: 16px;
  background: var(--panel);
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}
.search-form fieldset {
  border: 0;
  padding: 0;
  margin: 0;
  display: grid;
  gap: 12px;
}
.search-form legend {
  font-weight: 600;
  font-size: .95rem;
  margin-bottom: 8px;
}
.fieldset-note {
  font-size: .9rem;
  color: var(--muted);
  margin: 0 0 4px;
}
.field { display: grid; gap: 4px; }
.field-label {
  font-size: .85rem;
  color: var(--muted);
  font-weight: 500;
}
input[type="text"], input[type="number"], input[type="date"], select, textarea {
  font: inherit;
  padding: 10px 12px;
  background: var(--bg);
  color: var(--ink);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* Privacy input — blurs when not focused so a shoulder-surfer at
   a normal viewing distance can't read what was typed, but the
   person typing can read it whenever they focus the field. */
.privacy-input {
  filter: blur(3px);
  transition: filter 120ms ease;
  font-family: var(--font-mono);
  letter-spacing: .02em;
}
.privacy-input:focus,
.privacy-input:hover {
  filter: blur(0);
}
.search-form .actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

@media (min-width: 640px) {
  .search-form fieldset { grid-template-columns: 1fr 1fr; gap: 16px; }
  .search-form fieldset legend { grid-column: 1 / -1; }
  .search-form fieldset .fieldset-note { grid-column: 1 / -1; }
}

/* Messaging ------------------------------------------------------ */

.messaging {
  padding: 24px 20px 80px;
  min-height: 75vh;
  display: grid;
  align-content: start;
}
.messaging-header {
  position: sticky;
  top: 0;
  background: var(--bg);
  padding: 16px 0 12px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 12px;
  border-bottom: 1px solid var(--border);
  z-index: 5;
}
.messaging-header h1 { margin: 0; font-size: 1.4rem; }
.messaging-header .eyebrow { grid-column: 1 / -1; margin-bottom: 0; }
.quick-exit {
  background: var(--error);
  color: white;
  border: 0;
  padding: 10px 16px;
  border-radius: var(--radius);
  font-weight: 700;
  letter-spacing: .04em;
}
.quick-exit:hover { filter: brightness(1.05); }

.messaging-thread {
  padding: 20px 0;
}
.message-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 10px;
}
.message {
  max-width: 80%;
  padding: 10px 14px;
  border-radius: 16px;
  background: var(--panel);
  border: 1px solid var(--border);
  white-space: pre-wrap;
  word-wrap: break-word;
}
.message.outgoing {
  justify-self: end;
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}
.message-meta {
  display: block;
  margin-top: 4px;
  font-size: .75rem;
  color: var(--muted);
}

.messaging-empty {
  padding: 40px 0;
  color: var(--muted);
}

.message-form {
  position: sticky;
  bottom: 0;
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding: 12px 0;
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
  align-items: end;
}
.message-form {
  grid-template-columns: 1fr;
}
.message-form textarea {
  resize: vertical;
  min-height: 56px;
}
.message-form-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}

.attach-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--panel);
  cursor: pointer;
  font-size: 1.2rem;
}
.attach-button:hover { border-color: var(--ink); }
.attach-button:focus-within { outline: 3px solid var(--focus); outline-offset: 2px; }

.attachment-preview {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.pending-attachment {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 100%;
}
.pending-attachment img {
  width: 40px;
  height: 40px;
  object-fit: cover;
  border-radius: 4px;
  flex-shrink: 0;
}
.pending-attachment .attachment-meta {
  font-size: .9rem;
  color: var(--ink-soft);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  max-width: 240px;
}
.pending-remove {
  background: transparent;
  border: 0;
  font-size: 1.4rem;
  line-height: 1;
  color: var(--muted);
  cursor: pointer;
  padding: 0 4px;
}
.pending-remove:hover { color: var(--error); }

.attachment {
  margin-top: 8px;
}
.attachment-thumb {
  display: block;
  padding: 0;
  background: transparent;
  border: 0;
  cursor: pointer;
  border-radius: var(--radius);
  overflow: hidden;
}
.attachment-thumb img {
  display: block;
  max-width: 220px;
  max-height: 220px;
  width: auto;
  height: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.attachment-doc {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  text-align: left;
  max-width: 100%;
}
.attachment-doc:hover { border-color: var(--ink); }
.attachment-icon { font-size: 1.4rem; }
.attachment-meta { font-size: .9rem; color: var(--ink-soft); }

/* Lightbox ------------------------------------------------------- */

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 50;
  background: rgba(8, 10, 14, .9);
  display: grid;
  place-items: center;
  padding: 24px;
}
.lightbox-img {
  max-width: 100%;
  max-height: 90vh;
  width: auto;
  height: auto;
  border-radius: var(--radius);
}
.lightbox-frame {
  width: min(95vw, 1000px);
  height: min(90vh, 1200px);
  border: 0;
  background: var(--panel);
  border-radius: var(--radius);
}
.lightbox-close {
  position: absolute;
  top: 12px;
  right: 16px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .15);
  color: white;
  border: 0;
  font-size: 1.6rem;
  line-height: 1;
  cursor: pointer;
}
.lightbox-close:hover { background: rgba(255, 255, 255, .25); }

@media (max-width: 480px) {
  .message { max-width: 92%; }
  .attachment-thumb img { max-width: 180px; max-height: 180px; }
}