/* Disposable Temp Mail · swiss-archival (International Style) · table-detail
 * Warm linen canvas, coffee ink, burgundy accent. Museum-label micro layer.
 * Every color and font references a token. Overlays only for shadows.
 */

:root {
  --color-paper: oklch(94.5% 0.015 85);
  --color-surface: oklch(92% 0.016 85);
  --color-ink: oklch(32% 0.02 60);
  --color-ink-2: oklch(48% 0.025 70);
  --color-accent: oklch(45% 0.14 25);
  --color-accent-hover: oklch(41% 0.14 25);
  --color-accent-active: oklch(35% 0.13 25);
  --color-border: oklch(83% 0.02 85);
  --color-focus: oklch(45% 0.2 25);
  --color-danger: oklch(45% 0.14 25);
  --color-danger-soft: oklch(90% 0.03 40);
  --color-success: oklch(50% 0.1 150);
  --color-success-soft: oklch(89% 0.04 150);

  --font-display: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-mono: ui-monospace, "SF Mono", "Cascadia Mono", Menlo, Consolas, monospace;

  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;

  --text-micro: 0.625rem;
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-h3: 1.25rem;
  --text-h2: 1.5rem;
  --text-display: clamp(2.25rem, 5vw, 3.5rem);

  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --ease-state: cubic-bezier(0.65, 0, 0.35, 1);
  --dur-fast: 150ms;
  --dur-base: 225ms;

  --radius-sm: 4px;
  --radius-md: 6px;

  --rule: 1px solid var(--color-border);
  --rule-strong: 2px solid var(--color-ink);

  color-scheme: light;
}

/* Dark plate is opt-in only ([data-theme="dark"]). Light linen is the default. */
:root[data-theme="dark"] {
    --color-paper: oklch(24% 0.015 60);
    --color-surface: oklch(28% 0.018 60);
    --color-ink: oklch(93% 0.015 85);
    --color-ink-2: oklch(76% 0.02 80);
    --color-accent: oklch(62% 0.15 25);
    --color-accent-hover: oklch(67% 0.15 25);
    --color-accent-active: oklch(72% 0.14 25);
    --color-border: oklch(38% 0.02 60);
    --color-focus: oklch(65% 0.2 25);
    --color-danger-soft: oklch(32% 0.05 25);
  --color-success-soft: oklch(30% 0.06 150);

  color-scheme: dark;
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  overflow-x: clip;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
}

/* Archival tactility: grain + blueprint grid, fixed behind content. */
.defs { position: absolute; width: 0; height: 0; overflow: hidden; }

.paper-grain {
  position: fixed;
  inset: 0;
  z-index: 50;
  pointer-events: none;
  opacity: 0.04;
  filter: url(#grain);
}

.blueprint-grid {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background-image: repeating-linear-gradient(
    to right,
    transparent 0,
    transparent calc(8.333% - 1px),
    color-mix(in srgb, var(--color-border) 55%, transparent) calc(8.333% - 1px),
    color-mix(in srgb, var(--color-border) 55%, transparent) 8.333%
  );
}

/* Museum-label micro layer: metadata, nav, stamps. */
.micro {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-2);
  margin: 0;
}

.skip-link {
  position: absolute;
  left: var(--space-4);
  top: -48px;
  z-index: 100;
  background: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-sm);
  transition: top var(--dur-fast) var(--ease-out);
}

.skip-link:focus { top: var(--space-2); }

.page {
  max-width: 80rem;
  margin: 0 auto;
  padding: var(--space-6) var(--space-4) var(--space-12);
}

/* ---------- Masthead ---------- */

.masthead {
  border-top: var(--rule-strong);
  padding-top: var(--space-3);
  margin-bottom: var(--space-8);
}

.masthead-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-3);
  border-bottom: var(--rule);
}

.session-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-2);
}

.session-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--color-ink-2);
}

.session-badge.is-ready .session-dot { background: var(--color-success); }
.session-badge.is-error .session-dot { background: var(--color-danger); }

.masthead-title {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-1);
  padding: var(--space-6) 0 var(--space-2);
}

.masthead-title h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: var(--text-display);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.05;
  text-wrap: balance;
  overflow-wrap: anywhere;
}

.lede {
  margin: 0;
  font-size: var(--text-h3);
  font-weight: 400;
  color: var(--color-ink-2);
  max-width: 44ch;
}

.masthead-meta { padding-top: var(--space-2); }

/* ---------- 12-column layout ---------- */

.layout {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: var(--space-6);
  align-items: start;
}

.rail {
  grid-column: span 4;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  min-width: 0;
}

.reader { grid-column: span 8; min-width: 0; }

.plate {
  background: var(--color-surface);
  border: var(--rule);
  border-radius: var(--radius-md);
  padding: var(--space-6);
}

.plate-head {
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  padding-bottom: var(--space-3);
  border-bottom: var(--rule-strong);
  margin-bottom: var(--space-4);
}

.plate-head h2 {
  margin: 0;
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.count-pill {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  border: var(--rule);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  color: var(--color-ink-2);
}

/* ---------- Composer ---------- */

.composer { display: flex; flex-direction: column; gap: var(--space-2); }

/* Second form in the same plate (transfer-code linker) sits below a hairline. */
.plate .composer + .composer {
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: var(--rule);
}

.field-label {
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-2);
}

.composer input[type="text"],
.composer select {
  width: 100%;
  font: inherit;
  font-size: var(--text-sm);
  color: var(--color-ink);
  background: var(--color-paper);
  border: var(--rule);
  border-radius: var(--radius-sm);
  padding: 10px var(--space-3);
  min-height: 44px;
}

.composer input:focus-visible,
.composer select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 1px;
  border-color: var(--color-focus);
}

.field-hint {
  margin: 0;
  font-size: var(--text-xs);
  color: var(--color-ink-2);
}

.composer-actions {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-2);
}

/* ---------- Buttons: 8 states ---------- */

.btn {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  min-height: 44px;
  padding: 10px var(--space-4);
  border: 1px solid var(--color-ink);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--color-ink);
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-state), color var(--dur-fast) var(--ease-state), border-color var(--dur-fast) var(--ease-state), opacity var(--dur-fast) var(--ease-state);
}

.btn:hover { background: color-mix(in srgb, var(--color-ink) 8%, transparent); }
.btn:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

.btn-primary { background: var(--color-accent); border-color: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-hover); border-color: var(--color-accent-hover); }
.btn-primary:active { background: var(--color-accent-active); border-color: var(--color-accent-active); }

.btn-secondary:hover { border-color: var(--color-accent); color: var(--color-accent); }

.btn-ghost { border-color: var(--color-border); }
.btn-ghost:hover { border-color: var(--color-ink); background: transparent; }

.btn-danger,
.btn-danger-ghost { color: var(--color-danger); }
.btn-danger { background: var(--color-danger); border-color: var(--color-danger); color: #fff; }
.btn-danger:hover { background: var(--color-accent-active); border-color: var(--color-accent-active); }
.btn-danger-ghost { border-color: var(--color-border); }
.btn-danger-ghost:hover { border-color: var(--color-danger); background: var(--color-danger-soft); }

.btn.is-loading { opacity: 0.6; cursor: progress; }

/* Theme toggle: small archival stamp in the masthead. */
.masthead-actions { display: inline-flex; align-items: center; gap: var(--space-3); }
.theme-toggle { min-height: 32px; padding: 6px var(--space-3); }
.btn.is-success { border-color: var(--color-success); color: var(--color-success); }
.btn.is-error { border-color: var(--color-danger); color: var(--color-danger); }

/* ---------- Register (inbox ledger) ---------- */

.inbox-list {
  list-style: none;
  margin: 0 0 var(--space-3);
  padding: 0;
  counter-reset: entry;
  border-top: var(--rule);
}

.inbox-list > li { border-bottom: var(--rule); }

.inbox-empty {
  padding: var(--space-4) 0;
  font-size: var(--text-sm);
  color: var(--color-ink-2);
}

.inbox-option {
  counter-increment: entry;
  display: flex;
  align-items: baseline;
  gap: var(--space-3);
  width: 100%;
  padding: var(--space-3) var(--space-2);
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-state), border-color var(--dur-fast) var(--ease-state);
}

.inbox-option::before {
  content: counter(entry, decimal-leading-zero);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-ink-2);
  flex-shrink: 0;
}

.inbox-option:hover { background: color-mix(in srgb, var(--color-ink) 5%, transparent); }
.inbox-option:focus-visible { outline: 2px solid var(--color-focus); outline-offset: -2px; }
.inbox-option[aria-selected="true"] {
  border-left-color: var(--color-accent);
  background: color-mix(in srgb, var(--color-accent) 7%, transparent);
}

.inbox-option .address {
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  overflow-wrap: anywhere;
}

/* ---------- Reading room ---------- */

.reader-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-4);
  flex-wrap: wrap;
  padding-bottom: var(--space-4);
  border-bottom: var(--rule);
  margin-bottom: 0;
}

.reader-address {
  margin: var(--space-1) 0;
  font-family: var(--font-mono);
  font-size: var(--text-h3);
  font-weight: 700;
  letter-spacing: -0.01em;
  overflow-wrap: anywhere;
}

.message-count {
  margin: 0;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-2);
}

.transfer-hint { margin-top: var(--space-2); }

.qr-figure { margin: var(--space-4) auto; max-width: 240px; }
.qr-figure svg { display: block; width: 100%; height: auto; border: 1px solid var(--color-line); }
.transfer-code {
  font-family: var(--font-mono);
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--color-ink);
}

/* Retention row: expiry line + plan picker under the reader title. */
.retention-row {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-2);
}

.retention-hint { margin: 0; flex: 1 1 auto; }

.retention-row .micro { margin: 0; }

.plan-select {
  font: inherit;
  font-size: var(--text-xs);
  color: var(--color-ink);
  background: var(--color-paper);
  border: var(--rule);
  border-radius: var(--radius-sm);
  padding: 6px var(--space-2);
  min-height: 36px;
}

.plan-select:focus-visible {
  outline: 2px solid var(--color-focus);
  outline-offset: 1px;
  border-color: var(--color-focus);
}

.reader-actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }

.ledger-head {
  display: grid;
  grid-template-columns: 3rem 1.2fr 1.6fr 1fr;
  gap: var(--space-3);
  padding: var(--space-2);
  border-bottom: var(--rule-strong);
  font-family: var(--font-mono);
  font-size: var(--text-micro);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-ink-2);
}

.message-list { display: flex; flex-direction: column; }

.message-row { border-bottom: var(--rule); }

.message-summary {
  display: grid;
  grid-template-columns: 3rem 1.2fr 1.6fr 1fr;
  gap: var(--space-3);
  align-items: baseline;
  width: 100%;
  padding: var(--space-3) var(--space-2);
  background: transparent;
  border: 0;
  border-left: 3px solid transparent;
  font: inherit;
  text-align: left;
  cursor: pointer;
  transition: background var(--dur-fast) var(--ease-state), border-color var(--dur-fast) var(--ease-state);
}

.message-summary:hover { background: color-mix(in srgb, var(--color-ink) 5%, transparent); }
.message-summary:focus-visible { outline: 2px solid var(--color-focus); outline-offset: -2px; }
.message-row.is-open .message-summary { border-left-color: var(--color-accent); }

.message-no {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-ink-2);
}

.message-from,
.message-when {
  font-size: var(--text-sm);
  overflow-wrap: anywhere;
}

.message-when {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-2);
}

.message-subject {
  margin: 0;
  font-size: var(--text-sm);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.message-body {
  padding: 0 var(--space-2) var(--space-4) calc(3rem + var(--space-4));
  font-size: var(--text-sm);
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  border-left: 3px solid var(--color-accent);
  margin-left: 0;
}

.message-text { margin: 0; white-space: pre-wrap; overflow-wrap: anywhere; }
.view-toggle { display: flex; gap: var(--space-2); margin-bottom: var(--space-3); }
.view-toggle .btn.is-active { border-color: var(--color-ink); background: var(--color-ink); color: var(--color-paper); }
.rich-frame { width: 100%; min-height: 24rem; border: 1px solid var(--color-border); border-radius: var(--radius); background: #fff; }
.attachment-list { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: center; margin-top: var(--space-3); }
.attachment-label { font-size: var(--text-sm); text-transform: uppercase; letter-spacing: 0.08em; color: var(--color-muted); }
.message-actions { display: flex; justify-content: flex-end; margin-top: var(--space-3); }

.empty-state { padding: var(--space-12) var(--space-4); text-align: left; }
.empty-state h3 {
  margin: var(--space-3) 0 var(--space-1);
  font-size: var(--text-h3);
  letter-spacing: -0.01em;
}
.empty-state p { margin: 0; color: var(--color-ink-2); font-size: var(--text-sm); max-width: 52ch; }
.empty-state svg { color: var(--color-ink-2); }

.loading-row {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  padding: var(--space-6) var(--space-2);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--color-ink-2);
}

.spinner {
  width: 14px;
  height: 14px;
  border: 2px solid var(--color-border);
  border-top-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- Dialog + toasts (overlays: shadows allowed) ---------- */

.confirm-dialog {
  background: var(--color-surface);
  color: var(--color-ink);
  border: var(--rule-strong);
  border-radius: var(--radius-md);
  padding: var(--space-6);
  max-width: 26rem;
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.15);
}

.confirm-dialog::backdrop { background: rgb(0 0 0 / 0.4); }
.confirm-dialog h2 { margin: var(--space-2) 0; font-size: var(--text-h3); letter-spacing: -0.01em; }
.confirm-dialog p { font-size: var(--text-sm); color: var(--color-ink-2); }
.confirm-actions { display: flex; gap: var(--space-2); justify-content: flex-end; margin-top: var(--space-4); }

.toast-region {
  position: fixed;
  right: var(--space-4);
  bottom: var(--space-4);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  z-index: 100;
}

.toast {
  background: var(--color-ink);
  color: var(--color-paper);
  font-size: var(--text-sm);
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-sm);
  box-shadow: 0 4px 12px rgb(0 0 0 / 0.2);
  max-width: min(24rem, calc(100vw - 2rem));
  transition: opacity var(--dur-base) var(--ease-out);
}

.toast.is-success { border-left: 4px solid var(--color-success); }
.toast.is-error { border-left: 4px solid var(--color-danger); }
.toast.is-leaving { opacity: 0; }

/* ---------- Colophon ---------- */

.colophon {
  margin-top: var(--space-8);
  border-top: var(--rule-strong);
  padding-top: var(--space-3);
}

/* ---------- Responsive: 4-col mobile, 8-col tablet, 12-col desktop ---------- */

@media (max-width: 960px) {
  .rail, .reader { grid-column: span 12; }
  .ledger-head { display: none; }
  .message-summary { grid-template-columns: 2.5rem 1fr; grid-template-rows: auto auto; }
  .message-from { grid-column: 2; }
  .message-subject { grid-column: 2; }
  .message-when { grid-column: 2; }
  .message-body { padding-left: var(--space-2); }
}

@media (max-width: 480px) {
  .page { padding: var(--space-4) var(--space-3) var(--space-8); }
  .plate { padding: var(--space-4); }
  .composer-actions .btn { flex: 1; }
  .reader-actions .btn { flex: 1; }
}

/* ---------- Motion discipline ---------- */

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .blueprint-grid, .paper-grain { display: none; }
}

/* ---------- Archival print ---------- */

@media print {
  @page { size: A4; margin: 2cm; }
  .rail .plate:first-child, .reader-actions, .composer-actions,
  .toast-region, .skip-link, .blueprint-grid, .paper-grain { display: none; }
  body { background: #fff; }
  .plate { border: 1px solid #000; }
  .colophon::after {
    content: "[ ARCHIVAL_PRINT_SPECIMEN ]";
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: 0.1em;
  }
}

/* Turnstile bot gate slot (hidden until a site key is configured). */
.turnstile-slot {
  margin: 0 0 var(--space-3);
}

/* ---------- Legal pages (docs / terms / privacy) ---------- */

.layout-legal {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  max-width: 44rem;
}

.prose p { font-size: var(--text-sm); color: var(--color-ink-2); margin: 0 0 var(--space-3); line-height: 1.65; }
.prose p:last-child { margin-bottom: 0; }
.prose strong { color: var(--color-ink); }
.prose ul { margin: 0 0 var(--space-3); padding-left: var(--space-6); font-size: var(--text-sm); color: var(--color-ink-2); line-height: 1.65; }
.prose li { margin-bottom: var(--space-1); }

.colophon-nav { display: flex; flex-wrap: wrap; gap: var(--space-2); align-items: baseline; }
.colophon-nav a { color: var(--color-ink-2); }
.colophon-nav a:hover { color: var(--color-accent); }
.colophon-nav a[aria-current="page"] { color: var(--color-ink); text-decoration: none; }