/* ============================================================
   PST ARCHIVE — aesthetic: editorial/forensic archive
   Warm paper palette, serif display, mono accents, grain overlay
   Supports light (default) and dark themes via [data-theme]
   ============================================================ */

:root,
:root[data-theme="light"] {
  --paper: #f2ede3;
  --paper-deep: #e8e1d3;
  --ink: #1b1814;
  --ink-soft: #3a332a;
  --ink-muted: #6b6258;
  --rule: #c9bfad;
  --rule-soft: #dcd3c1;
  --accent: #a8341f;      /* oxblood red */
  --accent-soft: #c95a42;
  --highlight: #e8d67a;   /* faded yellow marker */
  --ok: #2e6f3a;
  --warn: #a86b1e;
  --shadow: 0 1px 0 rgba(27, 24, 20, 0.04), 0 20px 40px -20px rgba(27, 24, 20, 0.25);
  --grain-opacity: 0.35;

  --font-display: "Fraunces", "Iowan Old Style", "Palatino", Georgia, serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", ui-monospace, monospace;
}

:root[data-theme="dark"] {
  --paper: #17140f;         /* deep inked paper */
  --paper-deep: #201c16;    /* slightly lighter ink-pool for surfaces */
  --ink: #e9e0cb;           /* warm paper-cream as the ink color */
  --ink-soft: #c4b99f;
  --ink-muted: #8a8170;
  --rule: #3a3226;
  --rule-soft: #2a251d;
  --accent: #d06347;        /* softened oxblood that holds up on dark */
  --accent-soft: #e4876c;
  --highlight: #d8b64a;     /* brass-yellow marker */
  --ok: #6fae7c;
  --warn: #d99a4a;
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.4), 0 20px 40px -20px rgba(0, 0, 0, 0.9);
  --grain-opacity: 0.12;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-display);
  font-feature-settings: "ss01", "onum";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-image:
    radial-gradient(circle at 10% 10%, rgba(168, 52, 31, 0.04), transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(74, 58, 42, 0.05), transparent 50%);
}

:root[data-theme="dark"] body {
  background-image:
    radial-gradient(circle at 10% 10%, rgba(208, 99, 71, 0.06), transparent 40%),
    radial-gradient(circle at 90% 90%, rgba(216, 182, 74, 0.03), transparent 50%);
}

/* grain overlay */
.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 9999;
  opacity: var(--grain-opacity);
  mix-blend-mode: multiply;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='200' height='200'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0.1 0 0 0 0 0.08 0 0 0 0 0.06 0 0 0 0.35 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

:root[data-theme="dark"] .grain {
  mix-blend-mode: screen;
}

/* ============================================================
   MASTHEAD
   ============================================================ */
.masthead {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  padding: 28px 40px 18px;
  border-bottom: 1px solid var(--ink);
  position: relative;
}

.masthead::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 40px;
  right: 40px;
  height: 1px;
  background: var(--ink);
}

.masthead-left { display: flex; align-items: center; gap: 18px; }

.logo-mark {
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border: 1px solid var(--ink);
  background: var(--paper);
}

.masthead-title h1 {
  margin: 0;
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
  font-variation-settings: "SOFT" 30, "WONK" 1;
}

.tagline {
  margin: 6px 0 0;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.masthead-right {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--warn);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--warn) 25%, transparent);
}
.status-dot.ok { background: var(--ok); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ok) 25%, transparent); }
.status-dot.err { background: var(--accent); box-shadow: 0 0 0 3px color-mix(in srgb, var(--accent) 25%, transparent); }

/* ============================================================
   WORKSPACE
   ============================================================ */
.workspace {
  display: grid;
  grid-template-columns: 340px 1fr;
  flex: 1;
  min-height: 0;
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  border-right: 1px solid var(--rule);
  padding: 28px 24px;
  display: flex;
  flex-direction: column;
  gap: 36px;
  overflow-y: auto;
  background: linear-gradient(180deg, rgba(232, 225, 211, 0.4), transparent 40%);
}

.section-heading {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--ink-soft);
  margin: 0 0 14px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule);
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.dropzone {
  display: block;
  border: 1.5px dashed var(--ink-muted);
  background: var(--paper-deep);
  padding: 28px 18px;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
  position: relative;
}
.dropzone:hover,
.dropzone.drag-over {
  border-color: var(--accent);
  background: var(--rule-soft);
  transform: translateY(-1px);
}
.dropzone-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--ink-soft);
}
.dropzone-title {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-style: italic;
  font-weight: 400;
}
.dropzone-title em {
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--accent);
}
.dropzone-hint {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.upload-progress { margin-top: 14px; }
.progress-label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  margin-bottom: 6px;
}
.progress-track {
  height: 4px;
  background: var(--rule-soft);
  overflow: hidden;
}
.progress-bar {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.2s ease;
}

.archive-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 14px;
}
.archive-head .section-heading {
  margin: 0;
  border: none;
  padding: 0;
}

.icon-btn {
  background: transparent;
  border: 1px solid var(--rule);
  padding: 5px 8px;
  cursor: pointer;
  color: var(--ink-soft);
  transition: all 0.15s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}
.icon-btn:hover {
  border-color: var(--ink);
  color: var(--accent);
}

.pst-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 8px; }

.pst-item {
  padding: 14px 14px;
  border: 1px solid var(--rule);
  background: var(--paper);
  cursor: pointer;
  transition: all 0.15s ease;
  position: relative;
}
.pst-item:hover {
  border-color: var(--ink);
  transform: translateX(2px);
}
.pst-item.active {
  border-color: var(--ink);
  background: var(--ink);
  color: var(--paper);
  box-shadow: 4px 4px 0 var(--accent);
}
.pst-item.active .pst-meta { color: color-mix(in srgb, var(--paper) 65%, transparent); }

.pst-name {
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  margin: 0 0 6px;
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 8px;
}
.pst-name-text {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
}
.pst-menu {
  background: none;
  border: none;
  color: inherit;
  opacity: 0.4;
  cursor: pointer;
  font-size: 1.1rem;
  line-height: 1;
  padding: 0 4px;
  letter-spacing: 0.1em;
  transition: opacity 0.15s, color 0.15s;
}
.pst-menu:hover { opacity: 1; color: var(--accent); }
.pst-item.active .pst-menu:hover { color: var(--accent-soft); }

.pst-meta {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--ink-muted);
  display: flex;
  justify-content: space-between;
  gap: 8px;
}

.pst-status {
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.pst-status.indexing { color: var(--warn); }
.pst-status.ready { color: var(--ok); }
.pst-status.failed { color: var(--accent); }
.pst-item.active .pst-status.indexing { color: color-mix(in srgb, var(--warn) 70%, var(--paper) 30%); }
.pst-item.active .pst-status.ready { color: color-mix(in srgb, var(--ok) 70%, var(--paper) 30%); }
.pst-item.active .pst-status.failed { color: var(--accent-soft); }

.empty-state {
  color: var(--ink-muted);
  font-style: italic;
  text-align: center;
  padding: 20px 0;
  font-size: 0.9rem;
}

/* ============================================================
   FOLDER GROUPS IN SIDEBAR
   ============================================================ */
.archive-actions {
  display: flex;
  gap: 4px;
}

.folder-group {
  list-style: none;
  padding: 0;
  margin: 0;
}

.folder-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px;
  margin: 14px 0 6px;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--rule);
  transition: color 0.15s;
}
.folder-group:first-child .folder-header { margin-top: 4px; }

.folder-header:hover { color: var(--accent); }

.folder-header-left {
  display: flex;
  align-items: center;
  gap: 6px;
  overflow: hidden;
}

.folder-caret {
  display: inline-block;
  width: 8px;
  transition: transform 0.2s;
  color: var(--ink-muted);
}
.folder-group.collapsed .folder-caret { transform: rotate(-90deg); }

.folder-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.folder-count {
  color: var(--ink-muted);
  font-size: 0.65rem;
  margin-left: 4px;
}

.folder-menu-btn {
  background: none;
  border: none;
  color: var(--ink-muted);
  cursor: pointer;
  padding: 2px 6px;
  font-size: 0.9rem;
  line-height: 1;
  opacity: 0;
  transition: opacity 0.15s, color 0.15s;
}
.folder-header:hover .folder-menu-btn { opacity: 1; }
.folder-menu-btn:hover { color: var(--accent); }

.folder-items {
  display: flex;
  flex-direction: column;
  gap: 8px;
  overflow: hidden;
  transition: max-height 0.25s ease-out;
  max-height: 2000px;
}
.folder-group.collapsed .folder-items {
  max-height: 0;
}

.folder-empty {
  font-style: italic;
  font-size: 0.8rem;
  color: var(--ink-muted);
  padding: 6px 4px;
}

/* Context menu for folder/PST actions */
.context-menu {
  position: fixed;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 4px 4px 0 var(--rule);
  z-index: 500;
  min-width: 160px;
  padding: 4px 0;
}
.context-menu button {
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 8px 14px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  color: var(--ink);
  cursor: pointer;
}
.context-menu button:hover {
  background: var(--paper-deep);
  color: var(--accent);
}
.context-menu button.danger:hover {
  color: var(--accent);
}
.context-menu hr {
  border: none;
  border-top: 1px solid var(--rule-soft);
  margin: 4px 0;
}

/* ============================================================
   MODAL
   ============================================================ */
.modal {
  position: fixed;
  inset: 0;
  background: color-mix(in srgb, var(--ink) 40%, transparent);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  z-index: 200;
  animation: fadeIn 0.2s ease-out;
}

.modal-card {
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 36px 36px 30px;
  max-width: 420px;
  width: 100%;
  box-shadow: 8px 8px 0 var(--accent);
  position: relative;
}
.modal-card h2 {
  margin: 0 0 4px;
  font-size: 1.5rem;
  font-weight: 500;
  letter-spacing: -0.015em;
}
.modal-subtitle {
  margin: 0 0 24px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--ink-muted);
  letter-spacing: 0.06em;
}
.modal-close {
  position: absolute;
  top: 10px;
  right: 14px;
  background: none;
  border: none;
  font-size: 1.8rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-muted);
  transition: color 0.15s, transform 0.15s;
}
.modal-close:hover {
  color: var(--accent);
  transform: rotate(90deg);
}

.auth-label select {
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 10px 12px;
  border: 1px solid var(--ink);
  background: var(--paper-deep);
  color: var(--ink);
  outline: none;
  cursor: pointer;
}
.auth-label select:focus {
  background: var(--paper);
  box-shadow: 3px 3px 0 var(--accent);
}

/* ============================================================
   READER
   ============================================================ */
.reader {
  display: flex;
  flex-direction: column;
  min-height: 0;
  min-width: 0;
}

.reader-head {
  padding: 28px 40px 20px;
  border-bottom: 1px solid var(--rule);
  background:
    linear-gradient(180deg, rgba(232, 225, 211, 0.3), transparent);
}

.reader-title h2 {
  margin: 0;
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1.1;
}

.reader-meta {
  margin: 6px 0 20px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.search-wrap {
  display: grid;
  grid-template-columns: 1fr 200px;
  gap: 10px;
}

#searchInput, #folderFilter {
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 10px 14px;
  border: 1px solid var(--ink);
  background: var(--paper);
  color: var(--ink);
  outline: none;
  transition: box-shadow 0.15s;
}
#searchInput:focus, #folderFilter:focus {
  box-shadow: 3px 3px 0 var(--accent);
}
#searchInput:disabled, #folderFilter:disabled {
  border-color: var(--rule);
  color: var(--ink-muted);
  background: var(--paper-deep);
  cursor: not-allowed;
}
#searchInput::placeholder {
  color: var(--ink-muted);
  font-style: italic;
}
#folderFilter { cursor: pointer; font-family: var(--font-mono); font-size: 0.8rem; }

.reader-body {
  flex: 1;
  overflow-y: auto;
  padding: 20px 40px;
  position: relative;
}

.reader-placeholder {
  text-align: center;
  padding: 80px 20px;
  color: var(--ink-muted);
}
.placeholder-ornament {
  font-size: 2rem;
  color: var(--accent);
  margin-bottom: 16px;
}
.reader-placeholder p {
  font-style: italic;
  font-size: 1.1rem;
  margin: 0;
}

/* ============================================================
   MESSAGE LIST
   ============================================================ */
.message-list {
  display: flex;
  flex-direction: column;
}

.message-row {
  padding: 16px 0;
  border-bottom: 1px solid var(--rule-soft);
  cursor: pointer;
  transition: all 0.12s ease;
  display: grid;
  grid-template-columns: 180px 1fr 140px;
  gap: 20px;
  align-items: baseline;
}
.message-row:hover {
  background: color-mix(in srgb, var(--paper-deep) 70%, transparent);
  padding-left: 8px;
  padding-right: 8px;
}

.mr-sender {
  font-weight: 500;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 0.95rem;
}

.mr-main {
  min-width: 0;
  overflow: hidden;
}
.mr-subject {
  font-size: 1.05rem;
  font-weight: 500;
  margin: 0 0 4px;
  color: var(--ink);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.mr-snippet {
  font-size: 0.85rem;
  color: var(--ink-muted);
  line-height: 1.5;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
}
.mr-snippet mark {
  background: var(--highlight);
  color: var(--ink);
  padding: 0 2px;
  font-weight: 500;
}

.mr-meta {
  text-align: right;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}
.mr-folder {
  margin-top: 4px;
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--accent);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mr-attached {
  display: inline-block;
  margin-left: 4px;
  color: var(--accent);
}

/* ============================================================
   MESSAGE VIEW
   ============================================================ */
.message-view {
  position: absolute;
  inset: 20px 40px;
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 8px 8px 0 var(--rule);
  overflow-y: auto;
  padding: 40px 50px;
  animation: slideIn 0.25s ease-out;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

.close-btn {
  position: absolute;
  top: 14px;
  right: 18px;
  background: none;
  border: none;
  font-size: 2rem;
  line-height: 1;
  cursor: pointer;
  color: var(--ink-muted);
  transition: color 0.15s, transform 0.15s;
}
.close-btn:hover {
  color: var(--accent);
  transform: rotate(90deg);
}

.message-header {
  border-bottom: 2px solid var(--ink);
  padding-bottom: 20px;
  margin-bottom: 24px;
}

.message-subject {
  font-size: 1.75rem;
  font-weight: 500;
  line-height: 1.2;
  letter-spacing: -0.015em;
  margin-bottom: 16px;
}

.message-meta {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 4px 20px;
  margin: 0;
}
.message-meta dt {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
  padding-top: 2px;
}
.message-meta dd {
  margin: 0;
  font-size: 0.95rem;
  color: var(--ink-soft);
  word-break: break-word;
}

.message-body {
  font-family: var(--font-display);
  font-size: 1rem;
  line-height: 1.7;
  color: var(--ink);
  white-space: pre-wrap;
  word-wrap: break-word;
  max-width: 70ch;
}

/* ============================================================
   PAGINATOR
   ============================================================ */
.paginator {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px 40px;
  border-top: 1px solid var(--rule);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--ink-soft);
  background: var(--paper-deep);
}
.paginator button {
  background: none;
  border: 1px solid var(--ink);
  padding: 6px 14px;
  cursor: pointer;
  font-family: inherit;
  font-size: inherit;
  color: var(--ink);
  transition: all 0.15s;
}
.paginator button:hover:not(:disabled) {
  background: var(--ink);
  color: var(--paper);
}
.paginator button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

/* ============================================================
   TOAST
   ============================================================ */
.toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--ink);
  color: var(--paper);
  padding: 12px 20px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  border-left: 3px solid var(--accent);
  box-shadow: var(--shadow);
  z-index: 1000;
  animation: toastSlide 0.3s ease-out;
}
@keyframes toastSlide {
  from { opacity: 0; transform: translate(-50%, 20px); }
  to { opacity: 1; transform: translate(-50%, 0); }
}

.hidden { display: none !important; }

/* ============================================================
   AUTH SCREENS (login + setup)
   ============================================================ */
.auth-screen {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  background:
    radial-gradient(circle at 30% 20%, color-mix(in srgb, var(--accent) 12%, transparent), transparent 45%),
    radial-gradient(circle at 70% 80%, color-mix(in srgb, var(--ink) 10%, transparent), transparent 55%),
    var(--paper);
  z-index: 100;
  animation: fadeIn 0.3s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.auth-card {
  width: 100%;
  max-width: 440px;
  background: var(--paper);
  border: 1px solid var(--ink);
  padding: 44px 40px 36px;
  box-shadow: 8px 8px 0 var(--rule);
  position: relative;
}
.auth-card::before {
  content: "";
  position: absolute;
  top: -6px;
  left: -6px;
  right: 6px;
  bottom: 6px;
  border: 1px solid var(--ink);
  pointer-events: none;
  z-index: -1;
  background: var(--paper-deep);
}

.auth-brand {
  text-align: center;
  margin-bottom: 28px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}
.auth-brand svg { color: var(--ink); margin: 0 auto 12px; display: block; }
.auth-brand h1 {
  margin: 0;
  font-size: 2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  line-height: 1;
}
.auth-tagline {
  margin: 8px 0 0;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--ink-muted);
}

.auth-form { display: flex; flex-direction: column; gap: 16px; }

.auth-intro {
  margin: 0 0 6px;
  font-size: 0.92rem;
  color: var(--ink-soft);
  line-height: 1.5;
  font-style: italic;
}

.auth-label {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.auth-label > span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink-soft);
}
.auth-label small {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  color: var(--ink-muted);
  letter-spacing: 0.04em;
}
.auth-label input {
  font-family: var(--font-display);
  font-size: 1rem;
  padding: 10px 12px;
  border: 1px solid var(--ink);
  background: var(--paper-deep);
  color: var(--ink);
  outline: none;
  transition: box-shadow 0.15s, background 0.15s;
}
.auth-label input:focus {
  background: var(--paper);
  box-shadow: 3px 3px 0 var(--accent);
}

.auth-btn {
  margin-top: 8px;
  padding: 12px 18px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: -0.01em;
  background: var(--ink);
  color: var(--paper);
  border: 1px solid var(--ink);
  cursor: pointer;
  transition: all 0.15s;
}
.auth-btn:hover {
  background: var(--accent);
  border-color: var(--accent);
  transform: translate(-1px, -1px);
  box-shadow: 3px 3px 0 var(--ink);
}

.auth-error {
  padding: 10px 14px;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  border-left: 3px solid var(--accent);
  color: var(--accent);
  font-size: 0.88rem;
  font-family: var(--font-mono);
  letter-spacing: 0.02em;
}

/* ============================================================
   USER CHIP in masthead
   ============================================================ */
.user-chip {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--ink-soft);
  padding: 4px 10px;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
  margin-left: 12px;
}

.logout-btn {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-soft);
  background: transparent;
  border: 1px solid var(--rule);
  padding: 5px 10px;
  cursor: pointer;
  transition: all 0.15s;
  margin-left: 8px;
}
.logout-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* ============================================================
   THEME TOGGLE
   ============================================================ */
.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border: 1px solid var(--rule);
  background: var(--paper-deep);
  color: var(--ink-soft);
  cursor: pointer;
  padding: 0;
  transition: all 0.2s ease;
  position: relative;
  overflow: hidden;
}
.theme-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}
.theme-toggle svg {
  width: 16px;
  height: 16px;
  transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.theme-toggle:hover svg {
  transform: rotate(25deg);
}
:root[data-theme="dark"] .theme-toggle:hover svg {
  transform: rotate(-25deg);
}

/* Icon visibility — show sun in light mode, moon in dark mode */
.theme-toggle .icon-sun { display: inline-block; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: inline-block; }

/* Floating variant shown on auth/setup screens */
.theme-toggle-float {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 200;
}
/* Hide the floating toggle once the main app is visible (in-masthead toggle takes over) */
body:has(#mainApp:not(.hidden)) .theme-toggle-float { display: none; }

/* ============================================================
   SCROLLBARS
   ============================================================ */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--rule);
  border: 2px solid var(--paper);
}
::-webkit-scrollbar-thumb:hover { background: var(--ink-muted); }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .workspace { grid-template-columns: 1fr; }
  .sidebar { border-right: none; border-bottom: 1px solid var(--rule); max-height: 50vh; }
  .masthead { padding: 20px 24px 14px; flex-wrap: wrap; gap: 16px; }
  .reader-head, .reader-body, .paginator { padding-left: 24px; padding-right: 24px; }
  .search-wrap { grid-template-columns: 1fr; }
  .message-row { grid-template-columns: 1fr; gap: 6px; }
  .mr-meta { text-align: left; }
  .message-view { inset: 12px; padding: 24px 20px; }
  .message-meta { grid-template-columns: 60px 1fr; }
}