/* ==========================================================================
   EasyMail — Webmail Template
   Design-only template. No backend logic; script.js only toggles UI state.
   ========================================================================== */

/* ---- Reset ---- */
*, *::before, *::after { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  overflow: hidden;
}
h1, h2, h3, p, ul, figure { margin: 0; }
ul { padding: 0; list-style: none; }
button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}
input {
  font: inherit;
  color: inherit;
}
a { color: inherit; text-decoration: none; }
svg { display: block; }
img { max-width: 100%; display: block; }
[hidden] { display: none !important; }

::selection {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}

/* ---- Design tokens ---- */
:root {
  /* Type — system stack only, no webfont loading. Dense productivity
     software reads as authentic when it uses the platform's own type. */
  --font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;

  --text-2xs: 0.6875rem;
  --text-xs: 0.75rem;
  --text-sm: 0.8125rem;
  --text-base: 0.9375rem;
  --text-md: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.3125rem;
  --text-2xl: 1.625rem;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 20px;
  --space-6: 24px;
  --space-7: 28px;
  --space-8: 36px;

  /* Radius — conservative, not pill-everywhere */
  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 10px;
  --radius-pill: 999px;

  --transition: 120ms ease;

  /* Layout */
  --sidebar-w: 252px;
  --list-w: 396px;
  --topbar-h: 56px;

  /* Light theme palette (fallback / toggle target) */
  --color-bg: #f5f5f3;
  --color-surface: #ffffff;
  --color-surface-2: #edece9;
  --color-surface-3: #e1e0dc;
  --color-border: #dedcd7;
  --color-border-strong: #c8c6c0;

  --color-text: #1c1c1e;
  --color-text-secondary: #65656a;
  --color-text-tertiary: #97969a;

  --color-accent: #128171;
  --color-accent-strong: #0b5f52;
  --color-accent-soft: #dbf1ec;
  --color-accent-contrast: #ffffff;

  --color-star: #b9791f;
  --color-star-soft: #f6ecd9;
  --color-danger: #b0392c;
  --color-danger-soft: #f7e4e0;

  --color-avatar-1: #128171;
  --color-avatar-2: #7c5cbf;
  --color-avatar-3: #bf6a4d;
  --color-avatar-4: #4c6fa5;
  --color-avatar-5: #7c8c4a;

  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.10);
  --shadow-md: 0 12px 28px -12px rgba(20, 20, 20, 0.20);
  --shadow-lg: 0 20px 44px -16px rgba(20, 20, 20, 0.28);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-bg: #1c1c1e;
    --color-surface: #222224;
    --color-surface-2: #28282b;
    --color-surface-3: #323235;
    --color-border: #37373a;
    --color-border-strong: #47474a;

    --color-text: #f1f1ef;
    --color-text-secondary: #a3a3a7;
    --color-text-tertiary: #737377;

    --color-accent: #2fae97;
    --color-accent-strong: #5ccab5;
    --color-accent-soft: rgba(47, 174, 151, 0.16);
    --color-accent-contrast: #06201b;

    --color-star: #e0a857;
    --color-star-soft: rgba(224, 168, 87, 0.15);
    --color-danger: #e2695c;
    --color-danger-soft: rgba(226, 105, 92, 0.15);

    --color-avatar-1: #2fae97;
    --color-avatar-2: #9a82d6;
    --color-avatar-3: #d38a68;
    --color-avatar-4: #7699c9;
    --color-avatar-5: #9bab6e;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
    --shadow-md: 0 12px 28px -12px rgba(0, 0, 0, 0.55);
    --shadow-lg: 0 20px 44px -16px rgba(0, 0, 0, 0.65);

    color-scheme: dark;
  }
}

:root[data-theme="dark"] {
  --color-bg: #1c1c1e;
  --color-surface: #222224;
  --color-surface-2: #28282b;
  --color-surface-3: #323235;
  --color-border: #37373a;
  --color-border-strong: #47474a;

  --color-text: #f1f1ef;
  --color-text-secondary: #a3a3a7;
  --color-text-tertiary: #737377;

  --color-accent: #2fae97;
  --color-accent-strong: #5ccab5;
  --color-accent-soft: rgba(47, 174, 151, 0.16);
  --color-accent-contrast: #06201b;

  --color-star: #e0a857;
  --color-star-soft: rgba(224, 168, 87, 0.15);
  --color-danger: #e2695c;
  --color-danger-soft: rgba(226, 105, 92, 0.15);

  --color-avatar-1: #2fae97;
  --color-avatar-2: #9a82d6;
  --color-avatar-3: #d38a68;
  --color-avatar-4: #7699c9;
  --color-avatar-5: #9bab6e;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.35);
  --shadow-md: 0 12px 28px -12px rgba(0, 0, 0, 0.55);
  --shadow-lg: 0 20px 44px -16px rgba(0, 0, 0, 0.65);

  color-scheme: dark;
}

:root[data-theme="light"] {
  --color-bg: #f5f5f3;
  --color-surface: #ffffff;
  --color-surface-2: #edece9;
  --color-surface-3: #e1e0dc;
  --color-border: #dedcd7;
  --color-border-strong: #c8c6c0;

  --color-text: #1c1c1e;
  --color-text-secondary: #65656a;
  --color-text-tertiary: #97969a;

  --color-accent: #128171;
  --color-accent-strong: #0b5f52;
  --color-accent-soft: #dbf1ec;
  --color-accent-contrast: #ffffff;

  --color-star: #b9791f;
  --color-star-soft: #f6ecd9;
  --color-danger: #b0392c;
  --color-danger-soft: #f7e4e0;

  --color-avatar-1: #128171;
  --color-avatar-2: #7c5cbf;
  --color-avatar-3: #bf6a4d;
  --color-avatar-4: #4c6fa5;
  --color-avatar-5: #7c8c4a;

  --shadow-sm: 0 1px 2px rgba(20, 20, 20, 0.10);
  --shadow-md: 0 12px 28px -12px rgba(20, 20, 20, 0.20);
  --shadow-lg: 0 20px 44px -16px rgba(20, 20, 20, 0.28);

  color-scheme: light;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: 0.001ms !important;
    animation-duration: 0.001ms !important;
  }
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: 1.45;
  -webkit-font-smoothing: antialiased;
}

.icon {
  width: 17px;
  height: 17px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.7;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}
.icon-sm { width: 14px; height: 14px; }

button:focus-visible,
a:focus-visible,
input:focus-visible,
[contenteditable]:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

/* ---- Custom scrollbars ---- */
.mail-items, .reading-pane, .compose-window-body {
  scrollbar-width: thin;
  scrollbar-color: var(--color-border-strong) transparent;
}
.mail-items::-webkit-scrollbar,
.reading-pane::-webkit-scrollbar,
.compose-window-body::-webkit-scrollbar { width: 8px; }
.mail-items::-webkit-scrollbar-thumb,
.reading-pane::-webkit-scrollbar-thumb,
.compose-window-body::-webkit-scrollbar-thumb {
  background: var(--color-border-strong);
  border-radius: var(--radius-pill);
  border: 2px solid var(--color-bg);
}

/* ==========================================================================
   App shell
   ========================================================================== */
.app-shell {
  display: grid;
  grid-template-columns: var(--sidebar-w) var(--list-w) 1fr;
  grid-template-rows: var(--topbar-h) 1fr;
  grid-template-areas:
    "sidebar topbar topbar"
    "sidebar list reading";
  height: 100vh;
  background: var(--color-bg);
}

/* ==========================================================================
   Sidebar
   ========================================================================== */
.sidebar {
  grid-area: sidebar;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--space-4) var(--space-3);
  background: var(--color-surface-2);
  border-right: 1px solid var(--color-border);
  min-height: 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-2) var(--space-4);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
}
.brand-mark .icon { width: 15px; height: 15px; }
.brand-name {
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: -0.01em;
  color: var(--color-text);
}

.btn-compose {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 11px var(--space-4);
  margin-bottom: var(--space-3);
  border-radius: var(--radius-lg);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-compose:hover { background: var(--color-accent-strong); box-shadow: var(--shadow-md); }
.btn-compose:active { transform: translateY(1px); }

.account-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 7px var(--space-2) 7px 10px;
  margin-bottom: var(--space-4);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: background var(--transition);
}
.account-row:hover { background: var(--color-surface-3); }
.account-row .icon { color: var(--color-text-tertiary); flex-shrink: 0; }
.account-email {
  flex: 1;
  min-width: 0;
  font-size: var(--text-xs);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.account-row .chevron { color: var(--color-text-tertiary); flex-shrink: 0; }

.account-menu {
  position: absolute;
  top: calc(100% + 6px);
  left: var(--space-2);
  right: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 1px;
  z-index: 30;
}
.account-menu button {
  text-align: left;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  color: var(--color-text);
}
.account-menu button:hover { background: var(--color-surface-3); }

.nav-primary, .nav-folders {
  display: flex;
  flex-direction: column;
  gap: 1px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 7px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}
.nav-item .icon { color: var(--color-text-tertiary); }
.nav-item:hover { background: var(--color-surface-3); color: var(--color-text); }
.nav-item.is-active {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
}
.nav-item.is-active .icon { color: var(--color-accent-strong); }

.nav-item .count {
  margin-left: auto;
  font-size: var(--text-2xs);
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: var(--color-text-tertiary);
}
.nav-item.is-active .count { color: var(--color-accent-strong); }
.nav-item .count.count-accent { color: var(--color-danger); }

.nav-divider {
  height: 1px;
  background: var(--color-border);
  margin: var(--space-4) var(--space-1);
}

.nav-section-label-row {
  display: flex;
  align-items: center;
  padding: 0 var(--space-1) var(--space-1) var(--space-2);
}
.nav-section-label {
  flex: 1;
  font-size: var(--text-2xs);
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--color-text-tertiary);
}
.nav-section-actions { display: flex; align-items: center; gap: 0; }
.nav-section-actions .icon-btn-ghost { width: 22px; height: 22px; }

.folder-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--dot, var(--color-accent));
  flex-shrink: 0;
}

.sidebar-spacer { flex: 1; }

.advanced-toggle {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px var(--space-2);
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}
.advanced-toggle:hover { background: var(--color-surface-3); color: var(--color-text); }
.advanced-chevron { color: var(--color-text-tertiary); transition: transform var(--transition); }
.advanced-toggle[aria-expanded="true"] .advanced-chevron { transform: rotate(90deg); }

.advanced-panel {
  display: flex;
  flex-direction: column;
  gap: 1px;
  padding-left: var(--space-2);
  margin-top: 1px;
}
.nav-item-sub {
  padding: 6px var(--space-2) 6px var(--space-6);
  font-size: var(--text-xs);
}

/* ==========================================================================
   Topbar
   ========================================================================== */
.topbar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: var(--space-3);
  min-width: 0;
  padding: 0 var(--space-5);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.icon-btn {
  position: relative;
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}
.icon-btn:hover { background: var(--color-surface-3); color: var(--color-text); }
.icon-btn-ghost { width: 26px; height: 26px; }

.only-mobile { display: none; }

.search {
  display: flex;
  align-items: center;
  flex: 1;
  min-width: 0;
  max-width: 560px;
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  border: 1px solid transparent;
  color: var(--color-text-tertiary);
  transition: border-color var(--transition), background var(--transition);
}
.search:focus-within {
  border-color: var(--color-accent);
  background: var(--color-surface);
}
.search-scope {
  display: flex;
  align-items: center;
  gap: 3px;
  padding: 8px var(--space-2) 8px var(--space-3);
  color: var(--color-text-tertiary);
  border-right: 1px solid var(--color-border);
  flex-shrink: 0;
}
.search input {
  border: 0;
  background: none;
  outline: none;
  flex: 1;
  min-width: 0;
  padding: 8px var(--space-2);
  color: var(--color-text);
  font-size: var(--text-sm);
}
.search input::placeholder { color: var(--color-text-tertiary); }
.search-filter {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  margin-right: 2px;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  transition: background var(--transition), color var(--transition);
}
.search-filter:hover { background: var(--color-surface-3); color: var(--color-text); }

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: auto;
}

.icon-sun, .icon-moon { position: absolute; }
.icon-moon { opacity: 0; transform: scale(0.5) rotate(-30deg); }
.icon-sun { opacity: 1; transform: scale(1) rotate(0); }
:root[data-theme="dark"] .icon-sun { opacity: 0; transform: scale(0.5) rotate(30deg); }
:root[data-theme="dark"] .icon-moon { opacity: 1; transform: scale(1) rotate(0); }
.icon-sun, .icon-moon { transition: opacity var(--transition), transform var(--transition); }

.dot-badge {
  position: absolute;
  top: 5px;
  right: 6px;
  min-width: 14px;
  height: 14px;
  padding: 0 3px;
  border-radius: var(--radius-pill);
  background: var(--color-danger);
  color: #fff;
  font-size: 9px;
  font-weight: 700;
  display: grid;
  place-items: center;
  border: 1.5px solid var(--color-bg);
}

.profile-wrap { position: relative; display: flex; }

.topbar-avatar {
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--avatar-color, var(--color-accent));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  margin-left: 6px;
  flex-shrink: 0;
  cursor: pointer;
}

.profile-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 172px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: var(--space-2);
  display: flex;
  flex-direction: column;
  gap: 1px;
  z-index: 30;
  cursor: default;
}
.profile-menu button {
  text-align: left;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-sm);
  font-weight: 400;
  color: var(--color-text);
}
.profile-menu button:hover { background: var(--color-surface-3); }

/* ==========================================================================
   Mail list
   ========================================================================== */
.mail-list {
  grid-area: list;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  border-right: 1px solid var(--color-border);
  background: var(--color-bg);
}

.list-toolbar {
  display: flex;
  align-items: center;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}
.checkbox {
  display: grid;
  place-items: center;
  width: 17px;
  height: 17px;
  margin: 0 var(--space-2) 0 4px;
  border: 1.5px solid var(--color-border-strong);
  border-radius: 4px;
  color: transparent;
  flex-shrink: 0;
  transition: background var(--transition), border-color var(--transition);
}
.checkbox .icon { width: 11px; height: 11px; stroke-width: 3; }
.checkbox[aria-pressed="true"] {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-accent-contrast);
}
.toolbar-divider {
  width: 1px;
  height: 20px;
  background: var(--color-border);
  margin: 0 var(--space-2) 0 0;
}
.toolbar-spacer { flex: 1; }

.filter-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: background var(--transition), color var(--transition);
}
.filter-btn:hover { background: var(--color-surface-3); color: var(--color-text); }

.pagination {
  display: flex;
  align-items: center;
  gap: 2px;
  margin-left: var(--space-2);
  padding-left: var(--space-2);
  border-left: 1px solid var(--color-border);
}
.pagination-range {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
  margin-right: 4px;
  white-space: nowrap;
}

.mail-items {
  flex: 1;
  overflow-y: auto;
}

.mail-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  text-align: left;
  padding: 9px var(--space-4);
  border-bottom: 1px solid var(--color-border);
  cursor: pointer;
  transition: background var(--transition);
}
.mail-item:hover { background: var(--color-surface-2); }
.mail-item.is-active { background: var(--color-accent-soft); }

.unread-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0;
  flex-shrink: 0;
}
.mail-item.is-unread .unread-dot { opacity: 1; }

.avatar {
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--avatar-color, var(--color-accent));
  color: #fff;
  font-size: var(--text-xs);
  font-weight: 700;
  letter-spacing: 0.01em;
  flex-shrink: 0;
}
.avatar-sm { width: 26px; height: 26px; font-size: 0.65rem; }
.mail-item .avatar { width: 28px; height: 28px; font-size: 0.65rem; flex-shrink: 0; }

.star-btn {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  border-radius: var(--radius-sm);
  color: var(--color-text-tertiary);
  opacity: 0;
  flex-shrink: 0;
  transition: opacity var(--transition), color var(--transition), background var(--transition);
}
.mail-item:hover .star-btn,
.mail-item.is-starred .star-btn,
.thread-message-header .star-btn {
  opacity: 1;
}
.star-btn:hover { background: var(--color-star-soft); color: var(--color-star); }
.star-btn[aria-pressed="true"] {
  color: var(--color-star);
}
.star-btn[aria-pressed="true"] .icon { fill: currentColor; }

.sender {
  flex: 0 0 auto;
  max-width: 148px;
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.mail-item.is-unread .sender { font-weight: 700; color: var(--color-text); }

.mail-item-line {
  flex: 1;
  min-width: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: var(--text-sm);
}
.mail-item-line .subj { color: var(--color-text-secondary); }
.mail-item.is-unread .mail-item-line .subj { font-weight: 700; color: var(--color-text); }
.mail-item-line .snip { color: var(--color-text-tertiary); }

.attachment-flag { color: var(--color-text-tertiary); flex-shrink: 0; }

.time {
  flex-shrink: 0;
  width: 56px;
  text-align: right;
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  font-variant-numeric: tabular-nums;
}
.mail-item.is-unread .time { color: var(--color-text-secondary); font-weight: 600; }

/* ==========================================================================
   Reading pane
   ========================================================================== */
.reading-pane {
  grid-area: reading;
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  background: var(--color-surface);
}

.reading-pane-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
  padding: var(--space-5) var(--space-6) var(--space-3);
  position: sticky;
  top: 0;
  background: var(--color-surface);
  z-index: 5;
  border-bottom: 1px solid var(--color-border);
}
.subject-block { flex: 1; min-width: 0; }
.subject {
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: -0.01em;
  text-wrap: balance;
  margin-bottom: var(--space-2);
}
.subject-meta {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.chip {
  font-size: var(--text-2xs);
  font-weight: 700;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  background: var(--color-surface-2);
  color: var(--color-text-secondary);
}
.chip-accent { background: var(--color-accent-soft); color: var(--color-accent-strong); }
.message-count {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
}

.reading-pane-actions {
  display: flex;
  align-items: center;
  gap: 1px;
  flex-shrink: 0;
}

.thread {
  padding: var(--space-2) var(--space-6) var(--space-8);
}

.thread-message {
  position: relative;
  border-bottom: 1px solid var(--color-border);
}
.thread-message:last-child { border-bottom: 0; }

.thread-message-summary {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  width: 100%;
  text-align: left;
  padding: 10px var(--space-2);
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.thread-message-summary:hover { background: var(--color-surface-2); }
.thread-message-summary .tm-sender {
  font-size: var(--text-sm);
  font-weight: 600;
  flex-shrink: 1;
  width: auto;
  max-width: 132px;
  min-width: 64px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thread-message-summary .tm-snippet {
  flex: 1;
  min-width: 0;
  font-size: var(--text-sm);
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.thread-message-summary .tm-date {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.thread-message-summary .chevron {
  color: var(--color-text-tertiary);
  transition: transform var(--transition);
  flex-shrink: 0;
}

.thread-message.is-expanded { padding: var(--space-4) 0 var(--space-6); }
.thread-message.is-expanded .thread-message-summary { display: none; }

.thread-message-detail { display: none; }
.thread-message.is-expanded .thread-message-detail { display: block; }

.thread-message-header {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: 0 var(--space-2);
  margin-bottom: var(--space-4);
}
.tm-header-info {
  display: flex;
  flex-direction: column;
  min-width: 0;
  flex: 1;
}
.tm-header-info .tm-sender {
  font-size: var(--text-base);
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tm-address {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.tm-header-meta {
  display: flex;
  align-items: center;
  gap: 2px;
  flex-shrink: 0;
}
.tm-header-meta .tm-date {
  font-size: var(--text-xs);
  color: var(--color-text-tertiary);
  margin-right: var(--space-2);
  font-variant-numeric: tabular-nums;
}

.thread-message-body {
  font-size: var(--text-md);
  line-height: 1.65;
  color: var(--color-text);
  padding: 0 var(--space-2);
  max-width: 640px;
}
.thread-message-body p { margin-bottom: var(--space-4); }
.thread-message-body ul {
  margin: 0 0 var(--space-4);
  padding-left: 1.3em;
  list-style: disc;
}
.thread-message-body li { margin-bottom: 6px; }

.attachment-chip {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  margin: 0 var(--space-2) var(--space-5);
  padding: 8px var(--space-3);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  background: var(--color-surface-2);
}
.attachment-name { font-weight: 600; color: var(--color-text); }
.attachment-size { color: var(--color-text-tertiary); }

.thread-reply-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: 0 var(--space-2);
}

.pill-btn {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 8px var(--space-4);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.pill-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
  background: var(--color-accent-soft);
}
.pill-btn .icon { color: currentColor; }

.icon-only-btn {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.icon-only-btn:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-strong);
  background: var(--color-accent-soft);
}

/* ---- Inline reply compose ---- */
.inline-compose {
  margin: var(--space-4) var(--space-2) 0;
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  box-shadow: var(--shadow-sm);
}
.inline-compose-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.inline-compose-body {
  min-height: 120px;
  padding: var(--space-4);
  font-size: var(--text-base);
  line-height: 1.6;
  outline: none;
}
.inline-compose-body:empty::before {
  content: attr(data-placeholder);
  color: var(--color-text-tertiary);
}
.inline-compose-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
  background: var(--color-surface-2);
}

.format-group { display: flex; align-items: center; gap: 2px; }
.fmt-btn {
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: var(--radius-sm);
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
  transition: background var(--transition), color var(--transition);
}
.fmt-btn:hover { background: var(--color-surface-3); color: var(--color-text); }
.fmt-btn[aria-pressed="true"] { background: var(--color-surface-3); color: var(--color-accent-strong); }

.fmt-emoji-wrap { position: relative; display: flex; }
.emoji-popover {
  position: absolute;
  bottom: calc(100% + 6px);
  left: 0;
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 2px;
  width: 216px;
  padding: var(--space-2);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 10;
}
.emoji-popover button {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  font-size: 1.05rem;
  line-height: 1;
  transition: background var(--transition);
}
.emoji-popover button:hover { background: var(--color-surface-3); }

.btn-send {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px var(--space-4);
  border-radius: var(--radius-md);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
  font-size: var(--text-sm);
  transition: background var(--transition);
}
.btn-send:hover { background: var(--color-accent-strong); }
.btn-send .icon { width: 15px; height: 15px; }

/* ==========================================================================
   Floating compose window
   ========================================================================== */
.compose-window {
  position: fixed;
  right: var(--space-6);
  bottom: 0;
  width: 460px;
  max-width: calc(100vw - 48px);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-bottom: none;
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  box-shadow: var(--shadow-lg);
  z-index: 50;
  display: flex;
  flex-direction: column;
  max-height: 540px;
}
.compose-window.is-minimized { max-height: unset; }
.compose-window.is-minimized .compose-window-body,
.compose-window.is-minimized .compose-window-toolbar {
  display: none;
}

.compose-window.is-maximized {
  top: var(--space-4);
  left: var(--space-4);
  right: var(--space-4);
  bottom: var(--space-4);
  width: auto;
  max-width: none;
  max-height: none;
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  z-index: 60;
}

.compose-window-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px var(--space-4);
  background: var(--color-surface-2);
  border-bottom: 1px solid var(--color-border);
  border-radius: var(--radius-lg) var(--radius-lg) 0 0;
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  cursor: pointer;
}
.compose-window-controls { display: flex; align-items: center; gap: 2px; }

.compose-draft-status {
  position: relative;
  display: inline-flex;
  width: 14px;
  height: 14px;
  margin-left: var(--space-2);
  vertical-align: -2px;
}
.compose-draft-status .ds-icon {
  position: absolute;
  inset: 0;
  width: 14px;
  height: 14px;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity var(--transition), transform var(--transition);
}
.compose-draft-status .ds-editing { color: var(--color-text-tertiary); }
.compose-draft-status .ds-saving { color: var(--color-star); }
.compose-draft-status .ds-saved { color: var(--color-accent); }
.compose-draft-status .ds-error { color: var(--color-danger); }

.compose-draft-status[data-state="editing"] .ds-editing,
.compose-draft-status[data-state="saving"] .ds-saving,
.compose-draft-status[data-state="saved"] .ds-saved,
.compose-draft-status[data-state="error"] .ds-error {
  opacity: 1;
  transform: scale(1);
}
.compose-draft-status[data-state="saving"] .ds-saving { animation: ds-spin 900ms linear infinite; }

@keyframes ds-spin {
  from { transform: scale(1) rotate(0deg); }
  to { transform: scale(1) rotate(360deg); }
}

.compose-window-body {
  display: flex;
  flex-direction: column;
  overflow-y: auto;
  flex: 1;
  min-height: 0;
}
.compose-field {
  padding: var(--space-3) var(--space-4);
  border: 0;
  border-bottom: 1px solid var(--color-border);
  outline: none;
  background: none;
  font-size: var(--text-sm);
}
.compose-field::placeholder { color: var(--color-text-tertiary); }
.compose-editor {
  padding: var(--space-4);
  min-height: 180px;
  font-size: var(--text-base);
  line-height: 1.6;
  outline: none;
  flex: 1;
}
.compose-editor:empty::before {
  content: attr(data-placeholder);
  color: var(--color-text-tertiary);
}

.compose-window-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
  border-top: 1px solid var(--color-border);
}
.compose-window-toolbar-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
}
.compose-window-toolbar-actions .icon-btn-ghost:hover { color: var(--color-danger); background: var(--color-danger-soft); }

.scrim {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.5);
  z-index: 40;
}

/* ==========================================================================
   Responsive
   ========================================================================== */
@media (max-width: 1180px) {
  .app-shell { grid-template-columns: var(--sidebar-w) 340px 1fr; }
  .hide-narrow { display: none; }
}

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-areas:
      "topbar"
      "list";
  }
  .sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    width: 264px;
    z-index: 45;
    transform: translateX(-100%);
    transition: transform var(--transition);
    box-shadow: var(--shadow-lg);
  }
  .app-shell.sidebar-open .sidebar { transform: translateX(0); }
  .only-mobile { display: grid; }
  .search { max-width: none; }

  .action-extra { display: none; }
  .reading-pane-header { padding: var(--space-4) var(--space-5) var(--space-3); }
  .subject { font-size: var(--text-lg); }

  .mail-list { border-right: none; }
  .reading-pane {
    position: fixed;
    inset: var(--topbar-h) 0 0 0;
    z-index: 20;
    transform: translateX(100%);
    transition: transform var(--transition);
  }
  .app-shell.reading-open .mail-list { display: none; }
  .app-shell.reading-open .reading-pane { transform: translateX(0); }
  .back-btn { display: grid; }

  .compose-window { right: var(--space-3); width: calc(100vw - 24px); }
}

@media (min-width: 981px) {
  .back-btn { display: none; }
}

/* ==========================================================================
   Auth (login)
   ========================================================================== */
.auth-shell {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: var(--color-bg);
  padding: var(--space-5);
}

.auth-card {
  width: 100%;
  max-width: 380px;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: var(--space-7) var(--space-6);
}

.auth-card .brand {
  justify-content: center;
  padding: 0 0 var(--space-6);
}
.auth-card .brand-name { font-size: var(--text-xl); }

.auth-title {
  text-align: center;
  font-size: var(--text-base);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-6);
}

.auth-field {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}
.auth-field label {
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-text-secondary);
}
.auth-field input {
  padding: 10px var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
  color: var(--color-text);
  font-size: var(--text-base);
}
.auth-field input:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: -1px;
}

.auth-error {
  background: var(--color-danger-soft);
  color: var(--color-danger);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  font-size: var(--text-sm);
  margin-bottom: var(--space-4);
}

.btn-primary {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: 11px var(--space-4);
  border-radius: var(--radius-lg);
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  font-weight: 600;
  font-size: var(--text-sm);
  box-shadow: var(--shadow-sm);
  transition: background var(--transition), box-shadow var(--transition), transform var(--transition);
}
.btn-primary:hover { background: var(--color-accent-strong); box-shadow: var(--shadow-md); }
.btn-primary:active { transform: translateY(1px); }

/* ==========================================================================
   Support Engineer area
   ========================================================================== */
.support-shell {
  display: flex;
  align-items: stretch;
  min-height: 100vh;
  background: var(--color-bg);
}

/* Self-contained sidebar for the support area: deliberately not reusing
   .sidebar, which is grid/breakpoint-coupled to the mail app-shell (named
   grid area + an off-canvas mobile mode that only a hamburger button the
   support layout doesn't have can reopen). */
.support-sidebar {
  flex: 0 0 var(--sidebar-w);
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: var(--space-4) var(--space-3);
  background: var(--color-surface-2);
  border-right: 1px solid var(--color-border);
}

.support-content {
  flex: 1;
  min-width: 0;
  padding: var(--space-6) var(--space-7);
  overflow-y: auto;
}

@media (max-width: 720px) {
  .support-shell { flex-direction: column; }
  .support-sidebar { flex: 0 0 auto; border-right: 0; border-bottom: 1px solid var(--color-border); }
}

.support-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: var(--space-4);
  margin-bottom: var(--space-6);
}
.support-header h1 {
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.support-header p {
  color: var(--color-text-secondary);
  font-size: var(--text-sm);
}

.support-banner {
  background: var(--color-star-soft);
  color: var(--color-star);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  margin-bottom: var(--space-6);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: var(--space-4);
  margin-bottom: var(--space-7);
}
.stat-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-5);
}
.stat-card .stat-label {
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.stat-card .stat-value {
  font-size: var(--text-2xl);
  font-weight: 700;
  margin-top: var(--space-2);
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  font-size: var(--text-sm);
}
.data-table th, .data-table td {
  text-align: left;
  padding: var(--space-3) var(--space-4);
  border-bottom: 1px solid var(--color-border);
}
.data-table th {
  color: var(--color-text-secondary);
  font-weight: 600;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.02em;
  background: var(--color-surface-2);
}
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--color-surface-2); }
.data-table a { color: var(--color-accent-strong); font-weight: 600; }

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 3px var(--space-2);
  border-radius: var(--radius-pill);
  font-size: var(--text-2xs);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.02em;
}
.badge-ok { background: var(--color-accent-soft); color: var(--color-accent-strong); }
.badge-missing { background: var(--color-danger-soft); color: var(--color-danger); }
.badge-warn { background: var(--color-star-soft); color: var(--color-star); }

.detail-list { display: flex; flex-direction: column; gap: var(--space-3); margin-bottom: var(--space-6); }
.detail-row {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-4);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}
.detail-row-label { font-weight: 600; }
.detail-row-meta { color: var(--color-text-secondary); font-size: var(--text-xs); margin-top: 2px; }
.detail-row-record {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: var(--text-xs);
  color: var(--color-text-secondary);
  max-width: 420px;
  overflow-wrap: anywhere;
  text-align: right;
}

/* ==========================================================================
   Webmail wiring (server-rendered additions on top of the design template)
   ========================================================================== */
.action-extra-form,
.list-toolbar-form { display: contents; }

.reading-pane-empty {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--color-text-tertiary);
  font-size: var(--text-sm);
}

.mail-body-frame {
  width: 100%;
  min-height: 120px;
  border: 0;
  background: transparent;
}

.inline-compose-to {
  width: 100%;
  margin-bottom: var(--space-2);
  padding: 8px var(--space-3);
  border: 1px solid var(--color-border-strong);
  border-radius: var(--radius-md);
  background: var(--color-surface-2);
}

.form-flash {
  background: var(--color-accent-soft);
  color: var(--color-accent-strong);
  border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  margin: var(--space-3) var(--space-4) 0;
}