/* ============================================================
   Studio — Editorial × Developer Console
   Type:  Instrument Serif (display) / Geist (UI) / JetBrains Mono (digits)
   Tone:  Warm paper, ink black, single rust accent. No gradients.
   ============================================================ */

:root {
  /* palette */
  --paper:        #FAFAF7;
  --paper-2:      #F4F2EC;
  --paper-3:      #ECE9E1;
  --ink:          #0F0F0E;
  --ink-2:        #2A2926;
  --ink-3:        #6B6963;
  --ink-4:        #9C998F;
  --line:         #E8E5DE;
  --line-soft:    #F0EDE5;
  --rust:         #B84A20;
  --rust-soft:    #F6E4DA;
  --danger:       #9C2A1A;
  --danger-soft:  #F6DFD9;

  /* type */
  --serif: "Instrument Serif", "Source Han Serif SC", "Songti SC", Georgia, serif;
  --sans:  "Geist", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  --mono:  "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;

  /* radii */
  --r-sm: 4px;
  --r-md: 6px;
  --r-lg: 10px;

  color-scheme: light;
  font-family: var(--sans);
  color: var(--ink);
  background: var(--paper);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--sans);
  font-size: 14px;
  font-feature-settings: "ss01", "cv11";
  color: var(--ink);
  /* paper texture: subtle grain via SVG noise */
  background:
    radial-gradient(circle at 12% 0%, rgba(184, 74, 32, .04), transparent 38rem),
    radial-gradient(circle at 90% 110%, rgba(15, 15, 14, .04), transparent 36rem),
    var(--paper);
  background-attachment: fixed;
}

/* ---------- Shell & Card ---------- */
.shell {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 28px;
}
.shell.wide { place-items: start center; }

.card {
  width: min(1240px, 100%);
  background: transparent;
  border: none;
  border-radius: 0;
  box-shadow: none;
  padding: 24px 28px 64px;
}

/* ---------- Topbar / Brand ---------- */
.topbar {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  padding-bottom: 18px;
  margin-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.brand {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
}

.brand h1 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 400;
  font-size: clamp(38px, 5.4vw, 56px);
  line-height: 1;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.brand h1 em {
  font-style: italic;
  color: var(--rust);
}

.brand-mark {
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 42px;
  height: 2px;
  background: var(--rust);
}

/* ---------- Buttons ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 14px;
  border-radius: var(--r-md);
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  text-decoration: none;
  font: inherit;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -0.005em;
  cursor: pointer;
  transition: transform .15s ease, background .15s ease, color .15s ease, border-color .15s ease;
}
.button.primary { background: var(--ink); color: var(--paper); }
.button.primary:hover { background: var(--rust); border-color: var(--rust); }
.button.ghost {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.button.ghost:hover { background: var(--paper-2); border-color: var(--ink-3); }
.button:active { transform: translateY(1px); }

.actions { display: flex; gap: 8px; }

/* ---------- Inputs (global reset) ---------- */
input, textarea, select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  padding: 9px 12px;
  font: inherit;
  font-size: 13px;
  background: var(--paper);
  color: var(--ink);
  transition: border-color .12s ease, background .12s ease;
}
input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--ink);
  background: #fff;
}
input::placeholder, textarea::placeholder { color: var(--ink-4); }

.hidden { display: none !important; }

/* ---------- Status bar ---------- */
.status,
.workspace-status {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .04em;
  color: var(--ink-3);
  padding: 10px 12px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper);
  margin: 0 0 18px;
}

/* ---------- Layout ---------- */
.mail-layout, .console-layout {
  display: grid;
  gap: 18px;
  margin-top: 0;
}
.mail-layout { grid-template-columns: 230px 1fr; }
.console-layout { grid-template-columns: 220px 168px minmax(280px, 1fr); }
.console-layout.with-reader { grid-template-columns: 220px 168px minmax(280px, 1fr) minmax(360px, 1.15fr); }
.console-layout:not(.with-reader) .reader-panel { display: none; }

.accounts-panel, .folders-panel, .messages-panel, .reader-panel, .sidebar { min-width: 0; }

/* ---------- Sidebar ---------- */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 14px 8px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
}

.sidebar-search {
  padding: 7px 10px;
  font-size: 12.5px;
  border-radius: var(--r-sm);
  background: var(--paper-2);
  border-color: transparent;
}
.sidebar-search:focus { background: #fff; border-color: var(--ink); }

.sidebar-group { display: flex; flex-direction: column; gap: 1px; }

.sidebar-group-head { padding: 4px 10px 6px; }
.sidebar-group-title {
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-4);
  font-weight: 500;
}

.sidebar-list { display: flex; flex-direction: column; gap: 0; }

.sidebar-row { position: relative; }

.sidebar-item {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 100%;
  padding: 7px 12px 7px 10px;
  border: 0;
  border-left: 2px solid transparent;
  border-radius: 0;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  text-align: left;
  transition: background .1s ease, color .1s ease;
}
.sidebar-item:hover { background: var(--paper-2); color: var(--ink); }
.sidebar-item.active {
  background: var(--paper-2);
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--rust);
}

.sidebar-item-label {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-item-meta {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.sidebar-item.active .sidebar-item-meta { color: var(--rust); }

.sidebar-item-sub {
  display: block;
  width: 100%;
  font-size: 11px;
  color: var(--ink-4);
  margin-top: 1px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-account .sidebar-item { flex-wrap: wrap; }
.sidebar-account .sidebar-item-label { flex: 1 1 100%; font-size: 12.5px; }

.sidebar-account-tags {
  display: flex;
  gap: 3px;
  flex-wrap: wrap;
  margin-top: 4px;
  width: 100%;
}
.sidebar-account-tags em {
  font-style: normal;
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .04em;
  padding: 1px 5px;
  border-radius: 2px;
  background: var(--paper-3);
  color: var(--ink-3);
}

/* sidebar inline-add row */
.sidebar-add {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px;
  padding: 4px 8px 0;
}
.sidebar-add input {
  padding: 6px 8px;
  font-size: 12px;
  border-color: transparent;
  background: var(--paper-2);
}
.sidebar-add input:focus { border-color: var(--ink); background: #fff; }
.sidebar-add-btn {
  width: 26px;
  height: 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--paper);
  color: var(--ink-2);
  cursor: pointer;
  font-weight: 500;
  font-size: 14px;
  line-height: 1;
}
.sidebar-add-btn:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }

/* tag hover-actions (JS toggled .tag-hot) */
.sidebar-row .tag-hover-actions {
  position: absolute;
  right: 6px;
  top: 50%;
  z-index: 20;
  display: flex;
  gap: 3px;
  padding: 2px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--paper);
  opacity: 0;
  pointer-events: none;
  transform: translateY(-50%);
  transition: opacity .12s ease;
}
.sidebar-row.tag-hot .tag-hover-actions { opacity: 1; pointer-events: auto; }
.tag-action {
  border: 0;
  border-radius: 3px;
  padding: 3px 7px;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  font-size: 10.5px;
  font-family: var(--mono);
  letter-spacing: .04em;
  white-space: nowrap;
}
.tag-action:hover { background: var(--paper-2); }
.tag-action.danger { color: var(--danger); }
.tag-action.danger:hover { background: var(--danger-soft); }

/* current-account tools card inside sidebar */
.sidebar-account-tools {
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-2);
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.sidebar-account-tools.hidden { display: none; }
.sidebar-account-tools .tools-title {
  font-family: var(--mono);
  font-size: 9.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-4);
  font-weight: 500;
}
.sidebar-account-tools .tools-email {
  font-weight: 600;
  color: var(--ink);
  font-size: 12px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.sidebar-account-tools .tools-tags { display: flex; gap: 3px; flex-wrap: wrap; }
.sidebar-account-tools .tag-chip {
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 2px 6px;
  background: var(--paper);
  color: var(--ink-2);
  cursor: pointer;
  font-weight: 500;
  font-size: 11px;
}
.sidebar-account-tools .tag-chip:hover { border-color: var(--danger); color: var(--danger); }
.sidebar-account-tools .tag-chip span { margin-left: 3px; color: var(--ink-4); }
.sidebar-account-tools .tag-chip:hover span { color: var(--danger); }
.sidebar-account-tools .tools-add { display: grid; grid-template-columns: 1fr auto; gap: 4px; }
.sidebar-account-tools .tools-add select { padding: 5px 7px; font-size: 12px; }
.sidebar-account-tools .tools-add .mini-button {
  padding: 5px 10px;
  font-size: 11px;
  border: 1px solid var(--ink);
  background: var(--ink);
  color: var(--paper);
  border-radius: var(--r-sm);
  cursor: pointer;
  font-weight: 500;
}
.sidebar-account-tools .tools-add .mini-button:hover { background: var(--rust); border-color: var(--rust); }

/* ---------- Section headings ---------- */
h2 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  font-weight: 500;
}

.panel-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
}

.mini-button {
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  padding: 6px 10px;
  background: var(--paper);
  color: var(--ink);
  cursor: pointer;
  font-size: 12px;
  font-weight: 500;
}
.mini-button:hover { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.mini-button:disabled { opacity: .4; cursor: not-allowed; }

/* ---------- Folders panel ---------- */
.folders-panel {
  padding: 14px 10px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
}
.folders { display: flex; flex-direction: column; gap: 1px; }
.folder {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  width: 100%;
  padding: 7px 10px 7px 12px;
  border: 0;
  border-left: 2px solid transparent;
  background: transparent;
  color: var(--ink-2);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  text-align: left;
  transition: background .1s ease;
}
.folder:hover { background: var(--paper-2); color: var(--ink); }
.folder.active {
  background: var(--paper-2);
  color: var(--ink);
  font-weight: 600;
  border-left-color: var(--rust);
}
.folder small {
  font-family: var(--mono);
  font-size: 10.5px;
  color: var(--ink-4);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
}
.folder.active small { color: var(--rust); }

/* ---------- Messages panel ---------- */
.messages-panel {
  padding: 18px 18px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
}

.send-box {
  display: grid;
  gap: 8px;
  padding: 14px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: var(--paper-2);
  margin-bottom: 18px;
}
.send-box input, .send-box textarea {
  background: var(--paper);
  border-color: var(--line);
}
.send-box textarea { resize: vertical; }

.messages {
  display: flex;
  flex-direction: column;
}

.message {
  position: relative;
  padding: 12px 14px;
  border: 0;
  border-top: 1px solid var(--line-soft);
  background: transparent;
  cursor: pointer;
  transition: background .1s ease;
}
.message:first-child { border-top: 0; }
.message:hover { background: var(--paper-2); }
.message.active {
  background: var(--paper-2);
}
.message.active::before {
  content: "";
  position: absolute;
  left: 0; top: 8px; bottom: 8px;
  width: 2px;
  background: var(--rust);
}

.message .subject {
  font-weight: 600;
  font-size: 13.5px;
  letter-spacing: -0.005em;
  margin-bottom: 3px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--ink);
}
.message .meta {
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .02em;
  color: var(--ink-4);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.5;
}
.message .preview {
  font-size: 12px;
  color: var(--ink-3);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  line-height: 1.5;
  margin-top: 2px;
}

/* ---------- Pager ---------- */
.pager {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--line);
}
.pager.hidden { display: none; }
.pager-btn {
  border: 1px solid var(--line);
  background: var(--paper);
  color: var(--ink);
  border-radius: var(--r-sm);
  padding: 6px 12px;
  font: inherit;
  font-size: 12px;
  font-weight: 500;
  cursor: pointer;
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.pager-btn:hover:not(:disabled) { background: var(--ink); color: var(--paper); border-color: var(--ink); }
.pager-btn:focus-visible { outline: 2px solid var(--rust); outline-offset: 2px; }
.pager-btn:disabled { color: var(--ink-4); background: var(--paper); cursor: not-allowed; opacity: .55; }

.pager-info {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .04em;
  color: var(--ink-2);
  font-variant-numeric: tabular-nums;
}
.pager-info small {
  color: var(--ink-4);
  font-weight: 400;
  margin-left: 6px;
}

/* ---------- Reader panel ---------- */
.reader-panel {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: var(--paper);
}
.reader-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}
.reader-head h2 { margin: 0; }

.reader {
  min-height: 480px;
  font-size: 14px;
  line-height: 1.65;
  color: var(--ink-2);
}
.reader.empty {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-family: var(--serif);
  font-style: italic;
  font-size: 18px;
  color: var(--ink-4);
  padding: 40px 20px;
}
.reader.loading {
  color: var(--ink-4);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: .04em;
}

.message-detail h3 {
  margin: 0 0 16px;
  font-family: var(--serif);
  font-weight: 400;
  font-size: 26px;
  line-height: 1.2;
  letter-spacing: -0.012em;
  color: var(--ink);
}
.detail-meta {
  margin: 4px 0;
  font-size: 12.5px;
  color: var(--ink-3);
  line-height: 1.55;
}
.detail-meta strong {
  font-weight: 500;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-4);
  margin-right: 4px;
}
.attachment-note {
  margin-top: 12px;
  padding: 9px 12px;
  border: 1px solid var(--rust-soft);
  border-radius: var(--r-sm);
  background: #fff;
  color: var(--rust);
  font-size: 12px;
}
.message-body {
  width: 100%;
  min-height: 360px;
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
}
.message-body pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-family: var(--mono);
  font-size: 12.5px;
  line-height: 1.6;
}

/* ---------- Empty / muted ---------- */
.empty,
.muted {
  font-family: var(--serif);
  font-style: italic;
  color: var(--ink-4);
  font-size: 14px;
}
.muted { font-size: 12.5px; }

/* ---------- Responsive ---------- */
@media (max-width: 1100px) {
  .console-layout,
  .console-layout.with-reader { grid-template-columns: 200px 1fr; }
  .folders-panel { display: none; }
}
@media (max-width: 760px) {
  .console-layout,
  .console-layout.with-reader { grid-template-columns: 1fr; }
  .topbar { flex-direction: column; align-items: flex-start; }
  .brand h1 { font-size: 40px; }
}

/* ---------- Login page form (kept compatible) ---------- */
.hero { text-align: left; }
.badge {
  display: inline-flex;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--ink-3);
  padding: 0;
  background: transparent;
  font-weight: 500;
}
.login-form {
  display: flex;
  gap: 8px;
  margin-top: 22px;
  flex-wrap: wrap;
}
.login-form input { max-width: 320px; }
.profile { margin-top: 18px; font-weight: 600; }
.note { font-size: 12px; color: var(--ink-3); }