:root {
  --bg: #f6f8fb;
  --panel: #ffffff;
  --ink: #182033;
  --muted: #667085;
  --line: #d9e1ec;
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --accent: #0f766e;
  --danger: #c4362e;
  --shadow: 0 12px 32px rgba(21, 32, 50, 0.08);
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: Arial, Helvetica, sans-serif;
  font-size: 15px;
  letter-spacing: 0;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

button,
input,
select,
textarea {
  font: inherit;
}

input,
select,
textarea {
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  min-height: 38px;
  padding: 8px 10px;
  width: 100%;
}

textarea {
  resize: vertical;
}

button,
.primary-button,
.secondary-button,
.ghost-button,
.text-button,
.danger-button {
  align-items: center;
  border: 0;
  border-radius: 6px;
  cursor: pointer;
  display: inline-flex;
  justify-content: center;
  min-height: 36px;
  padding: 8px 12px;
  text-decoration: none;
  white-space: nowrap;
}

.primary-button {
  background: var(--primary);
  color: #fff;
}

.primary-button:hover {
  background: var(--primary-dark);
  text-decoration: none;
}

.secondary-button {
  background: #e7f0ff;
  color: var(--primary-dark);
}

.ghost-button {
  background: #eef2f7;
  color: var(--ink);
}

.text-button,
.danger-button {
  background: transparent;
  padding: 4px 2px;
}

.danger-button {
  color: var(--danger);
}

.login-body,
.public-body {
  min-height: 100vh;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(15, 118, 110, 0.12)),
    var(--bg);
}

.login-body {
  display: grid;
  place-items: center;
}

.login-shell {
  padding: 24px;
  width: min(100%, 430px);
}

.login-panel,
.tool-form,
.file-surface,
.backup-panel,
.handoff-surface,
.metric-strip,
.public-panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.login-panel,
.public-panel {
  padding: 28px;
}

.brand-mark {
  align-items: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 6px;
  color: #fff;
  display: inline-flex;
  font-weight: 800;
  height: 44px;
  justify-content: center;
  width: 44px;
}

.brand-mark.small {
  height: 32px;
  width: 32px;
}

.login-panel h1,
.public-panel h1 {
  font-size: 28px;
  margin: 16px 0 4px;
}

.stack-form {
  display: grid;
  gap: 14px;
  margin-top: 20px;
}

.stack-form label,
.tool-form label {
  color: var(--muted);
  display: grid;
  font-size: 13px;
  font-weight: 700;
  gap: 6px;
}

.check-line {
  align-items: center;
  display: flex !important;
  flex-direction: row;
  gap: 8px;
}

.check-line input {
  min-height: 0;
  width: auto;
}

.topbar {
  align-items: center;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  display: flex;
  justify-content: space-between;
  min-height: 64px;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 5;
}

.brand,
.top-actions {
  align-items: center;
  display: flex;
  gap: 10px;
}

.brand {
  color: var(--ink);
  font-weight: 800;
}

.brand:hover {
  text-decoration: none;
}

.top-actions {
  flex-wrap: wrap;
  justify-content: flex-end;
}

.top-actions form {
  margin: 0;
}

.app-shell,
.message-strip {
  margin: 0 auto;
  max-width: 1320px;
  padding: 24px;
}

.message-strip {
  padding-bottom: 0;
}

.notice {
  border-radius: 6px;
  margin: 0 0 10px;
  padding: 10px 12px;
}

.notice.success {
  background: #e7f6ef;
  color: var(--accent);
}

.notice.error {
  background: #fdebea;
  color: var(--danger);
}

.workspace-head {
  align-items: flex-start;
  display: flex;
  gap: 16px;
  justify-content: space-between;
  margin-bottom: 18px;
}

.workspace-head h1 {
  font-size: 26px;
  margin: 6px 0 0;
}

.breadcrumbs {
  align-items: center;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
}

.metric-strip {
  display: grid;
  gap: 14px;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  margin: 18px 0;
  padding: 14px;
}

.metric-strip > div {
  display: grid;
  gap: 4px;
}

.label {
  color: var(--muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
}

.tool-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(260px, 1fr));
  margin: 18px 0;
}

.tool-form {
  display: grid;
  gap: 12px;
  padding: 16px;
}

.tool-form h2 {
  font-size: 18px;
  margin: 0;
}

.form-grid {
  display: grid;
  gap: 12px;
  grid-template-columns: repeat(3, minmax(120px, 1fr));
}

.content-grid {
  align-items: start;
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(0, 1fr) 360px;
}

.side-stack {
  display: grid;
  gap: 18px;
}

.section-head {
  align-items: center;
  border-bottom: 1px solid var(--line);
  display: flex;
  gap: 12px;
  justify-content: space-between;
  padding: 14px 16px;
}

.section-head h2 {
  font-size: 16px;
  margin: 0;
}

.muted {
  color: var(--muted);
}

.table-wrap {
  overflow-x: auto;
}

.file-table {
  border-collapse: collapse;
  min-width: 860px;
  width: 100%;
}

.file-table th,
.file-table td {
  border-bottom: 1px solid var(--line);
  padding: 12px 16px;
  text-align: left;
  vertical-align: top;
}

.file-table th {
  color: var(--muted);
  font-size: 12px;
  text-transform: uppercase;
}

.inline-controls {
  align-items: center;
  display: flex;
  gap: 8px;
}

.empty-cell {
  color: var(--muted);
  padding: 28px 16px;
  text-align: center;
}

.plain-list {
  display: grid;
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 14px 16px;
}

.plain-list li {
  display: grid;
  gap: 4px;
}

.plain-list span {
  color: var(--muted);
  font-size: 13px;
}

code {
  background: #eef2f7;
  border-radius: 4px;
  padding: 2px 4px;
}

.handoff-surface {
  display: grid;
  gap: 12px;
  line-height: 1.5;
  padding: 20px;
}

.handoff-surface h2 {
  font-size: 18px;
  margin: 14px 0 0;
}

.handoff-surface h2:first-child {
  margin-top: 0;
}

.handoff-surface pre {
  background: #101828;
  border-radius: 8px;
  color: #f8fafc;
  overflow-x: auto;
  padding: 14px;
}

.handoff-surface pre code {
  background: transparent;
  padding: 0;
}

.public-shell {
  display: grid;
  gap: 18px;
  grid-template-columns: minmax(320px, 620px) minmax(260px, 360px);
  margin: 0 auto;
  max-width: 1080px;
  padding: 32px 18px;
}

.public-shell.single {
  grid-template-columns: minmax(320px, 620px);
  justify-content: center;
}

.public-panel.compact {
  align-self: start;
}

@media (max-width: 1000px) {
  .tool-grid,
  .content-grid,
  .metric-strip,
  .public-shell {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .topbar,
  .workspace-head,
  .top-actions,
  .inline-controls {
    align-items: stretch;
    flex-direction: column;
  }

  .topbar {
    gap: 10px;
    padding: 12px;
  }

  .app-shell,
  .message-strip {
    padding-left: 12px;
    padding-right: 12px;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }
}

.help-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.help-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 18px;
}

.help-nav a {
  background: #eef6f6;
  border: 1px solid #c8dddd;
  border-radius: 7px;
  color: var(--accent-strong);
  font-weight: 800;
  padding: 8px 10px;
}

.help-grid {
  display: grid;
  gap: 16px;
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.help-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
}

.help-card h2 {
  color: var(--deep);
  font-size: 1rem;
  margin: 0 0 10px;
}

.help-card ol,
.help-card ul {
  color: var(--ink);
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 20px;
}

.help-callout {
  background: #f7fbfb;
  border-left: 4px solid var(--accent);
  margin-top: 16px;
  padding: 14px 16px;
}

@media (max-width: 780px) {
  .help-grid {
    grid-template-columns: 1fr;
  }

  .help-nav a {
    flex: 1 1 150px;
    text-align: center;
  }
}

/* AIBiz topbar contrast guard: keeps header actions readable through theme/color updates. */
:root {
  --aibiz-topbar-button-bg: var(--surface, var(--panel, #ffffff));
  --aibiz-topbar-button-text: var(--deep, var(--ink, #17202a));
  --aibiz-topbar-button-hover-bg: color-mix(in srgb, var(--accent, var(--primary, #0e7c7b)) 12%, var(--surface, #ffffff));
  --aibiz-topbar-button-hover-text: var(--accent-strong, var(--primary-dark, var(--primary, #0a5f66)));
  --aibiz-topbar-button-border: var(--line, #d9e2e7);
}

.topbar .ghost-button {
  background: var(--aibiz-topbar-button-bg);
  border-color: var(--aibiz-topbar-button-border);
  color: var(--aibiz-topbar-button-text);
  text-decoration: none;
  text-shadow: none;
  transition: border-color 120ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.topbar .ghost-button:hover,
.topbar .ghost-button:focus-visible {
  background: var(--aibiz-topbar-button-hover-bg);
  border-color: var(--accent, var(--primary, #0e7c7b));
  color: var(--aibiz-topbar-button-hover-text);
  text-decoration: none;
}

.topbar .ghost-button:visited {
  color: var(--aibiz-topbar-button-text);
}

.topbar .ghost-button:hover:visited {
  color: var(--aibiz-topbar-button-hover-text);
}