:root {
  --bg: #f3f4f6;
  --panel: #ffffff;
  --panel-muted: #f8fafc;
  --ink: #111827;
  --muted: #6b7280;
  --line: #d1d5db;
  --accent: #1f2937;
  --accent-soft: #e5e7eb;
  --success: #e8f5ed;
  --error: #fdebec;
  --shadow: 0 10px 28px rgba(15, 23, 42, 0.05);
  --radius: 16px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Sans", "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.5;
}

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

button,
.button-link {
  appearance: none;
  border: 1px solid var(--accent);
  border-radius: 12px;
  padding: 0.85rem 1.2rem;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  font: inherit;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.ghost-button {
  background: var(--panel);
  border: 1px solid var(--line);
  color: var(--ink);
}

input,
textarea,
select {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 0.8rem 0.95rem;
  font: inherit;
  background: var(--panel);
  color: var(--ink);
}

input:focus,
textarea:focus,
select:focus {
  outline: 0;
  border-color: #94a3b8;
  box-shadow: 0 0 0 3px rgba(148, 163, 184, 0.18);
}

textarea,
pre {
  min-height: 120px;
  white-space: pre-wrap;
  word-break: break-word;
}

label {
  display: block;
  margin: 0;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--muted);
}

.checkbox {
  display: flex;
  gap: 0.65rem;
  align-items: flex-start;
  color: var(--ink);
}

.checkbox input {
  width: auto;
}

.shell {
  display: grid;
  grid-template-columns: 240px 1fr;
  min-height: 100vh;
}

.sidebar {
  padding: 2rem;
  border-right: 1px solid var(--line);
  background: var(--panel);
}

.brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
  margin-bottom: 2rem;
}

.brand-mark {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.brand-title {
  font-size: 1rem;
  font-weight: 700;
}

.brand-subtitle {
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.nav {
  display: grid;
  gap: 0.35rem;
  margin-bottom: 1.5rem;
}

.nav a {
  padding: 0.75rem 0.85rem;
  border-radius: 10px;
  color: var(--ink);
  border: 1px solid transparent;
}

.nav a:hover {
  background: var(--panel-muted);
  border-color: var(--line);
}

.content {
  padding: 2rem;
  max-width: 1440px;
}

.page-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  align-items: end;
  margin-bottom: 1.25rem;
}

.page-header h1 {
  margin: 0;
  font-size: 2rem;
  letter-spacing: -0.03em;
}

.page-header p {
  margin: 0.35rem 0 0;
  color: var(--muted);
  max-width: 720px;
}

.stats-grid,
.form-grid {
  display: grid;
  gap: 1rem;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.settings-layout {
  display: grid;
  gap: 1rem;
  max-width: 980px;
}

.settings-form {
  display: grid;
  gap: 1rem;
}

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

.settings-grid-span {
  grid-column: 1 / -1;
}

.settings-summary {
  background: var(--panel-muted);
}

.summary-list {
  display: grid;
  gap: 0.85rem;
}

.summary-row {
  display: grid;
  gap: 0.35rem;
}

.summary-row span {
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 600;
}

.diagnostics-card {
  display: grid;
  gap: 1rem;
}

.diagnostic-list {
  display: grid;
  gap: 0.85rem;
}

.diagnostic-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem 1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: var(--panel-muted);
}

.diagnostic-copy {
  min-width: 0;
  display: grid;
  gap: 0.35rem;
}

.diagnostic-copy strong,
.diagnostic-call h3 {
  font-size: 0.98rem;
}

.diagnostic-meta {
  min-width: min(100%, 360px);
  display: grid;
  justify-items: end;
  gap: 0.55rem;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: var(--panel);
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.status-ok {
  background: #ecfdf3;
  border-color: #b7e4c7;
}

.status-warn {
  background: #fff7e8;
  border-color: #f4c97d;
}

.status-missing {
  background: #fdebec;
  border-color: #f1b7bd;
}

.diagnostic-call {
  display: grid;
  gap: 0.9rem;
  padding-top: 0.25rem;
}

.diagnostic-call-header {
  display: flex;
  justify-content: space-between;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.diagnostic-call-header h3 {
  margin: 0;
}

.diagnostic-message {
  margin: 0;
  padding: 0.95rem 1rem;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: var(--panel-muted);
}

.diagnostic-ok {
  background: #ecfdf3;
  border-color: #b7e4c7;
}

.diagnostic-warn {
  background: #fff7e8;
  border-color: #f4c97d;
}

.readonly-box,
code {
  display: block;
  width: 100%;
  padding: 0.85rem 0.95rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--panel-muted);
  color: var(--ink);
  font-family: "IBM Plex Mono", "SFMono-Regular", Consolas, monospace;
  font-size: 0.93rem;
  overflow-wrap: anywhere;
}

.stat-card,
.card {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 1.4rem;
  box-shadow: var(--shadow);
}

.card > h2,
.card > h3 {
  margin: 0 0 1rem;
  font-size: 1.05rem;
}

.stat-card span {
  color: var(--muted);
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.stat-card strong {
  display: block;
  margin-top: 0.35rem;
  font-size: 1.85rem;
  letter-spacing: -0.03em;
}

.form-actions {
  grid-column: 1 / -1;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

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

.card-form,
.auth-form {
  display: grid;
  gap: 1rem;
}

.field {
  display: grid;
  gap: 0.45rem;
}

.field-note {
  color: var(--muted);
  font-size: 0.9rem;
  margin: 0;
}

.button-row,
.inline-form {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
  margin-top: 1rem;
}

.preview-controls {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}

.voice-player {
  width: 100%;
  min-height: 3rem;
}

.button-row form,
.inline-form form {
  margin: 0;
}

.table-wrap {
  overflow-x: auto;
  width: 100%;
}

table {
  width: 100%;
  border-collapse: collapse;
  min-width: 720px;
}

th,
td {
  text-align: left;
  padding: 0.85rem 0.65rem;
  border-bottom: 1px solid var(--accent-soft);
  vertical-align: top;
}

th {
  color: var(--muted);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.badge {
  display: inline-flex;
  padding: 0.28rem 0.65rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--ink);
  font-size: 0.82rem;
  font-weight: 600;
}

.flash-stack {
  display: grid;
  gap: 0.7rem;
  margin-bottom: 1rem;
}

.flash {
  padding: 0.9rem 1rem;
  border-radius: 12px;
  border: 1px solid var(--line);
}

.flash-success {
  background: var(--success);
}

.flash-error {
  background: var(--error);
}

.auth-body {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 2rem;
  background: var(--bg);
}

.auth-card {
  width: min(100%, 460px);
  padding: 2rem;
  border-radius: 18px;
  background: var(--panel);
  box-shadow: var(--shadow);
  border: 1px solid var(--line);
}

.auth-card h1 {
  margin: 0 0 0.5rem;
  letter-spacing: -0.03em;
}

.auth-card p {
  margin: 0 0 1.25rem;
  color: var(--muted);
}

.timeline {
  display: grid;
  gap: 1rem;
}

.timeline-item {
  padding-left: 1rem;
  border-left: 3px solid var(--accent-soft);
  min-width: 0;
}

.timeline-meta,
.hint {
  color: var(--muted);
  font-size: 0.9rem;
}

.section-stack {
  display: grid;
  gap: 1rem;
}

.code-block {
  background: var(--panel-muted);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 1rem;
}

.settings-helper {
  margin-top: 0;
}

.danger {
  border-color: rgba(185, 28, 28, 0.16);
}

@media (max-width: 900px) {
  .shell {
    grid-template-columns: 1fr;
  }

  .sidebar {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .page-header {
    flex-direction: column;
    align-items: start;
  }

  .content {
    padding: 1.25rem;
  }

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

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

  .diagnostic-row,
  .diagnostic-call-header {
    flex-direction: column;
    align-items: stretch;
  }

  .diagnostic-meta {
    min-width: 0;
    justify-items: stretch;
  }

  table {
    min-width: 640px;
  }
}