* {
  box-sizing: border-box;
}

:root {
  --color-primary: #2563eb;
  --color-primary-soft: #dbeafe;
  --color-text: #0f172a;
  --color-subtle: #475569;
  --color-border: #cbd5e1;
  --color-surface: #f8fafc;
  --color-success: #166534;
  --color-success-bg: #dcfce7;
  --color-warning: #92400e;
  --color-warning-bg: #fef3c7;
  --color-danger: #991b1b;
  --color-danger-bg: #fee2e2;
}

html {
  font-size: 16px;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--color-text);
  font-family: -apple-system, "Hiragino Sans", sans-serif;
  line-height: 1.6;
}

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

a:hover {
  text-decoration: underline;
}

button,
.button,
.button-secondary,
.button-ghost,
input,
select,
textarea {
  font: inherit;
}

button,
.button,
.button-secondary,
.button-ghost {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-primary);
  border-radius: 10px;
  background: var(--color-primary);
  color: #ffffff;
  cursor: pointer;
  padding: 0.75rem 1rem;
  text-decoration: none;
}

button:disabled,
.button:disabled,
.button-secondary:disabled,
.button-ghost:disabled {
  cursor: not-allowed;
  opacity: 0.65;
}

.button-secondary,
.button-ghost {
  background: #ffffff;
  color: var(--color-primary);
}

.button-ghost {
  border-color: var(--color-border);
  color: var(--color-text);
}

input,
select,
textarea {
  width: 100%;
  border: 1px solid var(--color-border);
  border-radius: 10px;
  background: #ffffff;
  color: var(--color-text);
  padding: 0.75rem 0.875rem;
}

textarea {
  min-height: 140px;
  resize: vertical;
}

label {
  display: block;
  font-weight: 600;
  margin-bottom: 0.4rem;
}

.page {
  width: min(960px, calc(100% - 2rem));
  margin: 0 auto;
  padding: 1.25rem 0 3rem;
}

.topbar {
  border-bottom: 1px solid var(--color-border);
  background: #ffffff;
}

.topbar-inner {
  width: min(1120px, calc(100% - 2rem));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  border-radius: 8px;
  background: var(--color-primary);
  color: #ffffff;
  font-weight: 800;
}

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

.hero {
  padding: 3rem 0 2rem;
}

.hero h1 {
  margin: 0 0 0.75rem;
  font-size: clamp(2rem, 4vw, 3.25rem);
  line-height: 1.15;
}

.hero p {
  margin: 0;
  color: var(--color-subtle);
  font-size: 1.05rem;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.section {
  margin-top: 2rem;
}

.section h2 {
  margin: 0 0 1rem;
  font-size: 1.4rem;
}

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

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

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.card {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: #ffffff;
  padding: 1rem;
}

.card h3,
.card h4 {
  margin-top: 0;
  margin-bottom: 0.5rem;
}

.feature-card p,
.plan-card p {
  margin: 0;
  color: var(--color-subtle);
}

.plan-price {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 0.5rem 0;
}

.tag-row,
.button-row,
.inline-row,
.form-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.form-grid {
  align-items: flex-end;
}

.field {
  margin-bottom: 1rem;
}

.field:last-child {
  margin-bottom: 0;
}

.status {
  border-radius: 12px;
  padding: 0.85rem 1rem;
  margin-bottom: 1rem;
}

.status-info {
  background: var(--color-primary-soft);
  color: #1d4ed8;
}

.status-success {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.status-warning {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

.status-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
}

.hidden {
  display: none !important;
}

.auth-shell {
  max-width: 560px;
  margin: 3rem auto;
}

.app-layout {
  width: min(1200px, calc(100% - 2rem));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  gap: 1rem;
  padding: 1rem 0 2rem;
}

.sidebar {
  border: 1px solid var(--color-border);
  border-radius: 16px;
  background: var(--color-surface);
  padding: 0.75rem;
  height: fit-content;
  position: sticky;
  top: 1rem;
}

.sidebar button {
  width: 100%;
  justify-content: flex-start;
  text-align: left;
  margin-bottom: 0.5rem;
}

.sidebar button:last-child {
  margin-bottom: 0;
}

.sidebar button.active {
  background: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}

.sidebar button:not(.active) {
  background: #ffffff;
  color: var(--color-text);
  border-color: var(--color-border);
}

.panel-stack {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
}

.list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.list-item {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  padding: 0.85rem;
  background: #ffffff;
}

.list-item.active {
  border-color: var(--color-primary);
  background: #eff6ff;
}

.list-item h4,
.list-item h5,
.list-item p {
  margin: 0;
}

.list-item button {
  margin-top: 0.75rem;
}

.meta {
  color: var(--color-subtle);
  font-size: 0.92rem;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.stat-box {
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  padding: 1rem;
}

.stat-box strong {
  display: block;
  font-size: 1.6rem;
  margin-top: 0.35rem;
}

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

.content-box {
  border: 1px solid var(--color-border);
  border-radius: 12px;
  background: #ffffff;
  padding: 1rem;
}

.content-box pre {
  margin: 0;
  white-space: pre-wrap;
  word-break: break-word;
  font-family: inherit;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  border-radius: 999px;
  background: var(--color-primary-soft);
  color: #1d4ed8;
  padding: 0.2rem 0.7rem;
  font-size: 0.9rem;
}

.pill-neutral {
  background: #e2e8f0;
  color: #334155;
}

.footer {
  border-top: 1px solid var(--color-border);
  margin-top: 3rem;
  padding-top: 1rem;
  color: var(--color-subtle);
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.empty {
  color: var(--color-subtle);
  padding: 1rem 0;
}

.link-box {
  border: 1px dashed var(--color-border);
  border-radius: 12px;
  background: var(--color-surface);
  padding: 0.85rem;
  word-break: break-all;
}

.report-header {
  padding: 2rem 0 1rem;
}

.report-callout {
  margin-top: 1rem;
  border: 1px solid var(--color-border);
  border-radius: 14px;
  background: var(--color-surface);
  padding: 1rem;
}

@media (max-width: 900px) {
  .grid-3,
  .grid-2,
  .compare-grid,
  .stat-grid,
  .app-layout {
    grid-template-columns: 1fr;
  }

  .sidebar {
    position: static;
  }
}