*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "Inter", system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
}

h1, h2, h3 {
  font-weight: 600;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

a {
  color: inherit;
}

.container {
  width: min(1100px, 100% - var(--space-4));
  margin-inline: auto;
}

.site-header {
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-weight: 700;
  font-size: 1.125rem;
  letter-spacing: -0.02em;
  text-decoration: none;
}

.nav {
  display: flex;
  gap: var(--space-3);
  align-items: center;
}

.hero {
  padding: var(--space-6) 0;
  text-align: center;
}

.hero__title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 700;
  margin: 0 0 var(--space-3);
  max-width: 18ch;
  margin-inline: auto;
}

.hero__subtitle {
  font-size: 1.125rem;
  color: var(--color-text-muted);
  max-width: 42ch;
  margin: 0 auto var(--space-5);
}

.hero__actions {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.features {
  padding: var(--space-6) 0;
}

.features__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-4);
}

.site-footer {
  padding: var(--space-5) 0;
  border-top: 1px solid var(--color-border);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 14px;
}

.app-header {
  background: var(--color-inverse);
  color: var(--color-primary);
  padding: var(--space-3) 0;
  border-bottom: 1px solid var(--color-border);
}

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

.app-header .logo {
  color: var(--color-primary);
}

.app-header .btn-ghost {
  color: var(--color-primary);
  border-color: var(--color-border-strong);
}

.app-header .btn-ghost:hover {
  background: var(--color-bg-muted);
  color: var(--color-primary);
}

.app-main {
  padding: var(--space-5) 0;
}

/* ── Brief page ───────────────────── */

.brief-container {
  width: min(600px, 100% - var(--space-4) * 2);
  margin-inline: auto;
}

.brief-intro {
  margin-bottom: var(--space-4);
}

.brief-intro__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 6px;
}

.brief-intro__sub {
  color: var(--color-text-muted);
  font-size: 15px;
  margin: 0;
}

.wizard-nav {
  display: flex;
  gap: var(--space-2);
  margin-top: var(--space-4);
  justify-content: space-between;
  align-items: center;
}

.wizard-nav #primary-btn {
  margin-left: auto;
}

/* ── Dashboard page ───────────────── */

.dashboard-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: var(--space-5);
  padding-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.dashboard-header__title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 4px;
}

.dashboard-header__sub {
  font-size: 14px;
  margin: 0;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-3);
}

.dashboard-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.dashboard-card__icon {
  font-size: 1.25rem;
  color: var(--color-text-muted);
  margin-bottom: 4px;
}

.dashboard-card__title {
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: -0.02em;
  margin: 0;
}

.dashboard-card__footer {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin: var(--space-1) 0;
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--space-4);
}

.social-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.social-card__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-2);
}

.social-fallback {
  margin-top: var(--space-2);
  font-size: 14px;
  color: var(--color-text-muted);
}

.social-fallback summary {
  cursor: pointer;
  margin-bottom: var(--space-2);
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--color-text-muted);
  cursor: pointer;
}

.checkbox-label input {
  margin-top: 4px;
}

@media (max-width: 640px) {
  .hero {
    padding: var(--space-5) 0;
  }

  .wizard-nav {
    flex-direction: row;
  }

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