/* Base, layout and typography — built on tokens.css */

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 15px;
  line-height: 1.55;
  overflow-x: hidden;
}

a { color: var(--accent); }
h1, h2, h3, h4 { text-wrap: balance; font-weight: 600; margin: 0 0 var(--space-2); }
p { margin: 0 0 var(--space-3); }

.eyebrow {
  font-size: .75rem;
  font-weight: 600;
  letter-spacing: .04em;
  text-transform: uppercase;
  color: var(--text-secondary);
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; animation: none !important; }
}

.icon {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  flex-shrink: 0;
}

/* ---------- App shell layout ---------- */

.app-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  padding: 0 var(--space-4);
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}

.app-header .wordmark {
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
  letter-spacing: -.01em;
}

.app-header .wordmark span { color: var(--accent); }

.app-main {
  flex: 1;
  width: 100%;
  padding: var(--space-5) var(--space-4) calc(var(--nav-height) + var(--space-6));
}

.page-content {
  width: 100%;
  max-width: 640px;
  margin: 0 auto;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: var(--space-1);
}

.page-subtitle {
  color: var(--text-secondary);
  font-size: .9375rem;
  margin-bottom: var(--space-6);
}

/* ---------- Navigation: bottom tab bar (mobile) / sidebar (desktop) ---------- */

.app-nav {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 30;
  display: flex;
  flex-direction: column;
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding-bottom: env(safe-area-inset-bottom, 0);
}

.nav-brand,
.nav-footer {
  display: none;
}

.nav-links {
  display: flex;
}

.nav-links a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--space-2) 0 var(--space-3);
  text-decoration: none;
  color: var(--text-tertiary);
  font-size: .6875rem;
  font-weight: 600;
}

.nav-links a.active { color: var(--accent); }
.nav-links a .icon { width: 22px; height: 22px; }

@media (min-width: 768px) {
  .app-shell { flex-direction: row; }

  .app-header { display: none; }

  .app-nav {
    position: fixed;
    top: 0;
    bottom: 0;
    left: 0;
    right: auto;
    width: var(--sidebar-width);
    flex-direction: column;
    border-top: none;
    border-right: 1px solid var(--border);
    padding: var(--space-5) var(--space-4);
    padding-bottom: var(--space-4);
  }

  .nav-brand {
    display: block;
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -.01em;
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-5);
  }

  .nav-brand span { color: var(--accent); }

  .nav-links {
    flex: 1;
    flex-direction: column;
    gap: var(--space-1);
    align-items: stretch;
    min-height: 0;
    overflow-y: auto;
  }

  .nav-links a {
    flex: none;
    flex-direction: row;
    justify-content: flex-start;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius-md);
    font-size: .875rem;
    font-weight: 600;
    color: var(--text-secondary);
  }

  .nav-links a:hover { background: var(--accent-soft); color: var(--accent); }
  .nav-links a.active { background: var(--accent-soft); color: var(--accent); }
  .nav-links a .icon { width: 20px; height: 20px; }

  .nav-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-2);
    padding: var(--space-3);
    margin-top: var(--space-3);
    border-top: 1px solid var(--border);
  }

  .nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    min-width: 0;
    font-size: .8125rem;
    font-weight: 600;
    color: var(--text-secondary);
  }

  .nav-user span { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .nav-user .icon { width: 16px; height: 16px; color: var(--text-tertiary); }

  .nav-logout-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-sm);
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
  }

  .nav-logout-btn:hover { color: var(--critical); background: var(--critical-soft); }
  .nav-logout-btn .icon { width: 18px; height: 18px; }

  .app-main {
    margin-left: var(--sidebar-width);
    display: flex;
    justify-content: center;
    padding: 0;
  }

  .page-content {
    max-width: var(--content-max-width);
    padding: var(--space-8);
  }

  .page-title { font-size: 1.875rem; }
  .page-subtitle { font-size: 1rem; }
}

/* ---------- Auth screens ---------- */

.auth-screen {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-5);
}

.auth-card {
  width: 100%;
  max-width: 360px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-7) var(--space-6);
}

.auth-card .wordmark {
  display: block;
  text-align: center;
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: var(--space-1);
  text-decoration: none;
}

.auth-card .wordmark span { color: var(--accent); }

.auth-card .tagline {
  text-align: center;
  color: var(--text-secondary);
  font-size: .875rem;
  margin-bottom: var(--space-6);
}