/* ── Navigation ─────────────────────────────────────── */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(26, 26, 26, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  height: 56px;
}

.site-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-back {
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--text-secondary);
  transition: color 0.2s;
  white-space: nowrap;
}

.nav-back:hover {
  color: var(--text-primary);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
}

.nav-brand img {
  width: 24px;
  height: 24px;
  border-radius: 6px;
}

.nav-brand span {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
}

.nav-apps-toggle {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-secondary);
  padding: 6px 12px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  transition: border-color 0.2s, color 0.2s;
  white-space: nowrap;
}

.nav-apps-toggle:hover {
  border-color: var(--border-hover);
  color: var(--text-primary);
}

.nav-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  right: var(--content-pad-x);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 8px;
  min-width: 260px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: opacity 0.2s, transform 0.2s, visibility 0.2s;
}

.nav-dropdown.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 8px;
  transition: background 0.2s;
}

.nav-dropdown-item:hover {
  background: rgba(245, 240, 232, 0.05);
}

.nav-dropdown-item img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.nav-dropdown-item-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  display: block;
}

.nav-dropdown-item-desc {
  font-size: 0.75rem;
  color: var(--text-tertiary);
  display: block;
}

/* Mobile nav */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
}

.nav-hamburger span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: transform 0.2s, opacity 0.2s;
}

.nav-hamburger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.nav-hamburger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-panel {
  position: fixed;
  top: 56px;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--asphalt);
  z-index: 99;
  padding: 32px var(--content-pad-x);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s, visibility 0.25s;
}

.mobile-panel.open {
  opacity: 1;
  visibility: visible;
}

.mobile-panel a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.125rem;
}

.mobile-panel a img {
  width: 40px;
  height: 40px;
  border-radius: 10px;
}

@media (max-width: 639px) {
  .nav-apps-toggle,
  .nav-dropdown {
    display: none;
  }

  .nav-hamburger {
    display: flex;
  }
}

@media (min-width: 640px) {
  .nav-hamburger,
  .mobile-panel {
    display: none !important;
  }
}

/* ── Buttons ───────────────────────────────────────── */

.btn-appstore {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: var(--text-primary);
  color: var(--asphalt);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-btn);
  transition: transform 0.2s, box-shadow 0.2s;
}

.btn-appstore:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 20px rgba(245, 240, 232, 0.15);
}

.btn-appstore svg {
  width: 20px;
  height: 20px;
}

.btn-notify {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  border: 1px solid var(--border-hover);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.9375rem;
  border-radius: var(--radius-btn);
  transition: border-color 0.2s, background 0.2s;
}

.btn-notify:hover {
  border-color: var(--warm-accent);
  background: rgba(245, 240, 232, 0.05);
}

.btn-notify svg {
  width: 18px;
  height: 18px;
}

/* ── App Cards (homepage) ──────────────────────────── */

.app-card {
  display: block;
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 32px;
  position: relative;
  transition: box-shadow 0.3s, transform 0.2s;
  overflow: hidden;
}

.app-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  width: 3px;
}

.app-card--run::before { background: var(--signal-red); }
.app-card--ride::before { background: var(--signal-green); }
.app-card--walk::before { background: var(--signal-amber); }

.app-card:hover {
  transform: translateY(-2px);
}

.app-card--run:hover {
  box-shadow: 0 0 40px var(--signal-red-glow), 0 8px 32px rgba(0,0,0,0.3);
}

.app-card--ride:hover {
  box-shadow: 0 0 40px var(--signal-green-glow), 0 8px 32px rgba(0,0,0,0.3);
}

.app-card--walk:hover {
  box-shadow: 0 0 40px var(--signal-amber-glow), 0 8px 32px rgba(0,0,0,0.3);
}

.app-card-header {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 16px;
}

.app-card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  flex-shrink: 0;
}

.app-card-name {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  margin-bottom: 4px;
}

.app-card-diff {
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

.app-card-tag {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 10px;
  border-radius: 4px;
  display: inline-block;
  margin-top: 20px;
}

.app-card--run .app-card-tag {
  color: var(--signal-red);
  background: var(--signal-red-glow);
}

.app-card--ride .app-card-tag {
  color: var(--signal-green);
  background: var(--signal-green-glow);
}

.app-card--walk .app-card-tag {
  color: var(--signal-amber);
  background: var(--signal-amber-glow);
}

.app-card-link {
  display: block;
  margin-top: 20px;
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 0.875rem;
  color: var(--warm-accent);
  transition: color 0.2s;
}

.app-card-link:hover {
  color: var(--warm-accent-hover);
}

@media (max-width: 639px) {
  .app-card::before {
    top: 0;
    left: 0;
    right: 0;
    bottom: auto;
    width: auto;
    height: 3px;
  }
}

/* ── Blog Cards ────────────────────────────────────── */

.blog-card {
  display: block;
  padding: 20px 24px;
  border-left: 3px solid var(--border);
  transition: border-color 0.2s, background 0.2s;
  border-radius: 0 var(--radius-btn) var(--radius-btn) 0;
}

.blog-card:hover {
  background: rgba(245, 240, 232, 0.03);
}

.blog-card-date {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: 6px;
}

.blog-card-title {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 4px;
}

.blog-card-excerpt {
  font-size: 0.875rem;
  color: var(--text-tertiary);
  line-height: 1.5;
}

/* Signal-colored blog card borders per app */
.page--run .blog-card { border-left-color: var(--signal-red); }
.page--ride .blog-card { border-left-color: var(--signal-green); }
.page--walk .blog-card { border-left-color: var(--signal-amber); }

/* ── FAQ ───────────────────────────────────────────── */

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-question {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  padding: 20px 0;
  color: var(--text-primary);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq-question::after {
  content: '+';
  font-family: var(--font-mono);
  font-size: 1.25rem;
  color: var(--text-tertiary);
  transition: transform 0.2s;
  flex-shrink: 0;
  margin-left: 16px;
}

details[open] .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 20px;
  font-size: 0.9375rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-answer a {
  color: var(--warm-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── Spec Grid ─────────────────────────────────────── */

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 24px;
}

.spec-label {
  font-family: var(--font-mono);
  font-size: 0.6875rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  display: block;
  margin-bottom: 4px;
}

.spec-value {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 1rem;
  color: var(--text-primary);
}

/* ── Footer ────────────────────────────────────────── */

.site-footer {
  padding: 48px 0;
  border-top: 1px solid var(--border);
}

.site-footer .container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.875rem;
  color: var(--text-primary);
}

.footer-icons {
  display: flex;
  gap: 16px;
}

.footer-icons a {
  display: block;
  transition: transform 0.2s;
}

.footer-icons a:hover {
  transform: scale(1.1);
}

.footer-icons img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
  transition: box-shadow 0.2s;
}

.footer-icons a:nth-child(1) img:hover {
  box-shadow: 0 0 16px var(--signal-red-glow);
}

.footer-icons a:nth-child(2) img:hover {
  box-shadow: 0 0 16px var(--signal-green-glow);
}

.footer-icons a:nth-child(3) img:hover {
  box-shadow: 0 0 16px var(--signal-amber-glow);
}

.footer-links {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-links a {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
  transition: color 0.2s;
}

.footer-links a:hover {
  color: var(--text-primary);
}

.footer-copy {
  font-size: 0.75rem;
  color: var(--text-tertiary);
}

.footer-email {
  font-size: 0.8125rem;
  color: var(--text-tertiary);
}

.footer-email a {
  color: var(--warm-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ── Scroll Reveal ─────────────────────────────────── */

.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}