/* ============================================
   COMPONENTS — Nav, Footer, Phone, Sticky CTA, Buttons
   ============================================ */

/* === NAVIGATION === */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: calc(var(--nav-height-mobile) + env(safe-area-inset-top, 0px));
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: env(safe-area-inset-top, 0px) max(var(--space-6), env(safe-area-inset-right, 0px)) 0 max(var(--space-6), env(safe-area-inset-left, 0px));
  background: transparent;
  z-index: 1000;
  transition: background var(--duration-base) var(--ease-out),
              border-color var(--duration-base) var(--ease-out),
              box-shadow var(--duration-base) var(--ease-out);
  border-bottom: 1px solid transparent;
}

.site-nav.scrolled {
  background: var(--canvas);
  border-bottom-color: var(--frame);
  box-shadow: 0 1px 8px rgba(0, 0, 0, 0.04);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--ink);
  z-index: 1001;
}

.nav-links {
  display: none;
  list-style: none;
  gap: var(--space-8);
  align-items: center;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--slate);
  transition: color var(--duration-fast) var(--ease-out);
}

.nav-links a:hover {
  color: var(--ink);
}

.nav-links .btn {
  margin-left: var(--space-4);
}

/* Hamburger */
.nav-menu-btn {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  z-index: 1001;
}

.nav-menu-btn span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 1px;
  transition: transform var(--duration-base) var(--ease-out),
              opacity var(--duration-fast) var(--ease-out);
}

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

.nav-menu-btn.open span:nth-child(2) {
  opacity: 0;
}

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

/* Mobile menu overlay */
.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: var(--canvas);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-8);
  padding: env(safe-area-inset-top, 0px) env(safe-area-inset-right, 0px) env(safe-area-inset-bottom, 0px) env(safe-area-inset-left, 0px);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--duration-base) var(--ease-out);
}

.mobile-menu-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.mobile-menu-overlay a {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--ink);
}

/* === BUTTONS === */

.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  transition: transform var(--duration-fast) var(--ease-out),
              background var(--duration-fast) var(--ease-out),
              box-shadow var(--duration-fast) var(--ease-out);
  text-decoration: none;
  line-height: 1;
}

.btn:hover {
  transform: scale(1.03);
}

.btn--primary {
  background: var(--ink);
  color: var(--canvas);
}

.btn--primary:hover {
  background: var(--charcoal);
  box-shadow: 0 4px 16px rgba(15, 20, 25, 0.2);
}

.btn--ghost {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--frame);
}

.btn--ghost:hover {
  border-color: var(--moulding);
  background: var(--linen);
}

.btn--large {
  font-size: var(--text-base);
  padding: var(--space-4) var(--space-8);
}

.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
}

/* === PHONE MOCKUP === */

.phone-mockup {
  width: min(260px, 70vw);
  aspect-ratio: 1 / 2;
  background: var(--ink);
  border-radius: 40px;
  padding: 10px;
  position: relative;
  box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12),
              0 8px 16px rgba(0, 0, 0, 0.08);
  flex-shrink: 0;
}

.phone-mockup__notch {
  position: absolute;
  top: 10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 24px;
  background: var(--ink);
  border-radius: 0 0 16px 16px;
  z-index: 2;
}

.phone-mockup__screen {
  width: 100%;
  height: 100%;
  background: var(--canvas);
  border-radius: 30px;
  overflow: hidden;
  position: relative;
}

.phone-mockup__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-4);
  background: linear-gradient(180deg, var(--linen) 0%, var(--surface) 100%);
  padding: var(--space-8);
}

.phone-mockup__placeholder-logo {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--ink);
}

.phone-mockup__placeholder-label {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fog);
  text-align: center;
}

/* Float animation for hero phone */
@keyframes phone-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.phone-mockup--float {
  animation: phone-float 4s var(--ease-out) infinite;
}

@media (prefers-reduced-motion: reduce) {
  .phone-mockup--float {
    animation: none;
  }
}

/* === STICKY CTA BAR === */

.sticky-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--sticky-bar-height) + env(safe-area-inset-bottom, 0px));
  background: var(--canvas);
  border-top: 1px solid var(--frame);
  box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-6);
  padding: 0 max(var(--space-6), env(safe-area-inset-right, 0px)) env(safe-area-inset-bottom, 0px) max(var(--space-6), env(safe-area-inset-left, 0px));
  z-index: 900;
  opacity: 0;
  transform: translateY(100%);
  transition: opacity var(--duration-base) var(--ease-out),
              transform var(--duration-base) var(--ease-out);
  pointer-events: none;
}

.sticky-cta.visible {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

.sticky-cta__text {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fog);
  display: none;
}

/* === FOOTER === */

.site-footer {
  background: var(--linen);
  border-top: 1px solid var(--frame);
  padding: var(--space-16) 0 var(--space-8);
}

.footer-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-10);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: var(--space-8);
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.footer-brand__name {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 500;
  color: var(--ink);
}

.footer-brand__sub {
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  color: var(--fog);
}

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

.footer-nav a {
  font-size: var(--text-sm);
  color: var(--slate);
  transition: color var(--duration-fast) var(--ease-out);
}

.footer-nav a:hover {
  color: var(--ink);
}

.footer-badge {
  display: inline-flex;
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--sky-deep);
  background: var(--sky-whisper);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-full);
  align-self: flex-start;
}

.footer-bottom {
  padding-top: var(--space-8);
  border-top: 1px solid var(--frame);
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  font-size: var(--text-xs);
  color: var(--fog);
}

.footer-bottom a {
  color: var(--sky-deep);
}

.footer-bottom a:hover {
  text-decoration: underline;
}

/* === ARTIFACT GRID === */

.artifact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
  margin-top: var(--space-8);
}

.artifact-grid__item {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-3);
  background: var(--linen);
  border-radius: var(--radius-md);
  border: 1px solid var(--frame);
}

.artifact-grid__icon {
  font-size: var(--text-base);
  line-height: 1;
  flex-shrink: 0;
}

.artifact-grid__label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--charcoal);
}

.artifact-grid__arrow {
  font-family: var(--font-mono);
  font-size: 9px;
  color: var(--fog);
  flex-shrink: 0;
}

/* === RESPONSIVE COMPONENTS === */

@media (min-width: 768px) {
  .site-nav {
    height: var(--nav-height);
    padding: 0 var(--space-10);
  }

  .nav-links {
    display: flex;
  }

  .nav-menu-btn {
    display: none;
  }

  .mobile-menu-overlay {
    display: none;
  }

  .phone-mockup {
    width: 300px;
  }

  .sticky-cta__text {
    display: block;
  }

  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }

  .footer-nav {
    flex-direction: row;
    gap: var(--space-6);
  }

  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }

}

@media (min-width: 1024px) {
  .site-nav {
    padding: 0 var(--space-16);
  }

}