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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.55;
  color: var(--color-ivory);
  background: var(--color-navy);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color 0.3s ease, color 0.3s ease;
}

img,
svg {
  display: block;
  max-width: 100%;
}

a {
  color: inherit;
  text-decoration: none;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

h1,
h2,
h3,
h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.1;
  margin: 0 0 var(--space-3);
  letter-spacing: -0.02em;
}

p {
  margin: 0 0 var(--space-4);
}

p:last-child {
  margin-bottom: 0;
}

ul,
ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

.container {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  backdrop-filter: blur(14px);
  background: var(--nav-bg);
  border-bottom: 1px solid var(--border);
}

.site-nav__inner {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.brand-mark {
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: var(--text-lg);
  letter-spacing: -0.03em;
}

.brand-mark span {
  color: var(--color-coral);
}

.site-nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-5);
}

.site-nav__links a {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-ivory-dim);
  transition: color 0.2s ease;
}

.site-nav__links a:hover,
.site-nav__links a.is-active {
  color: var(--color-ivory);
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-pill);
  background: transparent;
  color: var(--color-ivory);
  cursor: pointer;
  transition: border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
  flex-shrink: 0;
}

.theme-toggle:hover {
  border-color: var(--color-aqua);
  background: rgba(30, 200, 200, 0.1);
  transform: translateY(-1px);
}

.theme-toggle svg {
  width: 1.15rem;
  height: 1.15rem;
}

.theme-toggle__sun,
.theme-toggle__moon {
  grid-area: 1 / 1;
}

html[data-theme="light"] .theme-toggle__sun {
  display: none;
}

html:not([data-theme="light"]) .theme-toggle__moon {
  display: none;
}

.nav-toggle {
  display: none;
  width: 2.5rem;
  height: 2.5rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  padding: 0;
  place-items: center;
}

.nav-toggle span {
  display: block;
  width: 1.1rem;
  height: 2px;
  background: var(--color-ivory);
  position: relative;
}

.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--color-ivory);
}

.nav-toggle span::before {
  top: -6px;
}

.nav-toggle span::after {
  top: 6px;
}

.site-footer {
  padding: var(--space-7) 0;
  border-top: 1px solid var(--border);
  color: var(--color-ivory-mute);
  font-size: var(--text-sm);
}

.site-footer__inner {
  width: min(100% - 2rem, var(--container));
  margin-inline: auto;
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  justify-content: space-between;
  align-items: center;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--dur) var(--ease-out),
    transform var(--dur) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

.reveal-delay-1 {
  transition-delay: 0.08s;
}
.reveal-delay-2 {
  transition-delay: 0.16s;
}
.reveal-delay-3 {
  transition-delay: 0.24s;
}
.reveal-delay-4 {
  transition-delay: 0.32s;
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(120%);
  z-index: 100;
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius-pill);
  background: var(--color-navy-mid);
  border: 1px solid rgba(30, 200, 200, 0.4);
  color: var(--color-ivory);
  font-size: var(--text-sm);
  font-weight: 600;
  box-shadow: var(--shadow-soft);
  transition: transform 0.35s var(--ease-out);
  pointer-events: none;
}

.toast.is-show {
  transform: translateX(-50%) translateY(0);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: grid;
  }

  .site-nav__links {
    position: fixed;
    inset: var(--nav-h) 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: var(--space-4);
    background: var(--menu-bg);
    border-bottom: 1px solid var(--border);
    transform: translateY(-120%);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.3s var(--ease-out), opacity 0.3s ease;
  }

  .site-nav__links.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .site-nav__links a {
    padding: 0.85rem 0.5rem;
    border-bottom: 1px solid var(--border-soft);
  }
}