/* ============================================================
   Base — reset, typography, nav, footer
   ============================================================ */

@import url("https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&family=DM+Serif+Display:ital@0;1&display=swap");

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, video {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3, h4 {
  color: var(--color-text);
  line-height: 1.2;
  font-weight: 600;
}

h1 { font-size: clamp(2rem, 5vw, 3.25rem); }
h2 { font-size: clamp(1.5rem, 3.5vw, 2.25rem); }
h3 { font-size: 1.25rem; }

p {
  color: var(--color-text-muted);
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--duration) var(--easing);
}

a:hover { color: var(--color-link-hover); }

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ----------  Layout  ---------- */

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--size-5);
}

.section {
  padding: var(--size-10) 0;
}

/* ----------  Navigation  ---------- */

.site-nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(252, 252, 254, .85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

@media (prefers-color-scheme: dark) {
  .site-nav {
    background: rgba(15, 17, 23, .85);
  }
}

.site-nav__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--size-4) var(--size-5);
}

.site-nav__brand {
  font-weight: 600;
  font-size: 1.05rem;
  color: var(--color-text);
}

.site-nav__brand:hover {
  color: var(--color-accent-1);
}

.site-nav__links {
  display: flex;
  gap: var(--size-5);
  list-style: none;
}

.site-nav__links a {
  color: var(--color-text-muted);
  font-size: .95rem;
  font-weight: 500;
  padding: var(--size-1) var(--size-2);
  border-radius: var(--radius-sm);
  transition: color var(--duration) var(--easing);
}

.site-nav__links a:hover,
.site-nav__links a[aria-current="page"] {
  color: var(--color-accent-1);
}

.site-nav__toggle {
  display: none;
  width: 32px;
  height: 32px;
  flex-direction: column;
  justify-content: space-around;
}

.site-nav__toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-text);
  border-radius: 2px;
  transition: transform var(--duration) var(--easing);
}

@media (max-width: 720px) {
  .site-nav__links {
    position: fixed;
    inset: 64px 0 auto 0;
    flex-direction: column;
    gap: 0;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: var(--size-3);
    transform: translateY(-110%);
    transition: transform var(--duration) var(--easing);
  }
  .site-nav__links.open {
    transform: translateY(0);
  }
  .site-nav__links a {
    display: block;
    padding: var(--size-3);
  }
  .site-nav__toggle {
    display: flex;
  }
}

/* ----------  Footer  ---------- */

.site-footer {
  margin-top: var(--size-12);
  padding: var(--size-8) var(--size-5) var(--size-6);
  background: var(--color-surface-alt);
  border-top: 1px solid var(--color-border);
}

.site-footer__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--size-5);
}

.site-footer__links {
  list-style: none;
  display: flex;
  gap: var(--size-5);
  flex-wrap: wrap;
}

.site-footer__links a {
  color: var(--color-text-muted);
  font-size: .9rem;
}

.site-footer__meta {
  color: var(--color-text-subtle);
  font-size: .85rem;
}