/* =====================================================
   MAYA CHEN — WILDLIFE PHOTOGRAPHY
   Design System & Global Styles
   ===================================================== */

/* ---------- Google Fonts Import ---------- */
@import url('https://fonts.googleapis.com/css2?family=Cormorant+Garamond:ital,wght@0,300;0,400;0,600;1,300;1,400&family=Jost:wght@300;400;500&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  /* Palette */
  --clr-bg:        #F9F6F0;
  --clr-surface:   #FFFFFF;
  --clr-ink:       #1C1814;
  --clr-ink-muted: #7A6F63;
  --clr-accent:    #B87333;   /* warm copper */
  --clr-accent-lt: #E8D5BE;
  --clr-border:    #E2DBD0;

  /* Typography */
  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Jost', sans-serif;

  /* Spacing scale */
  --sp-xs:  0.5rem;
  --sp-sm:  1rem;
  --sp-md:  2rem;
  --sp-lg:  4rem;
  --sp-xl:  7rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  --dur:      0.45s;

  /* Misc */
  --radius:  4px;
  --shadow:  0 4px 30px rgba(28,24,20,.07);
  --shadow-lg: 0 16px 60px rgba(28,24,20,.13);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
img  { display: block; max-width: 100%; height: auto; }
a    { color: inherit; text-decoration: none; }
ul   { list-style: none; }
button { cursor: pointer; border: none; background: transparent; }

/* ---------- Base ---------- */
body {
  font-family: var(--font-body);
  background: var(--clr-bg);
  color: var(--clr-ink);
  line-height: 1.7;
  font-weight: 300;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

/* ---------- Typography Helpers ---------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 300;
  line-height: 1.15;
}
.serif { font-family: var(--font-display); }

.eyebrow {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--clr-accent);
}

/* ---------- Navigation ---------- */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.4rem var(--sp-md);
  transition: background var(--dur) var(--ease-out),
              box-shadow var(--dur) var(--ease-out);
}
.site-nav.scrolled {
  background: rgba(249,246,240,.93);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 1px 0 var(--clr-border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--clr-ink);
}
.nav-logo span { color: var(--clr-accent); }

.nav-links {
  display: flex;
  gap: var(--sp-md);
  align-items: center;
}
.nav-links a {
  font-size: 0.78rem;
  font-weight: 400;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-ink);
  position: relative;
  padding-bottom: 2px;
  transition: color var(--dur) var(--ease-out);
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--clr-accent);
  transition: width var(--dur) var(--ease-out);
}
.nav-links a:hover,
.nav-links a.active { color: var(--clr-accent); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }

/* Hamburger (mobile) */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 1px;
  background: var(--clr-ink);
  transition: transform var(--dur) var(--ease-out), opacity var(--dur);
}

/* ---------- Mobile Nav ---------- */
@media (max-width: 700px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    inset: 0;
    flex-direction: column;
    justify-content: center;
    gap: 2.5rem;
    background: var(--clr-bg);
    font-size: 1.1rem;
    transform: translateY(-100%);
    transition: transform var(--dur) var(--ease-out);
    pointer-events: none;
    z-index: 99;
  }
  .nav-links.open {
    transform: translateY(0);
    pointer-events: all;
  }
  .nav-links a {
    font-size: 1rem;
  }
  .site-nav.menu-open .nav-toggle span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }
  .site-nav.menu-open .nav-toggle span:nth-child(2) {
    opacity: 0;
  }
  .site-nav.menu-open .nav-toggle span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 0.85rem 2.4rem;
  font-family: var(--font-body);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  transition: background var(--dur) var(--ease-out),
              color var(--dur) var(--ease-out),
              transform 0.2s;
}
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--clr-ink);
  color: var(--clr-bg);
  border: 1.5px solid var(--clr-ink);
}
.btn-primary:hover {
  background: var(--clr-accent);
  border-color: var(--clr-accent);
}

.btn-outline {
  background: transparent;
  color: var(--clr-ink);
  border: 1.5px solid var(--clr-ink);
}
.btn-outline:hover {
  background: var(--clr-ink);
  color: var(--clr-bg);
}

.btn-ghost {
  background: transparent;
  color: var(--clr-bg);
  border: 1.5px solid rgba(249,246,240,0.6);
}
.btn-ghost:hover {
  background: rgba(249,246,240,0.12);
  border-color: rgba(249,246,240,0.9);
}

/* ---------- Page Header (inner pages) ---------- */
.page-header {
  padding: calc(var(--sp-xl) + 2rem) var(--sp-md) var(--sp-lg);
  text-align: center;
  border-bottom: 1px solid var(--clr-border);
}
.page-header h1 {
  font-size: clamp(3rem, 7vw, 5.5rem);
  margin-top: 0.6rem;
}
.page-header p {
  margin-top: 1rem;
  color: var(--clr-ink-muted);
  font-size: 1.05rem;
  max-width: 480px;
  margin-inline: auto;
}

/* ---------- Section Container ---------- */
.container {
  max-width: 1240px;
  margin-inline: auto;
  padding-inline: var(--sp-md);
}

/* ---------- Divider ---------- */
.divider {
  width: 48px;
  height: 1px;
  background: var(--clr-accent);
  margin-block: 1.4rem;
}
.divider.center { margin-inline: auto; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--clr-ink);
  color: rgba(249,246,240,.55);
  padding: var(--sp-lg) var(--sp-md) var(--sp-md);
}
.footer-inner {
  max-width: 1240px;
  margin-inline: auto;
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--sp-md);
  padding-bottom: var(--sp-md);
  border-bottom: 1px solid rgba(249,246,240,.08);
}
.footer-brand .nav-logo {
  color: rgba(249,246,240,.85);
  font-size: 1.6rem;
}
.footer-brand p {
  margin-top: 0.8rem;
  font-size: 0.82rem;
  line-height: 1.7;
}
.footer-col h4 {
  font-family: var(--font-body);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: rgba(249,246,240,.35);
  margin-bottom: 1rem;
}
.footer-col ul { display: flex; flex-direction: column; gap: 0.55rem; }
.footer-col a {
  font-size: 0.85rem;
  transition: color 0.25s;
}
.footer-col a:hover { color: var(--clr-accent); }

.footer-social {
  display: flex;
  gap: 1.1rem;
  margin-top: 1rem;
}
.footer-social a {
  width: 36px; height: 36px;
  border: 1px solid rgba(249,246,240,.15);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.85rem;
  transition: border-color 0.25s, color 0.25s;
}
.footer-social a:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.footer-bottom {
  max-width: 1240px;
  margin-inline: auto;
  padding-top: 1.4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.75rem;
  flex-wrap: wrap;
  gap: 0.5rem;
}

@media (max-width: 700px) {
  .footer-inner { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ---------- Fade-in animation ---------- */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Utilities ---------- */
.text-muted  { color: var(--clr-ink-muted); }
.text-accent { color: var(--clr-accent); }
.text-center { text-align: center; }
.mt-sm { margin-top: var(--sp-sm); }
.mt-md { margin-top: var(--sp-md); }
.mt-lg { margin-top: var(--sp-lg); }