/* ══════════════════════════════════════════
   NERDWHISTLE.COM — main.css
   Based on Nerdwhistle design system:
   Light default, Barlow Condensed headings,
   Inter body, #c0392b accent
   ══════════════════════════════════════════ */

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

/* ── VARIABLES — LIGHT (default) ── */
:root {
  --black:  #f0f0eb;
  --dark:   #e6e6e1;
  --mid:    #d8d8d3;
  --border: #c4c4bf;
  --white:  #0c0c0a;
  --muted:  #5a5a54;
  --accent: #c0392b;
}

/* ── VARIABLES — DARK ── */
body.dark {
  --black:  #080808;
  --dark:   #111111;
  --mid:    #1a1a1a;
  --border: #2a2a2a;
  --white:  #f5f5f0;
  --muted:  #888880;
  --accent: #c0392b;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: 'Inter', sans-serif;
  font-weight: 300;
  letter-spacing: 0.01em;
  overflow-x: hidden;
}

/* ── NAV ── */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  height: 70px;
  background: rgba(240,240,235,0.97);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: border-color 0.3s ease, background 0.3s ease;
}

body.dark nav {
  background: rgba(8,8,8,0.96);
}

.nav-logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--white);
  text-decoration: none;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  line-height: 1;
}

.nav-tagline {
  font-family: 'Inter', sans-serif;
  font-size: 0.48rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
  color: var(--accent);
  display: block;
  line-height: 1;
  white-space: nowrap;
  margin-top: 5px;
}

/* ── HAMBURGER BUTTON ── */
.nav-hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px 4px;
  margin-left: auto;
}

.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  transition: transform 0.25s ease, opacity 0.2s ease;
}

.nav-hamburger.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.nav-hamburger.open span:nth-child(2) {
  opacity: 0;
}
.nav-hamburger.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.nav-logo .mustache {
  height: 22px;
  width: auto;
  filter: invert(1);
  opacity: 0.9;
}

body.light .nav-logo .mustache { filter: invert(0); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  transition: color 0.2s ease;
  position: relative;
}

.nav-links a:hover,
.nav-links a.active { color: var(--white); }

/* Photography dropdown */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  display: none;
  position: absolute;
  top: calc(100% + 16px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--dark);
  border: 1px solid var(--border);
  min-width: 180px;
  z-index: 300;
  padding: 0.5rem 0;
}

.nav-dropdown:hover .nav-dropdown-menu { display: block; }

.nav-dropdown-menu a {
  display: block;
  padding: 0.6rem 1.25rem;
  color: var(--muted);
  font-size: 0.63rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  white-space: nowrap;
}

.nav-dropdown-menu a:hover { color: var(--white); background: var(--mid); }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  color: var(--muted);
  cursor: pointer;
  padding: 0.35rem 0.75rem;
  font-size: 0.62rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  font-family: 'Inter', sans-serif;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.theme-toggle:hover { color: var(--white); border-color: var(--white); }

/* ── UTILITIES ── */
.no-break { white-space: nowrap; }

/* ── INTRO SECTION ── */
.intro {
  padding: 150px 3rem 3.5rem;
  text-align: center;
}

.intro-headline {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(3rem, 7vw, 6.5rem);
  font-weight: 700;
  color: var(--white);
  line-height: 1.0;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  max-width: 1100px;
  margin: 0 auto;
}

.intro-headline .hl-dim {
  color: var(--muted);
  font-weight: 700;
}

/* ── PORTFOLIO SECTION ── */
.portfolio-section {
  padding: 1rem 3rem 6rem;
}

.section-header {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.section-label {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--accent);
}

.section-count {
  font-size: 0.6rem;
  letter-spacing: 0.15em;
  color: var(--muted);
}

/* ── PORTFOLIO GRID — masonry flex columns ── */
.portfolio-grid {
  display: flex;
  gap: 35px;
  align-items: flex-start;
}

.portfolio-col {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 35px;
}

/* ── PORTFOLIO TILE ── */
.portfolio-tile {
  position: relative;
  overflow: hidden;
  border-radius: 14px;
  display: block;
  aspect-ratio: 16 / 9;
  background: var(--mid);
  text-decoration: none;
}

/* Portrait (tall) tile variation */
.portfolio-tile.tile-tall {
  aspect-ratio: 3 / 4;
}

.portfolio-tile img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform 0.55s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              filter 0.4s ease;
  filter: brightness(0.88);
}

.portfolio-tile:hover img {
  transform: scale(1.04);
  filter: brightness(1.0);
}

.tile-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top,
    rgba(8,8,8,0.82) 0%,
    rgba(8,8,8,0.25) 50%,
    rgba(8,8,8,0) 100%);
  opacity: 0;
  transition: opacity 0.35s ease;
  display: flex;
  align-items: flex-end;
  padding: 1rem 1.1rem;
  pointer-events: none;
}

.portfolio-tile:hover .tile-overlay { opacity: 1; }

.tile-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: 0.9rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #f5f5f0;
  line-height: 1.2;
  transform: translateY(5px);
  transition: transform 0.35s ease;
}

.portfolio-tile:hover .tile-title { transform: translateY(0); }

/* ── PROJECT PAGE ── */
.project-page {
  padding-top: 70px;
  min-height: 100vh;
}

.project-header {
  padding: 4rem 3rem 2.5rem;
  max-width: 900px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.62rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
  margin-bottom: 2.5rem;
  transition: color 0.2s ease;
}

.back-link:hover { color: var(--accent); }

.back-link::before {
  content: '←';
  font-size: 0.75rem;
}

.project-title {
  font-family: 'Barlow Condensed', sans-serif;
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: -0.01em;
  line-height: 1.0;
  color: var(--white);
  margin-bottom: 1.25rem;
}

.project-desc {
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--muted);
  line-height: 1.8;
  max-width: 680px;
}

/* ── VIDEO EMBEDS ── */
.video-stack {
  padding: 0 3rem 5rem;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 2.5rem;
}

.video-label {
  font-size: 0.6rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

.video-wrap {
  position: relative;
  padding-bottom: 56.25%; /* 16:9 */
  height: 0;
  overflow: hidden;
  border-radius: 10px;
  background: var(--mid);
}

.video-wrap iframe {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

/* ── FOOTER ── */
footer {
  background: var(--dark);
  border-top: 1px solid var(--border);
  padding: 2.5rem 3rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-logo {
  font-family: 'Barlow Condensed', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  text-decoration: none;
}

.footer-copy {
  font-size: 0.6rem;
  letter-spacing: 0.1em;
  color: var(--muted);
}

/* ── NO-IMAGE FALLBACK ── */
.portfolio-tile.no-thumb {
  background: var(--mid);
}

.portfolio-tile.no-thumb .tile-overlay {
  opacity: 1;
  background: linear-gradient(to top, rgba(8,8,8,0.85) 0%, rgba(8,8,8,0.45) 100%);
}

.portfolio-tile.no-thumb .tile-title {
  transform: translateY(0);
  font-size: 1rem;
}

/* In light mode, no-thumb tiles look better with a slightly different treatment */
body:not(.dark) .portfolio-tile.no-thumb .tile-overlay {
  background: linear-gradient(to top, rgba(20,20,20,0.88) 0%, rgba(20,20,20,0.5) 100%);
}

/* ── DIVIDER ── */
.divider {
  width: 36px;
  height: 2px;
  background: var(--accent);
  margin: 1.5rem 0;
}

/* ── RESPONSIVE — TABLET (≤960px) ── */
@media (max-width: 960px) {
  .portfolio-grid { gap: 20px; }
  .portfolio-col:nth-child(3) { display: none; }
  nav { padding: 0 1.5rem; }
  .intro { padding: 130px 2rem 2.5rem; }
  .intro-headline { font-size: clamp(2.2rem, 5.5vw, 3.5rem); }
  .portfolio-section { padding: 1rem 1.5rem 4rem; }
  .project-header { padding: 3rem 1.5rem 2rem; }
  .video-stack { padding: 0 1.5rem 3rem; }
  footer { padding: 2rem 1.5rem; }
}

/* ── RESPONSIVE — MOBILE (≤700px) — hamburger nav ── */
@media (max-width: 700px) {
  /* Show hamburger, hide nav links by default */
  .nav-hamburger { display: flex; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 70px;
    left: 0; right: 0;
    background: var(--black);
    border-bottom: 1px solid var(--border);
    padding: 0.5rem 1.5rem 1.25rem;
    gap: 0;
    z-index: 199;
  }

  .nav-links.open { display: flex; }

  .nav-links > li {
    border-bottom: 1px solid var(--border);
  }
  .nav-links > li:last-child { border-bottom: none; }

  .nav-links a {
    display: block;
    padding: 0.85rem 0;
    font-size: 0.72rem;
  }

  /* Theme toggle — full-width row in dropdown */
  .nav-links .theme-toggle {
    width: 100%;
    text-align: left;
    border: none;
    padding: 0.85rem 0;
    font-size: 0.72rem;
    background: none;
  }

  /* Photography sub-links — show inline, indented */
  .nav-dropdown-menu {
    display: block !important;
    position: static;
    transform: none;
    background: none;
    border: none;
    padding: 0 0 0.5rem 1rem;
    min-width: unset;
  }

  .nav-dropdown-menu a {
    font-size: 0.64rem;
    padding: 0.45rem 0;
    color: var(--muted);
  }

  /* Single column */
  .portfolio-col:nth-child(2),
  .portfolio-col:nth-child(3) { display: none; }

  .intro { padding: 110px 1.25rem 2rem; }
  .intro-headline { font-size: clamp(2rem, 10vw, 2.8rem); }
  .portfolio-section { padding: 1rem 1.25rem 3rem; }
  footer { flex-direction: column; gap: 0.75rem; text-align: center; }
}