/* ===========================================================
   HORIZONS — Bahram Khan Photography
   Design tokens
   =========================================================== */
:root{
  --ink: #0a0d10;
  --ink-2: #0f1317;
  --panel: #151a1f;
  --panel-2: #1b2127;
  --line: rgba(232,230,225,0.10);
  --line-strong: rgba(232,230,225,0.22);
  --text: #eae7e0;
  --text-muted: #9aa1a6;
  --text-dim: #6b7278;
  --amber: #c9915b;
  --amber-soft: #e0b284;
  --steel: #6d8a9a;
  --steel-soft: #9db8c4;

  --font-display: "Fraunces", "Iowan Old Style", Georgia, serif;
  --font-body: "Inter", -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Menlo, monospace;

  --container: 1240px;
  --gutter: clamp(20px, 5vw, 64px);
}

*,*::before,*::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  background: var(--ink);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: inherit; text-decoration:none; }
h1,h2,h3,h4{ font-family: var(--font-display); font-weight: 600; margin:0; letter-spacing: -0.01em; }
p{ margin:0; }
ul{ list-style:none; margin:0; padding:0; }
button{ font-family:inherit; cursor:pointer; }

.container{
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

/* Focus visibility */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 1.5px solid var(--amber-soft);
  outline-offset: 3px;
}

/* ===========================================================
   Eyebrow / mono label utility — flight-log styling
   =========================================================== */
.mono-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-dim);
}
.mono-label .accent{ color: var(--amber-soft); }

/* ===========================================================
   Header / Nav
   =========================================================== */
.site-header{
  position: fixed;
  top:0; left:0; right:0;
  z-index: 100;
  padding: 22px 0;
  transition: background .4s ease, border-color .4s ease, padding .3s ease;
  border-bottom: 1px solid transparent;
}
.site-header.is-scrolled{
  background: rgba(10,13,16,0.86);
  backdrop-filter: blur(10px);
  border-bottom-color: var(--line);
  padding: 14px 0;
}
.site-header .container{
  display:flex;
  align-items:center;
  justify-content:space-between;
}
.brand{
  font-family: var(--font-display);
  font-size: 1.15rem;
  letter-spacing: 0.02em;
  display:flex;
  flex-direction:column;
  line-height:1.1;
}
.brand .brand-sub{
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.22em;
  color: var(--text-dim);
  margin-top: 3px;
}
.nav-links{
  display:flex;
  gap: clamp(18px, 3vw, 40px);
}
.nav-links a{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  position:relative;
  padding: 4px 0;
}
.nav-links a::after{
  content:"";
  position:absolute; left:0; right:0; bottom:0;
  height:1px; background: var(--amber-soft);
  transform: scaleX(0); transform-origin: left;
  transition: transform .3s ease;
}
.nav-links a:hover::after,
.nav-links a[aria-current="page"]::after{ transform: scaleX(1); }
.nav-links a[aria-current="page"]{ color: var(--text); }

.nav-toggle{
  display:none;
  background:none; border:none; color:var(--text);
  width: 32px; height: 22px; position: relative;
}
.nav-toggle span, .nav-toggle::before, .nav-toggle::after{
  content:""; position:absolute; left:0; right:0; height:1px; background: var(--text);
  transition: transform .3s ease, opacity .3s ease;
}
.nav-toggle::before{ top:0; }
.nav-toggle span{ top:50%; transform: translateY(-50%); }
.nav-toggle::after{ bottom:0; }

@media (max-width: 760px){
  .nav-links{
    position: fixed; inset: 0 0 0 30%;
    background: var(--ink-2);
    flex-direction: column;
    justify-content:center;
    align-items:flex-start;
    gap: 28px;
    padding: 40px var(--gutter);
    transform: translateX(100%);
    transition: transform .4s ease;
    border-left: 1px solid var(--line);
  }
  .nav-links.is-open{ transform: translateX(0); }
  .nav-links a{ font-size: 0.9rem; }
  .nav-toggle{ display:block; z-index: 110; }
}

/* ===========================================================
   Hero — horizon signature
   =========================================================== */
.hero{
  position: relative;
  min-height: 82svh;
  display:flex;
  flex-direction: column;
  justify-content:flex-start;
  overflow:hidden;
  background:
    radial-gradient(120% 90% at 50% 0%, #182029 0%, var(--ink) 55%),
    linear-gradient(180deg, var(--ink) 0%, #0d1114 60%, #0a0d10 100%);
}
.hero::before{
  /* faint grain */
  content:"";
  position:absolute; inset:0;
  opacity:0.05;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
  pointer-events:none;
}
.hero-horizon{
  position: relative;
  z-index: 1;
  flex: 0 0 auto;
  width: 100%;
  height: 1px;
  margin-bottom: clamp(64px, 14vh, 160px);
  background: linear-gradient(90deg, transparent 0%, var(--amber-soft) 20%, var(--amber) 50%, var(--amber-soft) 80%, transparent 100%);
  transform: scaleX(0);
  transform-origin: center;
  animation: draw-horizon 1.8s cubic-bezier(.22,.9,.28,1) 0.3s forwards;
}
.hero-horizon::after{
  content:"";
  position:absolute; left:50%; top:50%;
  width: 24px; height:24px; border-radius:50%;
  background: var(--amber-soft);
  transform: translate(-50%,-50%);
  box-shadow: 0 0 36px 8px rgba(201,145,91,0.45);
}
@keyframes draw-horizon{ to{ transform: scaleX(1); } }

.hero-content{
  position:relative;
  z-index:2;
  padding-bottom: clamp(56px, 10vh, 120px);
  width:100%;
}
.hero-eyebrow{
  margin-bottom: 18px;
}
.hero-title{
  font-size: clamp(3rem, 9vw, 6.4rem);
  line-height: 0.96;
  color: var(--text);
}
.hero-title em{
  font-style: italic;
  color: var(--amber-soft);
}
.hero-tagline{
  margin-top: 22px;
  max-width: 520px;
  color: var(--text-muted);
  font-size: 1.05rem;
}
.hero-coords{
  margin-top: 40px;
  display:flex; gap: 28px; flex-wrap:wrap;
}

@media (prefers-reduced-motion: reduce){
  .hero-horizon{ animation: none; transform: scaleX(1); }
}

/* ===========================================================
   Section scaffolding
   =========================================================== */
.section{
  padding: clamp(64px, 11vw, 140px) 0;
  border-top: 1px solid var(--line);
}
.section-head{
  display:flex;
  justify-content:space-between;
  align-items:flex-end;
  gap: 24px;
  margin-bottom: clamp(36px, 6vw, 64px);
  flex-wrap: wrap;
}
.section-title{
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
}
.section-desc{
  max-width: 480px;
  color: var(--text-muted);
}

/* ===========================================================
   Category strip (home)
   =========================================================== */
.category-strip{
  display:grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.category-strip a{
  padding: 22px var(--gutter);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform:uppercase;
  color: var(--text-muted);
  border-right: 1px solid var(--line);
  text-align:center;
  transition: color .25s ease, background .25s ease;
}
.category-strip a:last-child{ border-right:none; }
.category-strip a:hover{ color: var(--text); background: var(--panel); }
@media (max-width: 760px){
  .category-strip{ grid-template-columns: repeat(2,1fr); }
  .category-strip a:nth-child(2){ border-right:none; }
}

/* ===========================================================
   Gallery grid + flight-log captions (signature element)
   =========================================================== */
.gallery{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 2px;
  background: var(--line);
}
.frame{
  background: var(--ink);
  position:relative;
  overflow:hidden;
}
.frame-img{
  aspect-ratio: 4/3;
  overflow:hidden;
  position:relative;
}
.frame-img img{
  width:100%; height:100%; object-fit:cover;
  transition: transform .6s cubic-bezier(.2,.7,.2,1), filter .6s ease;
  filter: saturate(0.92) brightness(0.95);
}
.frame:hover .frame-img img{ transform: scale(1.045); filter: saturate(1) brightness(1); }
.frame-log{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 12px;
  padding: 12px 16px;
  background: var(--panel);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  text-transform: uppercase;
  border-top: 1px solid var(--line);
}
.frame-log .fl-title{ color: var(--text-muted); }
.frame.featured{ grid-column: span 2; }
@media (max-width: 640px){ .frame.featured{ grid-column: span 1; } }

/* ===========================================================
   Buttons / links
   =========================================================== */
.btn{
  display:inline-flex;
  align-items:center;
  gap: 10px;
  padding: 14px 26px;
  border: 1px solid var(--line-strong);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  transition: border-color .25s ease, background .25s ease, transform .25s ease;
}
.btn:hover{ border-color: var(--amber-soft); background: var(--panel); }
.btn-solid{
  background: var(--amber-soft);
  color: #14100b;
  border-color: var(--amber-soft);
}
.btn-solid:hover{ background: var(--amber); border-color: var(--amber); }
.arrow{ transition: transform .25s ease; }
.btn:hover .arrow{ transform: translateX(4px); }

/* ===========================================================
   About teaser (home) + about page
   =========================================================== */
.split{
  display:grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(32px, 6vw, 90px);
  align-items:center;
}
@media (max-width: 860px){ .split{ grid-template-columns: 1fr; } }

.stat-row{
  display:grid;
  grid-template-columns: repeat(3, auto);
  gap: clamp(24px, 5vw, 56px);
  margin-top: 36px;
}
@media (max-width: 560px){ .stat-row{ grid-template-columns: 1fr 1fr; } }
.stat{
  border-top: 1px solid var(--line-strong);
  padding-top: 12px;
}
.stat-num{
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  color: var(--amber-soft);
}
.stat-label{
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-top: 4px;
}

/* Timeline (about page) — flight-log entries, not numbered markers */
.logbook{
  border-top: 1px solid var(--line);
}
.logbook-entry{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
@media (max-width: 640px){ .logbook-entry{ grid-template-columns: 1fr; gap:6px; } }
.logbook-entry .lb-date{
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--amber-soft);
  letter-spacing: 0.06em;
}
.logbook-entry h4{ font-size: 1.15rem; margin-bottom: 6px; }
.logbook-entry p{ color: var(--text-muted); }

/* Gear list */
.gear-grid{
  display:grid;
  grid-template-columns: repeat(auto-fit, minmax(220px,1fr));
  gap: 1px;
  background: var(--line);
  margin-top: 8px;
}
.gear-item{
  background: var(--ink);
  padding: 20px 22px;
}
.gear-item .mono-label{ margin-bottom: 6px; }

/* ===========================================================
   Tabs (work page)
   =========================================================== */
.tabs{
  display:flex;
  gap: clamp(16px, 3vw, 36px);
  flex-wrap:wrap;
  border-bottom: 1px solid var(--line);
  margin-bottom: 2px;
}
.tab{
  background:none; border:none;
  padding: 10px 0 16px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-dim);
  border-bottom: 2px solid transparent;
  margin-bottom: -1px;
  transition: color .2s ease, border-color .2s ease;
}
.tab:hover{ color: var(--text-muted); }
.tab.is-active{ color: var(--text); border-color: var(--amber-soft); }
.gallery-panel[hidden]{ display:none; }

/* ===========================================================
   Contact
   =========================================================== */
.contact-grid{
  display:grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 90px);
}
@media (max-width: 860px){ .contact-grid{ grid-template-columns: 1fr; } }
.field{
  display:flex; flex-direction:column; gap:8px;
  margin-bottom: 22px;
}
.field label{
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  text-transform:uppercase;
  color: var(--text-dim);
}
.field input, .field textarea{
  background: var(--panel);
  border: 1px solid var(--line-strong);
  color: var(--text);
  padding: 13px 14px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
}
.field input:focus, .field textarea:focus{ border-color: var(--amber-soft); outline:none; }
.contact-list{ margin-top: 8px; }
.contact-list li{
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  display:flex; justify-content:space-between; gap: 16px;
  flex-wrap: wrap;
}
.contact-list .cl-label{ color: var(--text-dim); font-family: var(--font-mono); font-size:0.72rem; letter-spacing:0.1em; text-transform:uppercase; }
.contact-list .cl-value{ color: var(--text); }
.contact-list a.cl-value:hover{ color: var(--amber-soft); }
.form-note{ margin-top: 18px; color: var(--text-dim); font-size: 0.85rem; }

/* ===========================================================
   Footer
   =========================================================== */
.site-footer{
  border-top: 1px solid var(--line);
  padding: 40px 0;
}
.footer-row{
  display:flex;
  justify-content:space-between;
  align-items:center;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-links{ display:flex; gap: 24px; }
.footer-links a{ color: var(--text-dim); font-family: var(--font-mono); font-size:0.7rem; letter-spacing:0.1em; text-transform:uppercase; }
.footer-links a:hover{ color: var(--text-muted); }
.footer-copy{ color: var(--text-dim); font-size: 0.8rem; }

/* Page hero (interior pages, shorter than home) */
.page-hero{
  padding: clamp(120px,20vh,180px) 0 clamp(40px,6vw,64px);
  border-bottom: 1px solid var(--line);
}
.page-hero .section-title{ margin-top: 14px; }

.reveal{ opacity:0; transform: translateY(18px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible{ opacity:1; transform:none; }
@media (prefers-reduced-motion: reduce){ .reveal{ opacity:1; transform:none; } }