/* ═══════════════════════════════════════════════════
   ALTUS — Aerial Imaging & Drone Services
   Stylesheet · Neutral Editorial Aesthetic
   ═══════════════════════════════════════════════════ */

/* ── TOKENS ── */
:root {
  --bg:          #1e1b17;
  --bg-2:        #252119;
  --bg-3:        #2d2820;
  --surface:     #332e25;
  --border:      #413b30;
  --border-lite: #564e41;
  --text:        #f0ece4;
  --text-2:      #bdb3a6;
  --text-3:      #8a7e72;
  --accent:      #c8b89a;
  --accent-dim:  #9e8e78;
  --white:       #f8f4ee;
  --danger:      #c0614a;

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'Barlow', sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  --radius:   4px;
  --radius-lg: 8px;
  --ease:     cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in:  cubic-bezier(0.4, 0, 1, 1);

  --nav-h: 72px;
  --section-gap: 130px;
  --gutter: clamp(24px, 5vw, 80px);
}

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

html {
  scroll-behavior: auto;
  font-size: 18px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.65;
  overflow-x: hidden;
  /* Prevent scroll chaining on mobile which causes direction-change lag */
  overscroll-behavior: none;
}

img, video { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }

/* ── NOISE OVERLAY ── */
.noise-overlay {
  position: fixed;
  inset: 0;
  z-index: 1000;
  pointer-events: none;
  opacity: 0.032;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
  background-size: 160px;
  will-change: transform;
}

/* ── TYPOGRAPHY HELPERS ── */
.mono {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
}
.mono.small { font-size: 0.68rem; }
.italic { font-style: italic; }

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 900;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 var(--gutter);
  transition: background 0.4s var(--ease), border-color 0.4s var(--ease);
  border-bottom: 1px solid transparent;
  /* Keep nav permanently on its own compositor layer so backdrop-filter
     blur never triggers a full-page repaint during scroll */
  will-change: transform;
  transform: translateZ(0);
}
.nav.scrolled {
  background: rgba(30, 27, 23, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-color: var(--border);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: pointer;
}
.logo-mark {
  font-size: 1rem;
  color: var(--accent);
  line-height: 1;
}
.nav-logo-img {
  width: 36px;
  height: 36px;
  object-fit: contain;
  filter: invert(1);
  mix-blend-mode: screen;
  opacity: 0.92;
}
.logo-text {
  font-family: var(--font-mono);
  font-size: 0.84rem;
  letter-spacing: 0.28em;
  color: var(--white);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(20px, 3vw, 48px);
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--text-2);
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta {
  padding: 9px 22px;
  border: 1px solid var(--border-lite);
  border-radius: var(--radius);
  color: var(--accent) !important;
  transition: background 0.2s, border-color 0.2s !important;
}
.nav-cta:hover {
  background: rgba(200, 184, 154, 0.08) !important;
  border-color: var(--accent) !important;
}

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
}

/* ── HERO ── */
.hero {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: var(--nav-h) var(--gutter) clamp(60px, 8vw, 120px);
  position: relative;
  overflow: hidden;
}

/* Subtle radial glow */
.hero::before {
  content: '';
  position: absolute;
  top: -10%;
  right: -5%;
  width: 70vw;
  height: 70vw;
  background: radial-gradient(circle, rgba(200,184,154,0.06) 0%, transparent 65%);
  pointer-events: none;
}

.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: clamp(32px, 5vw, 60px);
  opacity: 0;
  animation: fadeUp 0.9s 0.2s var(--ease) forwards;
}
.divider-dot {
  width: 3px; height: 3px;
  border-radius: 50%;
  background: var(--text-3);
  display: inline-block;
}

.hero-headline {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(72px, 12vw, 160px);
  line-height: 0.9;
  letter-spacing: -0.01em;
  display: flex;
  flex-direction: column;
  margin-bottom: clamp(24px, 3vw, 40px);
}
.hero-headline .line {
  display: block;
  opacity: 0;
  transform: translateY(40px);
  animation: fadeUp 1s var(--ease) forwards;
}
.line-1 { animation-delay: 0.35s; }
.line-2 { animation-delay: 0.5s;  color: var(--accent); padding-left: clamp(40px, 8vw, 120px); }
.line-3 { animation-delay: 0.65s; }

.hero-sub {
  max-width: 480px;
  color: var(--text-2);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  margin-bottom: clamp(32px, 4vw, 52px);
  opacity: 0;
  animation: fadeUp 0.9s 0.8s var(--ease) forwards;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.9s 1s var(--ease) forwards;
}

.hero-scroll-hint {
  position: absolute;
  bottom: clamp(28px, 4vw, 52px);
  right: var(--gutter);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  opacity: 0;
  animation: fadeIn 1s 1.5s ease forwards;
}
.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--accent-dim), transparent);
  animation: scrollPulse 2s 2s ease-in-out infinite;
}

/* ── BUTTONS ── */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: var(--accent);
  color: var(--bg);
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid var(--accent);
  transition: background 0.25s var(--ease), transform 0.2s var(--ease), box-shadow 0.25s;
  cursor: pointer;
}
.btn-primary:hover {
  background: var(--white);
  border-color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(200,184,154,0.2);
}

.btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.73rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-2);
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--text); border-color: var(--text-2); }



/* ── REEL ── */
.reel {
  padding: var(--section-gap) var(--gutter);
}
.reel-label {
  margin-bottom: 24px;
}
.reel-container {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
}
.reel-fallback {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-3);
}
.reel-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.placeholder-icon {
  font-size: 2.5rem;
  color: var(--accent-dim);
  opacity: 0.5;
}
.reel-caption {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}
.reel-caption p {
  font-size: 0.92rem;
  color: var(--text-2);
}

/* ── MUX PLAYER CUSTOM STYLING ── */
mux-player {
  --controls-background-color: rgba(15,14,13,0.75);
  --controls-backdrop-filter: blur(6px);
  display: block;
}

/* ── SECTION HELPERS ── */
.section-header {
  margin-bottom: clamp(48px, 6vw, 80px);
}
.section-num {
  display: block;
  margin-bottom: 16px;
}
.section-title {
  font-family: var(--font-display);
  font-weight: 300;
  font-size: clamp(44px, 6vw, 80px);
  line-height: 1.05;
  letter-spacing: -0.01em;
}
.section-title em { color: var(--accent); font-style: italic; }

/* ── SERVICES ── */
.services {
  padding: var(--section-gap) var(--gutter);
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.service-card {
  background: var(--bg-2);
  padding: clamp(28px, 4vw, 48px);
  position: relative;
  transition: background 0.3s var(--ease);
}
.service-card:hover { background: var(--surface); }
.service-card::before {
  content: attr(data-index);
  position: absolute;
  top: 20px; right: 24px;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.12em;
  color: var(--text-3);
}
.service-icon {
  font-size: 1.6rem;
  color: var(--accent);
  margin-bottom: 20px;
  line-height: 1;
}
.service-card h3 {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 400;
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}
.service-card p {
  font-size: 0.95rem;
  color: var(--text-2);
  margin-bottom: 20px;
  line-height: 1.7;
}
.service-details {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.service-details li {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  color: var(--text-3);
  text-transform: uppercase;
  padding-left: 14px;
  position: relative;
}
.service-details li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--accent-dim);
}

/* ── WORK / PORTFOLIO ── */
.work {
  padding: var(--section-gap) var(--gutter);
}
.work-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto auto;
  gap: 16px;
}
.project-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  cursor: pointer;
  group: true;
}
.card-wide {
  grid-column: 1 / -1;
}
.project-media {
  position: relative;
  aspect-ratio: 16/9;
  background: var(--surface);
  overflow: hidden;
}
.card-wide .project-media {
  aspect-ratio: 21/9;
}
.project-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(15,14,13,0.85) 0%, transparent 55%);
  pointer-events: none;
}
.project-info {
  position: absolute;
  bottom: 0; left: 0; right: 0;
  padding: clamp(16px, 3vw, 32px);
}
.project-info .mono {
  display: block;
  color: var(--accent-dim);
  margin-bottom: 6px;
}
.project-info h3 {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.5vw, 2rem);
  font-weight: 300;
  margin-bottom: 6px;
}
.project-info p {
  font-size: 0.9rem;
  color: var(--text-2);
  max-width: 420px;
}



/* ── ABOUT ── */
.about {
  padding: var(--section-gap) var(--gutter);
  background: var(--bg-2);
  border-top: 1px solid var(--border);
}
.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 7vw, 120px);
  align-items: start;
}
.about-text .section-num { display: block; margin-bottom: 16px; }
.about-text h2 {
  font-family: var(--font-display);
  font-size: clamp(36px, 5vw, 68px);
  font-weight: 300;
  line-height: 1.1;
  margin-bottom: 24px;
}
.about-text h2 em { color: var(--accent); font-style: italic; }
.about-text p {
  color: var(--text-2);
  font-size: 1.02rem;
  line-height: 1.8;
  margin-bottom: 18px;
  max-width: 460px;
}
.about-text .btn-primary { margin-top: 12px; }

.cert-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.cert-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-3);
  transition: background 0.2s;
}
.cert-item:last-child { border-bottom: none; }
.cert-item:hover { background: var(--surface); }
.cert-icon {
  font-size: 0.75rem;
  color: var(--accent);
  margin-top: 3px;
  flex-shrink: 0;
}
.cert-item strong {
  display: block;
  font-weight: 400;
  font-size: 0.9rem;
  margin-bottom: 3px;
}
.cert-item .mono { display: block; }

/* ── CONTACT ── */
.contact {
  padding: var(--section-gap) var(--gutter);
  border-top: 1px solid var(--border);
}
.contact-inner {
  max-width: 680px;
}
.contact-inner .section-num { display: block; margin-bottom: 16px; }
.contact-inner h2 {
  font-family: var(--font-display);
  font-size: clamp(40px, 6vw, 80px);
  font-weight: 300;
  line-height: 1.05;
  margin-bottom: 16px;
}
.contact-inner h2 em { color: var(--accent); font-style: italic; }
.contact-sub {
  color: var(--text-2);
  margin-bottom: 40px;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.form-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-field label {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-3);
}
.form-field input,
.form-field select,
.form-field textarea {
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 0.97rem;
  padding: 12px 16px;
  outline: none;
  transition: border-color 0.2s, background 0.2s;
  resize: vertical;
  appearance: none;
  -webkit-appearance: none;
}
.form-field input::placeholder,
.form-field textarea::placeholder { color: var(--text-3); }
.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--accent-dim);
  background: var(--bg-3);
}
.form-field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' fill='none'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%236b6259' stroke-width='1.5' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
  color: var(--text);
}
.form-field select option {
  background: var(--bg-2);
  color: var(--text);
}
.btn-submit {
  align-self: flex-start;
  margin-top: 8px;
}
.form-note { margin-top: 4px; }

/* ── FOOTER ── */
.footer {
  background: var(--bg-2);
  border-top: 1px solid var(--border);
  padding: 60px var(--gutter) 36px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 52px;
  flex-wrap: wrap;
  gap: 40px;
}
.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.footer-brand .logo-mark { font-size: 1.2rem; color: var(--accent); }
.footer-brand .logo-text {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  letter-spacing: 0.28em;
  color: var(--white);
}
.footer-brand .mono { margin-top: 4px; }

.footer-links {
  display: flex;
  gap: 64px;
}
.footer-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.col-head {
  display: block;
  margin-bottom: 4px;
  color: var(--text-3) !important;
}
.footer-col a {
  font-size: 0.95rem;
  color: var(--text-2);
  transition: color 0.2s;
}
.footer-col a:hover { color: var(--text); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  flex-wrap: wrap;
  gap: 8px;
}

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(32px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1;   transform: scaleY(1.15); transform-origin: top; }
}

/* ── SCROLL PERFORMANCE ── */
/* paint containment limits repaint scope per section without interfering
   with anchor position calculations (layout containment broke that) */
.services, .work, .about, .contact, .reel {
  contain: paint;
}
/* Ensure animated elements only use compositor-friendly properties.
   will-change is set/unset dynamically in JS — these rules are the
   fallback for elements already in the viewport on load. */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}
.fade-up.visible {
  opacity: 1;
  transform: translateY(0);
}
.service-card:nth-child(2)  { transition-delay: 0.1s; }
.service-card:nth-child(3)  { transition-delay: 0.2s; }
.project-card:nth-child(2)  { transition-delay: 0.1s; }
.project-card:nth-child(3)  { transition-delay: 0.2s; }
.cert-item:nth-child(2) { transition-delay: 0.08s; }
.cert-item:nth-child(3) { transition-delay: 0.16s; }

/* ── MOBILE MENU ── */
.mobile-menu {
  position: fixed;
  top: 0; right: 0;
  z-index: 800;
  width: min(320px, 85vw);
  height: 100dvh;
  background: var(--bg-2);
  border-left: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform 0.35s var(--ease);
  will-change: transform;
}
.mobile-menu.open {
  transform: translateX(0);
}
.mobile-menu-inner {
  display: flex;
  flex-direction: column;
  justify-content: center;
  flex: 1;
  padding: calc(var(--nav-h) + 32px) 40px 48px;
  gap: 0;
}
.mobile-nav-links {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.mobile-nav-links li {
  border-bottom: 1px solid var(--border);
}
.mobile-nav-links li:first-child {
  border-top: 1px solid var(--border);
}
.mobile-nav-links a {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.8rem, 6vw, 2.4rem);
  font-weight: 300;
  color: var(--text);
  padding: 18px 0;
  letter-spacing: -0.01em;
  transition: color 0.2s, padding-left 0.2s var(--ease);
}
.mobile-nav-links a:hover,
.mobile-nav-links a:active {
  color: var(--accent);
  padding-left: 8px;
}
.mobile-menu-footer {
  margin-top: 48px;
}

/* Backdrop */
.mobile-menu-backdrop {
  position: fixed;
  inset: 0;
  z-index: 799;
  background: rgba(15, 13, 10, 0.7);
  backdrop-filter: blur(2px);
  -webkit-backdrop-filter: blur(2px);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease);
}
.mobile-menu-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

/* Hamburger → X animation */
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--text);
  transition: transform 0.25s var(--ease), opacity 0.2s;
  transform-origin: center;
}
.nav-hamburger.open span:first-child {
  transform: translateY(3px) rotate(45deg);
}
.nav-hamburger.open span:last-child {
  transform: translateY(-3px) rotate(-45deg);
}

/* ── RESPONSIVE ── */
@media (max-width: 900px) {
  .about-content {
    grid-template-columns: 1fr;
  }
  .work-grid {
    grid-template-columns: 1fr;
  }
  .card-wide { grid-column: 1; }
  .card-wide .project-media { aspect-ratio: 16/9; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  :root { --section-gap: 80px; }

  .nav-links { display: none; }
  .nav-hamburger { display: flex; }

  .hero-headline {
    font-size: clamp(60px, 16vw, 100px);
  }

  .footer-top { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}