/* ==========================================================================
   PB Air Inc. — Design System
   All brand tokens live here. Change --accent to reshade the entire site.
   ========================================================================== */

:root {
  /* Brand — drawn from the PB Air logo: green "PB" → teal/blue "AIR" + wing */
  --accent:        #0E97A8;   /* teal — primary brand color (matches truck wrap + logo "AIR") */
  --accent-2:      #57A93B;   /* green — from logo "PB" */
  --accent-deep:   #0B7386;   /* deep teal — hover / dark accents */
  --accent-glow:   rgba(14, 151, 168, 0.35);
  --brand-grad:    linear-gradient(120deg, #57A93B 0%, #0E97A8 58%, #0B7386 100%);

  /* Ink & surfaces (teal-navy, so green/teal pops) */
  --ink:           #0C1C22;   /* near-black teal-navy for text/backgrounds */
  --ink-soft:      #13333D;
  --muted:         #5A6C72;
  --line:          rgba(12, 28, 34, 0.10);

  --bg:            #FFFFFF;
  --bg-alt:        #F1F6F7;   /* soft section band */
  --bg-dark:       #071A22;   /* dark sections / hero */

  /* Glassmorphism */
  --glass-bg:      rgba(255, 255, 255, 0.10);
  --glass-bg-strong: rgba(255, 255, 255, 0.65);
  --glass-border:  rgba(255, 255, 255, 0.22);
  --glass-blur:    18px;

  /* Type */
  --font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Inter",
          "Segoe UI", Roboto, Helvetica, Arial, sans-serif;

  /* Rhythm */
  --maxw: 1180px;
  --pad:  clamp(20px, 5vw, 64px);
  --radius: 20px;
  --radius-lg: 28px;

  /* Motion */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --dur:  0.7s;

  --shadow: 0 20px 60px -24px rgba(11, 18, 32, 0.35);
  --shadow-glass: 0 8px 40px rgba(11, 18, 32, 0.12);
}

/* --------------------------------------------------------------------------
   Base
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3 { line-height: 1.08; letter-spacing: -0.02em; margin: 0 0 0.4em; font-weight: 700; }
h1 { font-size: clamp(2.6rem, 7vw, 5rem); }
h2 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h3 { font-size: clamp(1.15rem, 2vw, 1.4rem); }
p  { margin: 0 0 1em; }

.container { width: 100%; max-width: var(--maxw); margin-inline: auto; padding-inline: var(--pad); }

.eyebrow {
  display: inline-block;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}

.lead { font-size: clamp(1.05rem, 1.6vw, 1.28rem); color: var(--muted); max-width: 60ch; }

section { position: relative; padding: clamp(72px, 12vh, 140px) 0; }
.band { background: var(--bg-alt); }
.dark { background: var(--bg-dark); color: #EAF0FA; }
.dark .lead, .dark .muted { color: #9FB0C9; }
.dark h1, .dark h2, .dark h3 { color: #fff; }

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */

.btn {
  display: inline-flex; align-items: center; gap: 0.5em;
  padding: 0.9em 1.6em;
  border-radius: 100px;
  font-weight: 600; font-size: 0.98rem;
  cursor: pointer; border: 1px solid transparent; white-space: nowrap;
  transition: transform 0.25s var(--ease), box-shadow 0.25s var(--ease), background 0.25s;
  will-change: transform;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary {
  background: var(--brand-grad); color: #fff;
  box-shadow: 0 10px 30px -8px var(--accent-glow);
}
.btn-primary:hover { filter: brightness(1.06); box-shadow: 0 16px 40px -10px var(--accent-glow); }
.btn-ghost {
  background: var(--glass-bg); color: inherit;
  border-color: var(--glass-border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}
.btn-ghost:hover { background: rgba(255,255,255,0.18); }
.dark .btn-ghost { color: #fff; }

/* --------------------------------------------------------------------------
   Navigation (glassmorphism)
   -------------------------------------------------------------------------- */

.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem;
  padding: 14px var(--pad);
  transition: padding 0.4s var(--ease), background 0.4s, box-shadow 0.4s, border-color 0.4s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(11, 18, 32, 0.55);
  backdrop-filter: saturate(180%) blur(var(--glass-blur));
  -webkit-backdrop-filter: saturate(180%) blur(var(--glass-blur));
  border-bottom-color: rgba(255,255,255,0.10);
  padding-top: 10px; padding-bottom: 10px;
}
.nav__brand { display: flex; align-items: center; gap: 0.6rem; font-weight: 700; color: #fff; letter-spacing: -0.01em; }
.nav__brand img { height: 52px; width: auto; display: block; }
.nav__links { display: flex; align-items: center; gap: 1.6rem; }
.nav__links a { color: rgba(255,255,255,0.82); font-size: 0.95rem; font-weight: 500; transition: color 0.2s; }
.nav__links a:hover { color: #fff; }
.nav__cta { display: flex; align-items: center; gap: 0.75rem; }
.nav__phone { color: #fff; font-weight: 600; font-size: 0.95rem; white-space: nowrap; }

.nav__toggle { display: none; background: none; border: 0; cursor: pointer; padding: 10px; margin-right: -10px; }
.nav__toggle span { display: block; width: 24px; height: 2px; background: #fff; margin: 5px 0; transition: transform 0.3s, opacity 0.3s; }

@media (max-width: 900px) {
  .nav__links, .nav__phone { display: none; }
  .nav__toggle { display: block; }
  .nav.open .nav__links {
    display: flex; flex-direction: column; align-items: flex-start;
    position: absolute; top: 100%; left: 0; right: 0;
    padding: 20px var(--pad) 28px; gap: 1.1rem;
    background: rgba(11, 18, 32, 0.92);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
  }
  .nav.open .nav__toggle span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav.open .nav__toggle span:nth-child(2) { opacity: 0; }
  .nav.open .nav__toggle span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
}

/* --------------------------------------------------------------------------
   Hero (parallax)
   -------------------------------------------------------------------------- */

.hero {
  position: relative; min-height: 100vh; min-height: 100svh;   /* svh avoids the mobile address-bar jump */
  display: flex; align-items: center;
  color: #fff; overflow: hidden; padding-block: 0;
}
.hero__bg {
  position: absolute; inset: -10% 0 -10% 0;   /* extra height for parallax travel */
  background:
    radial-gradient(1200px 600px at 72% 12%, rgba(14,151,168,0.30), transparent 60%),
    linear-gradient(180deg, #071A22 0%, #0C2A33 55%, #071A22 100%);
  background-size: cover; background-position: center 40%;
  will-change: transform; z-index: 0;
}
/* Photo is set via inline background-image on #heroBg in index.html.
   Scrim is left- and bottom-biased so the left-aligned headline stays legible. */
.hero__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(100deg, rgba(5,20,26,0.88) 0%, rgba(5,20,26,0.55) 42%, rgba(5,20,26,0.18) 72%, rgba(5,20,26,0.04) 100%),
    linear-gradient(180deg, rgba(5,20,26,0.12) 0%, rgba(5,20,26,0.32) 62%, rgba(5,20,26,0.78) 100%);
}
.hero__grid {
  position: absolute; inset: 0; z-index: 1; opacity: 0.5;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.04) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 80% at 50% 0%, #000 40%, transparent 80%);
}
.hero__inner { position: relative; z-index: 2; padding-top: 96px; padding-bottom: 48px; }
.hero h1 { max-width: 16ch; }
.hero .lead { color: rgba(234,240,250,0.86); max-width: 52ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 0.9rem; margin-top: 2rem; }
.hero__scroll {
  position: absolute; bottom: 26px; left: 50%; transform: translateX(-50%);
  z-index: 2; color: rgba(255,255,255,0.6); font-size: 0.8rem; letter-spacing: 0.1em;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
}
.hero__scroll span { width: 1px; height: 34px; background: linear-gradient(rgba(255,255,255,0.6), transparent); animation: scrollpulse 2s var(--ease) infinite; }
@keyframes scrollpulse { 0%,100% { opacity: 0.2; transform: scaleY(0.6); } 50% { opacity: 1; transform: scaleY(1); } }

/* --------------------------------------------------------------------------
   Stats bar (glass cards + count-up)
   -------------------------------------------------------------------------- */

.stats { margin-top: -70px; position: relative; z-index: 10; }
.stats__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
}
.stat {
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  padding: 26px 22px; text-align: center;
  backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
  box-shadow: var(--shadow-glass);
}
.stat__num { font-size: clamp(1.9rem, 3.4vw, 2.8rem); font-weight: 700; letter-spacing: -0.03em; color: var(--ink); line-height: 1; }
.stat__num .unit { color: var(--accent); }
.stat__label { margin-top: 8px; font-size: 0.9rem; color: var(--muted); }
@media (max-width: 820px) { .stats__grid { grid-template-columns: repeat(2, 1fr); } }

/* --------------------------------------------------------------------------
   Section header
   -------------------------------------------------------------------------- */

.sec-head { max-width: 64ch; margin-bottom: clamp(36px, 5vw, 60px); }
.sec-head.center { margin-inline: auto; text-align: center; }

/* --------------------------------------------------------------------------
   Services (glass cards)
   -------------------------------------------------------------------------- */

.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
@media (max-width: 900px) { .cards { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .cards { grid-template-columns: 1fr; } }

.card {
  position: relative; padding: 30px;
  border-radius: var(--radius);
  background: #fff; border: 1px solid var(--line);
  box-shadow: 0 1px 0 rgba(255,255,255,0.6);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), border-color 0.4s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0; border-radius: inherit;
  background: radial-gradient(400px 200px at var(--mx, 50%) var(--my, 0%), var(--accent-glow), transparent 60%);
  opacity: 0; transition: opacity 0.4s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: transparent; }
.card:hover::before { opacity: 0.5; }
.card__icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center;
  background: var(--brand-grad);
  color: #fff; margin-bottom: 18px; position: relative;
}
.card__icon svg { width: 26px; height: 26px; }
.card h3 { margin-bottom: 0.4em; position: relative; }
.card p { color: var(--muted); margin: 0; position: relative; font-size: 0.98rem; }

/* Clickable service cards → prefill the request form */
.card[data-service] { cursor: pointer; }
.card[data-service]::after {
  content: "→"; position: absolute; top: 24px; right: 26px; z-index: 2;
  font-size: 1.15rem; font-weight: 700; color: var(--accent);
  opacity: 0; transform: translateX(-6px); transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}
.card[data-service]:hover::after,
.card[data-service]:focus-visible::after { opacity: 1; transform: none; }
.card[data-service]:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; }

/* --------------------------------------------------------------------------
   Coverage (parallax band)
   -------------------------------------------------------------------------- */

.coverage { overflow: hidden; }
.coverage__inner { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(30px, 5vw, 70px); align-items: center; }
@media (max-width: 900px) { .coverage__inner { grid-template-columns: 1fr; } }
.coverage__media {
  position: relative; border-radius: var(--radius-lg); overflow: hidden;
  aspect-ratio: 4 / 3; box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.08);
}
.coverage__media img { width: 100%; height: 100%; object-fit: cover; }
.coverage__chip {
  position: absolute; left: 18px; bottom: 18px;
  padding: 10px 18px; border-radius: 100px; font-weight: 600; font-size: 0.9rem; color: #fff;
  background: rgba(7, 26, 34, 0.45); border: 1px solid var(--glass-border);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.states { display: flex; gap: 10px; flex-wrap: wrap; margin: 20px 0 0; padding: 0; list-style: none; }
.states li {
  padding: 8px 16px; border-radius: 100px; font-weight: 600; font-size: 0.92rem;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
}

/* --------------------------------------------------------------------------
   Process (numbered steps)
   -------------------------------------------------------------------------- */

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; counter-reset: step; }
@media (max-width: 900px) { .steps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .steps { grid-template-columns: 1fr; } }
.step {
  position: relative; padding: 28px 24px; border-radius: var(--radius);
  background: var(--glass-bg-strong); border: 1px solid var(--glass-border);
  backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
}
.step::before {
  counter-increment: step; content: counter(step, decimal-leading-zero);
  font-weight: 700; font-size: 1rem; color: var(--accent);
  display: inline-block; margin-bottom: 14px; letter-spacing: 0.05em;
}
.step h3 { font-size: 1.1rem; }
.step p { color: var(--muted); margin: 0; font-size: 0.95rem; }

/* --------------------------------------------------------------------------
   Partners (marquee)
   -------------------------------------------------------------------------- */

.marquee { overflow: hidden; -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent); }
/* Spacing lives in each chip's margin (not flex gap) so the two identical sets
   tile exactly — translateX(-50%) then loops with no visible jump. */
.marquee__track { display: flex; width: max-content; animation: scrollx 76s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track .logo-chip {
  flex: none; display: flex; align-items: center; justify-content: center;
  height: 66px; padding: 0 30px; margin: 0 28px; background: #fff; border-radius: 16px;
  box-shadow: 0 10px 26px rgba(0,0,0,0.20);
  transition: transform 0.3s var(--ease);
}
.marquee__track .logo-chip:hover { transform: translateY(-4px); }
.marquee__track .logo-chip img { height: 30px; width: auto; display: block; }
@keyframes scrollx { from { transform: translateX(0); } to { transform: translateX(-50%); } }

/* --------------------------------------------------------------------------
   Showcase (full-bleed parallax photo band)
   -------------------------------------------------------------------------- */

.showcase { min-height: 64vh; display: flex; align-items: center; color: #fff; overflow: hidden; }
.showcase__bg {
  position: absolute; inset: -18% 0; z-index: 0;
  background-size: cover; background-position: center 60%;
  will-change: transform;
}
.showcase__bg::after {
  content: ""; position: absolute; inset: 0;
  background:
    linear-gradient(95deg, rgba(5,20,26,0.86) 0%, rgba(5,20,26,0.5) 52%, rgba(5,20,26,0.2) 100%),
    linear-gradient(180deg, rgba(5,20,26,0.2), rgba(5,20,26,0.45));
}
.showcase__inner { position: relative; z-index: 1; }
.showcase h2 { max-width: 18ch; }
.showcase .lead { color: rgba(234,244,246,0.9); max-width: 46ch; }

/* --------------------------------------------------------------------------
   About / credentials
   -------------------------------------------------------------------------- */

.about__inner { display: grid; grid-template-columns: 0.95fr 1.05fr; gap: clamp(30px, 5vw, 70px); align-items: center; }
@media (max-width: 900px) { .about__inner { grid-template-columns: 1fr; } }
.about__media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); aspect-ratio: 4 / 3; background: linear-gradient(160deg, #dfe7f4, #f5f7fb); }
.about__media img { width: 100%; height: 100%; object-fit: cover; }
.badges { display: grid; grid-template-columns: 1fr; gap: 14px; margin-top: 24px; }
.badge {
  display: flex; gap: 12px; align-items: flex-start;
  padding: 16px 18px; border-radius: 16px; background: #fff; border: 1px solid var(--line);
}
.badge svg { width: 22px; height: 22px; color: var(--accent); flex: none; margin-top: 2px; }
.badge b { display: block; font-size: 0.98rem; }
.badge small { color: var(--muted); }

/* --------------------------------------------------------------------------
   Contact
   -------------------------------------------------------------------------- */

.contact__inner { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(30px, 5vw, 64px); }
@media (max-width: 860px) { .contact__inner { grid-template-columns: 1fr; } }
.contact__info a { color: #EAF0FA; }
.contact__info .row { display: flex; gap: 14px; align-items: flex-start; margin-bottom: 22px; }
.contact__info .row svg { width: 22px; height: 22px; color: var(--accent); flex: none; margin-top: 3px; }
.contact__info .row b { display: block; }

.form {
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg); padding: clamp(24px, 4vw, 38px);
  backdrop-filter: blur(var(--glass-blur)); -webkit-backdrop-filter: blur(var(--glass-blur));
}
.field { margin-bottom: 16px; }
.field label { display: block; font-size: 0.85rem; font-weight: 600; margin-bottom: 6px; color: #EAF0FA; }
.field input, .field textarea, .field select {
  width: 100%; padding: 13px 15px; border-radius: 12px;
  border: 1px solid rgba(255,255,255,0.18); background: rgba(255,255,255,0.06);
  color: #fff; font: inherit; font-size: 0.98rem; transition: border-color 0.2s, background 0.2s;
}
.field input::placeholder, .field textarea::placeholder { color: rgba(234,240,250,0.4); }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--accent); background: rgba(255,255,255,0.10);
}
.field textarea { resize: vertical; min-height: 120px; }
/* Flash the Service dropdown when a card prefills it */
.field select.flash { animation: fieldflash 1.1s var(--ease); }
@keyframes fieldflash {
  0%   { border-color: var(--accent); background: rgba(14,151,168,0.22); box-shadow: 0 0 0 4px var(--accent-glow); }
  100% { border-color: rgba(255,255,255,0.18); background: rgba(255,255,255,0.06); box-shadow: 0 0 0 0 rgba(14,151,168,0); }
}
.form .btn-primary { width: 100%; justify-content: center; margin-top: 6px; }
.form__note { font-size: 0.82rem; color: rgba(234,240,250,0.55); margin: 14px 0 0; text-align: center; }
.form__status { margin-top: 14px; font-size: 0.92rem; text-align: center; display: none; }
.form__status.show { display: block; }
.form__status.ok { color: #6ee7a8; }
.form__status.err { color: #ff8a8a; }

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

.footer { background: #05141A; color: #7E9199; padding: 54px 0 40px; }
.footer__inner { display: flex; flex-direction: column; align-items: center; text-align: center; gap: 18px; }
.footer a { color: #B7C4DA; }
.footer a:hover { color: #fff; }
.footer__brand { display: flex; align-items: center; justify-content: center; gap: 10px; color: #fff; font-weight: 700; }
.footer__brand img { height: 30px; }
.footer__links { display: flex; flex-wrap: wrap; justify-content: center; align-items: center; }
.footer small { display: block; margin-top: 18px; color: #5A6980; font-size: 0.82rem; text-align: center; }

/* --------------------------------------------------------------------------
   Scroll-reveal
   -------------------------------------------------------------------------- */

[data-reveal] {
  opacity: 0; transform: translateY(28px);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease);
  transition-delay: var(--delay, 0s);
  will-change: opacity, transform;
}
[data-reveal].in { opacity: 1; transform: none; }

/* --------------------------------------------------------------------------
   Reduced motion
   -------------------------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; }
  [data-reveal] { opacity: 1; transform: none; }
  .hero__bg { inset: 0; }
}