/* =====================================================================
   BoltCargo Logistics — stylesheet
   Sections:
     1. Design tokens (CSS variables)
     2. Base / reset
     3. Reusable building blocks (container, buttons, eyebrow, headings)
     4. Header / navigation
     5. Hero
     6. Section helpers (split layout, swoosh image, lists, quotes)
     7. Individual sections (about banner, services cards, why, innovation…)
     8. Contact form
     9. Footer
    10. Scroll-reveal animation
    11. Responsive (media queries)
    12. Motion preferences
   ===================================================================== */


/* ---------------------------------------------------------------------
   1. DESIGN TOKENS
   Variables defined once and reused everywhere. Values come from
   BRAND_GUIDELINES.md. Change here -> updates site-wide.
   --------------------------------------------------------------------- */
:root {
  /* Brand colours */
  --navy:   #012069;
  --ocean:  #0079C1;
  --teal:   #00CEB1;
  --indigo: #1A1BDF;
  --ink:    #09080C;

  /* Neutrals */
  --white:  #FFFFFF;
  --pale:   #EEF4FA;
  --mist:   #D9E2EC;
  --slate:  #3B4A63;

  /* Signature teal -> ocean -> indigo gradient */
  --brand-gradient: linear-gradient(120deg, #00CEB1 0%, #0079C1 45%, #1A1BDF 100%);

  /* Typography */
  --font: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --fs-hero:    clamp(2.4rem, 5vw, 4rem);
  --fs-h2:      clamp(1.8rem, 3.2vw, 2.75rem);
  --fs-h3:      clamp(1.15rem, 1.6vw, 1.4rem);
  --fs-eyebrow: 0.8rem;
  --fs-body:    clamp(1rem, 1.1vw, 1.125rem);
  --fs-small:   0.875rem;

  /* Layout */
  --container:  1200px;
  --pad-x:      clamp(1.25rem, 5vw, 4rem);
  --section-y:  clamp(4rem, 9vw, 7rem);
  --header-h:   76px;

  --shadow:    0 10px 30px rgba(1, 32, 105, 0.10);
  --shadow-lg: 0 24px 50px rgba(1, 32, 105, 0.16);
  --radius:    14px;
}


/* ---------------------------------------------------------------------
   2. BASE / RESET
   --------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  font-size: var(--fs-body);
  line-height: 1.65;
  color: var(--slate);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;                 /* belt-and-braces: no sideways scroll */
}

img { display: block; max-width: 100%; height: auto; }

a { color: var(--ocean); text-decoration: none; }
a:hover { text-decoration: underline; }

h1, h2, h3 { color: var(--navy); line-height: 1.1; letter-spacing: -0.01em; }
h2 { font-size: var(--fs-h2); font-weight: 700; }
h3 { font-size: var(--fs-h3); font-weight: 600; }

p { margin-bottom: 1rem; }
p:last-child { margin-bottom: 0; }

/* Leave room for the fixed header when jumping to a section */
section[id], main > section { scroll-margin-top: calc(var(--header-h) + 12px); }

/* Visible focus ring for keyboard users (accessibility) */
:focus-visible {
  outline: 3px solid var(--ocean);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Skip link: hidden until focused, then appears top-left */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--navy);
  color: #fff;
  padding: 0.7rem 1.2rem;
  z-index: 200;
  border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }


/* ---------------------------------------------------------------------
   3. REUSABLE BUILDING BLOCKS
   --------------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: var(--pad-x);
}

/* Standard vertical spacing for a section */
.section { padding-block: var(--section-y); }

/* Pale-blue alternating background */
.section--pale { background: var(--pale); }

/* Small uppercase label above section titles */
.eyebrow {
  font-size: var(--fs-eyebrow);
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ocean);
  margin-bottom: 0.85rem;
}

/* Centred section heading block (used by Services, Why BCL) */
.section__head { max-width: 760px; margin: 0 auto clamp(2rem, 4vw, 3.5rem); text-align: center; }
.section__head .eyebrow { display: block; }
.section__intro { color: var(--slate); margin-top: 1rem; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  font-weight: 600;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, background 0.18s ease, color 0.18s ease;
  text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary {
  background: var(--ocean);
  color: var(--white);
  box-shadow: 0 8px 20px rgba(0, 121, 193, 0.30);
}
.btn--primary:hover { background: var(--navy); }
.btn--ghost {
  background: transparent;
  color: var(--navy);
  border-color: var(--mist);
}
.btn--ghost:hover { border-color: var(--ocean); color: var(--ocean); }


/* ---------------------------------------------------------------------
   4. HEADER / NAVIGATION
   --------------------------------------------------------------------- */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.25s ease, box-shadow 0.25s ease;
  background: transparent;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  box-shadow: var(--shadow);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.logo img { width: 150px; height: auto; }

.nav__list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2vw, 2rem);
}
.nav__list a { color: var(--navy); font-weight: 500; font-size: 0.95rem; }
.nav__list a:hover { color: var(--ocean); text-decoration: none; }
.nav__cta {
  background: var(--navy);
  color: var(--white) !important;
  padding: 0.55rem 1.15rem;
  border-radius: 999px;
}
.nav__cta:hover { background: var(--ocean); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
}
.nav-toggle__bar {
  width: 26px; height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }


/* ---------------------------------------------------------------------
   5. HERO  (PDF page 1)
   --------------------------------------------------------------------- */
.hero {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 4vw, 4rem);
  min-height: 100vh;
  padding: var(--header-h) var(--pad-x) clamp(2rem, 5vw, 4rem);
  max-width: calc(var(--container) + 8vw);
  margin-inline: auto;
}
.hero__media {
  position: relative;
  height: min(82vh, 640px);
  border-radius: 0 var(--radius) var(--radius) 0;
  overflow: hidden;
  clip-path: ellipse(118% 100% at 0% 50%);   /* curved right edge = the "B" swoosh */
}
.hero__media img { width: 100%; height: 100%; object-fit: cover; }
.hero__swoosh-edge {
  position: absolute;
  inset: 0;
  clip-path: ellipse(118% 100% at 0% 50%);
  border-right: 6px solid transparent;
  background:
    linear-gradient(var(--white), var(--white)) padding-box,
    var(--brand-gradient) border-box;
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor; mask-composite: exclude;
  pointer-events: none;
}
.hero__content { max-width: 34rem; }
.hero__title { font-size: var(--fs-hero); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 1.1rem; }
.hero__lead { font-size: var(--fs-body); color: var(--slate); margin-bottom: 2rem; }
.hero__actions { display: flex; flex-wrap: wrap; gap: 1rem; }


/* ---------------------------------------------------------------------
   6. SECTION HELPERS
   --------------------------------------------------------------------- */

/* Two-column "split": text on one side, image on the other.
   Modifiers decide which side the image sits on (desktop). */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(2rem, 5vw, 4.5rem);
}
/* media-right: content first, image second (image appears on the right) */
.split--media-right .split__content { order: 1; }
.split--media-right .split__media   { order: 2; }
/* media-left: image first (appears on the left), content second */
.split--media-left .split__media    { order: 1; }
.split--media-left .split__content  { order: 2; }

.split__content { max-width: 38rem; }

/* Plain image block (rounded corners + soft shadow) */
.split__media img {
  width: 100%;
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
}

/* Swoosh-masked images: carve a curved edge like the deck's bracket.
   swoosh-right curves the RIGHT edge; swoosh-left curves the LEFT edge. */
.split__media--swoosh { position: relative; }
.split__media--swoosh img { box-shadow: none; }
.swoosh-right img { clip-path: ellipse(115% 100% at 0% 50%); border-radius: var(--radius); }
.swoosh-left  img { clip-path: ellipse(115% 100% at 100% 50%); border-radius: var(--radius); }

/* Tick list: chevron-marker bullets in ocean blue (matches the deck's "›") */
.ticklist { list-style: none; margin: 1.25rem 0; display: grid; gap: 0.7rem; }
.ticklist li { position: relative; padding-left: 1.7rem; }
.ticklist li::before {
  content: "›";
  position: absolute;
  left: 0;
  top: -0.05em;
  color: var(--ocean);
  font-weight: 800;
  font-size: 1.2em;
}
.ticklist--detailed li { color: var(--slate); }
.ticklist--detailed strong { color: var(--navy); }

/* Pull-quote blocks */
.quote { margin-top: clamp(2rem, 4vw, 3rem); }
.quote blockquote {
  position: relative;
  font-size: clamp(1.2rem, 2vw, 1.6rem);
  line-height: 1.45;
  font-weight: 500;
  font-style: italic;
  color: var(--navy);
  padding-left: 1.5rem;
  border-left: 4px solid transparent;
  border-image: var(--brand-gradient) 1;     /* gradient accent bar */
  max-width: 60rem;
}
.quote--center { text-align: center; }
.quote--center blockquote {
  margin-inline: auto;
  border-left: 0;
  padding-left: 0;
  padding-top: 1.25rem;
  border-top: 4px solid transparent;
  border-image: var(--brand-gradient) 1;
}


/* ---------------------------------------------------------------------
   7. INDIVIDUAL SECTIONS
   --------------------------------------------------------------------- */

/* About — gradient banner with the positioning line */
.banner {
  margin-top: clamp(3rem, 6vw, 5rem);
  background: var(--brand-gradient);
}
.banner__text {
  color: #fff;
  font-size: clamp(1.25rem, 2.2vw, 1.9rem);
  font-weight: 600;
  line-height: 1.3;
  text-align: center;
  padding-block: clamp(2rem, 4vw, 3rem);
  margin: 0;
  max-width: 60rem;
  margin-inline: auto;
}

/* Services — card grid */
.cards {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(1rem, 2vw, 1.75rem);
}
.card {
  position: relative;
  background: var(--white);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 2rem 1.75rem;
  box-shadow: var(--shadow);
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card__num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px; height: 46px;
  border-radius: 12px;
  background: var(--brand-gradient);
  color: #fff;
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--slate); font-size: 1rem; }

/* Why BCL — benefits grid */
.benefits {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: clamp(1.25rem, 3vw, 2.5rem);
}
.benefit {
  padding-left: 1.25rem;
  border-left: 3px solid;
  border-image: var(--brand-gradient) 1;
}
.benefit h3 { margin-bottom: 0.4rem; }
.benefit p { color: var(--slate); font-size: 1rem; }

/* Innovation — floating stat badge over the drone image */
.stat-badge {
  position: absolute;
  left: clamp(0.75rem, 2vw, 1.5rem);
  bottom: clamp(0.75rem, 2vw, 1.5rem);
  background: rgba(1, 32, 105, 0.92);
  color: #fff;
  border-radius: var(--radius);
  padding: 1rem 1.4rem;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(4px);
}
.stat-badge__num {
  display: block;
  font-size: 2.2rem;
  font-weight: 800;
  line-height: 1;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
          background-clip: text;
  -webkit-text-fill-color: transparent;
}
.stat-badge__label { font-size: 0.85rem; letter-spacing: 0.04em; opacity: 0.9; }

/* Innovation — availability callout */
.callout {
  margin-top: clamp(2rem, 4vw, 3rem);
  background: var(--pale);
  border: 1px solid var(--mist);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
  color: var(--navy);
  max-width: 70rem;
  margin-inline: auto;
}
.callout strong { color: var(--ocean); }


/* ---------------------------------------------------------------------
   8. CONTACT FORM
   --------------------------------------------------------------------- */
.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(2rem, 5vw, 4.5rem);
  align-items: start;
}
.contact__intro { max-width: 34rem; }

.contact__form { display: grid; gap: 1.1rem; }
/* Stop the submit button from stretching to the full grid width:
   "justify-self: start" shrinks it to its content and aligns it left. */
.contact__form .btn { justify-self: start; }
.field { display: grid; gap: 0.4rem; }
.field label { font-weight: 600; color: var(--navy); font-size: 0.95rem; }
.field input,
.field textarea {
  font: inherit;
  color: var(--navy);
  padding: 0.8rem 1rem;
  border: 1px solid var(--mist);
  border-radius: 10px;
  background: var(--white);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}
.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--ocean);
  box-shadow: 0 0 0 3px rgba(0, 121, 193, 0.18);
}
.field textarea { resize: vertical; }

/* Error state + message (toggled by JS) */
.field.invalid input,
.field.invalid textarea { border-color: #d33; }
.field__error { color: #d33; font-size: 0.85rem; min-height: 1em; }

.form-success {
  background: rgba(0, 206, 177, 0.12);
  border: 1px solid var(--teal);
  color: var(--navy);
  padding: 0.9rem 1.1rem;
  border-radius: 10px;
  font-weight: 500;
}


/* ---------------------------------------------------------------------
   9. FOOTER
   --------------------------------------------------------------------- */
.site-footer { background: var(--navy); color: #cdd6e8; }
.footer-inner {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 2rem;
  padding-block: clamp(2.5rem, 5vw, 4rem);
  align-items: start;
}
.footer__brand img { width: 180px; margin-bottom: 1rem; }
.footer__brand p { max-width: 34rem; font-size: 0.95rem; }
.footer__nav { display: flex; flex-wrap: wrap; gap: 0.5rem 1.5rem; }
.footer__nav a { color: #cdd6e8; font-weight: 500; }
.footer__nav a:hover { color: #fff; }
.footer__bar { border-top: 1px solid rgba(255,255,255,0.12); }
.footer__bar p { padding-block: 1.25rem; font-size: var(--fs-small); margin: 0; }


/* ---------------------------------------------------------------------
   10. SCROLL-REVEAL ANIMATION
   Elements with .reveal start faded/slightly down; JS adds .in-view
   (via IntersectionObserver) to fade them up when scrolled into view.
   --------------------------------------------------------------------- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.in-view { opacity: 1; transform: none; }


/* ---------------------------------------------------------------------
   11. RESPONSIVE
   --------------------------------------------------------------------- */

/* Below 1024px: services drop to 2 columns; tighten hero */
@media (max-width: 1024px) {
  .hero__media { height: min(70vh, 560px); }
  .cards { grid-template-columns: repeat(2, 1fr); }
}

/* Below 768px (mobile): single columns, hamburger menu */
@media (max-width: 768px) {

  /* Mobile menu */
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    background: var(--white);
    box-shadow: var(--shadow);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav.open { max-height: 80vh; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; padding: 0.5rem var(--pad-x) 1.25rem; }
  .nav__list li { border-bottom: 1px solid var(--mist); }
  .nav__list a { display: block; padding: 0.9rem 0; }
  .nav__cta { text-align: center; margin-top: 0.75rem; }

  /* Hero stacks */
  .hero { grid-template-columns: 1fr; min-height: auto; gap: 1.5rem; padding-top: calc(var(--header-h) + 1rem); }
  .hero__media { height: 48vh; border-radius: var(--radius); clip-path: ellipse(140% 100% at 50% 0%); }
  .hero__swoosh-edge { display: none; }
  .hero__content { max-width: none; }

  /* All split layouts stack to one column; image always on top.
     We force the image first regardless of the desktop order. */
  .split { grid-template-columns: 1fr; gap: 1.75rem; }
  .split__media { order: -1 !important; }
  .split__content { order: 0 !important; max-width: none; }

  /* Soften the swoosh on small screens (curve the bottom instead of the side) */
  .swoosh-right img, .swoosh-left img { clip-path: ellipse(150% 100% at 50% 0%); }

  /* Services + benefits become single column */
  .cards { grid-template-columns: 1fr; }
  .benefits { grid-template-columns: 1fr; }

  /* Contact + footer stack */
  .contact__grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}


/* ---------------------------------------------------------------------
   12. MOTION PREFERENCES
   Respect "reduce motion" system settings.
   --------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  * { transition: none !important; animation: none !important; }
  .reveal { opacity: 1; transform: none; }   /* show content immediately */
}