/* Desktop‑first stylesheet – baseline layout */
@import url('tokens.css');

/* Reset & base */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--color-text-gray);
  background-color: var(--color-bg-dark);
  overflow-x: hidden;
  scroll-behavior: smooth; /* Enable smooth scrolling globally */
}

body {
  background-color: var(--color-bg-dark);
  min-height: 100vh;
  position: relative;
}

/* Main app container */
#app {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--side-padding-fluid);
  position: relative;
  z-index: 2; /* Sits above background grid lines */
}

/* ── Equal section gap rule ─────────────────────────────────────────────
   Every content section gets the same vertical breathing room.
   Individual component wrappers should NOT add their own top/bottom padding
   on top of this — they control only their internal layout spacing.
   ────────────────────────────────────────────────────────────────────── */
.section-container {
  padding-top: var(--section-gap);
  padding-bottom: var(--section-gap);
}

/* Exception: hidden-friction is LOCKED.
   Its inner .friction-slider-section already owns padding: 80px 0.
   We zero out the section-container padding to avoid double-spacing.  */
#section-featured {
  padding-top: 0;
  padding-bottom: 0;
}

@media (max-width: 768px) {
  .section-container {
    padding-top: var(--section-gap-mobile);
    padding-bottom: var(--section-gap-mobile);
  }
  #section-featured {
    padding-top: 0;
    padding-bottom: 0;
  }
}

/* Fluid typography defaults */
h1, h2, h3, h4, h5, h6 {
  color: var(--color-text-white);
  font-weight: 600;
}

h1 { font-size: clamp(2rem, 5.5vw, 4.5rem); }
h2 { font-size: clamp(1.5rem, 4vw, 3rem); }

/* Global helper classes */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-4 { margin-bottom: 2rem; }

/* Default buttons & links using primary blue */
a {
  color: var(--color-primary-blue);
  text-decoration: none;
  transition: color 0.3s ease;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.75rem 1.5rem;
  background-color: transparent;
  color: var(--color-primary-blue);
  border: 1px solid var(--color-primary-blue);
  border-radius: 2rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary:hover {
  background-color: var(--color-primary-blue);
  color: var(--color-bg-dark);
}

/* Lazy loading image transition support */
img.lazy-load {
  opacity: 0;
  transition: opacity 0.5s ease-in-out;
  will-change: opacity;
}

img.lazy-load.lazy-loaded {
  opacity: 1;
}

/* Sticky top navigation layout - 100% wide, fully transparent and borderless */
#section-header {
  position: sticky;
  top: 0;
  z-index: 100;
  width: 100%;
  padding-top: 0;
  padding-bottom: 0;
  background: transparent;
}

#section-header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 120px; /* extends below the header to create a smooth fade transition */
  background: linear-gradient(
    to bottom,
    rgba(21, 21, 18, 0.95) 0%,
    rgba(21, 21, 18, 0.85) var(--header-height, 80px),
    rgba(21, 21, 18, 0) 100%
  );
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  pointer-events: none; /* click and scroll through the overlay */
  z-index: -1; /* sits behind links but above scrolling page contents */
}

/* Above the fold layout constraints to fit hero and logos in 100vh/100dvh (excluding sticky header) without scroll */
@media (min-width: 769px) {
  .above-fold-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - var(--header-height, 80px));
    height: calc(100dvh - var(--header-height, 80px));
    justify-content: space-between;
    gap: clamp(1rem, 3vh, 2.5rem); /* Guarantees hero and logos never touch on small viewport heights */
    width: 100%;
    position: relative;
    overflow: hidden;
  }
  
  .above-fold-container .section-container {
    padding-top: 0;
    padding-bottom: 0;
  }
  
  .above-fold-container #section-hero {
    flex-grow: 1;
    display: flex;
    align-items: center;
    width: 100%;
  }
}

@media (max-width: 768px) {
  .above-fold-container {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - var(--header-height, 80px));
    min-height: calc(100dvh - var(--header-height, 80px));
    justify-content: space-between;
    width: 100%;
    position: relative;
  }
  
  .above-fold-container .section-container {
    padding-top: 0;
    padding-bottom: 0;
  }
  
  .above-fold-container #section-hero {
    flex-grow: 1;
    display: flex;
    align-items: center;
    width: 100%;
  }
}

/* Hidden Friction SVG Image initial state for scroll-triggered entrance */
#section-hidden-friction-image img {
  opacity: 0;
  transform: translateY(30px);
}