/* ============================================
   FuseIoT — Base Styles
   Reset, typography, global layout
   Ref: 11-typography-color-system.md
   ============================================ */

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

html.lenis, html.lenis body {
  height: auto;
}

.lenis.lenis-smooth {
  scroll-behavior: auto !important;
}

.lenis.lenis-smooth [data-lenis-prevent] {
  overscroll-behavior: contain;
}

body {
  font-family: var(--font-family);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  overflow-x: hidden;
}

/* Typography — Hierarchy by SIZE, not weight */
h1, h2, h3, h4, h5, h6 {
  font-weight: 400;
  line-height: 0.95;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

h1 {
  font-size: var(--headline-massive);
}

h2 {
  font-size: var(--headline-large);
}

h3 {
  font-size: var(--headline-medium);
}

h4 {
  font-size: var(--headline-small);
}

p {
  font-size: var(--text-body);
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-secondary);
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-normal) ease;
}

a:hover {
  color: var(--red);
}

img, svg {
  display: block;
  max-width: 100%;
}

button, input, textarea {
  font-family: var(--font-family);
  border: none;
  outline: none;
  background: none;
}

button {
  cursor: pointer;
}

ul, ol {
  list-style: none;
}

/* Label/tag typography */
.label {
  font-size: var(--text-label);
  font-weight: 500;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  line-height: 1.4;
  color: var(--text-muted);
}

/* Cross marks */
.cross-mark {
  font-size: 14px;
  font-weight: 300;
  color: var(--text-muted);
  line-height: 1;
  user-select: none;
}

.cross-marks-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 var(--page-padding);
  height: 50px;
}

.cross-marks-row--dark .cross-mark {
  color: #555555;
}

/* Pill button base */
.pill {
  position: relative;
  overflow: hidden;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-pill);
  font-size: var(--text-button);
  font-weight: 500;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  line-height: 1;
  cursor: pointer;
  transition: background-color var(--transition-hover-out) ease,
              color var(--transition-hover-out) ease,
              border-color var(--transition-hover-out) ease;
}

.pill:hover {
  transition-duration: var(--transition-hover-in);
}

.pill--primary {
  background-color: var(--pill-bg-dark);
  color: var(--text-on-dark);
}

.pill--primary:hover {
  /* hover-fill handles visual feedback */
}

.pill--secondary {
  background-color: var(--pill-bg-light);
  color: var(--text-primary);
}

.pill--secondary:hover {
  background-color: var(--pill-bg-light-hover);
}

.pill--outline {
  background-color: transparent;
  border: 1px solid var(--text-primary);
  color: var(--text-primary);
}

.pill--outline:hover {
  /* hover-fill handles visual feedback */
}

.pill--white {
  background-color: var(--bg-white);
  color: var(--bg-dark);
}

.pill--white:hover {
  /* hover-fill handles visual feedback */
}

/* Green status dot */
.status-dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--green);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.7; transform: scale(0.85); }
}

/* Section base */
.section {
  position: relative;
  width: 100%;
  overflow: hidden;
}

/* Page padding utility */
.page-padding {
  padding-left: var(--page-padding);
  padding-right: var(--page-padding);
}

/* Visually hidden (accessible) */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================
   Word Reveal — Clip-mask animation system
   Pure CSS @keyframes — NO rAF dependency
   Ref: lettersappearing.md

   How it works:
   1. .word-reveal__inner starts hidden (translateY 110%, rotated, opacity 0)
   2. IntersectionObserver adds .animate-in when container enters viewport
   3. CSS @keyframes runs the reveal animation
   4. animation-delay per word (set by JS) creates stagger effect
   ============================================ */

/* Outer mask — clips the word when it's translated below */
.word-reveal {
  display: inline-block;
  overflow: hidden;
  vertical-align: bottom;
  /* Extend clip area so descenders (g, p, q, ç) aren't cropped,
     then pull layout back up to keep line-height visually intact */
  padding-bottom: 0.2em;
  margin-bottom: -0.2em;
}

/* Inner word — hidden state */
.word-reveal__inner {
  display: inline-block;
  transform-origin: left bottom;
  transform: translateY(110%) rotate(12deg);
  opacity: 0;
}

/* THE ANIMATION: triggered by .animate-in class */
.word-reveal__inner.animate-in {
  animation: wordRevealIn 1.2s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  /* animation-delay is set per-word by JS for stagger */
}

@keyframes wordRevealIn {
  0% {
    transform: translateY(110%) rotate(12deg);
    opacity: 0;
  }
  100% {
    transform: translateY(0%) rotate(0deg);
    opacity: 1;
  }
}

/* ============================================
   Opacity Word Reveal — body text words
   CSS transition triggered by .animate-in
   ============================================ */
.opacity-word {
  display: inline-block;
  opacity: 0.12;
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
  /* transition-delay is set per-word by JS for stagger */
}

.opacity-word.animate-in {
  opacity: 1;
}

/* ============================================
   Entrance Animations (CSS transitions + .is-visible)
   IntersectionObserver adds .is-visible when element enters viewport
   ============================================ */

/* --- Product hero cards --- */
.products__hero-card {
  opacity: 0;
  transform: scale(0.95) translateY(30px);
  transition: opacity 0.8s var(--ease-expo-out),
              transform 0.8s var(--ease-expo-out);
}

.products__hero-card.is-visible {
  opacity: 1;
  transform: scale(1) translateY(0);
}

.products__hero-card:nth-child(2) {
  transition-delay: 0.15s;
}

/* --- Capability cards --- */
.products__capability-card {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.7s var(--ease-expo-out),
              transform 0.7s var(--ease-expo-out);
}

.products__capability-card.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.products__capability-card:nth-child(2) { transition-delay: 0.1s; }
.products__capability-card:nth-child(3) { transition-delay: 0.05s; }
.products__capability-card:nth-child(4) { transition-delay: 0.15s; }
.products__capability-card:nth-child(5) { transition-delay: 0.1s; }
.products__capability-card:nth-child(6) { transition-delay: 0.2s; }

/* --- Cross marks --- */
.cross-marks-row .cross-mark {
  opacity: 0;
  transition: opacity 0.4s ease;
}

.cross-marks-row.is-visible .cross-mark { opacity: 1; }
.cross-marks-row.is-visible .cross-mark:nth-child(1) { transition-delay: 0.1s; }
.cross-marks-row.is-visible .cross-mark:nth-child(2) { transition-delay: 0.15s; }
.cross-marks-row.is-visible .cross-mark:nth-child(3) { transition-delay: 0.2s; }
.cross-marks-row.is-visible .cross-mark:nth-child(4) { transition-delay: 0.25s; }
.cross-marks-row.is-visible .cross-mark:nth-child(5) { transition-delay: 0.3s; }

/* --- CTA content + form --- */
.cta__content {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s var(--ease-expo-out),
              transform 1s var(--ease-expo-out);
}

.cta__content.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.cta__form {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-expo-out) 0.3s,
              transform 0.8s var(--ease-expo-out) 0.3s;
}

.cta__form.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- About digital-twin stage --- */
.about__twin {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 1s var(--ease-expo-out),
              transform 1s var(--ease-expo-out);
}

.about__twin.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- About stats --- */
.about__stat {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-expo-out),
              transform 0.6s var(--ease-expo-out);
}

.about__stat.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.about__stat:nth-child(2) { transition-delay: 0.1s; }
.about__stat:nth-child(3) { transition-delay: 0.2s; }

/* --- Statement image --- */
.statement__image {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease-expo-out),
              transform 0.8s var(--ease-expo-out);
}

.statement__image.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Statement body wrap --- */
.statement__body-wrap {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.7s var(--ease-expo-out),
              transform 0.7s var(--ease-expo-out);
}

.statement__body-wrap.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Footer columns --- */
.footer__col {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s var(--ease-expo-out),
              transform 0.6s var(--ease-expo-out);
}

.footer__col.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.footer__col:nth-child(2) { transition-delay: 0.1s; }
.footer__col:nth-child(3) { transition-delay: 0.2s; }

/* Body text max-width for comfortable reading */
.statement__body,
.about__body,
.about__body--secondary {
  max-width: 680px;
}

/* Reduced motion: disable all animations for accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .word-reveal__inner {
    transform: none !important;
    opacity: 1 !important;
  }
  .opacity-word {
    opacity: 1 !important;
  }
}

/* Selection */
::selection {
  background-color: var(--red);
  color: var(--text-on-dark);
}