/* ============================================================
   Crystal Air — Landing v2
   Compact, rhythmic, alternating backgrounds, micro-motion
   ============================================================ */

:root {
  --ca-primary: #3B98EF;
  --ca-cyan: #00C3FF;
  --ca-soft: #46D2F1;
  --ca-ice: #A0EDFF;
  --ca-white: #FFFFFF;

  --ca-ink: #0E1F33;
  --ca-ink-soft: #2A3A4D;
  --ca-muted: #6B7787;
  --ca-line: #E5EAF0;
  --ca-tint: #F4F8FC;
  --ca-tint-2: #ECF4FB;
  --ca-dark: #0E1F33;
  --ca-dark-2: #122740;

  --font-display: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius: 14px;
  --radius-lg: 22px;
  --shadow-sm: 0 1px 3px rgba(14,31,51,.06), 0 1px 2px rgba(14,31,51,.04);
  --shadow-md: 0 6px 22px rgba(14,31,51,.08), 0 2px 6px rgba(14,31,51,.04);
  --shadow-lg: 0 20px 60px rgba(14,31,51,.12), 0 8px 24px rgba(14,31,51,.06);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  margin: 0;
  font-family: var(--font-body);
  font-size: 17px;
  line-height: 1.6;
  color: var(--ca-ink);
  background: var(--ca-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--ca-primary); text-decoration: none; }
a:hover { color: var(--ca-ink); }

.container {
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 28px;
}
.container.narrow { max-width: 820px; }

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 500;
  color: var(--ca-ink);
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
  line-height: 1.18;
}
h1 { font-size: clamp(2rem, 4.6vw, 3.6rem); font-weight: 500; overflow-wrap: break-word; }
h2 { font-size: clamp(1.55rem, 3.2vw, 2.4rem); overflow-wrap: break-word; }
h3 { font-size: clamp(1.1rem, 1.7vw, 1.35rem); }
h4 { font-size: 1.05rem; font-family: var(--font-body); font-weight: 600; }
p  { margin: 0 0 1em; color: var(--ca-ink-soft); }

@media (max-width: 480px) {
  h1 { font-size: 1.85rem; }
  h2 { font-size: 1.45rem; }
  .container { padding: 0 20px; }
}

.eyebrow {
  display: inline-block;
  text-transform: uppercase;
  font-size: 0.74rem;
  letter-spacing: 0.18em;
  color: var(--ca-primary);
  margin-bottom: 1em;
  font-weight: 600;
}
.eyebrow.centered { display: block; text-align: center; }
.eyebrow-light { color: var(--ca-ice); }

h2.centered, .centered { text-align: center; }
.light { color: #fff; }
.lead { font-size: 1.08rem; color: var(--ca-ink-soft); }
.lead-light { color: rgba(255,255,255,0.78); font-size: 1.05rem; }
.narrow-line { max-width: 640px; margin-left: auto; margin-right: auto; }

.link-arrow {
  display: inline-block;
  margin-top: 6px;
  color: var(--ca-primary);
  font-weight: 500;
  border-bottom: 1px solid transparent;
  padding-bottom: 1px;
}
.link-arrow:hover { border-bottom-color: var(--ca-primary); }

/* ============ MICRO-MOTION ============ */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .7s cubic-bezier(.2,.7,.3,1), transform .7s cubic-bezier(.2,.7,.3,1);
  will-change: opacity, transform;
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}
.reveal:nth-child(2)  { transition-delay: .06s; }
.reveal:nth-child(3)  { transition-delay: .12s; }
.reveal:nth-child(4)  { transition-delay: .18s; }
.reveal:nth-child(5)  { transition-delay: .24s; }
.reveal:nth-child(6)  { transition-delay: .30s; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
}

/* ============ HEADER ============ */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--ca-line);
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 28px;
  gap: 18px;
}
.brand img { height: 30px; width: auto; }
.nav-links { display: flex; gap: 26px; }
.nav-links a { color: var(--ca-ink-soft); font-weight: 500; font-size: 0.95rem; }
.nav-links a:hover { color: var(--ca-primary); }
@media (max-width: 820px) { .nav-links { display: none; } }

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 24px;
  border-radius: 999px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.98rem;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease;
  text-decoration: none;
  line-height: 1;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--ca-primary) 0%, var(--ca-soft) 100%);
  color: #fff;
  box-shadow: 0 6px 22px rgba(59,152,239,0.25);
}
.btn-primary:hover { color: #fff; box-shadow: 0 10px 32px rgba(59,152,239,0.35); }
.btn-ghost { background: transparent; color: var(--ca-ink); border-color: var(--ca-line); }
.btn-ghost:hover { background: var(--ca-tint); color: var(--ca-ink); border-color: var(--ca-primary); }
.btn-small { padding: 8px 16px; font-size: 0.88rem; }
.btn-large { padding: 17px 32px; font-size: 1.05rem; }

/* ============ HERO ============ */
.hero {
  position: relative;
  padding: clamp(56px, 7vw, 100px) 0 clamp(50px, 5vw, 80px);
  background:
    radial-gradient(900px 500px at 80% 0%, rgba(160, 237, 255, 0.55) 0%, rgba(160, 237, 255, 0) 70%),
    radial-gradient(700px 400px at 10% 100%, rgba(59, 152, 239, 0.20) 0%, rgba(59, 152, 239, 0) 70%),
    var(--ca-white);
  overflow: hidden;
}
.hero-inner { max-width: 900px; text-align: center; }
.hero-eyebrow {
  display: inline-block;
  text-transform: uppercase;
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  color: var(--ca-primary);
  font-weight: 600;
  padding: 6px 14px;
  background: rgba(59,152,239,0.10);
  border-radius: 999px;
  margin-bottom: 22px;
}
.hero h1 { margin-bottom: 22px; }
.h1-part { display: inline; }
@media (min-width: 720px) {
  .h1-part { display: block; }
}
.sub-hero {
  font-size: clamp(1.02rem, 1.5vw, 1.2rem);
  color: var(--ca-ink-soft);
  max-width: 720px;
  margin: 0 auto 32px;
  line-height: 1.55;
}
.cta-row {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  margin-bottom: 48px;
}
.hero-price { color: var(--ca-muted); font-size: 0.95rem; }
.hero-price strong { color: var(--ca-ink); font-weight: 600; }

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 600px;
  margin: 0 auto;
}
.stat {
  text-align: center;
  padding: 16px 8px;
  background: rgba(255,255,255,0.65);
  border: 1px solid rgba(59,152,239,0.18);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.stat-n {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(1.7rem, 3vw, 2.2rem);
  font-weight: 600;
  background: linear-gradient(135deg, var(--ca-primary), var(--ca-soft));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  line-height: 1;
  margin-bottom: 6px;
}
.stat-l { font-size: 0.82rem; color: var(--ca-muted); }

/* ============ SECTIONS ============ */
.section { padding: clamp(60px, 7vw, 96px) 0; }
.section-tinted { background: var(--ca-tint); }
.section-dark {
  background: linear-gradient(180deg, var(--ca-dark) 0%, var(--ca-dark-2) 100%);
  color: rgba(255,255,255,0.85);
}
.section-dark h2 { color: #fff; }
.section-dark p { color: rgba(255,255,255,0.7); }

/* ============ SPLIT ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
@media (max-width: 880px) { .split { grid-template-columns: 1fr; gap: 36px; } }

/* ============ SECTION 2 — AC DIAGRAM ============ */
.ac-diagram {
  width: 100%;
  height: auto;
  display: block;
  filter: drop-shadow(0 6px 24px rgba(14,31,51,0.08));
}
.diagram-caption {
  text-align: center;
  font-size: 0.88rem;
  color: var(--ca-muted);
  margin-top: 12px;
}

/* ============ SECTION 3 — PILLARS + STRIP ============ */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  margin: 44px 0 56px;
}
@media (max-width: 880px) { .pillars { grid-template-columns: 1fr; gap: 18px; } }
.pillar {
  background: #fff;
  border: 1px solid var(--ca-line);
  border-radius: var(--radius);
  padding: 28px 26px 26px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.pillar:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
  border-color: rgba(59,152,239,0.4);
}
.pillar-icon {
  width: 48px;
  height: 48px;
  color: var(--ca-primary);
  margin-bottom: 16px;
}
.pillar-icon svg { width: 100%; height: 100%; }
.pillar h3 { margin-bottom: 6px; }
.pillar p { margin: 0; color: var(--ca-ink-soft); }

.standards-strip {
  background: #fff;
  border: 1px solid var(--ca-line);
  border-radius: var(--radius-lg);
  padding: 26px 30px;
  margin-top: 12px;
}
.strip-label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--ca-muted);
  font-weight: 600;
  margin: 0 0 18px;
  text-align: center;
}
.strip-row {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
}
@media (max-width: 760px) { .strip-row { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 420px) { .strip-row { grid-template-columns: repeat(2, 1fr); } }
.strip-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--ca-ink-soft);
}
.strip-item svg {
  width: 28px;
  height: 28px;
  color: var(--ca-primary);
}

/* ============ SECTION 4 — TIMELINE ============ */
.visit-head {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: 28px;
  margin-bottom: 32px;
}
.visit-head h2 { margin: 0; }
@media (max-width: 720px) {
  .visit-head { grid-template-columns: 1fr; }
}
.visit-stats {
  display: flex;
  gap: 22px;
  flex-wrap: wrap;
}
.visit-stats span {
  color: var(--ca-muted);
  font-size: 0.92rem;
}
.visit-stats strong {
  color: var(--ca-ink);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1.1rem;
  margin-right: 4px;
}

.timeline {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}
@media (max-width: 880px) { .timeline { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 540px) { .timeline { grid-template-columns: 1fr; } }
.timeline li {
  display: grid;
  grid-template-columns: 40px 1fr;
  gap: 14px;
  padding: 18px 18px 18px 16px;
  background: #fff;
  border: 1px solid var(--ca-line);
  border-radius: var(--radius);
  align-items: start;
  transition: border-color .2s, transform .2s, box-shadow .2s;
}
.timeline li:hover {
  border-color: rgba(59,152,239,0.4);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.step-n {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ca-primary), var(--ca-soft));
  color: #fff;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 1rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.timeline h4 { margin: 4px 0 4px; }
.timeline p { margin: 0; color: var(--ca-ink-soft); font-size: 0.92rem; line-height: 1.45; }

/* ============ SECTION 5 — BEFORE/AFTER ============ */
.ba-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
  margin: 40px 0 20px;
}
@media (max-width: 880px) { .ba-grid { grid-template-columns: repeat(2, 1fr); gap: 14px; } }

.ba-card {
  all: unset;
  cursor: pointer;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.ba-stage {
  position: relative;
  aspect-ratio: 1/1;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 24px rgba(0,0,0,0.3);
  border: 1px solid rgba(255,255,255,0.1);
}
.ba-face {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  transition: opacity .55s cubic-bezier(.4,0,.2,1);
}
.ba-before {
  background: linear-gradient(135deg, #6B7787 0%, #3A4858 100%);
  opacity: 1;
}
.ba-after {
  background: linear-gradient(135deg, var(--ca-soft) 0%, var(--ca-primary) 100%);
  opacity: 0;
}
.ba-card.is-revealed .ba-before { opacity: 0; }
.ba-card.is-revealed .ba-after  { opacity: 1; }
.ba-tag {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  background: rgba(255,255,255,0.15);
  padding: 4px 12px;
  border-radius: 999px;
}
.ba-label {
  font-family: var(--font-display);
  font-size: 1.4rem;
  color: #fff;
  font-weight: 500;
}
.ba-caption {
  display: block;
  text-align: center;
  font-size: 0.9rem;
  color: rgba(255,255,255,0.7);
}

.caption-note-light {
  text-align: center;
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  margin-top: 20px;
}

/* ============ SECTION 6 — PLANT-BASED ============ */
.leaf-bg { position: relative; overflow: hidden; }
.leaf-bg::before,
.leaf-bg::after {
  content: "";
  position: absolute;
  width: 280px;
  height: 280px;
  background-image: radial-gradient(circle at center, rgba(70,210,241,0.18) 0%, transparent 60%);
  pointer-events: none;
}
.leaf-bg::before { top: -80px; left: -80px; }
.leaf-bg::after  { bottom: -80px; right: -80px; }

.two-block {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-top: 40px;
}
@media (max-width: 880px) { .two-block { grid-template-columns: 1fr; } }
.block {
  background: #fff;
  border: 1px solid var(--ca-line);
  border-radius: var(--radius);
  padding: 28px 26px;
  transition: box-shadow .2s, transform .2s;
}
.block:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.block h3 { margin: 14px 0 8px; }
.block p { margin: 0; }
.tag {
  display: inline-block;
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-weight: 600;
  padding: 5px 11px;
  border-radius: 999px;
}
.tag-included { background: rgba(59,152,239,0.12); color: var(--ca-primary); }
.tag-optional { background: rgba(107,119,135,0.12); color: var(--ca-muted); }

/* ============ SECTION 7 — SHR ============ */
.shr-tiny {
  list-style: none;
  padding: 0;
  margin: 18px 0 28px;
}
.shr-tiny li {
  padding: 10px 0 10px 28px;
  border-top: 1px solid var(--ca-line);
  position: relative;
  font-size: 0.96rem;
  color: var(--ca-ink-soft);
}
.shr-tiny li:first-child { border-top: 1px solid var(--ca-line); }
.shr-tiny li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 12px;
  height: 12px;
  border: 2px solid var(--ca-primary);
  border-radius: 50%;
}

.warranty-inline {
  display: grid;
  grid-template-columns: 56px 1fr;
  gap: 14px;
  align-items: center;
  padding: 18px;
  background: var(--ca-tint);
  border-radius: var(--radius);
  margin-top: 8px;
}
.warranty-inline strong { color: var(--ca-ink); }
.warranty-badge-mini {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--ca-primary), var(--ca-soft));
  color: #fff;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  box-shadow: var(--shadow-sm);
}
.warranty-badge-mini span { font-size: 1.4rem; font-weight: 600; line-height: 1; }
.warranty-badge-mini small { font-size: 0.62rem; text-transform: uppercase; letter-spacing: 0.1em; margin-top: 1px; }

.shr-deck {
  position: relative;
  aspect-ratio: 3/4;
  perspective: 1200px;
}
.shr-screen {
  position: absolute;
  width: 78%;
  border-radius: 10px;
  box-shadow: var(--shadow-lg);
  border: 1px solid rgba(255,255,255,0.6);
}
.shr-back      { top:  0%; left: 24%; transform: rotate(6deg);  opacity: .55; z-index: 1; }
.shr-mid       { top:  6%; left: 18%; transform: rotate(3deg);  opacity: .75; z-index: 2; }
.shr-front-mid { top: 12%; left:  9%; transform: rotate(-2deg); opacity: .92; z-index: 3; }
.shr-front     { top: 20%; left:  0%; transform: rotate(-5deg); z-index: 4; }
@media (max-width: 880px) {
  .shr-deck { aspect-ratio: 4/3; max-width: 520px; margin: 0 auto; }
}

/* ============ SECTION 8 — FAQ + FINAL CTA ============ */
.faq { margin-bottom: 48px; }
.faq details {
  border-bottom: 1px solid var(--ca-line);
  padding: 16px 0;
  cursor: pointer;
}
.faq details:first-child { border-top: 1px solid var(--ca-line); }
.faq summary {
  font-family: var(--font-display);
  font-size: 1.08rem;
  color: var(--ca-ink);
  font-weight: 500;
  padding-right: 32px;
  position: relative;
  list-style: none;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-body);
  font-size: 1.5rem;
  color: var(--ca-primary);
  font-weight: 300;
  line-height: 1;
}
.faq details[open] summary::after { content: "−"; }
.faq details p {
  margin-top: 10px;
  color: var(--ca-ink-soft);
  font-size: 0.96rem;
}

.final-cta {
  text-align: center;
  padding: 44px 28px;
  background: linear-gradient(135deg, var(--ca-tint-2) 0%, var(--ca-white) 100%);
  border: 1px solid var(--ca-line);
  border-radius: var(--radius-lg);
}
.price-callout {
  margin: 0 0 6px;
  color: var(--ca-ink-soft);
}
.price-callout strong {
  font-family: var(--font-display);
  font-size: 1.6rem;
  color: var(--ca-ink);
  font-weight: 600;
}
.hook {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--ca-ink);
  margin: 0 0 24px;
  font-style: italic;
}

/* ============ FOOTER ============ */
.site-footer {
  background: var(--ca-ink);
  color: rgba(255,255,255,0.78);
  padding: 48px 0 36px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: start;
}
@media (max-width: 720px) { .footer-inner { grid-template-columns: 1fr; gap: 24px; } }
.footer-brand img { height: 28px; filter: brightness(0) invert(1); margin-bottom: 12px; }
.footer-tagline {
  font-family: var(--font-display);
  font-style: italic;
  color: rgba(255,255,255,0.78);
  margin: 0;
}
.footer-meta { font-size: 0.92rem; }
.footer-meta p { color: rgba(255,255,255,0.7); margin: 0 0 5px; }
.footer-meta a { color: #fff; border-bottom: 1px solid rgba(255,255,255,0.3); }
@media (min-width: 721px) { .footer-meta { text-align: right; } }

/* ============ STICKY WHATSAPP ============ */
.sticky-wa {
  position: fixed;
  bottom: 22px;
  right: 22px;
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: #25D366;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4), 0 3px 8px rgba(0,0,0,0.12);
  z-index: 100;
  transition: transform .2s ease, box-shadow .2s ease;
}
.sticky-wa:hover {
  transform: scale(1.08);
  color: #fff;
  box-shadow: 0 12px 30px rgba(37, 211, 102, 0.5), 0 4px 10px rgba(0,0,0,0.15);
}

/* ============ COOKIE BANNER ============ */
.cookie-banner {
  position: fixed;
  bottom: 22px;
  left: 22px;
  right: 100px;
  max-width: 540px;
  background: #fff;
  border: 1px solid var(--ca-line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 16px 20px;
  z-index: 99;
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}
.cookie-banner[hidden] { display: none; }
.cookie-banner p { margin: 0; font-size: 0.9rem; flex: 1 1 240px; }
.cookie-actions { display: flex; gap: 8px; }
@media (max-width: 600px) {
  .cookie-banner { left: 12px; right: 12px; bottom: 92px; }
  .sticky-wa { width: 54px; height: 54px; bottom: 16px; right: 16px; }
}

@media print {
  .site-header, .sticky-wa, .cookie-banner, .site-footer { display: none; }
  .reveal { opacity: 1; transform: none; }
}