/* ============================================================
   Troverlo × LG Business Solutions — one-page microsite
   Warm editorial dark. Near-black surface + Troverlo Hydra Teal
   accent. Instrument Serif display, Inter body. Sibling of the
   Samsung Next microsite, retuned for LG.
   ============================================================ */

:root {
  /* Type scale */
  --text-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem + 0.5vw, 1.375rem);
  --text-xl:   clamp(1.5rem, 1.2rem + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem, 1.4rem + 2.4vw, 3.5rem);
  --text-hero: clamp(2.5rem, 1.5rem + 4vw, 5.5rem);

  /* Spacing */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Color — warm near-black surface, Hydra Teal accent */
  --color-bg:            #141210;
  --color-surface:       #1b1815;
  --color-surface-2:     #221e1a;
  --color-surface-3:     #2a2521;
  --color-divider:       #2e2a25;
  --color-border:        #3a352f;
  --color-text:          #ede9de;
  --color-text-muted:    #b3ab9c;
  --color-text-faint:    #7d766a;
  /* Hydra Teal #01696F is the brand anchor; brighter tints for
     legibility as text/links/glow on the warm dark surface. */
  --color-teal-brand:    #01696f;
  --color-primary:       #35a7ad;   /* teal, readable on dark */
  --color-primary-soft:  #5fc6cb;
  --color-primary-dim:   rgba(53, 167, 173, 0.15);
  --color-accent:        #7dd3d7;

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

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;

  --content-narrow: 720px;
  --content-default: 1120px;

  --transition: 220ms cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
  text-rendering: optimizeLegibility;
}

body {
  min-height: 100dvh;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  font-weight: 400;
  overflow-x: hidden;
}

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

a { color: inherit; text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-primary); }

p { text-wrap: pretty; max-width: 68ch; color: var(--color-text-muted); }

em { font-style: italic; color: var(--color-accent); }

h1, h2, h3 {
  text-wrap: balance;
  line-height: 1.1;
  color: var(--color-text);
  font-weight: 400;
}

::selection { background: var(--color-primary-dim); color: var(--color-text); }

/* ============================================================
   Layout
   ============================================================ */

.container {
  width: 100%;
  max-width: var(--content-default);
  margin: 0 auto;
  padding-inline: clamp(var(--space-5), 5vw, var(--space-10));
}
.container.narrow { max-width: var(--content-narrow); }

.section {
  padding-block: clamp(var(--space-16), 10vw, var(--space-32));
  position: relative;
}

.section + .section { border-top: 1px solid var(--color-divider); }

.section-tag {
  display: inline-block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-6);
}

.section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-6);
  max-width: 26ch;
}

.section p + p { margin-top: var(--space-4); }

/* ============================================================
   Header
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-4) clamp(var(--space-5), 5vw, var(--space-10));
  background: rgba(20, 18, 16, 0.72);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.02em;
  color: var(--color-primary);
}
.brand svg { color: var(--color-primary); }

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
}
.site-nav a { transition: color var(--transition); }
.site-nav a:hover { color: var(--color-text); }
.site-nav .cta-link {
  color: var(--color-primary);
  font-weight: 500;
}

@media (max-width: 820px) {
  .site-nav a:not(.cta-link) { display: none; }
}

/* ============================================================
   Hero
   ============================================================ */

.hero {
  position: relative;
  padding-block: clamp(var(--space-20), 14vw, var(--space-32));
  overflow: hidden;
}

.hero .container { position: relative; z-index: 2; max-width: var(--content-default); }

.eyebrow {
  display: inline-block;
  padding: 6px 12px;
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: var(--text-xs);
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-primary);
  margin-bottom: var(--space-8);
  background: rgba(53, 167, 173, 0.05);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  letter-spacing: -0.02em;
  line-height: 1.02;
  max-width: 16ch;
  margin-bottom: var(--space-8);
}
.hero h1 em {
  font-style: italic;
  color: var(--color-primary);
  display: block;
}

.lede {
  font-size: var(--text-lg);
  color: var(--color-text);
  max-width: 62ch;
  font-weight: 300;
  line-height: 1.5;
  margin-bottom: var(--space-12);
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-8);
  padding-top: var(--space-8);
  border-top: 1px solid var(--color-divider);
  max-width: 820px;
}
.meta-item { display: flex; flex-direction: column; gap: var(--space-1); }
.meta-label {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}
.meta-value {
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

@media (max-width: 640px) {
  .hero-meta { grid-template-columns: 1fr; gap: var(--space-4); }
}

/* Hero background — grid + glow */
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}
.grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(53, 167, 173, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(53, 167, 173, 0.06) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 60% at 70% 30%, black 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 90% 60% at 70% 30%, black 40%, transparent 100%);
}
.glow {
  position: absolute;
  top: -10%;
  right: -10%;
  width: 60vw;
  height: 60vw;
  background: radial-gradient(circle, rgba(1, 105, 111, 0.30) 0%, rgba(1, 105, 111, 0) 60%);
  filter: blur(40px);
}

/* ============================================================
   THE GAP — killer stat + metric strip
   ============================================================ */

.gap-hero {
  display: grid;
  grid-template-columns: minmax(280px, 380px) 1fr;
  gap: clamp(var(--space-8), 6vw, var(--space-16));
  align-items: start;
  margin-bottom: var(--space-16);
}
@media (max-width: 900px) {
  .gap-hero { grid-template-columns: 1fr; }
}

.gap-stat {
  background: linear-gradient(180deg, var(--color-surface-2), var(--color-surface));
  border: 1px solid rgba(53, 167, 173, 0.35);
  border-radius: var(--radius-lg);
  padding: var(--space-10) var(--space-8);
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 60px -20px rgba(1, 105, 111, 0.35);
}
.gap-stat::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(53, 167, 173, 0.15), transparent 60%);
  pointer-events: none;
}

.stat-value {
  position: relative;
  font-family: var(--font-display);
  font-size: clamp(4rem, 3rem + 6vw, 7.5rem);
  font-weight: 400;
  line-height: 0.95;
  color: var(--color-primary);
  letter-spacing: -0.03em;
  margin-bottom: var(--space-5);
}
.stat-unit {
  font-size: 0.5em;
  color: var(--color-primary-soft);
  margin-left: 0.05em;
}
.stat-caption {
  position: relative;
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.55;
  max-width: 34ch;
}

.gap-copy h2 { margin-bottom: var(--space-5); max-width: 24ch; }
.gap-copy p {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
}
.gap-copy p + p { margin-top: var(--space-4); }
.gap-copy a {
  color: var(--color-primary);
  border-bottom: 1px solid rgba(53, 167, 173, 0.4);
}
.gap-copy a:hover { color: var(--color-primary-soft); border-color: var(--color-primary-soft); }

.gap-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  padding-top: var(--space-10);
  border-top: 1px solid var(--color-divider);
}
@media (max-width: 780px) {
  .gap-metrics { grid-template-columns: repeat(2, 1fr); }
}

.metric {
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), transform var(--transition);
}
.metric:hover { border-color: rgba(53, 167, 173, 0.35); transform: translateY(-2px); }
.metric.highlight {
  background: linear-gradient(180deg, rgba(1, 105, 111, 0.20), var(--color-surface));
  border-color: rgba(53, 167, 173, 0.45);
}

.metric-num {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  margin-bottom: var(--space-2);
  line-height: 1;
}
.metric.highlight .metric-num { color: var(--color-primary-soft); }
.metric-label {
  font-size: var(--text-xs);
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  line-height: 1.4;
}

/* ============================================================
   Benefits grid — what LG gets
   ============================================================ */

.benefit-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-auto-rows: 1fr;
  gap: var(--space-5);
  margin-top: var(--space-10);
}
@media (max-width: 780px) {
  .benefit-grid { grid-template-columns: 1fr; }
}

.benefit {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition), transform var(--transition);
}
.benefit.lead {
  grid-column: 1 / -1;
  background: linear-gradient(180deg, rgba(1, 105, 111, 0.14), var(--color-surface));
  border-color: rgba(53, 167, 173, 0.4);
}
.benefit.lead h3 { font-size: var(--text-2xl); color: var(--color-primary-soft); max-width: 26ch; }
.benefit.lead p { font-size: var(--text-base); color: var(--color-text); max-width: 62ch; line-height: 1.65; }
.benefit:hover {
  border-color: rgba(53, 167, 173, 0.4);
  transform: translateY(-2px);
}

.benefit-num {
  display: block;
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-primary);
  margin-bottom: var(--space-3);
}
.benefit h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  margin-bottom: var(--space-3);
  line-height: 1.15;
}
.benefit p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

/* ============================================================
   Playbook — path list
   ============================================================ */

.playbook .lead-copy {
  font-size: var(--text-base);
  color: var(--color-text);
  line-height: 1.7;
  max-width: 66ch;
}

.path-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-10);
}

.path {
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: var(--space-8);
  padding: var(--space-8);
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  transition: border-color var(--transition);
}
.path:hover { border-color: rgba(53, 167, 173, 0.3); }

.path-index {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--text-lg);
  color: var(--color-primary);
  letter-spacing: 0.02em;
}
.path h3 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  margin-bottom: var(--space-3);
}
.path p { font-size: var(--text-base); color: var(--color-text-muted); }
.path a {
  color: var(--color-primary);
  border-bottom: 1px solid rgba(53, 167, 173, 0.4);
}
.path a:hover { color: var(--color-primary-soft); border-color: var(--color-primary-soft); }

@media (max-width: 780px) {
  .path { grid-template-columns: 1fr; gap: var(--space-3); padding: var(--space-6); }
}

/* ============================================================
   Proof strip
   ============================================================ */

.proof-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-5);
  margin-top: var(--space-10);
}
@media (max-width: 900px) {
  .proof-grid { grid-template-columns: 1fr; }
}

.proof-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  transition: border-color var(--transition), transform var(--transition);
}
.proof-card:hover { border-color: rgba(53, 167, 173, 0.35); transform: translateY(-2px); }
.proof-card.highlight {
  background: linear-gradient(180deg, rgba(1, 105, 111, 0.16), var(--color-surface));
  border-color: rgba(53, 167, 173, 0.45);
}
.proof-eyebrow {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-4);
}
.proof-headline {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-primary);
  line-height: 1.1;
  margin-bottom: var(--space-4);
}
.proof-card.highlight .proof-headline { color: var(--color-primary-soft); }
.proof-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}
.proof-card a {
  color: var(--color-primary);
  border-bottom: 1px solid rgba(53, 167, 173, 0.4);
}
.proof-card a:hover { color: var(--color-primary-soft); border-color: var(--color-primary-soft); }

/* ============================================================
   Contact
   ============================================================ */

.contact { padding-block: clamp(var(--space-16), 10vw, var(--space-24)); }
.contact h2 {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 400;
  color: var(--color-primary);
  margin-bottom: var(--space-4);
}
.contact p { font-size: var(--text-base); color: var(--color-text); max-width: 64ch; }

.signature-card {
  margin-top: var(--space-12);
  padding: var(--space-8);
  background: linear-gradient(180deg, var(--color-surface-2), var(--color-surface));
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-8);
  align-items: center;
}
@media (max-width: 780px) {
  .signature-card { grid-template-columns: 1fr; gap: var(--space-6); }
}

.sig-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: var(--color-text);
  margin-bottom: 4px;
}
.sig-role {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
}
.sig-lines {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  align-items: center;
}
.sig-lines a { color: var(--color-primary); }
.sig-lines span { color: var(--color-text-faint); }

.sig-ip {
  padding-inline-start: var(--space-8);
  border-left: 1px solid var(--color-divider);
}
@media (max-width: 780px) {
  .sig-ip { padding-inline-start: 0; padding-top: var(--space-6); border-left: 0; border-top: 1px solid var(--color-divider); }
}

.ip-label {
  font-size: var(--text-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-text-faint);
  margin-bottom: var(--space-2);
}
.ip-value { font-size: var(--text-sm); color: var(--color-text); font-weight: 500; }

/* ============================================================
   Footer
   ============================================================ */

.site-footer {
  padding-block: var(--space-8);
  border-top: 1px solid var(--color-divider);
  background: var(--color-bg);
}
.site-footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  letter-spacing: 0.04em;
}
.site-footer a { color: var(--color-primary); }
.site-footer a:hover { color: var(--color-primary-soft); }

/* ============================================================
   Reveal on scroll
   ============================================================ */

/* Reveal-on-scroll: JS-only enhancement.
   Base state is visible so no-JS users, crawlers, and
   fullpage screenshots see the content. When JS runs it
   adds .js-reveal to <html>, at which point .reveal starts
   hidden and animates in via IntersectionObserver. */
.js-reveal .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 800ms cubic-bezier(0.16, 1, 0.3, 1), transform 800ms cubic-bezier(0.16, 1, 0.3, 1);
}
.js-reveal .reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .js-reveal .reveal { opacity: 1; transform: none; }
}