/* ═══════════════════════════════════════════════════════════════
   CAIA – Centro Andino de Investigación Aplicada
   styles.css – Main Stylesheet
   ═══════════════════════════════════════════════════════════════ */

/* ─── CSS Variables ─────────────────────────────────────────── */
:root {
  /* Brand Colors */
  --color-primary:       #0A1628;
  --color-primary-mid:   #0D2047;
  --color-accent:        #00C2CB;
  --color-accent-alt:    #0077B6;
  --color-accent-glow:   rgba(0, 194, 203, 0.15);

  /* Surface Colors */
  --color-white:         #FFFFFF;
  --color-off-white:     #F8FAFC;
  --color-surface-light: #F1F5F9;
  --color-surface-dark:  #0B1C36;
  --color-surface-card:  #FFFFFF;
  --color-border:        #E2E8F0;
  --color-border-dark:   rgba(255,255,255,0.08);

  /* Text Colors */
  --color-text-primary:  #0A1628;
  --color-text-secondary:#4A6080;
  --color-text-muted:    #94A3B8;
  --color-text-on-dark:  #CBD5E1;
  --color-text-light:    #FFFFFF;

  /* Typography */
  --font-body:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Space Grotesk', 'Inter', system-ui, sans-serif;

  /* Spacing */
  --space-xs:   0.25rem;
  --space-sm:   0.5rem;
  --space-md:   1rem;
  --space-lg:   1.5rem;
  --space-xl:   2rem;
  --space-2xl:  3rem;
  --space-3xl:  4.5rem;
  --space-4xl:  6rem;

  /* Sizing */
  --container-max: 1200px;
  --radius-sm:  6px;
  --radius-md:  12px;
  --radius-lg:  20px;
  --radius-xl:  28px;
  --nav-height: 72px;

  /* Shadows */
  --shadow-sm:  0 1px 4px rgba(10,22,40,0.06), 0 1px 2px rgba(10,22,40,0.04);
  --shadow-md:  0 4px 16px rgba(10,22,40,0.10), 0 1px 4px rgba(10,22,40,0.06);
  --shadow-lg:  0 12px 40px rgba(10,22,40,0.14), 0 2px 8px rgba(10,22,40,0.08);
  --shadow-accent: 0 4px 24px rgba(0, 194, 203, 0.20);

  /* Transitions */
  --ease-out:  cubic-bezier(0.22, 0.68, 0, 1.2);
  --ease-in:   cubic-bezier(0.55, 0, 1, 0.45);
  --ease-std:  cubic-bezier(0.4, 0, 0.2, 1);
  --dur-fast:  0.18s;
  --dur-std:   0.30s;
  --dur-slow:  0.60s;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-height);
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.65;
  color: var(--color-text-primary);
  background: var(--color-white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

button { cursor: pointer; font-family: inherit; }

input, textarea, select {
  font-family: inherit;
  font-size: 1rem;
}

/* ─── Container ─────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-xl);
}

/* ─── Buttons ───────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 0.7rem 1.6rem;
  border-radius: var(--radius-md);
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 2px solid transparent;
  transition: background var(--dur-std) var(--ease-std),
              color      var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std),
              transform  var(--dur-fast) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std);
}

.btn:focus-visible {
  outline: 3px solid var(--color-accent);
  outline-offset: 3px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-primary);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background: #00d8e3;
  border-color: #00d8e3;
  box-shadow: var(--shadow-accent);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--color-white);
  border-color: rgba(255,255,255,0.35);
}

.btn-outline:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(255,255,255,0.65);
  transform: translateY(-1px);
}

.btn-sm {
  padding: 0.5rem 1.1rem;
  font-size: 0.82rem;
}

/* ─── Section Shared ────────────────────────────────────────── */
.section {
  padding-block: var(--space-4xl);
}

.section-white { background: var(--color-white); }
.section-light { background: var(--color-off-white); }
.section-dark  {
  background: var(--color-primary);
  color: var(--color-text-light);
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin-inline: auto;
  margin-bottom: var(--space-3xl);
}

.section-tag {
  display: inline-block;
  padding: 0.3rem 0.9rem;
  background: var(--color-accent-glow);
  color: var(--color-accent);
  border-radius: 100px;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: var(--space-md);
  border: 1px solid rgba(0,194,203,0.2);
}

.section-dark .section-tag {
  background: rgba(0,194,203,0.12);
  border-color: rgba(0,194,203,0.3);
}

.r2i-tag {
  background: var(--color-primary);
  color: var(--color-accent);
  border-color: var(--color-accent);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 3.5vw, 2.6rem);
  font-weight: 700;
  line-height: 1.2;
  color: inherit;
  margin-bottom: var(--space-lg);
}

.section-dark .section-title { color: var(--color-white); }

.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

.section-dark .section-lead { color: var(--color-text-on-dark); }

/* ─── NAVBAR ────────────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  background: rgba(10, 22, 40, 0.92);
  backdrop-filter: blur(16px) saturate(160%);
  -webkit-backdrop-filter: blur(16px) saturate(160%);
  border-bottom: 1px solid var(--color-border-dark);
  transition: background var(--dur-std) var(--ease-std),
              box-shadow  var(--dur-std) var(--ease-std);
}

.navbar.scrolled {
  background: rgba(10, 22, 40, 0.98);
  box-shadow: 0 2px 24px rgba(0,0,0,0.25);
}

.nav-container {
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-xl);
  height: 100%;
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.nav-brand {
  display: flex;
  flex-direction: column;
  line-height: 1;
  flex-shrink: 0;
  transition: opacity var(--dur-fast);
}

.nav-brand:hover { opacity: 0.85; }

.brand-logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  color: var(--color-accent);
}

.brand-sub {
  font-size: 0.58rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-top: 1px;
}

.nav-menu { flex: 1; }

.nav-list {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  justify-content: center;
}

.nav-link {
  padding: 0.4rem 0.75rem;
  font-size: 0.86rem;
  font-weight: 500;
  color: rgba(255,255,255,0.72);
  border-radius: var(--radius-sm);
  transition: color var(--dur-fast), background var(--dur-fast);
  white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-white);
  background: rgba(255,255,255,0.07);
}

.nav-cta {
  flex-shrink: 0;
  white-space: nowrap;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  margin-left: auto;
}

.toggle-bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-white);
  border-radius: 2px;
  transition: transform var(--dur-std) var(--ease-std),
              opacity  var(--dur-std) var(--ease-std);
  transform-origin: center;
}

/* ─── HERO ──────────────────────────────────────────────────── */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--color-primary);
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 70% 60% at 60% 40%, rgba(0,119,182,0.18) 0%, transparent 70%),
    radial-gradient(ellipse 50% 50% at 20% 80%, rgba(0,194,203,0.12) 0%, transparent 60%),
    linear-gradient(160deg, rgba(10,22,40,0.70) 0%, rgba(10,22,40,0.30) 100%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-block: calc(var(--nav-height) + var(--space-3xl)) var(--space-4xl);
  max-width: 760px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0.4rem 1rem;
  background: rgba(0,194,203,0.12);
  border: 1px solid rgba(0,194,203,0.3);
  border-radius: 100px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-xl);
}

.badge-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-accent);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

.hero-brand {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 8rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--color-white);
  line-height: 1;
  margin-bottom: var(--space-sm);
  background: linear-gradient(135deg, #fff 40%, var(--color-accent) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-title { margin-bottom: var(--space-sm); }

.hero-subtitle {
  font-family: var(--font-display);
  font-size: clamp(1rem, 2.2vw, 1.3rem);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--space-xl);
}

.hero-statement {
  font-family: var(--font-display);
  font-size: clamp(1.3rem, 2.8vw, 1.85rem);
  font-weight: 600;
  line-height: 1.35;
  color: var(--color-white);
  margin-bottom: var(--space-lg);
}

.hero-description {
  font-size: 1.05rem;
  line-height: 1.75;
  color: rgba(255,255,255,0.65);
  max-width: 600px;
  margin-bottom: var(--space-2xl);
}

.hero-actions {
  display: flex;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-xl);
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  animation: scroll-bounce 2.5s ease-in-out infinite;
}

.scroll-text {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
}

.scroll-arrow {
  font-size: 1rem;
  color: rgba(255,255,255,0.35);
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(8px); }
}

/* ─── ABOUT GRID ────────────────────────────────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-xl);
}

.about-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-2xl);
  transition: transform var(--dur-std) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std);
}

.about-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.about-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  margin-bottom: var(--space-lg);
}

.about-card h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.about-card p {
  font-size: 0.92rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ─── PROBLEM GRID ──────────────────────────────────────────── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-lg);
}

.problem-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  position: relative;
  overflow: hidden;
  transition: background var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std),
              transform    var(--dur-std) var(--ease-std);
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  opacity: 0;
  transition: opacity var(--dur-std) var(--ease-std);
}

.problem-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(0,194,203,0.3);
  transform: translateY(-3px);
}

.problem-card:hover::before { opacity: 1; }

.problem-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  color: rgba(0,194,203,0.25);
  line-height: 1;
  margin-bottom: var(--space-md);
  letter-spacing: -0.02em;
  transition: color var(--dur-std) var(--ease-std);
}

.problem-card:hover .problem-number { color: rgba(0,194,203,0.5); }

.problem-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.problem-card p {
  font-size: 0.9rem;
  color: var(--color-text-on-dark);
  line-height: 1.65;
}

/* ─── R2I FLOW ──────────────────────────────────────────────── */
.r2i-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
  margin-bottom: var(--space-3xl);
}

.r2i-step {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.r2i-step-num {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent);
  background: var(--color-accent-glow);
  border: 1px solid rgba(0,194,203,0.25);
  border-radius: 100px;
  padding: 0.2rem 0.7rem;
  margin-bottom: var(--space-lg);
  position: relative;
  z-index: 2;
}

.r2i-step-body {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  height: 100%;
  text-align: center;
  transition: transform var(--dur-std) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std);
}

.r2i-step-body:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.r2i-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin: 0 auto var(--space-md);
}

.r2i-step-body h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
  line-height: 1.3;
}

.r2i-step-body p {
  font-size: 0.86rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

.r2i-connector {
  display: none;
}

.r2i-summary {
  text-align: center;
}

.r2i-quote {
  display: inline-block;
  max-width: 640px;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 500;
  line-height: 1.6;
  color: var(--color-primary);
  font-style: italic;
  padding: var(--space-xl) var(--space-2xl);
  background: var(--color-off-white);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

/* ─── SERVICES GRID ─────────────────────────────────────────── */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: var(--space-lg);
}

.service-card {
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--dur-std) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std);
  position: relative;
  overflow: hidden;
}

.service-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--dur-std) var(--ease-std);
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}

.service-card:hover::after { transform: scaleX(1); }

.service-icon {
  width: 32px;
  height: 32px;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
  transition: color var(--dur-std) var(--ease-std);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-sm);
}

.service-card p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ─── AUDIENCES ─────────────────────────────────────────────── */
.audiences-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-xl);
}

.audience-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  transition: background var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std),
              transform    var(--dur-std) var(--ease-std);
}

.audience-card:hover {
  background: rgba(255,255,255,0.07);
  border-color: rgba(0,194,203,0.35);
  transform: translateY(-4px);
}

.audience-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border-dark);
}

.audience-icon {
  width: 48px;
  height: 48px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.audience-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--color-white);
}

.audience-list { display: flex; flex-direction: column; gap: var(--space-sm); }

.audience-list li {
  font-size: 0.9rem;
  color: var(--color-text-on-dark);
  line-height: 1.55;
  padding-left: var(--space-lg);
  position: relative;
}

.audience-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--color-accent);
  opacity: 0.7;
}

/* ─── MISIÓN / VISIÓN ───────────────────────────────────────── */
.mv-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-2xl);
}

.mv-card {
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  padding: var(--space-3xl);
  position: relative;
  overflow: hidden;
  transition: transform var(--dur-std) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std);
}

.mv-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.mv-accent {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-alt));
}

.mv-label {
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-alt);
  margin-bottom: var(--space-lg);
  padding: 0.35rem 0.85rem;
  background: rgba(0,119,182,0.08);
  border-radius: 100px;
  display: inline-block;
}

.mv-text {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--color-text-secondary);
}

/* ─── FUTURE ────────────────────────────────────────────────── */
.future-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.future-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-lg);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform var(--dur-std) var(--ease-std),
              box-shadow var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std);
}

.future-item:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-accent);
}

.future-num {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  opacity: 0.4;
  line-height: 1;
  flex-shrink: 0;
  min-width: 40px;
  letter-spacing: -0.02em;
  transition: opacity var(--dur-std) var(--ease-std);
}

.future-item:hover .future-num { opacity: 0.9; }

.future-body h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-xs);
}

.future-body p {
  font-size: 0.88rem;
  color: var(--color-text-secondary);
  line-height: 1.65;
}

/* ─── WHY CAIA ──────────────────────────────────────────────── */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}

.why-card {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--color-border-dark);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: background var(--dur-std) var(--ease-std),
              border-color var(--dur-std) var(--ease-std),
              transform    var(--dur-std) var(--ease-std);
  position: relative;
}

.why-card:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(0,194,203,0.3);
  transform: translateY(-4px);
}

.why-icon {
  width: 40px;
  height: 40px;
  color: var(--color-accent);
  margin-bottom: var(--space-md);
}

.why-card h3 {
  font-family: var(--font-display);
  font-size: 0.98rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: var(--space-sm);
}

.why-card p {
  font-size: 0.88rem;
  color: var(--color-text-on-dark);
  line-height: 1.65;
}

/* ─── CONTACT ───────────────────────────────────────────────── */
.contact-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-3xl);
  margin-bottom: var(--space-3xl);
}

.contact-segments-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-secondary);
  margin-bottom: var(--space-lg);
}

.segment-buttons {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.segment-btn {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-lg);
  background: var(--color-off-white);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-secondary);
  transition: all var(--dur-std) var(--ease-std);
  text-align: left;
}

.segment-btn .seg-icon {
  width: 22px;
  height: 22px;
  flex-shrink: 0;
  color: var(--color-text-muted);
  transition: color var(--dur-std) var(--ease-std);
}

.segment-btn:hover,
.segment-btn.active {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: var(--color-white);
}

.segment-btn:hover .seg-icon,
.segment-btn.active .seg-icon {
  color: var(--color-accent);
}

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: 0.02em;
}

.form-group label span { color: var(--color-accent); }

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.7rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-off-white);
  color: var(--color-text-primary);
  font-size: 0.95rem;
  transition: border-color var(--dur-fast), box-shadow var(--dur-fast);
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%234A6080' d='M4 6l4 4 4-4'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group textarea { resize: vertical; min-height: 130px; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(0,194,203,0.12);
  background: var(--color-white);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
  border-color: #E53E3E;
  box-shadow: 0 0 0 3px rgba(229,62,62,0.10);
}

.field-error {
  font-size: 0.78rem;
  color: #E53E3E;
  min-height: 1rem;
}

.form-submit {
  align-self: flex-start;
  padding: 0.85rem 2.2rem;
  font-size: 0.95rem;
}

.form-success {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-lg);
  background: rgba(0,194,203,0.08);
  border: 1px solid rgba(0,194,203,0.25);
  border-radius: var(--radius-md);
  color: var(--color-accent-alt);
  animation: fade-in-up 0.4s var(--ease-out) both;
}

.form-success svg {
  width: 24px;
  height: 24px;
  flex-shrink: 0;
  color: var(--color-accent);
}

.form-success p {
  font-size: 0.92rem;
  font-weight: 500;
}

/* Contact Info Strip */
.contact-info {
  display: flex;
  gap: var(--space-3xl);
  padding: var(--space-xl) var(--space-2xl);
  background: var(--color-off-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
}

.contact-info-item {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.ci-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.ci-value {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--color-text-primary);
}

.ci-value:is(a):hover { color: var(--color-accent-alt); }

.ci-badge {
  display: inline-block;
  padding: 0.2rem 0.7rem;
  background: var(--color-accent-glow);
  border: 1px solid rgba(0,194,203,0.25);
  border-radius: 100px;
  color: var(--color-accent);
  font-size: 0.8rem;
}

/* ─── FOOTER ────────────────────────────────────────────────── */
.footer {
  background: var(--color-primary-mid);
  color: var(--color-text-on-dark);
  padding-top: var(--space-4xl);
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-3xl);
  padding-bottom: var(--space-3xl);
  border-bottom: 1px solid var(--color-border-dark);
}

.footer-logo {
  display: block;
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: 0.06em;
  color: var(--color-accent);
  margin-bottom: var(--space-xs);
}

.footer-name {
  display: block;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.45);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-xs);
}

.footer-model {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-accent);
  background: rgba(0,194,203,0.1);
  border: 1px solid rgba(0,194,203,0.2);
  border-radius: 100px;
  padding: 0.2rem 0.7rem;
  margin-bottom: var(--space-lg);
}

.footer-tagline {
  font-size: 0.9rem;
  line-height: 1.7;
  color: rgba(255,255,255,0.45);
  max-width: 340px;
}

.footer-nav-title {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.35);
  margin-bottom: var(--space-lg);
}

.footer-nav ul {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer-nav a {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  transition: color var(--dur-fast);
}

.footer-nav a:hover { color: var(--color-white); }

.footer-contact p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  margin-bottom: var(--space-sm);
}

.footer-contact a { transition: color var(--dur-fast); }
.footer-contact a:hover { color: var(--color-white); }

.footer-desc {
  font-size: 0.85rem;
  line-height: 1.6;
  color: rgba(255,255,255,0.4);
  margin-bottom: var(--space-lg);
}

.footer .btn-outline {
  border-color: rgba(255,255,255,0.2);
  font-size: 0.82rem;
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-block: var(--space-lg);
  gap: var(--space-lg);
}

.footer-bottom p {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}

.footer-bottom-r2i {
  font-family: var(--font-display);
  font-weight: 600;
  color: rgba(0,194,203,0.4) !important;
  letter-spacing: 0.06em;
}

/* ─── Scroll Reveal Animations ──────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  animation: fade-in-up 0.75s var(--ease-out) both;
}

.delay-1 { animation-delay: 0.10s; }
.delay-2 { animation-delay: 0.20s; }
.delay-3 { animation-delay: 0.35s; }
.delay-4 { animation-delay: 0.50s; }
.delay-5 { animation-delay: 0.65s; }
.delay-6 { animation-delay: 0.80s; }

@keyframes fade-in-up {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.65s var(--ease-std),
              transform 0.65s var(--ease-std);
}

.reveal.revealed {
  opacity: 1;
  transform: translateY(0);
}

.reveal.delay-1 { transition-delay: 0.08s; }
.reveal.delay-2 { transition-delay: 0.16s; }
.reveal.delay-3 { transition-delay: 0.24s; }
.reveal.delay-4 { transition-delay: 0.32s; }
.reveal.delay-5 { transition-delay: 0.40s; }
.reveal.delay-6 { transition-delay: 0.48s; }

/* ─── RESPONSIVE ────────────────────────────────────────────── */

/* Tablet – ≤ 1024px */
@media (max-width: 1024px) {
  .r2i-flow {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
  }

  .audiences-grid { grid-template-columns: 1fr; }

  .mv-grid { grid-template-columns: 1fr; gap: var(--space-xl); }

  .why-grid { grid-template-columns: repeat(2, 1fr); }

  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }

  .segment-buttons { flex-direction: row; flex-wrap: wrap; }
  .segment-btn { flex: 1; min-width: 180px; }

  .brand-sub { display: none; }
}

/* Tablet Portrait – ≤ 768px */
@media (max-width: 768px) {
  :root { --nav-height: 64px; }

  .container { padding-inline: var(--space-lg); }

  .section { padding-block: var(--space-3xl); }

  /* Navbar mobile */
  .nav-menu {
    position: fixed;
    top: var(--nav-height);
    left: 0;
    right: 0;
    background: rgba(10,22,40,0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--color-border-dark);
    padding: var(--space-lg);
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--dur-std) var(--ease-std),
                opacity   var(--dur-std) var(--ease-std);
    z-index: 999;
  }

  .nav-menu.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-xs);
  }

  .nav-link {
    padding: var(--space-md);
    font-size: 1rem;
    display: block;
  }

  .nav-toggle { display: flex; }

  .nav-cta { display: none; }

  /* Toggle animation */
  .nav-toggle.open .toggle-bar:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }
  .nav-toggle.open .toggle-bar:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
  }
  .nav-toggle.open .toggle-bar:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* Hero */
  .hero-content { padding-block: calc(var(--nav-height) + var(--space-2xl)) var(--space-3xl); }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }

  /* Sections */
  .about-grid { grid-template-columns: 1fr; }

  .problem-grid { grid-template-columns: 1fr; }

  .r2i-flow { grid-template-columns: 1fr; }

  .services-grid { grid-template-columns: 1fr; }

  .audiences-grid { grid-template-columns: 1fr; }

  .future-grid { grid-template-columns: 1fr; }

  .why-grid { grid-template-columns: 1fr; }

  .mv-grid { grid-template-columns: 1fr; }
  .mv-card { padding: var(--space-2xl); }

  .form-row { grid-template-columns: 1fr; }

  .contact-info {
    flex-direction: column;
    gap: var(--space-lg);
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
  }
  .footer-brand { grid-column: auto; }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: var(--space-sm);
  }

  .segment-buttons { flex-direction: column; }
  .segment-btn { min-width: auto; }
}

/* Mobile – ≤ 480px */
@media (max-width: 480px) {
  .container { padding-inline: var(--space-md); }

  .section-header { margin-bottom: var(--space-2xl); }

  .r2i-quote { font-size: 1rem; padding: var(--space-lg); }

  .about-card,
  .audience-card,
  .problem-card,
  .service-card,
  .why-card { padding: var(--space-lg); }
}

/* Reduce motion accessibility */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}