:root {
  --color-primary: #2E6DA4;
  --color-accent-blue: #2563EB;
  --color-sky: #C9DFF2;
  --color-text: #222;
  --color-text-dark: #22303D;
  --color-text-muted: #5B6B78;
  --color-white: #fff;
  --color-border: #E2E5E9;

  /* Paleta eco */
  --color-eco-dark: #1F5A44;
  --color-eco: #2E8B57;
  --color-eco-light: #6FBE8C;
  --color-eco-pale: #E5F4EC;
  --color-eco-accent: #A8D5BA;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Poppins', -apple-system, "Segoe UI", Roboto, Arial, sans-serif;
  background: #FBFCFA;
  color: var(--color-text);
  overflow-x: hidden;
}

a { color: var(--color-eco); text-decoration: none; }

/* ---------- Header ---------- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 6%;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text-dark);
}

.logo-img { width: 36px; height: 36px; border-radius: 9px; object-fit: cover; }

.logo-fallback {
  width: 36px; height: 36px; border-radius: 9px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent-blue));
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 1.1rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 24px;
  border-radius: 999px;
  font-weight: 600;
  font-size: 0.92rem;
  cursor: pointer;
  border: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

.btn-primary {
  background: linear-gradient(135deg, var(--color-eco), var(--color-eco-dark));
  color: #fff;
  box-shadow: 0 8px 20px rgba(46, 139, 87, 0.3);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 26px rgba(46, 139, 87, 0.38); }

.btn-secondary {
  background: #fff;
  color: var(--color-eco-dark);
  border: 1.5px solid var(--color-eco);
}
.btn-secondary:hover { background: var(--color-eco-pale); transform: translateY(-2px); }

.btn-lg { padding: 15px 34px; font-size: 1.02rem; }

/* ---------- Hero ---------- */
.sus-hero {
  position: relative;
  padding: 90px 6% 100px;
  background: radial-gradient(120% 120% at 15% 0%, #2A7A57 0%, #1F5A44 55%, #143A2C 100%);
  overflow: hidden;
  text-align: center;
}

.sus-hero-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.35;
}

.sus-hero-blob-1 {
  width: 420px; height: 420px;
  background: var(--color-eco-light);
  top: -160px; left: -120px;
}

.sus-hero-blob-2 {
  width: 380px; height: 380px;
  background: #F4D35E;
  bottom: -180px; right: -100px;
  opacity: 0.2;
}

.sus-hero-inner {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
}

.sus-eyebrow {
  display: inline-block;
  background: rgba(255, 255, 255, 0.14);
  color: #fff;
  font-weight: 600;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 7px 18px;
  border-radius: 999px;
  margin-bottom: 20px;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.sus-hero h1 {
  color: #fff;
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 800;
  line-height: 1.28;
  margin-bottom: 18px;
}

.sus-highlight {
  color: var(--color-eco-accent);
  font-style: italic;
  font-weight: 700;
}

.sus-hero p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 1.03rem;
  line-height: 1.75;
}

/* ---------- Stats strip ---------- */
.sus-stats-strip { background: #fff; border-bottom: 1px solid var(--color-border); }

.sus-stats-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 34px 6%;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  transform: translateY(-50px);
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 16px 40px rgba(20, 58, 44, 0.12);
}

.sus-stat-item {
  text-align: center;
  padding: 10px;
  border-right: 1px solid var(--color-border);
}
.sus-stat-item:last-child { border-right: none; }

.sus-stat-number {
  display: block;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 800;
  color: var(--color-eco);
  margin-bottom: 4px;
}

.sus-stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  font-weight: 500;
}

/* ---------- Sections ---------- */
.sus-section {
  max-width: 1150px;
  margin: 0 auto;
  padding: 40px 6% 80px;
}

.sus-section-alt {
  max-width: none;
  background: var(--color-eco-pale);
  padding: 80px 6%;
}

.sus-section-alt > * { max-width: 1150px; margin-left: auto; margin-right: auto; }

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 48px;
}

.section-eyebrow {
  display: inline-block;
  color: var(--color-eco);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 10px;
}

.section-head h2 {
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 800;
  color: var(--color-text-dark);
  line-height: 1.3;
}

/* ---------- Pillars ---------- */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.pillar-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 18px;
  padding: 28px 24px;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.pillar-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 16px 32px rgba(31, 90, 68, 0.12);
}

.pillar-icon {
  width: 54px;
  height: 54px;
  border-radius: 16px;
  background: var(--color-eco-pale);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.pillar-card h4 {
  font-size: 1.02rem;
  color: var(--color-text-dark);
  margin-bottom: 8px;
  font-weight: 700;
}

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

/* ---------- Initiatives ---------- */
.initiatives-list {
  position: relative;
  max-width: 780px;
  margin: 0 auto;
  padding-left: 28px;
  border-left: 3px solid var(--color-eco-accent);
}

.initiative-row {
  position: relative;
  padding-bottom: 36px;
}

.initiative-row:last-child { padding-bottom: 0; }

.initiative-row::before {
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--color-eco);
  border: 3px solid #fff;
  box-shadow: 0 0 0 2px var(--color-eco-accent);
}

.initiative-year {
  display: inline-block;
  font-size: 0.78rem;
  font-weight: 800;
  color: var(--color-eco);
  background: var(--color-eco-pale);
  padding: 4px 12px;
  border-radius: 999px;
  margin-bottom: 10px;
}

.initiative-body h4 {
  font-size: 1rem;
  color: var(--color-text-dark);
  font-weight: 700;
  margin-bottom: 6px;
}

.initiative-body p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: 620px;
}

/* ---------- Tips ---------- */
.tips-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.tip-card {
  display: flex;
  gap: 14px;
  align-items: flex-start;
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: 16px;
  padding: 20px 22px;
}

.tip-number {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--color-eco);
  color: #fff;
  font-weight: 800;
  font-size: 0.88rem;
  display: flex;
  align-items: center;
  justify-content: center;
}

.tip-card p {
  font-size: 0.88rem;
  color: var(--color-text);
  line-height: 1.6;
}

/* ---------- CTA final ---------- */
.sus-cta {
  background: radial-gradient(120% 140% at 85% 100%, #2A7A57 0%, #1F5A44 55%, #143A2C 100%);
  padding: 70px 6%;
  text-align: center;
}

.sus-cta-inner { max-width: 560px; margin: 0 auto; }

.sus-cta h2 {
  color: #fff;
  font-size: clamp(1.5rem, 3.4vw, 2.1rem);
  font-weight: 800;
  margin-bottom: 14px;
}

.sus-cta p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.98rem;
  line-height: 1.65;
  margin-bottom: 28px;
}

/* ---------- Footer ---------- */
.sus-footer {
  text-align: center;
  padding: 30px 6%;
  background: #143A2C;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.82rem;
}

.sus-footer-links {
  margin-top: 10px;
  display: flex;
  justify-content: center;
  gap: 10px;
  flex-wrap: wrap;
}

.sus-footer-links a { color: rgba(255, 255, 255, 0.75); }
.sus-footer-links a:hover { color: #fff; text-decoration: underline; }
.sus-footer-links span { color: rgba(255, 255, 255, 0.35); }

/* ---------- Responsive ---------- */
@media (max-width: 980px) {
  .pillars-grid { grid-template-columns: repeat(2, 1fr); }
  .tips-grid { grid-template-columns: 1fr; }
  .sus-stats-inner { grid-template-columns: repeat(2, 1fr); row-gap: 24px; }
  .sus-stat-item:nth-child(2) { border-right: none; }
}

@media (max-width: 640px) {
  .navbar { padding: 12px 5%; }
  .sus-hero { padding: 60px 6% 90px; }
  .pillars-grid { grid-template-columns: 1fr; }
  .sus-stats-inner { grid-template-columns: 1fr; }
  .sus-stat-item { border-right: none; border-bottom: 1px solid var(--color-border); padding-bottom: 16px; }
  .sus-stat-item:last-child { border-bottom: none; }
  .initiatives-list { padding-left: 22px; }
  .initiative-row::before { left: -28px; }
}
/* =============================================================================
   Responsive — refuerzo para todos los dispositivos
   (móviles muy pequeños, tablets, laptops, monitores grandes y TV)
   ============================================================================= */

/* Red de seguridad global (el body ya tenía overflow-x: hidden; se
   añade también a html e imágenes por si acaso). */
html {
  width: 100%;
  overflow-x: hidden;
}

img, video, iframe, svg {
  max-width: 100%;
  height: auto;
}

/* --- Tablets (641px–979px): paso intermedio de 2 columnas en los
   consejos para viajeros, que antes saltaban directo de 3 a 1 --- */
@media (min-width: 641px) and (max-width: 979px) {
  .tips-grid { grid-template-columns: repeat(2, 1fr); }
}

/* --- Móviles muy pequeños (320px–374px) --- */
@media (max-width: 374px) {
  .navbar { padding: 10px 4%; gap: 10px; }
  .nav-brand { font-size: 1rem; }
  .btn { padding: 9px 16px; font-size: 0.82rem; }
  .sus-hero { padding: 50px 5% 80px; }
  .sus-hero p { font-size: 0.94rem; }
  .sus-stats-inner { padding: 24px 5%; transform: translateY(-36px); }
  .pillar-card, .tip-card { padding: 18px 16px; }
  .initiatives-list { padding-left: 18px; }
  .initiative-row::before { left: -24px; width: 12px; height: 12px; }
}

/* --- Móviles en horizontal (poca altura) --- */
@media (max-height: 480px) and (orientation: landscape) {
  .sus-hero { padding: 40px 6% 60px; }
  .sus-hero-blob { display: none; }
}

/* --- Monitores grandes y televisores (1600px en adelante) --- */
@media (min-width: 1600px) {
  html { font-size: 17px; }
  .navbar { padding: 18px 4%; }
  .sus-hero-inner { max-width: 940px; }
  .sus-stats-inner,
  .sus-section,
  .sus-section-alt > * {
    max-width: 1360px;
  }
  .initiatives-list { max-width: 900px; }
}

/* --- Televisores 4K / pantallas ultra anchas (2200px en adelante) --- */
@media (min-width: 2200px) {
  html { font-size: 19px; }
  .sus-hero-inner { max-width: 1080px; }
  .sus-stats-inner,
  .sus-section,
  .sus-section-alt > * {
    max-width: 1560px;
  }
  .initiatives-list { max-width: 1020px; }
}