/* ============================================================
   PASE MINERÍA — styles.css
   ============================================================ */

/* ---------- Variables ---------- */
:root {
  --bg-primary:   #0a0e1a;
  --bg-card:      #111827;
  --bg-alt:       #0f172a;
  --cyan:         #0ea5e9;
  --cyan-dark:    #0284c7;
  --orange:       #f97316;
  --orange-dark:  #ea6b0d;
  --text:         #f1f5f9;
  --text-muted:   #94a3b8;
  --border:       #1e3a5f;
  --border-light: #334155;
  --success:      #10b981;
  --error:        #ef4444;
  --nav-h:        72px;
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html  { scroll-behavior: smooth; }
body  {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg-primary);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a   { text-decoration: none; color: inherit; }
ul  { list-style: none; }

/* ---------- Utilities ---------- */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}
.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}
.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 580px;
  line-height: 1.7;
}
.accent-cyan   { color: var(--cyan); }
.accent-orange { color: var(--orange); }

/* Badge pill */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--cyan);
  border: 1px solid rgba(14,165,233,.4);
  background: rgba(14,165,233,.07);
  border-radius: 999px;
  padding: 0.32rem 0.9rem;
  margin-bottom: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.72rem 1.65rem;
  border-radius: 8px;
  font-size: 0.92rem;
  font-weight: 600;
  cursor: pointer;
  transition: all .2s ease;
  border: none;
  font-family: inherit;
}
.btn-primary {
  background: var(--cyan);
  color: #fff;
}
.btn-primary:hover {
  background: var(--cyan-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(14,165,233,.35);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border-light);
}
.btn-secondary:hover {
  border-color: var(--cyan);
  color: var(--cyan);
  transform: translateY(-2px);
}
.btn-orange {
  background: var(--orange);
  color: #fff;
}
.btn-orange:hover {
  background: var(--orange-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(249,115,22,.35);
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .6s ease, transform .6s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }
.fd1 { transition-delay: .1s; }
.fd2 { transition-delay: .2s; }
.fd3 { transition-delay: .3s; }
.fd4 { transition-delay: .4s; }


/* ============================================================
   NAVBAR
   ============================================================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  padding: 0 1.5rem;
  background: rgba(10,14,26,.85);
  transition: background .3s ease, box-shadow .3s ease;
}
#navbar.scrolled {
  background: rgba(10,14,26,.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 1px 0 var(--border);
}
.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  flex-shrink: 0;
}
.nav-logo img {
  height: 62px;
  width: auto;
  mix-blend-mode: screen;
  display: block;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links a {
  font-size: 0.88rem;
  color: var(--text-muted);
  transition: color .2s;
}
.nav-links a:hover { color: var(--text); }
.nav-cta { flex-shrink: 0; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  background: none;
  border: none;
  padding: 0.5rem;
}
.hamburger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}
.hamburger.active span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

/* Mobile menu */
.mobile-menu {
  display: none;
  position: fixed;
  top: var(--nav-h); left: 0; right: 0;
  background: rgba(10,14,26,.98);
  backdrop-filter: blur(12px);
  padding: 1.5rem;
  border-top: 1px solid var(--border);
  z-index: 999;
  flex-direction: column;
  gap: 0.25rem;
}
.mobile-menu.open { display: flex; }
.mobile-menu a {
  font-size: 0.95rem;
  color: var(--text-muted);
  padding: 0.75rem 0;
  border-bottom: 1px solid var(--border);
}
.mobile-menu a:last-child { border: none; }
.mobile-menu a:hover { color: var(--text); }
.mobile-menu .btn { justify-content: center; margin-top: 0.5rem; }


/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  /* Replace with an actual mining/mountain photo: */
  background:
    linear-gradient(135deg, rgba(10,14,26,.9) 0%, rgba(10,14,26,.72) 60%, rgba(14,165,233,.05) 100%),
    url('https://images.unsplash.com/photo-1506905925346-21bda4d32df4?w=1920&q=80') center / cover no-repeat;
  padding-top: var(--nav-h);
}
#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
}

.hero::before {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 75% 50%, rgba(14,165,233,.07) 0%, transparent 60%);
  pointer-events: none;
}

.hero-content {
  max-width: 760px;
  padding: 5rem 1.5rem;
  position: relative;
  z-index: 1;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: .07em;
  color: var(--cyan);
  border: 1px solid rgba(14,165,233,.35);
  background: rgba(14,165,233,.07);
  border-radius: 999px;
  padding: 0.38rem 1rem;
  margin-bottom: 1.5rem;
}
.hero-badge .dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%,100% { opacity:1; transform:scale(1); }
  50%      { opacity:.4; transform:scale(1.4); }
}

.hero h1 {
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 800;
  line-height: 1.13;
  margin-bottom: 1.3rem;
}
.hero h1 em { font-style: normal; color: var(--cyan); }

.hero-lead {
  font-size: 1.1rem;
  color: var(--text-muted);
  margin-bottom: 2rem;
  max-width: 600px;
  line-height: 1.75;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2.5rem;
}
.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 1.5rem;
}
.proof-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.83rem;
  color: var(--text-muted);
}
.proof-item svg { color: var(--orange); flex-shrink: 0; }


/* ============================================================
   STATS BAR
   ============================================================ */
.stats-bar {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 2.5rem 1.5rem;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}
.stat-number {
  font-size: 2.4rem;
  font-weight: 800;
  color: var(--cyan);
  line-height: 1;
  margin-bottom: 0.3rem;
}
.stat-label {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.4;
}


/* ============================================================
   EL PROBLEMA (antes/después)
   ============================================================ */
.problema { padding: 6rem 1.5rem; background: var(--bg-alt); }
.problema-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.problema-header .section-subtitle { margin: 0 auto; }

.problema-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  max-width: 920px;
  margin: 0 auto;
}
.prob-card {
  border-radius: 16px;
  padding: 2rem;
}
.prob-card.before {
  background: rgba(239,68,68,.05);
  border: 1px solid rgba(239,68,68,.3);
}
.prob-card.after {
  background: rgba(14,165,233,.05);
  border: 1px solid rgba(14,165,233,.3);
}
.prob-card-title {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.7rem;
}
.prob-card.before .prob-card-title { color: var(--error); }
.prob-card.after  .prob-card-title { color: var(--cyan); }

.prob-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.7rem;
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
  line-height: 1.55;
}
.icon-x     { color: var(--error);   flex-shrink: 0; margin-top: 2px; }
.icon-check { color: var(--success); flex-shrink: 0; margin-top: 2px; }


/* ============================================================
   LA PLATAFORMA
   ============================================================ */
.plataforma { padding: 6rem 1.5rem; background: var(--bg-primary); }
.plataforma-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.plataforma-header .section-subtitle { margin: 0 auto; }

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  max-width: 1100px;
  margin: 0 auto;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 1.75rem;
  transition: all .3s ease;
}
.feature-card:hover {
  border-color: var(--cyan);
  transform: translateY(-4px);
  box-shadow: 0 10px 40px rgba(14,165,233,.1);
}
.feat-icon {
  width: 48px; height: 48px;
  border-radius: 12px;
  background: rgba(14,165,233,.1);
  border: 1px solid rgba(14,165,233,.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  margin-bottom: 1.25rem;
}
.feature-card h3 { font-size: 1.02rem; font-weight: 700; margin-bottom: 0.5rem; }
.feature-card p  { font-size: 0.88rem; color: var(--text-muted); line-height: 1.65; }


/* ============================================================
   MÓDULOS
   ============================================================ */
.modulos { padding: 6rem 1.5rem; background: var(--bg-alt); }
.modulos-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.modulos-header .section-subtitle { margin: 0 auto; }

.modulos-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
  gap: 1.2rem;
  max-width: 1100px;
  margin: 0 auto;
}
.modulo-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.4rem;
  display: flex;
  gap: 1.1rem;
  align-items: flex-start;
  transition: all .3s ease;
}
.modulo-card:hover {
  border-color: var(--orange);
  transform: translateY(-3px);
  box-shadow: 0 8px 28px rgba(249,115,22,.1);
}
.mod-icon {
  width: 44px; height: 44px;
  border-radius: 10px;
  background: rgba(249,115,22,.1);
  border: 1px solid rgba(249,115,22,.22);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--orange);
  flex-shrink: 0;
}
.mod-body h3 { font-size: 0.93rem; font-weight: 700; margin-bottom: 0.3rem; }
.mod-body p  { font-size: 0.81rem; color: var(--text-muted); line-height: 1.5; margin-bottom: 0.5rem; }
.norm-badge {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--cyan);
  border: 1px solid rgba(14,165,233,.3);
  border-radius: 4px;
  padding: 0.12rem 0.45rem;
}


/* ============================================================
   MARCO NORMATIVO
   ============================================================ */
.normativa { padding: 6rem 1.5rem; background: var(--bg-primary); overflow: hidden; }
.normativa-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  max-width: 1100px;
  margin: 0 auto;
}
.normativa-text .section-title    { margin-bottom: 1rem; }
.normativa-text .section-subtitle { margin-bottom: 2rem; }

.norm-layers { display: flex; flex-direction: column; gap: 0.7rem; }
.norm-layer {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1rem;
  background: var(--bg-card);
  border-left: 3px solid var(--cyan);
  border-radius: 0 8px 8px 0;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.norm-layer.core {
  border-left-color: var(--orange);
  background: rgba(249,115,22,.06);
  font-weight: 700;
  color: var(--text);
}
.nl-num {
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--cyan);
  color: #000;
  font-size: 0.72rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.norm-layer.core .nl-num { background: var(--orange); }

/* Concentric circles (decorative) */
.concentric-wrap {
  position: relative;
  width: 320px; height: 320px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}
.c-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid;
  animation: rotateSlow linear infinite;
}
.c-ring:nth-child(1) { width:320px;height:320px; border-color:rgba(14,165,233,.12); animation-duration:70s; }
.c-ring:nth-child(2) { width:255px;height:255px; border-color:rgba(14,165,233,.2);  animation-duration:50s; animation-direction:reverse; }
.c-ring:nth-child(3) { width:192px;height:192px; border-color:rgba(14,165,233,.3);  animation-duration:35s; }
.c-ring:nth-child(4) { width:132px;height:132px; border-color:rgba(249,115,22,.38); animation-duration:22s; animation-direction:reverse; }

.c-core {
  position: absolute;
  width: 86px; height: 86px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(249,115,22,.25) 0%, rgba(249,115,22,.04) 100%);
  border: 2px solid var(--orange);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  font-size: 0.6rem;
  font-weight: 800;
  color: var(--orange);
  letter-spacing: .05em;
  line-height: 1.4;
  padding: 0.4rem;
}

@keyframes rotateSlow {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}


/* ============================================================
   BENEFICIOS
   ============================================================ */
.beneficios { padding: 6rem 1.5rem; background: var(--bg-alt); }
.beneficios-header {
  text-align: center;
  margin-bottom: 3.5rem;
}
.beneficios-header .section-subtitle { margin: 0 auto; }

.beneficios-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: 1000px;
  margin: 0 auto;
}
.ben-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 14px;
  padding: 2rem;
  transition: all .3s ease;
}
.ben-card:hover {
  border-color: var(--cyan);
  box-shadow: 0 8px 32px rgba(14,165,233,.1);
}
.ben-icon {
  width: 50px; height: 50px;
  border-radius: 13px;
  background: rgba(14,165,233,.1);
  border: 1px solid rgba(14,165,233,.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--cyan);
  margin-bottom: 1.1rem;
}
.ben-card h3 { font-size: 1.02rem; font-weight: 700; color: var(--orange); margin-bottom: 0.2rem; }
.ben-tag { font-size: 0.73rem; color: var(--text-muted); text-transform: uppercase; letter-spacing:.06em; margin-bottom: 1rem; display:block; }
.ben-list li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 0.55rem;
  line-height: 1.5;
}
.ben-list li svg { color: var(--success); flex-shrink: 0; margin-top: 2px; }


/* ============================================================
   RESPALDO PASE AOG
   ============================================================ */
.respaldo { padding: 6rem 1.5rem; background: var(--bg-primary); text-align: center; }
.respaldo-inner { max-width: 780px; margin: 0 auto; }

.respaldo-logo-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 2rem;
}
.respaldo-logo-row img {
  height: 36px; width: auto;
  filter: brightness(0) invert(1);
  opacity: .75;
}
.resp-div { width:1px; height:28px; background:var(--border-light); }
.respaldo-logo-row span { font-size:1rem; font-weight:600; color:var(--text-muted); }

.respaldo h2 { font-size: clamp(1.5rem,3.5vw,2.1rem); font-weight:700; margin-bottom:1.1rem; }
.respaldo p  { font-size:0.97rem; color:var(--text-muted); line-height:1.75; margin-bottom:2.5rem; }

.resp-metrics {
  display: flex;
  justify-content: center;
  gap: 3rem;
  flex-wrap: wrap;
  margin-bottom: 2.5rem;
}
.resp-metric .num   { display:block; font-size:2.2rem; font-weight:800; color:var(--cyan); line-height:1; margin-bottom:.22rem; }
.resp-metric .label { font-size:.82rem; color:var(--text-muted); }

.resp-link {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  color: var(--cyan);
  font-size: .92rem;
  font-weight: 600;
  transition: gap .2s;
}
.resp-link:hover { gap: 0.7rem; }


/* ============================================================
   CONTACTO
   ============================================================ */
.contacto { padding: 6rem 1.5rem; background: var(--bg-alt); }
.contacto-inner {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 4rem;
  max-width: 1000px;
  margin: 0 auto;
  align-items: start;
}
.contacto-info h2 { font-size:clamp(1.5rem,3vw,2rem); font-weight:700; margin-bottom:1rem; }
.contacto-info p  { color:var(--text-muted); line-height:1.75; margin-bottom:2rem; }

.contact-items { display:flex; flex-direction:column; gap:0.9rem; }
.contact-item {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  font-size: 0.88rem;
  color: var(--text-muted);
}
.contact-item svg { color:var(--cyan); flex-shrink:0; }

/* Form */
.form-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 2rem;
}
.form-row { display:grid; grid-template-columns:1fr 1fr; gap:1rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display:block; font-size:.82rem; font-weight:600; color:var(--text-muted); margin-bottom:.4rem; }

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-primary);
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: .65rem .9rem;
  font-size: .88rem;
  color: var(--text);
  font-family: inherit;
  outline: none;
  transition: border-color .2s;
  appearance: none;
  -webkit-appearance: none;
}
.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.75rem center;
  padding-right: 2.5rem;
}
.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus { border-color: var(--cyan); }
.form-group textarea { min-height: 108px; resize: vertical; }
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-muted); opacity:.55; }

.form-submit { width:100%; padding:.85rem; font-size:.97rem; }

.form-feedback {
  margin-top: 1rem;
  padding: .72rem 1rem;
  border-radius: 8px;
  font-size: .88rem;
  display: none;
}
.form-feedback.success {
  display:block;
  background: rgba(16,185,129,.1);
  border: 1px solid rgba(16,185,129,.4);
  color: var(--success);
}
.form-feedback.error {
  display:block;
  background: rgba(239,68,68,.1);
  border: 1px solid rgba(239,68,68,.35);
  color: var(--error);
}


/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: var(--bg-card);
  border-top: 1px solid var(--border);
  padding: 3rem 1.5rem 2rem;
}
.footer-inner { max-width:1200px; margin:0 auto; }
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr;
  gap: 3rem;
  margin-bottom: 2.5rem;
}
.footer-brand p { font-size:.87rem; color:var(--text-muted); line-height:1.65; margin-top:.9rem; max-width:280px; }
.footer-nav h4 { font-size:.78rem; font-weight:700; text-transform:uppercase; letter-spacing:.09em; color:var(--text-muted); margin-bottom:1rem; }
.footer-nav ul { display:flex; flex-direction:column; gap:.5rem; }
.footer-nav ul a { font-size:.87rem; color:var(--text-muted); transition:color .2s; }
.footer-nav ul a:hover { color:var(--cyan); }

.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.footer-bottom p   { font-size:.78rem; color:var(--text-muted); }
.footer-bottom a   { color:var(--cyan); }
.footer-bottom a:hover { opacity:.8; }


/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .normativa-inner  { grid-template-columns: 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }

  .problema-grid  { grid-template-columns: 1fr; }
  .beneficios-grid { grid-template-columns: 1fr; }
  .contacto-inner { grid-template-columns: 1fr; gap: 2.5rem; }
  .form-row       { grid-template-columns: 1fr; }
  .footer-top     { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom  { flex-direction: column; text-align: center; }

  .resp-metrics   { gap: 2rem; }
  .concentric-wrap { width:260px; height:260px; }
  .c-ring:nth-child(1) { width:260px;height:260px; }
  .c-ring:nth-child(2) { width:204px;height:204px; }
  .c-ring:nth-child(3) { width:152px;height:152px; }
  .c-ring:nth-child(4) { width:104px;height:104px; }
}

@media (max-width: 480px) {
  .hero-actions    { flex-direction: column; }
  .hero-actions .btn { justify-content: center; }
}