:root {
  --bg: #ffffff;
  --bg-subtle: #f4f4f5;
  --text-main: #111827;
  --text-muted: #6b7280;
  --text-soft: #9ca3af;
  --border-subtle: #e5e7eb;
  --accent: #111827;
  --accent-soft: rgba(17,24,39,0.06);
  --shadow-soft: 0 18px 70px rgba(15,23,42,0.12);
  --transition-fast: 160ms ease-out;
  --transition-med: 280ms ease-out;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  height: 100%;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--bg);
  color: var(--text-main);
  overflow-x: hidden;
  scroll-behavior: smooth;
}

/* Scroll progress bar */

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 100%;
  background: linear-gradient(90deg,#111827,#4b5563);
  transform-origin: left center;
  transform: scaleX(0);
  z-index: 40;
}

/* Header */

header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 30;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 5vw;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(229,231,235,0.9);
  transition: box-shadow var(--transition-med), border-color var(--transition-med),
              padding var(--transition-med), background var(--transition-med);
}

header.is-scrolled {
  box-shadow: 0 10px 40px rgba(15,23,42,0.12);
  border-color: rgba(209,213,219,1);
  padding-top: 8px;
  padding-bottom: 8px;
  background: #ffffff;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
}

.logo svg { width: 32px; height: 32px; }
.logo span { font-weight: 700; white-space: nowrap; }

.nav {
  display: flex;
  align-items: center;
  gap: 18px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
}

.nav-link {
  background: none;
  border: none;
  padding: 4px 0;
  cursor: pointer;
  color: var(--text-soft);
  position: relative;
  transition: color var(--transition-fast);
}

.nav-link::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width var(--transition-med);
}

.nav-link:hover { color: var(--text-main); }
.nav-link:hover::after { width: 100%; }
.nav-link.is-active { color: var(--text-main); }
.nav-link.is-active::after { width: 100%; }

main { padding-top: 84px; }

.view { padding: 0; }

body.js-ready .view {
  display: none;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 260ms ease-out, transform 260ms ease-out;
}

body.js-ready .view.view--active {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

/* Hero */

.hero {
  padding: 72px 5vw 72px;
  border-bottom: 1px solid var(--border-subtle);
  background: linear-gradient(to bottom,#ffffff,#f9fafb);
  min-height: calc(100vh - 84px);
  display: flex;
  align-items: center;
}

.hero-inner {
  max-width: 1120px;
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: minmax(0,1.05fr) minmax(0,1.15fr);
  gap: 40px;
  align-items: center;
}

.hero-copy {
  max-width: 560px;
}

.hero h1 {
  margin: 0 0 12px 0;
  font-size: clamp(2.6rem,4.5vw,3.6rem);
  line-height: 1.03;
  letter-spacing: 0.02em;
  font-weight: 800;
}

.hero-sub {
  margin: 0 0 26px 0;
  font-size: 0.98rem;
  color: var(--text-muted);
  max-width: 340px;
}

.hero-cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}

/* Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  border-radius: 999px;
  border: 1px solid #111827;
  background: #ffffff;
  color: var(--text-main);
  cursor: pointer;
  transition: background var(--transition-fast), color var(--transition-fast),
              box-shadow var(--transition-fast), transform var(--transition-fast),
              border-color var(--transition-fast);
}

.btn-primary {
  background: #111827;
  color: #f9fafb;
  box-shadow: 0 14px 40px rgba(15,23,42,0.25);
}

.btn-primary:hover {
  background: #000;
  box-shadow: 0 18px 60px rgba(15,23,42,0.35);
  transform: translateY(-1px);
}

.btn-ghost {
  border-color: var(--border-subtle);
}

.btn-ghost:hover {
  border-color:#111827;
  box-shadow:0 8px 30px rgba(15,23,42,0.15);
  transform: translateY(-1px);
}

.btn-icon {
  font-size: 0.85rem;
  transform: translateY(0.5px);
}

/* SCADA panel */

.hero-dashboard { width: 100%; }

.scada-panel {
  width: 100%;
  border-radius: 18px;
  border: 1px solid var(--border-subtle);
  background: radial-gradient(circle at top, #f9fafb 0, #f3f4f6 45%, #e5e7eb 100%);
  box-shadow: var(--shadow-soft);
  padding: 14px 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transform-origin: center;
  transform-style: preserve-3d;
  will-change: transform;
  transition: transform 180ms ease-out, box-shadow 180ms ease-out;
}

.scada-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 12px;
}

.scada-header-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-soft);
}

.scada-header-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
}

.scada-header-load {
  font-size: 1.05rem;
  font-weight: 600;
}

.scada-header-load .unit {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-left: 3px;
}

.scada-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 8px;
}

.scada-row-mid {
  grid-template-columns: repeat(2, minmax(0,1fr));
}

.scada-row-bottom {
  grid-template-columns: minmax(0,1fr);
}

.scada-tile {
  background: rgba(255,255,255,0.96);
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  padding: 6px 8px 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

/* Métricas */

.scada-tile-metric {
  padding-top: 8px;
  padding-bottom: 8px;
}

.metric-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-soft);
}

.metric-value {
  font-size: 1.05rem;
  font-weight: 600;
}

.metric-unit {
  font-size: 0.7rem;
  color: var(--text-muted);
}

/* Charts */

.tile-title {
  font-size: 0.68rem;
  text-transform: uppercase;
  letter-spacing: 0.12em;
  color: var(--text-soft);
}

.tile-chart {
  flex: 1;
  min-height: 80px;
}

.tile-chart-trend {
  min-height: 70px;
}

.scada-panel canvas {
  width: 100% !important;
  height: 100% !important;
  display: block;
}

/* Pie panel */

.scada-footer {
  display: flex;
  justify-content: space-between;
  gap: 8px;
  font-size: 0.72rem;
  color: var(--text-soft);
}

/* Platforms / domains */

.platforms {
  padding: 40px 5vw 64px;
  background: #ffffff;
}

.platforms-inner {
  max-width: 1120px;
  margin: 0 auto;
  border-top: 1px solid var(--border-subtle);
  padding-top: 28px;
}

.platforms-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.platforms-label {
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-soft);
}

.platforms-search {
  max-width: 260px;
  width: 100%;
  padding: 8px 10px;
  border-radius: 999px;
  border: 1px solid var(--border-subtle);
  font-size: 0.85rem;
  background: #f9fafb;
}

.platforms-list {
  border-top: 1px solid var(--border-subtle);
}

.platform-row {
  display: grid;
  grid-template-columns: minmax(0,1.4fr) minmax(0,2fr) auto;
  align-items: center;
  gap: 20px;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
  cursor: pointer;
  position: relative;
  overflow: hidden;
  background: #ffffff;
}

.platform-row::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to right,var(--accent-soft),transparent);
  opacity: 0;
  transition: opacity var(--transition-med), transform var(--transition-med);
  transform: translateX(-10%);
}

.platform-name {
  font-size: 1.3rem;
  font-weight: 500;
}

.platform-desc {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.platform-index {
  font-size: 0.78rem;
  color: var(--text-soft);
  text-transform: uppercase;
  letter-spacing: 0.14em;
}

.platform-arrow {
  position: absolute;
  right: 0.5rem;
  font-size: 0.9rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity var(--transition-med), transform var(--transition-med);
}

.platform-row:hover::before {
  opacity: 1;
  transform: translateX(0);
}

.platform-row:hover .platform-name {
  transform: translateX(4px);
}

.platform-row:hover .platform-arrow {
  opacity: 1;
  transform: translateX(0);
}

.platform-detail {
  margin-top: 24px;
  padding: 18px 18px 16px;
  border-radius: 12px;
  border: 1px solid var(--border-subtle);
  background: #f9fafb;
}

.platform-detail-title {
  margin: 0 0 6px 0;
  font-size: 1.1rem;
}

.platform-detail-text {
  margin: 0 0 10px 0;
  font-size: 0.95rem;
  color: var(--text-muted);
}

.platform-detail-points {
  margin: 0;
  padding-left: 18px;
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* Contact */

#contact {
  padding: 64px 5vw 56px;
  background: #f9fafb;
  border-top: 1px solid var(--border-subtle);
}

.contact-inner {
  max-width: 1120px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(0,1.1fr) minmax(0,1fr);
  gap: 40px;
  align-items: flex-start;
}

#contact h3 {
  margin: 0 0 8px 0;
  font-size: 1.6rem;
}

.contact-subtitle {
  margin: 0 0 14px 0;
  font-size: 0.98rem;
  color: var(--text-muted);
}

.contact-meta {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-soft);
  margin-bottom: 10px;
}

.contact-panel {
  border-radius: 16px;
  border: 1px solid var(--border-subtle);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
  padding: 20px 20px 22px;
}

form {
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-soft);
  margin-bottom: 4px;
  display: block;
}

input,
textarea {
  width: 100%;
  padding: 10px 11px;
  border-radius: 10px;
  border: 1px solid var(--border-subtle);
  font-size: 0.95rem;
  background: #f9fafb;
  color: var(--text-main);
  resize: none;
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast),
              background var(--transition-fast), transform var(--transition-fast);
}

input::placeholder,
textarea::placeholder { color: #9ca3af; }

input:focus,
textarea:focus {
  border-color: #111827;
  box-shadow: 0 0 0 1px rgba(15,23,42,0.35);
  background: #ffffff;
  transform: translateY(-1px);
}

textarea { min-height: 120px; }

button[type="submit"] { margin-top: 4px; }

.contact-note {
  font-size: 0.78rem;
  color: var(--text-soft);
  margin-top: 10px;
}

/* Footer */

footer {
  text-align: center;
  font-size: 0.84rem;
  color: var(--text-soft);
  padding: 18px 16px 24px;
  border-top: 1px solid var(--border-subtle);
  background: #ffffff;
}

/* Reveal anim */

.reveal {
  opacity: 0;
  transform: translateY(24px);
}

.reveal.reveal--visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 320ms ease-out, transform 320ms ease-out;
}

/* Responsive */

@media (max-width: 960px) {
  .hero {
    padding: 64px 16px 56px;
    min-height: auto;
  }

  .hero-inner {
    grid-template-columns: minmax(0,1fr);
    gap: 24px;
  }

  .hero-dashboard {
    order: 2;
  }

  .contact-inner {
    grid-template-columns: minmax(0,1fr);
  }
}

@media (max-width: 768px) {
  header { padding: 10px 16px; }
  .nav { display: none; }
  .platforms { padding: 32px 16px 52px; }
  #contact { padding: 52px 16px 44px; }
}

@media (max-width: 600px) {
  .scada-row { grid-template-columns: minmax(0,1fr); }
  .scada-panel { padding: 12px 12px 10px; }
}