/* ═══════════════════════════════════════
   WATTDELL — Industrial Premium Web
   SpaceX-inspired dark design
   ═══════════════════════════════════════ */

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

:root {
  --black:    #000000;
  --black2:   #0a0a0a;
  --black3:   #111111;
  --black4:   #1a1a1a;
  --white:    #ffffff;
  --gray1:    #e0e0e0;
  --gray2:    #999999;
  --gray3:    #555555;
  --blue:     #1e90ff;
  --blue-dim: rgba(30, 144, 255, 0.15);
  --orange:   #ff6600;
  --orange-dim: rgba(255, 102, 0, 0.15);
  --border:   rgba(255, 255, 255, 0.1);
  --font-display: 'Barlow Condensed', sans-serif;
  --font-body:    'Barlow', sans-serif;
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --ease-out: cubic-bezier(0.0, 0.0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  font-weight: 300;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ═══ SCROLLBAR ═══ */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--black); }
::-webkit-scrollbar-thumb { background: var(--gray3); }
::-webkit-scrollbar-thumb:hover { background: var(--blue); }

/* ═══ SELECTION ═══ */
::selection { background: var(--blue); color: var(--white); }

/* ═══════════════ NAVIGATION ═══════════════ */
#nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 3rem;
  height: 64px;
  transition: background 0.4s var(--ease), backdrop-filter 0.4s var(--ease);
}

#nav.scrolled {
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  color: var(--white);
  text-decoration: none;
  transition: color 0.3s;
}

.nav-logo:hover { color: var(--blue); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: rgba(255,255,255,0.75);
  text-decoration: none;
  transition: color 0.3s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--blue);
  transition: width 0.3s var(--ease);
}

.nav-links a:hover { color: var(--white); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  background: transparent;
  border: 1px solid rgba(255,255,255,0.4) !important;
  padding: 0.5rem 1.2rem;
  border-radius: 2px;
  color: var(--white) !important;
  transition: border-color 0.3s, background 0.3s !important;
}

.nav-cta:hover {
  border-color: var(--white) !important;
  background: rgba(255,255,255,0.08) !important;
}

.nav-cta::after { display: none !important; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--white);
  transition: transform 0.3s, opacity 0.3s;
}

/* ═══════════════ HERO ═══════════════ */
#hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--black);
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(0,0,0,0.1) 0%,
    rgba(0,0,0,0.3) 60%,
    rgba(0,0,0,0.85) 100%
  );
}

.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 2rem;
  max-width: 900px;
}

.hero-eyebrow {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: rgba(255,255,255,0.5);
  margin-bottom: 1.5rem;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 9rem);
  font-weight: 800;
  line-height: 0.95;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-bottom: 2rem;
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.2rem);
  font-weight: 300;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
  margin-bottom: 3rem;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--black);
  background: var(--white);
  padding: 0.9rem 2.5rem;
  text-decoration: none;
  border-radius: 2px;
  transition: background 0.3s, color 0.3s, transform 0.2s;
}

.btn-primary:hover {
  background: var(--blue);
  color: var(--white);
  transform: translateY(-2px);
}

.btn-ghost {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.15em;
  color: var(--white);
  background: transparent;
  padding: 0.9rem 2.5rem;
  text-decoration: none;
  border: 1px solid rgba(255,255,255,0.4);
  border-radius: 2px;
  transition: border-color 0.3s, background 0.3s, transform 0.2s;
}

.btn-ghost:hover {
  border-color: var(--white);
  background: rgba(255,255,255,0.08);
  transform: translateY(-2px);
}

.hero-scroll {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.hero-scroll span {
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: rgba(255,255,255,0.4);
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, rgba(255,255,255,0.5), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(1); }
  50%       { opacity: 0.9; transform: scaleY(1.1); }
}

/* ═══════════════ STATS ═══════════════ */
#stats {
  background: var(--black3);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 3rem 3rem;
}

.stats-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: 2rem;
  flex-wrap: wrap;
}

.stat {
  text-align: center;
  flex: 1;
  min-width: 160px;
}

.stat-row {
  display: flex;
  align-items: baseline;
  justify-content: center;
  gap: 2px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: clamp(3rem, 5vw, 4.5rem);
  font-weight: 800;
  color: var(--white);
  line-height: 1;
}

.stat-unit {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--blue);
}

.stat-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--gray2);
  margin-top: 0.5rem;
  text-transform: uppercase;
}

.stat-divider {
  width: 1px;
  height: 60px;
  background: var(--border);
}

/* ═══════════════ SERVICE SECTIONS ═══════════════ */
.service-section {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  overflow: hidden;
}

.service-section.dark { background: var(--black); }
.service-section.light-dark { background: var(--black2); }

.service-section.flip .service-content { order: 2; }
.service-section.flip .service-visual  { order: 1; }

.service-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.service-content {
  padding: 6rem 5rem;
  max-width: 600px;
}

.service-label {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--blue);
  margin-bottom: 1.2rem;
  text-transform: uppercase;
}

.service-section h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4.5rem);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.01em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.service-section p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.65);
  line-height: 1.75;
  margin-bottom: 2rem;
  max-width: 480px;
}

.feature-list {
  list-style: none;
  margin-bottom: 2.5rem;
}

.feature-list li {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.55);
  padding: 0.6rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.07);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.feature-list li::before {
  content: '';
  width: 20px;
  height: 1px;
  background: var(--blue);
  flex-shrink: 0;
}

.btn-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--white);
  text-decoration: none;
  padding: 0.75rem 0;
  border-bottom: 1px solid rgba(255,255,255,0.3);
  transition: border-color 0.3s, color 0.3s;
}

.btn-arrow span {
  transition: transform 0.3s var(--ease);
}

.btn-arrow:hover {
  color: var(--blue);
  border-color: var(--blue);
}

.btn-arrow:hover span {
  transform: translateX(6px);
}

/* Service Visuals */
.service-visual {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100%;
  min-height: 400px;
  padding: 4rem;
  position: relative;
}

/* Gear animation */
.gear-wrap {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gear {
  position: absolute;
}

.g1 {
  width: 280px;
  height: 280px;
  animation: rotateGear 12s linear infinite;
}

.g2 {
  width: 180px;
  height: 180px;
  top: 20%;
  right: 10%;
  animation: rotateGear 8s linear infinite reverse;
}

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

/* CNC animation */
.cnc-anim {
  width: 100%;
  max-width: 420px;
}

.cnc-svg { width: 100%; height: auto; }

.cnc-cursor {
  animation: cncMove 4s ease-in-out infinite;
}

@keyframes cncMove {
  0%   { transform: translate(0,0); }
  25%  { transform: translate(80px, -50px); }
  50%  { transform: translate(80px, 70px); }
  75%  { transform: translate(-60px, 70px); }
  100% { transform: translate(0,0); }
}

.tool-path {
  animation: drawPath 4s ease-in-out infinite;
}

@keyframes drawPath {
  0%   { stroke-dashoffset: 300; opacity: 0; }
  10%  { opacity: 1; }
  80%  { stroke-dashoffset: 0; }
  100% { stroke-dashoffset: 0; opacity: 0; }
}

/* PLC canvas */
.plc-anim { width: 100%; max-width: 420px; }
#plc-canvas { width: 100%; height: auto; }

/* Robot arm */
.robot-visual { position: relative; }

.robot-arm {
  width: 100%;
  max-width: 320px;
}

.arm-svg { width: 100%; height: auto; }

.arm-seg1 {
  transform-origin: 150px 320px;
  animation: armSeg1 6s ease-in-out infinite;
}
.arm-seg2 {
  transform-origin: 150px 200px;
  animation: armSeg2 6s ease-in-out infinite;
}
.arm-seg3 {
  transform-origin: 150px 100px;
  animation: armSeg3 6s ease-in-out infinite;
}

@keyframes armSeg1 {
  0%, 100% { transform: rotate(-5deg); }
  30%       { transform: rotate(15deg); }
  60%       { transform: rotate(-10deg); }
}
@keyframes armSeg2 {
  0%, 100% { transform: rotate(10deg); }
  30%       { transform: rotate(-20deg); }
  60%       { transform: rotate(15deg); }
}
@keyframes armSeg3 {
  0%, 100% { transform: rotate(-8deg); }
  30%       { transform: rotate(20deg); }
  60%       { transform: rotate(-12deg); }
}

/* Engineering diagram */
.diagram-anim {
  width: 100%;
  max-width: 420px;
}

.diagram-svg { width: 100%; height: auto; }

.flow-node {
  animation: flowPulse 3s ease-in-out infinite;
}

.flow-node:nth-child(1)  { animation-delay: 0s; }
.flow-node:nth-child(3)  { animation-delay: 0.5s; }
.flow-node:nth-child(5)  { animation-delay: 1s; }
.flow-node:nth-child(7)  { animation-delay: 1.5s; }
.flow-node:nth-child(9)  { animation-delay: 2s; }

@keyframes flowPulse {
  0%, 100% { opacity: 0.6; }
  50%       { opacity: 1; }
}

/* ═══════════════ PROJECTS GRID ═══════════════ */
#proyectos {
  background: var(--black);
  padding: 6rem 3rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.3em;
  color: var(--blue);
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: block;
}

.section-header h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}

.section-header p {
  color: rgba(255,255,255,0.55);
  font-size: 1rem;
}

.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2px;
  max-width: 1400px;
  margin: 0 auto;
}

.project-card {
  position: relative;
  aspect-ratio: 1 / 1;
  overflow: hidden;
  cursor: pointer;
}

.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  border: 1px solid transparent;
  transition: border-color 0.4s;
  z-index: 2;
}

.project-card:hover::after {
  border-color: var(--blue);
}

.card-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  transition: transform 0.8s var(--ease), filter 0.4s;
  filter: brightness(0.5) saturate(0.3);
}

.project-card:hover .card-bg {
  transform: scale(1.05);
  filter: brightness(0.7) saturate(0.5);
}

/* Card background patterns */
.bg-auto {
  background:
    repeating-linear-gradient(0deg, transparent, transparent 30px, rgba(30,144,255,0.05) 30px, rgba(30,144,255,0.05) 31px),
    repeating-linear-gradient(90deg, transparent, transparent 30px, rgba(30,144,255,0.05) 30px, rgba(30,144,255,0.05) 31px),
    radial-gradient(ellipse at 30% 50%, rgba(30,144,255,0.3) 0%, transparent 70%),
    var(--black3);
}

.bg-cnc {
  background:
    repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255,102,0,0.05) 20px, rgba(255,102,0,0.05) 21px),
    radial-gradient(ellipse at 70% 30%, rgba(255,102,0,0.25) 0%, transparent 60%),
    var(--black3);
}

.bg-plc {
  background:
    repeating-linear-gradient(0deg, rgba(30,144,255,0.04) 0px, rgba(30,144,255,0.04) 1px, transparent 1px, transparent 20px),
    repeating-linear-gradient(90deg, rgba(30,144,255,0.04) 0px, rgba(30,144,255,0.04) 1px, transparent 1px, transparent 20px),
    radial-gradient(ellipse at 50% 70%, rgba(30,144,255,0.25) 0%, transparent 65%),
    var(--black3);
}

.bg-robot {
  background:
    radial-gradient(ellipse at 50% 50%, rgba(30,144,255,0.2) 0%, transparent 65%),
    repeating-linear-gradient(135deg, transparent, transparent 25px, rgba(30,144,255,0.04) 25px, rgba(30,144,255,0.04) 26px),
    var(--black3);
}

.bg-vision {
  background:
    radial-gradient(circle at 50% 50%, rgba(255,255,255,0.08) 0%, transparent 40%),
    radial-gradient(circle at 50% 50%, rgba(30,144,255,0.15) 0%, transparent 65%),
    var(--black3);
}

.bg-maint {
  background:
    repeating-linear-gradient(60deg, transparent, transparent 20px, rgba(255,102,0,0.04) 20px, rgba(255,102,0,0.04) 21px),
    radial-gradient(ellipse at 40% 60%, rgba(255,102,0,0.2) 0%, transparent 60%),
    var(--black3);
}

.card-content {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 2rem;
  background: linear-gradient(to top, rgba(0,0,0,0.95) 0%, transparent 100%);
  z-index: 1;
  transform: translateY(4px);
  transition: transform 0.4s var(--ease);
}

.project-card:hover .card-content { transform: translateY(0); }

.card-tag {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--blue);
  display: block;
  margin-bottom: 0.5rem;
}

.card-content h3 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.4rem;
}

.card-content p {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  line-height: 1.5;
}

/* ═══════════════ POR QUÉ WATTDELL ═══════════════ */
#porque {
  background: var(--black2);
  padding: 7rem 5rem;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.porque-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 5rem;
}

.porque-text .section-tag { display: block; margin-bottom: 1rem; }

.porque-text h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.porque-text > p {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 2.5rem;
}

.pilares {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.pilar {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  transition: border-color 0.3s, background 0.3s;
}

.pilar:hover {
  border-color: rgba(30,144,255,0.4);
  background: rgba(30,144,255,0.04);
}

.pilar-icon {
  font-size: 1.5rem;
  flex-shrink: 0;
  padding-top: 2px;
}

.pilar strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  margin-bottom: 0.2rem;
}

.pilar span {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
}

.porque-visual {
  display: flex;
  align-items: center;
  justify-content: center;
}

#porque-canvas {
  width: 100%;
  max-width: 500px;
  height: auto;
}

/* ═══════════════ CONTACTO ═══════════════ */
#contacto {
  background: var(--black);
  padding: 7rem 5rem;
}

.contact-inner {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 6rem;
  align-items: start;
}

.contact-info .section-tag { display: block; margin-bottom: 1rem; }

.contact-info h2 {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 4vw, 4rem);
  font-weight: 800;
  line-height: 1;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.contact-info > p {
  font-size: 1rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.8;
  margin-bottom: 3rem;
}

.contact-details { display: flex; flex-direction: column; gap: 1.5rem; }

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}

.contact-icon {
  font-size: 1.2rem;
  color: var(--blue);
  flex-shrink: 0;
  width: 28px;
  text-align: center;
  margin-top: 2px;
}

.contact-label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--gray2);
  text-transform: uppercase;
  margin-bottom: 0.3rem;
}

.contact-item a, .contact-item span:last-child {
  font-size: 0.95rem;
  color: rgba(255,255,255,0.8);
  text-decoration: none;
  transition: color 0.3s;
}

.contact-item a:hover { color: var(--blue); }

/* Contact Form */
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form-group label {
  font-family: var(--font-display);
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gray2);
}

.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.04);
  border: 1px solid var(--border);
  color: var(--white);
  font-family: var(--font-body);
  font-size: 0.95rem;
  font-weight: 300;
  padding: 0.85rem 1rem;
  border-radius: 2px;
  outline: none;
  transition: border-color 0.3s, background 0.3s;
  appearance: none;
}

.form-group select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23999' stroke-width='1.5' fill='none'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  padding-right: 2.5rem;
  cursor: pointer;
}

.form-group select option { background: #111; color: #fff; }

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: rgba(30,144,255,0.04);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,0.25);
}

.form-group textarea { resize: vertical; min-height: 120px; }

.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--black);
  background: var(--white);
  border: none;
  padding: 1rem 2.5rem;
  border-radius: 2px;
  cursor: pointer;
  transition: background 0.3s, color 0.3s, transform 0.2s;
  align-self: flex-start;
}

.btn-submit span { transition: transform 0.3s; }
.btn-submit:hover { background: var(--blue); color: var(--white); transform: translateY(-2px); }
.btn-submit:hover span { transform: translateX(4px); }

.form-note {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
  margin-top: -0.5rem;
}

/* Form success state */
.form-success {
  background: rgba(30,144,255,0.08);
  border: 1px solid rgba(30,144,255,0.3);
  border-radius: 4px;
  padding: 1.5rem;
  text-align: center;
  color: rgba(255,255,255,0.8);
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.05em;
}

/* ═══════════════ FOOTER ═══════════════ */
#footer {
  background: var(--black2);
  border-top: 1px solid var(--border);
  padding: 4rem 5rem 2rem;
}

.footer-top {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4rem;
  margin-bottom: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid var(--border);
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 800;
  letter-spacing: 0.15em;
  margin-bottom: 1rem;
}

.footer-brand p {
  font-size: 0.9rem;
  color: rgba(255,255,255,0.4);
  line-height: 1.7;
}

.footer-links {
  display: flex;
  gap: 4rem;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-col h4 {
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  color: var(--gray2);
  margin-bottom: 0.5rem;
}

.footer-col a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  text-decoration: none;
  transition: color 0.3s;
}

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

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  font-family: var(--font-display);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: rgba(255,255,255,0.25);
}

/* ═══════════════ SCROLL ANIMATIONS ═══════════════ */
.reveal-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s var(--ease-out), transform 0.9s var(--ease-out);
}

.reveal-up.visible {
  opacity: 1;
  transform: translateY(0);
}

.delay-1 { transition-delay: 0.12s; }
.delay-2 { transition-delay: 0.24s; }
.delay-3 { transition-delay: 0.36s; }
.delay-4 { transition-delay: 0.48s; }

/* ═══════════════ CIRCUIT ANIMATION HELPER ═══════════════ */
.circuit-anim {
  width: 100%;
  height: 100%;
  position: absolute;
  inset: 0;
}

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 1024px) {
  .service-section {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 4rem 0;
  }

  .service-section.flip .service-content { order: 1; }
  .service-section.flip .service-visual  { order: 2; }

  .service-content { padding: 3rem 2.5rem; max-width: 100%; }

  .service-visual {
    height: 300px;
    min-height: unset;
    padding: 2rem;
  }

  .porque-inner,
  .contact-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

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

  #porque { padding: 5rem 2.5rem; }
  #contacto { padding: 5rem 2.5rem; }

  .footer-top { grid-template-columns: 1fr; }
  #footer { padding: 3rem 2.5rem 2rem; }
}

@media (max-width: 768px) {
  #nav { padding: 0 1.5rem; }

  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    top: 64px;
    background: rgba(0,0,0,0.97);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    backdrop-filter: blur(20px);
  }

  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.2rem; letter-spacing: 0.2em; }

  .hamburger { display: flex; }
  .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); }

  .stat-divider { display: none; }
  .stats-inner { gap: 1.5rem; }

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

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

  .footer-links { flex-direction: column; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }

  #stats { padding: 2.5rem 1.5rem; }
}

@media (max-width: 480px) {
  .projects-grid { grid-template-columns: 1fr; }
  .hero-title { font-size: clamp(3rem, 14vw, 4.5rem); }
  .service-content { padding: 3rem 1.5rem; }
  #proyectos { padding: 4rem 1.5rem; }
}