/* ================================
   CSS Custom Properties
   ================================ */
:root {
  /* Colors - Dark + Cobalt + Gold */
  --bg-deep: #080c16;
  --bg-surface: #0f1525;
  --bg-card: #161d30;
  --bg-card-hover: #1c2540;
  --cobalt: #2563eb;
  --cobalt-light: #3b82f6;
  --cobalt-glow: rgba(37, 99, 235, 0.25);
  --gold: #f59e0b;
  --gold-light: #fbbf24;
  --gold-glow: rgba(245, 158, 11, 0.2);
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;

  /* Typography */
  --font-heading: 'Space Grotesk', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.5rem;
  --font-size-2xl: 2rem;
  --font-size-3xl: 2.75rem;
  --font-size-4xl: 3.5rem;
  --line-height-tight: 1.15;
  --line-height-normal: 1.6;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 5rem;

  /* Layout */
  --max-width: 1200px;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-spring: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  font-family: var(--font-body);
  font-size: var(--font-size-base);
  line-height: var(--line-height-normal);
  color: var(--text-primary);
  background-color: var(--bg-deep);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

/* ================================
   Language Toggle (show/hide)
   ================================ */
:not(html)[lang="es"] {
  display: none;
}

html.es [lang="en"] {
  display: none;
}

html.es [lang="es"] {
  display: inline;
}

html.es p [lang="es"],
html.es li [lang="es"],
html.es h1 [lang="es"],
html.es h2 [lang="es"],
html.es h3 [lang="es"] {
  display: inline;
}

/* ================================
   Typography
   ================================ */
h1, h2, h3 {
  font-family: var(--font-heading);
  line-height: var(--line-height-tight);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.02em;
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-xs);
}

p {
  color: var(--text-secondary);
}

a {
  color: var(--cobalt-light);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--gold);
}

ul {
  list-style: none;
}

/* Gradient text */
.text-gradient {
  background: linear-gradient(135deg, var(--cobalt-light) 0%, var(--gold) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ================================
   Scroll Reveal Animations
   ================================ */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

[data-reveal].revealed {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger children in grids */
.services-grid [data-reveal]:nth-child(2) { transition-delay: 0.1s; }
.services-grid [data-reveal]:nth-child(3) { transition-delay: 0.2s; }
.work-grid [data-reveal]:nth-child(2) { transition-delay: 0.15s; }
.work-grid [data-reveal]:nth-child(3) { transition-delay: 0.3s; }
.process-steps [data-reveal]:nth-child(2) { transition-delay: 0.12s; }
.process-steps [data-reveal]:nth-child(3) { transition-delay: 0.24s; }

/* ================================
   Layout Utilities
   ================================ */
section {
  padding: var(--space-xl) var(--space-md);
}

section > h2,
section > p,
section > .services-grid,
section > .work-grid,
section > .process-steps,
section > .contact-form,
section > .form-success,
section > .contact-intro {
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* ================================
   Buttons
   ================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 1.75rem;
  font-family: var(--font-heading);
  font-size: var(--font-size-base);
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

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

.btn-primary:hover {
  background-color: var(--cobalt-light);
  border-color: var(--cobalt-light);
  box-shadow: 0 0 24px var(--cobalt-glow), 0 4px 16px rgba(0, 0, 0, 0.3);
  color: var(--text-primary);
  transform: translateY(-2px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: transparent;
  color: var(--text-primary);
  border-color: rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
  border-color: var(--gold);
  color: var(--gold);
  box-shadow: 0 0 20px var(--gold-glow);
  transform: translateY(-2px);
}

.btn-secondary:active {
  transform: translateY(0);
}

/* ================================
   Header
   ================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background-color: rgba(8, 12, 22, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  text-decoration: none;
  z-index: 101;
}

.logo-mark {
  flex-shrink: 0;
  filter: drop-shadow(0 0 8px rgba(37, 99, 235, 0.6)) drop-shadow(0 0 20px rgba(37, 99, 235, 0.3));
  transition: filter var(--transition-base);
}

.logo:hover .logo-mark {
  filter: drop-shadow(0 0 12px rgba(37, 99, 235, 0.8)) drop-shadow(0 0 28px rgba(245, 158, 11, 0.4));
}

.logo-text {
  font-family: var(--font-heading);
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.logo-accent {
  color: var(--gold);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  z-index: 101;
}

.nav {
  display: none;
  gap: var(--space-lg);
}

.nav a {
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9375rem;
  transition: color var(--transition-fast);
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gold);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.nav a:hover {
  color: var(--text-primary);
}

.nav a:hover::after {
  width: 100%;
}

.lang-toggle {
  padding: 0.375rem 0.75rem;
  font-family: var(--font-heading);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  background-color: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition-fast);
  letter-spacing: 0.05em;
}

.lang-toggle:hover {
  color: var(--text-primary);
  border-color: var(--cobalt);
  background-color: rgba(37, 99, 235, 0.1);
}

/* ================================
   Mobile Menu Toggle
   ================================ */
.menu-toggle {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 0;
  background: none;
  border: none;
  cursor: pointer;
  -webkit-tap-highlight-color: transparent;
}

.menu-bar {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--text-primary);
  border-radius: 1px;
  transition: all var(--transition-base);
  transform-origin: center;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav overlay */
.nav.is-open {
  display: flex;
  flex-direction: column;
  position: fixed;
  inset: 0;
  z-index: 99;
  background-color: rgba(8, 12, 22, 0.97);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  align-items: center;
  justify-content: center;
  gap: var(--space-xl);
  padding: var(--space-2xl);
}

.nav.is-open a {
  font-size: var(--font-size-2xl);
  color: var(--text-primary);
  font-weight: 600;
}

.nav.is-open a:hover {
  color: var(--gold);
}

/* ================================
   Hero
   ================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: calc(var(--space-2xl) + 60px);
  padding-bottom: var(--space-2xl);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 50% at 50% 0%, rgba(37, 99, 235, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 40% at 70% 80%, rgba(245, 158, 11, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  text-align: center;
  max-width: 800px;
  padding: 0 var(--space-md);
}

.hero-badge {
  margin-bottom: var(--space-md);
}

.hero-badge img {
  animation: float 6s ease-in-out infinite;
  filter: drop-shadow(0 0 12px rgba(37, 99, 235, 0.6)) drop-shadow(0 0 30px rgba(37, 99, 235, 0.3));
}

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

.hero h1 {
  margin-bottom: var(--space-md);
}

.hero-sub {
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-lg);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-ctas {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  align-items: center;
}

/* ================================
   Services
   ================================ */
.services {
  background-color: var(--bg-surface);
  position: relative;
}

.services::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.3), transparent);
}

.services h2 {
  text-align: center;
}

.services-grid {
  display: grid;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

.service-card {
  background-color: var(--bg-card);
  padding: var(--space-lg);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--cobalt), var(--gold));
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  background-color: var(--bg-card-hover);
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3), 0 0 40px var(--cobalt-glow);
  transform: translateY(-4px);
}

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

.service-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.15), rgba(245, 158, 11, 0.1));
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  color: var(--cobalt-light);
  transition: all var(--transition-base);
}

.service-card:hover .service-icon {
  color: var(--gold);
  transform: scale(1.1) rotate(-3deg);
}

.service-card h3 {
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.service-card > p:first-of-type {
  margin-bottom: var(--space-sm);
}

.service-card ul {
  margin-bottom: var(--space-sm);
  padding-left: var(--space-sm);
}

.service-card li {
  position: relative;
  padding-left: var(--space-md);
  margin-bottom: var(--space-xs);
  color: var(--text-secondary);
}

.service-card li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 6px;
  height: 6px;
  background-color: var(--gold);
  border-radius: 50%;
}

.service-best {
  font-size: 0.875rem;
  color: var(--text-muted);
  font-style: italic;
}

/* ================================
   Work / Portfolio
   ================================ */
.work h2 {
  text-align: center;
}

.work-grid {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
}

.work-card {
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid rgba(255, 255, 255, 0.06);
  transition: all var(--transition-base);
  overflow: hidden;
}

.work-card:hover {
  border-color: rgba(245, 158, 11, 0.3);
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.work-image {
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background-color: var(--bg-surface);
}

.work-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.work-card:hover .work-image img {
  transform: scale(1.04);
}

.work-body {
  padding: var(--space-md) var(--space-lg) var(--space-lg);
}

.work-card h3 {
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-size: var(--font-size-xl);
}

.work-type {
  color: var(--cobalt-light);
  font-weight: 500;
  font-size: 0.875rem;
  margin-bottom: var(--space-sm);
}

.work-body > p:not(.work-type):not(.work-stack) {
  margin-bottom: var(--space-sm);
  font-size: 0.9375rem;
}

.work-stack {
  font-size: 0.8125rem;
  color: var(--text-muted);
  font-family: var(--font-heading);
  letter-spacing: 0.02em;
}

/* ================================
   Process
   ================================ */
.process {
  background-color: var(--bg-surface);
  position: relative;
}

.process::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(245, 158, 11, 0.3), transparent);
}

.process h2 {
  text-align: center;
}

.process-steps {
  display: grid;
  gap: var(--space-lg);
  margin-top: var(--space-lg);
  counter-reset: none;
  list-style: none;
}

.process-steps li {
  position: relative;
  padding-left: calc(var(--space-xl) + var(--space-sm));
}

.step-number {
  position: absolute;
  left: 0;
  top: 0;
  width: var(--space-xl);
  height: var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--cobalt), var(--cobalt-light));
  color: var(--text-primary);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: var(--font-size-lg);
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px var(--cobalt-glow);
}

.process-steps h3 {
  color: var(--text-primary);
  font-family: var(--font-heading);
}

.process-steps p {
  margin-top: var(--space-xs);
}

/* ================================
   About
   ================================ */
.about {
  text-align: center;
  position: relative;
}

.about-inner {
  max-width: 700px;
  margin: 0 auto;
}

.about-logo {
  margin-bottom: var(--space-md);
  filter: drop-shadow(0 0 12px rgba(37, 99, 235, 0.6)) drop-shadow(0 0 30px rgba(37, 99, 235, 0.3));
}

.about p {
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
  font-size: var(--font-size-lg);
}

/* ================================
   Contact
   ================================ */
.contact {
  background-color: var(--bg-surface);
  position: relative;
}

.contact::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(37, 99, 235, 0.3), transparent);
}

.contact h2 {
  text-align: center;
}

.contact-intro {
  text-align: center;
  max-width: 600px;
  margin-bottom: var(--space-lg);
}

.contact-form {
  display: grid;
  gap: var(--space-md);
  max-width: 600px;
}

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

.form-group label {
  font-family: var(--font-heading);
  font-weight: 500;
  font-size: 0.9375rem;
  color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 0.875rem var(--space-sm);
  font-size: var(--font-size-base);
  font-family: var(--font-body);
  color: var(--text-primary);
  background-color: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--cobalt);
  box-shadow: 0 0 0 3px var(--cobalt-glow);
}

.form-group select {
  cursor: pointer;
}

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

.contact-form .btn {
  margin-top: var(--space-sm);
}

.form-success {
  max-width: 600px;
  padding: var(--space-lg);
  background-color: var(--bg-card);
  border-radius: var(--radius-xl);
  border: 1px solid var(--gold);
  text-align: center;
  box-shadow: 0 0 30px var(--gold-glow);
}

.form-success p {
  color: var(--text-primary);
}

.form-success a {
  color: var(--gold);
  text-decoration: underline;
}

/* ================================
   Footer
   ================================ */
.footer {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  padding: var(--space-xl) var(--space-md);
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  width: 100%;
  max-width: var(--max-width);
}

.footer-nav {
  display: flex;
  gap: var(--space-md);
}

.footer-nav a {
  color: var(--text-secondary);
  font-family: var(--font-heading);
  font-size: 0.875rem;
}

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

.footer-copy {
  font-size: 0.8125rem;
  color: var(--text-muted);
}

/* ================================
   Tile Animation (Hero Background)
   ================================ */
.tile {
  position: absolute;
  opacity: 0.08;
  pointer-events: none;
}

.tile svg {
  width: 100%;
  height: 100%;
}

/* ================================
   Media Queries
   ================================ */

/* Tablet and up */
@media (min-width: 768px) {
  :root {
    --font-size-2xl: 2.5rem;
    --font-size-3xl: 3.25rem;
  }

  h1 {
    font-size: var(--font-size-3xl);
  }

  section {
    padding: var(--space-2xl) var(--space-lg);
  }

  .menu-toggle {
    display: none;
  }

  .nav {
    display: flex;
  }

  .hero-ctas {
    flex-direction: row;
    justify-content: center;
  }

  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .work-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-steps {
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
  }

  .process-steps li {
    padding-left: 0;
    padding-top: calc(var(--space-xl) + var(--space-md));
    text-align: center;
  }

  .step-number {
    left: 50%;
    transform: translateX(-50%);
  }

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
  }
}

/* Desktop */
@media (min-width: 1024px) {
  :root {
    --font-size-3xl: 3.75rem;
  }

  .header {
    padding: var(--space-sm) var(--space-lg);
  }
}

/* Touch-friendly on mobile */
@media (max-width: 767px) {
  .btn {
    padding: 1rem 1.75rem;
    min-height: 48px;
  }

  .hero-ctas {
    width: 100%;
  }

  .hero-ctas .btn {
    width: 100%;
  }

  .form-group input,
  .form-group select,
  .form-group textarea {
    padding: 1rem var(--space-sm);
    font-size: 1rem;
  }

  .work-body {
    padding: var(--space-md);
  }

  .nav a {
    min-height: 48px;
    display: flex;
    align-items: center;
  }
}