/*
 * ProjectMakers — Main Stylesheet
 * Design: Black / White / #5F3273 (purple accent)
 */

/* ============================================================
   CUSTOM PROPERTIES
   ============================================================ */
:root {
  --bg:                 #030303;
  --bg-alt:             #080808;
  --bg-card:            #0f0f0f;
  --border:             #1c1c1c;
  --text:               #f0f0f0;
  --text-muted:         #888;
  --text-subtle:        #444;
  --accent:             #5F3273;
  --accent-light:       #7a4291;
  --accent-glow:        rgba(95, 50, 115, 0.2);
  --accent-glow-strong: rgba(95, 50, 115, 0.45);

  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Barlow Semi Condensed', 'Inter', sans-serif;
  --font-mono:    'JetBrains Mono', 'Courier New', monospace;

  --section-py:    clamp(4.5rem, 9vw, 9rem);
  --container-px:  clamp(1.5rem, 5vw, 4rem);
  --max-w:         1280px;

  --radius-sm:  6px;
  --radius:     12px;
  --radius-lg:  20px;
  --radius-pill: 8px;

  --transition:      200ms ease;
  --transition-slow: 450ms ease;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font: inherit; }

/* ============================================================
   TYPOGRAPHY
   ============================================================ */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  line-height: 1.1;
  letter-spacing: -0.01em;
  color: var(--text);
}

h1 { font-size: clamp(2.6rem, 6vw, 4.5rem);  font-weight: 600; }
h2 { font-size: clamp(2rem,   4vw, 3.25rem); font-weight: 700; }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem);  font-weight: 600; }
h4 { font-size: 1.0625rem; font-weight: 600; }

p { color: var(--text-muted); line-height: 1.75; }

.accent-text { color: var(--accent); }

.gradient-text {
  background: linear-gradient(135deg, #fff 0%, var(--accent-light) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================================
   LAYOUT
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.section { padding: var(--section-py) 0; position: relative; }
.section-alt { background: var(--bg-alt); }

.section-header {
  max-width: 680px;
  margin: 0 auto 4rem;
  text-align: center;
}
.section-header p { margin-top: 1rem; font-size: 1.125rem; }

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1rem;
}
.section-label::before {
  content: '';
  display: block;
  width: 18px;
  height: 1px;
  background: var(--accent);
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-pill);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 0 32px var(--accent-glow-strong);
  transform: translateY(-2px);
}
.btn-secondary {
  background: transparent;
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent-light);
}

/* ============================================================
   NAVIGATION
   ============================================================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background var(--transition-slow), padding var(--transition-slow), border-color var(--transition-slow);
  border-bottom: 1px solid transparent;
}
#navbar.scrolled {
  background: rgba(3, 3, 3, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.875rem 0;
  border-bottom-color: var(--border);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 var(--container-px);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.625rem;
  text-decoration: none;
  flex-shrink: 0;
}
.nav-logo-img {
  height: 36px;
  width: auto;
  filter: invert(1); /* logo negro → blanco sobre fondo oscuro */
  display: block;
}
.logo-mark {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.8125rem;
  font-weight: 700;
  color: #fff;
}
.logo-text {
  font-family: var(--font-sans);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: -0.01em;
}
.logo-text em { font-style: normal; color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.125rem;
}
.nav-links a {
  padding: 0.5rem 0.875rem;
  font-size: 0.9375rem;
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  transition: color var(--transition);
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 4px;
  left: 0.875rem;
  right: 0.875rem;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.nav-links a:hover { color: var(--text); }
.nav-links a:hover::after { transform: scaleX(1); }

.nav-cta {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 0.6rem 1.25rem !important;
  border-radius: var(--radius-pill) !important;
}
.nav-cta:hover { background: var(--accent-light) !important; box-shadow: 0 0 20px var(--accent-glow); }
.nav-cta::after { display: none !important; }

.lang-switch { margin-left: 0.75rem; }
.lang-switch a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--text-muted) !important;
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.3rem 0.6rem !important;
  transition: color var(--transition), border-color var(--transition);
}
.lang-switch a:hover {
  color: var(--accent) !important;
  border-color: var(--accent);
}
.lang-switch a::after { display: none !important; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  z-index: 1001;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 999px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   SKIP LINK
   ============================================================ */
.skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  z-index: 9999;
  padding: 0.75rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border-radius: 0 0 var(--radius) var(--radius);
  transition: top var(--transition);
  font-weight: 500;
}
.skip-link:focus { top: 0; }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding-top: 6rem;
  padding-bottom: 4rem;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 110% 65% at 50% -5%, rgba(95, 50, 115, 0.22) 0%, transparent 65%),
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: auto, 76px 76px, 76px 76px;
  background-position: center top, -1px -1px, -1px -1px;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 880px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  border: 1px solid rgba(95, 50, 115, 0.45);
  border-radius: var(--radius-pill);
  background: rgba(95, 50, 115, 0.1);
  font-size: 0.8rem;
  font-weight: 500;
  color: #a06ab8;
  margin-bottom: 2rem;
  letter-spacing: 0.06em;
}
.hero-badge svg { width: 13px; height: 13px; flex-shrink: 0; }

.hero-title { margin-bottom: 1.5rem; }
.hero-title .line-accent { color: var(--accent); display: block; }

.hero-subtitle {
  font-size: clamp(1rem, 2.2vw, 1.2rem);
  color: var(--text-muted);
  max-width: 620px;
  margin-bottom: 2.5rem;
  line-height: 1.75;
}

.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  row-gap: 1.25rem;
  padding-top: 2.5rem;
  border-top: 1px solid var(--border);
}
.stat { display: flex; flex-direction: column; gap: 0.25rem; padding-right: 2.5rem; }
.stat:last-child { padding-right: 0; }
.stat-number {
  font-family: var(--font-display);
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--text);
  line-height: 1;
}
.stat-label { font-size: 0.8rem; color: var(--text-muted); }
.stat-divider { width: 1px; height: 2.25rem; background: var(--border); margin-right: 2.5rem; }

/* ============================================================
   WHY US
   ============================================================ */
.why-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.why-card {
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), transform var(--transition-slow);
}
.why-card:hover { border-color: rgba(95, 50, 115, 0.5); transform: translateY(-4px); }

.why-icon {
  width: 48px; height: 48px;
  background: rgba(95, 50, 115, 0.1);
  border: 1px solid rgba(95, 50, 115, 0.25);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
}
.why-icon svg { width: 22px; height: 22px; }
.why-card h3 { font-size: 1.1rem; margin-bottom: 0.625rem; }
.why-card p { font-size: 0.9375rem; }

/* ============================================================
   SERVICES
   ============================================================ */
.services-top {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.services-bottom {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: calc(66.666% + 0.5rem);
  margin: 0 auto;
}

.service-card {
  position: relative;
  padding: 2rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition-slow);
  overflow: hidden;
}
.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}
.service-card:hover {
  border-color: rgba(95, 50, 115, 0.4);
  box-shadow: 0 10px 48px rgba(95, 50, 115, 0.1);
  transform: translateY(-4px);
}
.service-card:hover::before { opacity: 1; }

.service-icon {
  width: 52px; height: 52px;
  background: rgba(95, 50, 115, 0.09);
  border: 1px solid rgba(95, 50, 115, 0.22);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 1.25rem;
  color: var(--accent);
  transition: background var(--transition), border-color var(--transition);
}
.service-card:hover .service-icon {
  background: rgba(95, 50, 115, 0.18);
  border-color: rgba(95, 50, 115, 0.5);
}
.service-icon svg { width: 24px; height: 24px; }

.service-tag {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 0.625rem;
  opacity: 0.8;
}
.service-card h3 { font-size: 1.125rem; margin-bottom: 0.75rem; }
.service-card > p { font-size: 0.9375rem; margin-bottom: 1.5rem; line-height: 1.65; }

.service-capabilities { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.capability-chip {
  padding: 0.28rem 0.7rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition);
}
.service-card:hover .capability-chip { border-color: rgba(95, 50, 115, 0.28); color: var(--text); }

/* ============================================================
   IMPACT METRICS
   ============================================================ */
.impact-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.impact-item {
  padding: 3rem 2rem;
  background: var(--bg-card);
  text-align: center;
}
.impact-number {
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.75rem);
  font-weight: 700;
  color: var(--text);
  line-height: 1;
  margin-bottom: 0.5rem;
  display: block;
}
.impact-number em { font-style: normal; color: var(--accent); }
.impact-label { font-size: 0.9rem; color: var(--text-muted); margin: 0; }

/* ============================================================
   CASE STUDIES
   ============================================================ */
.cases-top {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 1.5rem;
}
.cases-bottom {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
  max-width: calc(66.666% + 0.5rem);
  margin: 0 auto;
}
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition), transform var(--transition-slow);
}
.case-card:hover { border-color: rgba(95, 50, 115, 0.4); transform: translateY(-4px); }

.case-card-top { padding: 2rem 2rem 1rem; }
.case-category {
  display: inline-block;
  padding: 0.28rem 0.75rem;
  background: rgba(95, 50, 115, 0.1);
  border: 1px solid rgba(95, 50, 115, 0.22);
  border-radius: var(--radius-pill);
  font-size: 0.72rem;
  font-weight: 500;
  color: #a06ab8;
  margin-bottom: 0.875rem;
}
.case-card h3 { font-size: 1.0625rem; }
.case-card-body { padding: 0.75rem 2rem 2rem; }
.case-card-body p { font-size: 0.9375rem; margin-bottom: 1.5rem; }
.case-result {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1rem;
  background: rgba(95, 50, 115, 0.07);
  border: 1px solid rgba(95, 50, 115, 0.18);
  border-radius: var(--radius);
}
.case-dot { width: 8px; height: 8px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }
.case-result span { font-size: 0.875rem; font-weight: 600; color: #a06ab8; }

/* ============================================================
   PROCESS
   ============================================================ */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 31px;
  left: calc(12.5% + 1.5rem);
  right: calc(12.5% + 1.5rem);
  height: 1px;
  background: linear-gradient(90deg, var(--accent) 0%, var(--border) 40%, var(--border) 60%, var(--accent) 100%);
}
.process-step { position: relative; z-index: 1; text-align: center; padding: 0 1rem; }
.step-num {
  width: 62px; height: 62px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 1.5rem;
  font-family: var(--font-sans);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--accent);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition), color var(--transition);
}
.process-step:hover .step-num {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  box-shadow: 0 0 32px var(--accent-glow-strong);
}
.process-step h3 { font-size: 1rem; margin-bottom: 0.625rem; }
.process-step p { font-size: 0.875rem; line-height: 1.65; }

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}
.about-content .section-label { justify-content: flex-start; }
.about-content h2 { margin-bottom: 1.5rem; }
.about-content p { margin-bottom: 1.125rem; font-size: 1.0625rem; }

.about-values { display: flex; flex-wrap: wrap; gap: 0.625rem; margin-top: 2rem; }
.value-chip {
  padding: 0.45rem 1rem;
  background: rgba(95, 50, 115, 0.08);
  border: 1px solid rgba(95, 50, 115, 0.22);
  border-radius: var(--radius-pill);
  font-size: 0.875rem;
  color: #a06ab8;
  font-weight: 500;
  transition: background var(--transition), border-color var(--transition);
}
.value-chip:hover { background: rgba(95, 50, 115, 0.18); border-color: var(--accent); }

.about-visual-inner {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  position: relative;
  overflow: hidden;
}
.about-visual-inner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(95, 50, 115, 0.12) 0%, transparent 60%);
  pointer-events: none;
}
.about-stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}
.about-stat {
  text-align: center;
  padding: 1.5rem;
  background: rgba(255, 255, 255, 0.025);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.about-stat-num {
  font-family: var(--font-display);
  font-size: 2.125rem;
  font-weight: 700;
  color: var(--text);
  display: block;
  line-height: 1;
  margin-bottom: 0.375rem;
}
.about-stat-num em { font-style: normal; color: var(--accent); }
.about-stat p { font-size: 0.8rem; margin: 0; }

/* ============================================================
   TECH STACK
   ============================================================ */
.tech-categories { display: flex; flex-direction: column; gap: 2.5rem; }
.tech-cat-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-subtle);
  margin-bottom: 0.875rem;
}
.tech-tags { display: flex; flex-wrap: wrap; gap: 0.625rem; }
.tech-tag {
  padding: 0.45rem 1.125rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
  cursor: default;
}
.tech-tag:hover {
  color: var(--accent-light);
  border-color: rgba(95, 50, 115, 0.4);
  background: rgba(95, 50, 115, 0.06);
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 5rem;
  align-items: start;
}
.contact-info h2 { margin-bottom: 1rem; }
.contact-info > p { font-size: 1.0625rem; margin-bottom: 2.5rem; }

.contact-details { display: flex; flex-direction: column; gap: 1.25rem; }
.contact-detail { display: flex; align-items: center; gap: 1rem; }
.contact-icon {
  width: 40px; height: 40px;
  background: rgba(95, 50, 115, 0.09);
  border: 1px solid rgba(95, 50, 115, 0.2);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  color: var(--accent);
}
.contact-icon svg { width: 17px; height: 17px; }
.contact-detail-text small { font-size: 0.72rem; color: var(--text-subtle); display: block; }
.contact-detail-text span { font-size: 0.9375rem; color: var(--text); }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-group { display: flex; flex-direction: column; gap: 0.5rem; margin-bottom: 1.125rem; }
.form-group:last-of-type { margin-bottom: 0; }
.form-group label { font-size: 0.875rem; font-weight: 500; color: var(--text); }
.form-group label .req { color: var(--accent); margin-left: 2px; }

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 0.75rem 1rem;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-size: 0.9375rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-group select {
  appearance: none;
  -webkit-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24'%3E%3Cpath stroke='%23666' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round' d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  background-size: 18px;
  padding-right: 2.5rem;
}
.form-group select option { background: #1a1a1a; color: var(--text); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--text-subtle); }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-privacy { font-size: 0.78rem; color: var(--text-subtle); margin-top: 1rem; text-align: center; }

/* Validación de campos */
.form-group input.field-error,
.form-group select.field-error,
.form-group textarea.field-error {
  border-color: #c0392b;
  outline: none;
  box-shadow: 0 0 0 3px rgba(192, 57, 43, 0.15);
}
.field-hint {
  font-size: 0.78rem;
  color: #e74c3c;
  margin-top: -0.25rem;
}

/* ============================================================
   FOOTER
   ============================================================ */
footer {
  background: #000;
  border-top: 1px solid var(--border);
  padding: 4.5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}
.footer-brand .nav-logo { margin-bottom: 1rem; }
.footer-brand p { font-size: 0.9rem; color: var(--text-subtle); max-width: 230px; line-height: 1.65; margin-bottom: 1.5rem; }

.footer-social { display: flex; gap: 0.75rem; }
.social-link {
  width: 36px; height: 36px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  color: var(--text-muted);
  transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.social-link:hover { color: var(--accent); border-color: rgba(95, 50, 115, 0.4); background: rgba(95, 50, 115, 0.07); }
.social-link svg { width: 16px; height: 16px; }

.footer-col h4 { font-size: 0.875rem; font-weight: 600; color: var(--text); margin-bottom: 1.25rem; }
.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col ul a { font-size: 0.875rem; color: var(--text-subtle); transition: color var(--transition); }
.footer-col ul a:hover { color: var(--accent); }

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom p { font-size: 0.85rem; color: var(--text-subtle); }
.footer-links-row { display: flex; align-items: center; gap: 1.5rem; }
.footer-links-row a { font-size: 0.85rem; color: var(--text-subtle); transition: color var(--transition); }
.footer-links-row a:hover { color: var(--accent); }
.footer-ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.375rem;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-subtle);
  padding: 0.25rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-pill);
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 650ms ease, transform 650ms ease;
}
.reveal.revealed { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 100ms; }
.reveal-delay-2 { transition-delay: 200ms; }
.reveal-delay-3 { transition-delay: 300ms; }
.reveal-delay-4 { transition-delay: 400ms; }

/* ============================================================
   ACCESSIBILITY
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ============================================================
   RESPONSIVE — TABLET (≤ 1024px)
   ============================================================ */
@media (max-width: 1024px) {
  .why-grid { grid-template-columns: 1fr 1fr; }
  .services-top { grid-template-columns: 1fr 1fr; }
  .services-bottom { max-width: 100%; }
  .impact-grid { grid-template-columns: repeat(2, 1fr); }
  .cases-top { grid-template-columns: 1fr 1fr; }
  .cases-bottom { max-width: 100%; }
  .process-steps { grid-template-columns: 1fr 1fr; }
  .process-steps::before { display: none; }
  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

/* ============================================================
   RESPONSIVE — MOBILE (≤ 768px)
   ============================================================ */
@media (max-width: 768px) {
  .nav-links { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    flex-direction: column;
    position: fixed;
    inset: 0;
    background: rgba(3, 3, 3, 0.97);
    backdrop-filter: blur(16px);
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    z-index: 999;
    animation: menuFadeIn 200ms ease;
  }
  .nav-links.open a { font-size: 1.375rem; padding: 0.875rem 2rem; }
  .nav-links.open .nav-cta {
    margin-top: 1rem;
    padding: 0.875rem 2.5rem !important;
    border-radius: var(--radius-pill) !important;
  }
  .nav-links.open a::after { display: none; }

  .why-grid { grid-template-columns: 1fr; }
  .services-top { grid-template-columns: 1fr; }
  .services-bottom { max-width: 100%; grid-template-columns: 1fr; }
  .cases-top { grid-template-columns: 1fr; }
  .cases-bottom { max-width: 100%; grid-template-columns: 1fr; }
  .process-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; align-items: flex-start; gap: 1.25rem; }
  .stat-divider { width: 40px; height: 1px; margin: 0; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .form-row { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .footer-links-row { flex-direction: column; gap: 0.75rem; }
}

/* ============================================================
   RESPONSIVE — SMALL MOBILE (≤ 480px)
   ============================================================ */
@media (max-width: 480px) {
  .impact-grid { grid-template-columns: 1fr 1fr; }
  .about-stats-grid { grid-template-columns: 1fr 1fr; }
  .contact-form { padding: 1.75rem; }
}

@keyframes menuFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}