/* =============================================
   Gass Marketing AI — Global Stylesheet
   ============================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
  --bg-deep:    #0d0d1a;
  --bg-mid:     #1a1a2e;
  --bg-card:    #16213e;
  --bg-card2:   #0f3460;
  --cyan:       #00d4ff;
  --cyan-dark:  #0099cc;
  --cyan-glow:  rgba(0, 212, 255, 0.15);
  --cyan-glow2: rgba(0, 212, 255, 0.05);
  --white:      #ffffff;
  --gray-light: #e2e8f0;
  --gray-mid:   #94a3b8;
  --gray-dark:  #475569;
  --radius:     12px;
  --radius-lg:  20px;
  --transition: 0.3s ease;
  --shadow-cyan: 0 0 30px rgba(0, 212, 255, 0.12);
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  background-color: var(--bg-deep);
  color: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}

/* ---- Skip Link (Accessibility) ---- */
.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  z-index: 9999;
  background: #00d4ff;
  color: #000;
  padding: 8px 16px;
  font-weight: 600;
  text-decoration: none;
}
.skip-link:focus { left: 0; }

/* ---- Focus Indicators (Accessibility) ---- */
*:focus { outline: 2px solid #00d4ff; outline-offset: 2px; }
*:focus:not(:focus-visible) { outline: none; }
:focus-visible { outline: 2px solid #00d4ff; outline-offset: 2px; }

/* ---- Visually Hidden (Accessibility) ---- */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

a { color: var(--cyan); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--white); }

img { max-width: 100%; display: block; }

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

p { color: var(--gray-light); }

/* ---- Utility ---- */
.container { max-width: 1140px; margin: 0 auto; padding: 0 24px; }
.text-cyan { color: var(--cyan); }
.text-center { text-align: center; }
.mt-sm { margin-top: 12px; }
.mt-md { margin-top: 24px; }
.mt-lg { margin-top: 48px; }

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 8px;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
}

.btn-primary {
  background: var(--cyan);
  color: var(--bg-deep);
  box-shadow: 0 0 20px rgba(0, 212, 255, 0.35);
}
.btn-primary:hover {
  background: var(--white);
  color: var(--bg-deep);
  box-shadow: 0 0 30px rgba(0, 212, 255, 0.5);
  transform: translateY(-1px);
}

.btn-outline {
  background: transparent;
  color: var(--cyan);
  border: 1.5px solid var(--cyan);
}
.btn-outline:hover {
  background: var(--cyan-glow);
  color: var(--cyan);
  transform: translateY(-1px);
}

/* ---- Navbar ---- */
.navbar {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(13, 13, 26, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  padding: 0 24px;
}

.nav-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.nav-logo img {
  height: 40px;
  width: auto;
  mix-blend-mode: screen; /* black bg disappears on dark nav */
  border-radius: 0;
}

.nav-logo-text {
  font-size: 1rem;
  font-weight: 800;
  color: var(--cyan);
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-logo-text span { color: var(--cyan); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-links a {
  color: var(--gray-light);
  font-size: 0.9rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 6px;
  transition: all var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--cyan);
  background: var(--cyan-glow2);
}

.nav-cta {
  background: var(--cyan);
  color: var(--bg-deep) !important;
  font-weight: 600 !important;
  padding: 8px 18px !important;
}
.nav-cta:hover {
  background: var(--white) !important;
  color: var(--bg-deep) !important;
}

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  border: none;
  background: none;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}

/* ---- Neon hero logo ---- */
.hero-logo-img {
  display: block;
  max-width: 420px;
  width: 70%;
  margin-bottom: 28px;
  mix-blend-mode: screen;
  filter: drop-shadow(0 0 32px rgba(0,212,255,0.5));
}

/* ---- Hero ---- */
.hero {
  min-height: 92vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 80px 24px;
}

.hero::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -10%;
  width: 70%;
  height: 120%;
  background: radial-gradient(ellipse at center, rgba(0, 212, 255, 0.08) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -20%;
  right: -5%;
  width: 50%;
  height: 80%;
  background: radial-gradient(ellipse at center, rgba(0, 153, 204, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 1140px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--cyan-glow);
  border: 1px solid rgba(0, 212, 255, 0.3);
  color: var(--cyan);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.hero-badge::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 8px var(--cyan);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero h1 {
  font-size: clamp(2.6rem, 6vw, 4.5rem);
  font-weight: 900;
  line-height: 1.1;
  margin-bottom: 24px;
  max-width: 760px;
}

.hero h1 .highlight {
  color: var(--cyan);
  text-shadow: 0 0 40px rgba(0, 212, 255, 0.4);
}

.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: var(--gray-mid);
  max-width: 560px;
  margin-bottom: 40px;
  font-weight: 400;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ---- Stats Bar ---- */
.stats-bar {
  background: var(--bg-mid);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
  border-bottom: 1px solid rgba(0, 212, 255, 0.1);
  padding: 32px 24px;
}

.stats-inner {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item { padding: 8px; }

.stat-number {
  font-size: 2rem;
  font-weight: 800;
  color: var(--cyan);
  display: block;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--gray-mid);
  font-weight: 500;
}

/* ---- Section ---- */
.section {
  padding: 96px 24px;
}

.section-alt { background: var(--bg-mid); }

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 64px;
}

.section-label {
  display: inline-block;
  color: var(--cyan);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 12px;
}

.section-header h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.section-header p {
  color: var(--gray-mid);
  font-size: 1.05rem;
}

/* ---- Service Cards ---- */
.services-grid {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

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

.service-icon {
  width: 52px;
  height: 52px;
  background: var(--cyan-glow);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--white);
}

.service-card p {
  font-size: 0.9rem;
  color: var(--gray-mid);
  line-height: 1.7;
}

/* ---- Case Study Cards ---- */
.case-grid {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 28px;
}

.case-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
}

.case-card:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.case-card-top {
  background: var(--bg-card2);
  padding: 32px 28px;
  border-bottom: 1px solid rgba(0, 212, 255, 0.08);
}

.case-industry {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 8px;
}

.case-card h3 {
  font-size: 1.3rem;
  margin-bottom: 8px;
}

.case-card-top p {
  font-size: 0.88rem;
  color: var(--gray-mid);
}

.case-card-body { padding: 28px; }

.case-results {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.result-item { text-align: center; }

.result-number {
  display: block;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--cyan);
  margin-bottom: 2px;
}

.result-label {
  font-size: 0.75rem;
  color: var(--gray-mid);
  font-weight: 500;
}

.case-tags { display: flex; gap: 8px; flex-wrap: wrap; }

.tag {
  background: var(--cyan-glow);
  border: 1px solid rgba(0, 212, 255, 0.2);
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: 100px;
}

/* ---- Blog Cards ---- */
.blog-grid {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}

.blog-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}

.blog-card:hover {
  border-color: rgba(0, 212, 255, 0.25);
  transform: translateY(-4px);
  box-shadow: var(--shadow-cyan);
}

.blog-card-img {
  height: 180px;
  background: var(--bg-card2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2.5rem;
  position: relative;
  overflow: hidden;
}

.blog-card-img::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,212,255,0.08), transparent);
}

.blog-card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.blog-category {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 8px;
}

.blog-card h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  line-height: 1.4;
}

.blog-card p {
  font-size: 0.875rem;
  color: var(--gray-mid);
  line-height: 1.7;
  flex: 1;
}

.blog-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 20px;
  padding-top: 16px;
  border-top: 1px solid rgba(255,255,255,0.06);
}

.blog-date {
  font-size: 0.78rem;
  color: var(--gray-dark);
}

.blog-read {
  font-size: 0.78rem;
  color: var(--cyan);
  font-weight: 600;
}

/* ---- CTA Section ---- */
.cta-section {
  padding: 96px 24px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 600px;
  height: 300px;
  background: radial-gradient(ellipse, rgba(0, 212, 255, 0.1) 0%, transparent 70%);
  pointer-events: none;
}

.cta-inner {
  max-width: 640px;
  margin: 0 auto;
  position: relative;
  z-index: 2;
}

.cta-inner h2 {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  margin-bottom: 16px;
}

.cta-inner p {
  color: var(--gray-mid);
  font-size: 1.05rem;
  margin-bottom: 36px;
}

/* ---- Contact Form ---- */
.contact-layout {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 64px;
  align-items: start;
}

.contact-info h2 { font-size: 2rem; margin-bottom: 16px; }
.contact-info p { color: var(--gray-mid); margin-bottom: 32px; }

.contact-detail {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.contact-detail-icon {
  width: 40px;
  height: 40px;
  background: var(--cyan-glow);
  border: 1px solid rgba(0, 212, 255, 0.2);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  flex-shrink: 0;
}

.contact-detail-text { font-size: 0.9rem; color: var(--gray-light); }

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-light);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.15);
  border-radius: 8px;
  color: var(--white);
  font-family: inherit;
  font-size: 0.95rem;
  padding: 14px 16px;
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: rgba(0, 212, 255, 0.5);
  box-shadow: 0 0 0 3px rgba(0, 212, 255, 0.08);
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: var(--gray-dark); }

.form-group textarea { resize: vertical; min-height: 140px; }

.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---- Footer ---- */
.footer {
  background: var(--bg-mid);
  border-top: 1px solid rgba(0, 212, 255, 0.1);
  padding: 64px 24px 32px;
}

.footer-inner {
  max-width: 1140px;
  margin: 0 auto;
}

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .nav-logo { margin-bottom: 16px; }
.footer-brand p {
  font-size: 0.875rem;
  color: var(--gray-mid);
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-mid);
  margin-bottom: 16px;
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 10px; }
.footer-col a {
  font-size: 0.875rem;
  color: var(--gray-mid);
  transition: color var(--transition);
}
.footer-col a:hover { color: var(--cyan); }

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.825rem;
  color: var(--gray-dark);
}

.footer-bottom a {
  color: var(--gray-dark);
  font-size: 0.825rem;
}
.footer-bottom a:hover { color: var(--cyan); }

/* ---- About Page ---- */
.about-hero { padding: 96px 24px 64px; }
.about-hero-content { max-width: 1140px; margin: 0 auto; }
.about-hero h1 { font-size: clamp(2rem, 5vw, 3.5rem); margin-bottom: 20px; }
.about-hero p { max-width: 640px; font-size: 1.1rem; color: var(--gray-mid); }

.values-grid {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}

.value-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: var(--radius);
  padding: 28px;
  transition: all var(--transition);
}

.value-card:hover {
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
}

.value-icon { font-size: 1.8rem; margin-bottom: 14px; }
.value-card h3 { font-size: 0.95rem; margin-bottom: 8px; }
.value-card p { font-size: 0.875rem; color: var(--gray-mid); }

.team-grid {
  max-width: 1140px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 28px;
}

.team-card {
  background: var(--bg-card);
  border: 1px solid rgba(0, 212, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 32px 24px;
  text-align: center;
  transition: all var(--transition);
}

.team-card:hover {
  border-color: rgba(0, 212, 255, 0.2);
  transform: translateY(-2px);
}

.team-avatar {
  width: 80px;
  height: 80px;
  background: var(--bg-card2);
  border: 2px solid rgba(0, 212, 255, 0.2);
  border-radius: 50%;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
}

.team-card h3 { font-size: 1rem; margin-bottom: 4px; }
.team-card p { font-size: 0.85rem; color: var(--cyan); font-weight: 500; }

/* ---- Page Hero (inner pages) ---- */
.page-hero {
  padding: 80px 24px 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.page-hero::before {
  content: '';
  position: absolute;
  top: -50%; left: 50%;
  transform: translateX(-50%);
  width: 600px;
  height: 400px;
  background: radial-gradient(ellipse, rgba(0, 212, 255, 0.07) 0%, transparent 70%);
  pointer-events: none;
}

.page-hero-content { position: relative; z-index: 2; }
.page-hero h1 { font-size: clamp(2rem, 5vw, 3rem); margin-bottom: 16px; }
.page-hero p { font-size: 1.1rem; color: var(--gray-mid); max-width: 520px; margin: 0 auto; }

/* ---- Privacy Page ---- */
.prose {
  max-width: 760px;
  margin: 0 auto;
  padding: 64px 24px;
}

.prose h2 { font-size: 1.4rem; margin: 40px 0 12px; color: var(--cyan); }
.prose h3 { font-size: 1.1rem; margin: 28px 0 8px; }
.prose p { margin-bottom: 16px; color: var(--gray-light); line-height: 1.8; }
.prose ul, .prose ol { padding-left: 24px; margin-bottom: 16px; }
.prose li { color: var(--gray-light); line-height: 1.8; margin-bottom: 6px; }
.prose a { color: var(--cyan); }
.prose hr { border: none; border-top: 1px solid rgba(255,255,255,0.08); margin: 36px 0; }

/* ---- Animations ---- */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 68px;
    left: 0; right: 0;
    background: rgba(13, 13, 26, 0.98);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    padding: 16px;
    gap: 4px;
  }
  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }
  .navbar { position: relative; }

  .stats-inner { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 32px; }
  .contact-layout { grid-template-columns: 1fr; gap: 40px; }
  .form-row { grid-template-columns: 1fr; }
  .case-results { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .stats-inner { grid-template-columns: 1fr 1fr; }
  .hero-actions { flex-direction: column; }
  .footer-top { grid-template-columns: 1fr; }
}

/* Particle canvas hero */
#particle-canvas {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  z-index: 0;
  pointer-events: none;
}
.hero {
  position: relative;
  overflow: hidden;
}
.hero-content {
  position: relative;
  z-index: 1;
}