/* ===================================
   Main Stylesheet - RBVEA Premium Dark
   =================================== */

@import url('variables.css');
@import url('components.css');
@import url('animations.css');
@import url('responsive.css');

/* ===================================
   Base & Reset
   =================================== */

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

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

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

/* Grain texture overlay */
.grain-overlay {
  position: fixed;
  inset: -200%;
  width: 400%;
  height: 400%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  pointer-events: none;
  z-index: 9999;
  animation: grain 8s steps(10) infinite;
  opacity: 0.4;
}

/* ===================================
   Typography
   =================================== */

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-base);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-sm);
}

p { margin-bottom: var(--spacing-sm); }

a {
  color: var(--color-text-accent);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover { color: var(--color-accent-end); }

a:focus-visible {
  outline: 2px solid var(--color-accent-start);
  outline-offset: 2px;
}

/* ===================================
   Layout
   =================================== */

.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.section {
  padding: var(--spacing-3xl) 0;
  position: relative;
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.section-heading {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-sm);
  letter-spacing: -1px;
}

.section-subheading {
  font-size: var(--font-size-md);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0 auto;
  line-height: var(--line-height-relaxed);
}

/* ===================================
   Navigation
   =================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  transition: all var(--transition-normal);
  background: transparent;
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.8);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--color-bg-glass-border);
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.nav-brand {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: 3px;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: var(--spacing-xs);
  align-items: center;
}

.nav-link {
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
  font-size: var(--font-size-xs);
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  transition: all var(--transition-normal);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nav-link:hover {
  color: var(--color-text-primary);
  background: rgba(255, 255, 255, 0.05);
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  gap: 5px;
  z-index: var(--z-sticky);
}

.nav-toggle span {
  width: 24px;
  height: 1.5px;
  background-color: var(--color-text-primary);
  transition: all var(--transition-normal);
  border-radius: 2px;
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===================================
   Hero Section
   =================================== */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

/* Particle canvas background */
#particles-canvas {
  position: absolute;
  inset: 0;
  z-index: var(--z-particles);
}

/* Gradient orb */
.hero-orb {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%,
    rgba(59, 130, 246, 0.25),
    rgba(6, 182, 212, 0.15),
    transparent 70%
  );
  filter: blur(60px);
  animation: orbFloat 20s ease-in-out infinite;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: var(--z-content);
  max-width: 900px;
  padding: 0 var(--spacing-md);
}

.hero-title {
  font-size: clamp(3.5rem, 12vw, var(--font-size-6xl));
  font-weight: var(--font-weight-bold);
  color: white;
  letter-spacing: -3px;
  margin-bottom: var(--spacing-md);
  animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  opacity: 0;
}

.hero-tagline {
  font-size: clamp(1.25rem, 3vw, var(--font-size-xl));
  font-weight: var(--font-weight-normal);
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
  animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.15s forwards;
  opacity: 0;
}

.hero-subtitle {
  font-size: clamp(0.9375rem, 1.5vw, var(--font-size-md));
  color: var(--color-text-tertiary);
  max-width: 600px;
  margin: 0 auto var(--spacing-lg);
  line-height: var(--line-height-relaxed);
  animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.3s forwards;
  opacity: 0;
}

.hero-ctas {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: center;
  flex-wrap: wrap;
  animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.45s forwards;
  opacity: 0;
}

.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  color: var(--color-text-tertiary);
  font-size: var(--font-size-xs);
  letter-spacing: 2px;
  text-transform: uppercase;
  animation: titleReveal 1s cubic-bezier(0.16, 1, 0.3, 1) 0.6s forwards;
  opacity: 0;
}

.scroll-indicator .scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--color-text-tertiary), transparent);
  animation: scrollBounce 2s ease-in-out infinite;
}

/* ===================================
   Services Section
   =================================== */

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--spacing-md);
}

.service-card .card-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-xs);
}

.service-card .card-desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* ===================================
   Expertise Section - Marquee Tags
   =================================== */

.expertise-wrapper {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, black 10%, black 90%, transparent);
}

.expertise-marquee {
  display: flex;
  gap: var(--spacing-md);
  animation: marquee 30s linear infinite;
  width: max-content;
}

.expertise-marquee:hover {
  animation-play-state: paused;
}

.expertise-tag {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.875rem 1.5rem;
  background: var(--color-bg-card);
  border: 1px solid var(--color-bg-glass-border);
  border-radius: var(--radius-full);
  white-space: nowrap;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-primary);
  transition: all var(--transition-normal);
}

.expertise-tag:hover {
  border-color: var(--color-accent-start);
  background: var(--color-accent-subtle);
}

.expertise-tag svg {
  color: var(--color-text-accent);
  flex-shrink: 0;
}

/* ===================================
   Approach Section - Horizontal Steps
   =================================== */

.approach-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  position: relative;
}

.approach-step {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  position: relative;
}

.step-number {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  opacity: 0.2;
  line-height: 1;
  margin-bottom: var(--spacing-sm);
}

.approach-step h4 {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-xs);
}

.approach-step p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  line-height: var(--line-height-relaxed);
  margin-bottom: 0;
}

/* Connecting line between steps */
.approach-step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 50%;
  right: 0;
  transform: translateX(50%);
  width: var(--spacing-md);
  height: 1px;
  background: linear-gradient(90deg, var(--color-bg-glass-border), transparent);
  display: none;
}

@media (min-width: 1024px) {
  .approach-step:not(:last-child)::after {
    display: block;
  }
}

/* ===================================
   Trust / Stats Section
   =================================== */

.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
}

.stat-value {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-xs);
  line-height: 1.3;
  white-space: nowrap;
}

.stat-label {
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
  text-transform: uppercase;
  letter-spacing: 2px;
}

/* Differentiators */
.diff-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.diff-card {
  text-align: center;
}

.diff-card .card-icon-wrap {
  margin: 0 auto var(--spacing-md);
}

.diff-card h4 {
  font-size: var(--font-size-md);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  margin-bottom: var(--spacing-xs);
}

.diff-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
}

/* ===================================
   About Section
   =================================== */

#about .about-content {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.about-text {
  font-size: var(--font-size-md);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

.about-text:first-child {
  font-size: var(--font-size-lg);
  color: var(--color-text-primary);
}

/* ===================================
   Contact Section
   =================================== */

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
  max-width: 700px;
  margin: 0 auto;
}

.contact-card {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
}

.contact-card svg {
  color: var(--color-text-accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.contact-card h4 {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-heading);
  margin-bottom: 0.375rem;
}

.contact-card p {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  margin-bottom: 0;
  line-height: var(--line-height-relaxed);
}

.contact-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-text-accent);
  transition: color var(--transition-normal);
}

.contact-link:hover {
  color: var(--color-accent-end);
}

/* ===================================
   Footer
   =================================== */

.footer {
  border-top: 1px solid var(--color-bg-glass-border);
  padding: var(--spacing-md) 0;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: var(--font-size-xs);
  color: var(--color-text-tertiary);
}