/* ===================================
   EternalTech Main Stylesheet
   Base Styles and Layouts
   =================================== */

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

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

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

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

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

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

h1 {
  font-size: clamp(2.5rem, 5vw, 3.5rem);
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
}

h3 {
  font-size: clamp(1.5rem, 3vw, 1.875rem);
}

h4 {
  font-size: var(--font-size-xl);
}

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

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

a:hover {
  color: var(--color-primary-dark);
}

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

.lead {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-light);
}
/* lead paragraph styles */

/* Page container used throughout to center content */
.container {
  max-width: var(--container-max);
  width: 100%;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
}

@media (min-width: 768px) {
  .container {
    padding: 0 var(--spacing-lg);
  }
}

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

@media (min-width: 768px) {
  section {
    padding: var(--spacing-4xl) 0;
  }
}

/* ===== Header & Navigation ===== */

.site-header {
  position: fixed;
  top: 0;
.hero-illustration { display: none; }

@media (min-width: 992px) {
  .hero-illustration { display: block; position: relative; z-index:1; }
}
  left: 0;
  right: 0;
  z-index: var(--z-sticky);
  /* Default: slightly translucent (visible on top) */
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(8px);
  transition: background-color var(--transition-base), box-shadow var(--transition-base), backdrop-filter var(--transition-base);
  box-shadow: none;
}

.site-header.scrolled {
  /* When scrolled: keep a subtle translucent backdrop for legibility */
  background-color: rgba(255,255,255,0.6);
  backdrop-filter: blur(6px);
  box-shadow: 0 1px 0 rgba(16,24,40,0.04);
}

/* Dark theme scrolled header */
:root[data-theme='dark'] .site-header.scrolled {
  background-color: rgba(6,10,18,0.5);
  box-shadow: 0 1px 0 rgba(255,255,255,0.02);
}

.navbar {
  padding: var(--spacing-sm) 0;
}

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

.nav-brand a {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-text);
  letter-spacing: -0.02em;
}

.logo-text {
  color: var(--color-text);
  font-weight: 600;
  letter-spacing: -0.03em;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
  transition: opacity var(--transition-fast);
}

.logo-img:hover {
  opacity: 0.8;
}

@media (max-width: 767px) {
  .logo-img {
    height: 32px;
  }
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--spacing-xs);
  z-index: calc(var(--z-sticky) + 10);
}

.hamburger {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  position: relative;
  transition: background-color var(--transition-fast);
}

.hamburger::before,
.hamburger::after {
  content: '';
  position: absolute;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  transition: transform var(--transition-base);
}

.hamburger::before {
  top: -8px;
}

.hamburger::after {
  top: 8px;
}

.nav-toggle.active .hamburger {
  background-color: transparent;
}

.nav-toggle.active .hamburger::before {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active .hamburger::after {
  transform: rotate(-45deg) translate(6px, -6px);
}

.nav-menu {
  display: flex;
  align-items: center;
}

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

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--color-text);
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: color var(--transition-fast);
}

/* When header is transparent (scrolled) make links high-contrast over hero */
.site-header.scrolled.invert-links .nav-link {
  color: white;
  text-shadow: 0 1px 2px rgba(0,0,0,0.35);
}

.site-header.scrolled.invert-links .nav-toggle .hamburger,
.site-header.scrolled.invert-links .hamburger,
.site-header.scrolled.invert-links .logo-text {
  color: white;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-fast);
}

.nav-link:hover::after,
.nav-link.active::after {
  width: 100%;
}

.nav-link.nav-cta {
  background: var(--gradient-primary);
  color: white;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-lg);
}

.nav-link.nav-cta::after {
  display: none;
}

.nav-link.nav-cta:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
  /* Visible by default so content is shown even if JS doesn't run */
  opacity: 1;
  transform: translateY(0);
  transition: opacity 520ms cubic-bezier(.16,.84,.28,1), transform 520ms cubic-bezier(.16,.84,.28,1);
}

/* Optional animated entry when JS triggers: add `.animate-entry` then `.visible` */
.hero-content.animate-entry {
  opacity: 0;
  transform: translateY(10px);
}
.hero-content.animate-entry.visible {
  opacity: 1;
  transform: translateY(0);
}
  opacity: 1;
  transform: translateY(0);
}

/* ===== Hero Background & Layout ===== */
.hero-background {
  position: absolute;
  inset: 0;
  z-index: 0;
  /* Stronger layered gradients for a richer, image-free hero */
  background-image:
    radial-gradient(900px 700px at 12% 22%, rgba(0,113,227,0.28) 0%, rgba(0,113,227,0.10) 22%, transparent 45%),
    radial-gradient(620px 520px at 88% 78%, rgba(96,191,248,0.18) 0%, rgba(96,191,248,0.06) 35%, transparent 65%),
    linear-gradient(135deg, rgba(0,113,227,0.04) 0%, rgba(96,191,248,0.03) 50%, rgba(255,255,255,0.98) 100%),
    linear-gradient(180deg, rgba(250,252,255,1) 0%, rgba(245,248,255,1) 100%);
  background-blend-mode: normal;
  background-size: cover;
  background-repeat: no-repeat;
  opacity: 1;
}

/* subtle decorative overlay to add depth without images */
.hero-background::before {
  content: '';
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(120deg, rgba(0,113,227,0.06), rgba(255,255,255,0));
  mix-blend-mode: normal;
  opacity: 0.18;
}

/* give the hero-section a very light base so gradients read on all browsers */
.hero-section {
  background-color: #f5f5f5;
}

/* ===== Hero Section ===== */
.hero-section {
  /* More compact hero: use 78vh to reduce white-space while staying tall */
  min-height: 78vh;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  justify-items: center;
  position: relative;
  padding: 2.5rem 0 3.5rem 0;
  overflow: hidden;
}

/* Hero badge */
.hero-badge {
  margin-bottom: var(--spacing-md);
  animation: fadeInDown 0.8s ease-out;
}

/* Hero stats */
.hero-stats {
  display: flex;
  gap: var(--spacing-xl);
  margin-top: var(--spacing-2xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(0, 0, 0, 0.1);
  animation: fadeInUp 1s ease-out 0.3s backwards;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--spacing-xs);
}

.hero-stat strong {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
}

.hero-stat span {
  font-size: var(--font-size-sm);
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

@media (max-width: 768px) {
  .hero-stats {
    gap: var(--spacing-md);
    flex-wrap: wrap;
  }

  .hero-stat {
    min-width: 80px;
  }
}

/* Floating animated elements */
.floating-element {
  position: absolute;
  border-radius: 50%;
  opacity: 0.15;
  filter: blur(40px);
}

.element-1 {
  width: 300px;
  height: 300px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  top: 10%;
  left: 5%;
  animation: float 20s ease-in-out infinite;
}

.element-2 {
  width: 200px;
  height: 200px;
  background: linear-gradient(135deg, var(--color-primary-light), var(--color-primary));
  top: 60%;
  right: 10%;
  animation: float 15s ease-in-out infinite reverse;
}

.element-3 {
  width: 250px;
  height: 250px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
  bottom: 20%;
  left: 50%;
  animation: float 18s ease-in-out infinite;
  animation-delay: 2s;
}

@keyframes float {
  0%, 100% {
    transform: translate(0, 0) rotate(0deg);
  }
  33% {
    transform: translate(30px, -30px) rotate(120deg);
  }
  66% {
    transform: translate(-20px, 20px) rotate(240deg);
  }
}

@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 980px;
  margin: 0 auto;
  opacity: 1;
  transform: translateY(0);
  transition: opacity 520ms cubic-bezier(.16,.84,.28,1), transform 520ms cubic-bezier(.16,.84,.28,1);
}

/* Larger screens: split layout with decorative side area (no image) */
@media (min-width: 992px) {
  .hero-section {
    grid-template-columns: 1fr 520px;
    gap: 2rem;
    padding-top: 3.25rem;
    padding-bottom: 3.25rem;
  }

  .hero-content {
    text-align: left;
    max-width: 680px;
    padding-left: var(--spacing-lg);
  }

  .hero-side-decor {
    display: block;
    width: 420px;
    height: 100%;
    align-self: center;
    justify-self: end;
    margin-right: var(--spacing-lg);
  }
}

.hero-title {
  font-size: clamp(2.25rem, 5.5vw, 3.6rem);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: clamp(1rem, 1.6vw, 1.125rem);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-lg);
  line-height: var(--line-height-relaxed);
}

.hero-cta {
  display: flex;
  gap: var(--spacing-sm);
  justify-content: flex-start;
  flex-wrap: wrap;
}

.hero-cta .btn {
  min-width: 140px;
}

/* ===== Trust Indicators Section ===== */

.trust-section {
  background-color: var(--color-bg);
  padding: var(--spacing-2xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-xl);
  text-align: center;
}

.stat-item {
  padding: var(--spacing-md);
}

.stat-icon {
  font-size: 3rem;
  margin-bottom: var(--spacing-sm);
  display: inline-block;
}

.stat-number {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
  line-height: 1;
}

.stat-label {
  font-size: var(--font-size-base);
  color: var(--color-text-light);
  font-weight: var(--font-weight-medium);
}

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

.services-section {
  background-color: var(--color-bg-light);
}

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  margin-bottom: var(--spacing-sm);
}

.section-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  transition: height 0.3s ease;
}

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

.about-section {
  background-color: var(--color-bg);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
}

.about-text {
  margin-bottom: var(--spacing-xl);
}

.about-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.feature-item {
  display: flex;
  gap: var(--spacing-sm);
  align-items: flex-start;
}

.feature-icon {
  font-size: 2rem;
  flex-shrink: 0;
}

.feature-content h4 {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-lg);
}

.feature-content p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ===== Integration Section ===== */

.integration-section {
  background-color: var(--color-bg-light);
}

.integration-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
}

.integration-item {
  background-color: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.integration-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.integration-name {
  font-weight: var(--font-weight-semibold);
  color: var(--color-text);
  display: block;
}

.integration-cta {
  text-align: center;
}

/* ===== CTA Section ===== */

.cta-section {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  padding: var(--spacing-4xl) 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
}

.cta-content {
  text-align: center;
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.cta-title {
  color: white;
  font-size: clamp(2rem, 4vw, 2.75rem);
  margin-bottom: var(--spacing-md);
}

.cta-subtitle {
  color: rgba(255, 255, 255, 0.9);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-2xl);
  line-height: var(--line-height-relaxed);
}

.cta-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.cta-buttons .btn-primary {
  background-color: white;
  color: var(--color-primary);
}

.cta-buttons .btn-primary:hover {
  background-color: rgba(255, 255, 255, 0.9);
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.2);
}

.cta-buttons .btn-secondary {
  background-color: transparent;
  color: white;
  border-color: white;
}

.cta-buttons .btn-secondary:hover {
  background-color: white;
  color: var(--color-primary);
}

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

.contact-section {
  background-color: var(--color-bg);
}

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-3xl);
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--spacing-sm);
  justify-items: center;
}

@media (min-width: 768px) {
  .contact-wrapper {
    grid-template-columns: 1.2fr 460px;
    justify-items: start;
    align-items: start;
  }
}

/* Contact form and info sizing */
.contact-form {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  width: 100%;
  max-width: 420px;
}

@media (max-width: 767px) {
  .contact-form,
  .contact-info {
    text-align: center;
  }
  .contact-form {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
  .contact-info .social-links {
    justify-content: center;
  }
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.info-item h4 {
  margin-bottom: var(--spacing-xs);
  font-size: var(--font-size-lg);
}

.info-item p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

.social-links {
  display: flex;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

.social-links a {
  padding: var(--spacing-xs) var(--spacing-sm);
  background-color: var(--color-bg-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.social-links a:hover {
  background-color: var(--color-primary);
  color: white;
  transform: translateY(-2px);
}

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

.site-footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

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

.footer-title {
  color: var(--color-bg);
  font-size: var(--font-size-lg);
  margin-bottom: var(--spacing-md);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--spacing-xs);
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-bg);
}

.social-links-footer {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-bottom {
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
  color: var(--color-gray-500);
}

/* ===== Animations ===== */

.animate-on-scroll {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ===== Utility Classes ===== */

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

.required {
  color: var(--color-error);
}