/* === CSS Variables / Design System === */
:root {
  --bg-primary: #1a1a1f;
  --bg-secondary: #27262e;
  --bg-card: #2d2c35;
  --text-primary: #ffffff;
  --text-secondary: #a0a0a0;
  --accent: #19f5aa;
  --accent-secondary: #3763f4;
  --border-color: #3a3944;
  --transition: 0.3s ease;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
  --shadow-hover: 0 8px 30px rgba(25, 245, 170, 0.15);
  --max-width: 1200px;
  --header-height: 72px;
}

[data-theme="light"] {
  --bg-primary: #f5f5f7;
  --bg-secondary: #ffffff;
  --bg-card: #ffffff;
  --text-primary: #1a1a1f;
  --text-secondary: #666666;
  --border-color: #e0e0e0;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 8px 30px rgba(25, 245, 170, 0.2);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  min-height: 100vh;
  transition: background-color var(--transition), color var(--transition);
}

a {
  color: inherit;
  text-decoration: none;
}

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

ul {
  list-style: none;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1rem;
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.25rem; }

p {
  margin-bottom: 1rem;
  color: var(--text-secondary);
}

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

.text-muted {
  color: var(--text-secondary);
}

/* === Container === */
.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all var(--transition);
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-primary);
}

.btn-primary:hover {
  background: #14d494;
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(25, 245, 170, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--text-primary);
  border: 2px solid var(--border-color);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* === Header / Navigation === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition);
}

.header.scrolled {
  background: rgba(26, 26, 31, 0.95);
  backdrop-filter: blur(10px);
}

[data-theme="light"] .header.scrolled {
  background: rgba(245, 245, 247, 0.95);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
}

.nav-logo img {
  height: 2.5rem;
  transition: filter var(--transition);
}

[data-theme="light"] .nav-logo img {
  filter: invert(1);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-weight: 500;
  color: var(--text-secondary);
  transition: color var(--transition);
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width var(--transition);
}

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

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.theme-toggle {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.5rem;
  border-radius: 50%;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--accent);
  background: var(--bg-secondary);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }

[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* Mobile Menu */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: all var(--transition);
}

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

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

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

.mobile-menu {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  padding: 2rem;
  transform: translateX(100%);
  transition: transform var(--transition);
  z-index: 999;
}

.mobile-menu.active {
  transform: translateX(0);
}

.mobile-menu .nav-links {
  flex-direction: column;
  align-items: flex-start;
  gap: 1.5rem;
}

.mobile-menu .nav-links a {
  font-size: 1.25rem;
}

/* === Hero Section === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: calc(var(--header-height) + 2rem) 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: url('../assets/img/header.jpg') center/cover no-repeat;
  opacity: 0.15;
}

.hero-content {
  text-align: center;
  max-width: 800px;
  position: relative;
  z-index: 1;
}

.hero-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 1rem;
}

.hero h1 {
  margin-bottom: 1.5rem;
}

.hero p {
  font-size: 1.25rem;
  max-width: 600px;
  margin: 0 auto 2rem;
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Page Hero (smaller) */
.page-hero {
  padding: calc(var(--header-height) + 4rem) 0 4rem;
  text-align: center;
  background: var(--bg-secondary);
}

.page-hero h1 {
  margin-bottom: 0.5rem;
}

/* === Sections === */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 3rem;
}

.section-label {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 0.5rem;
}

/* === Cards === */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 1.5rem;
}

.card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
  transition: all var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent);
}

.card-icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(25, 245, 170, 0.1);
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  color: var(--accent);
}

.card-icon svg {
  width: 24px;
  height: 24px;
}

.card h4 {
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.card p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

/* Service Card (smaller grid) */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
  gap: 1.25rem;
}

.service-card {
  padding: 1.5rem;
}

.service-card .card-icon {
  width: 40px;
  height: 40px;
  margin-bottom: 1rem;
}

.service-card .card-icon svg {
  width: 20px;
  height: 20px;
}

/* Team Card */
.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 2rem;
  max-width: 900px;
  margin: 0 auto;
}

.team-card {
  text-align: center;
  padding: 1.5rem;
}

.team-card:hover {
  transform: translateY(-4px);
}

.team-card img {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 1rem;
  border: 3px solid var(--border-color);
  transition: border-color var(--transition);
}

.team-card:hover img {
  border-color: var(--accent);
}

.team-card h4 {
  margin-bottom: 0.25rem;
}

.team-card p {
  font-size: 0.875rem;
  margin-bottom: 0;
}

/* === Partners Section === */
.partners {
  background: var(--bg-secondary);
}

.partners-grid {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 3rem;
}

.partners-grid a {
  opacity: 0.7;
  transition: opacity var(--transition);
  display: block;
}

.partners-grid a:hover {
  opacity: 1;
}

.partners-grid img {
  height: 40px;
  width: auto;
  filter: grayscale(100%) brightness(1.2);
  transition: filter var(--transition);
}

[data-theme="light"] .partners-grid img {
  filter: grayscale(100%) brightness(0.8);
}

.partners-grid a:hover img {
  filter: grayscale(0%) brightness(1);
}

/* === Contact Section === */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 2rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 500;
  margin-bottom: 0.5rem;
  color: var(--text-primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 0.875rem 1rem;
  font-size: 1rem;
  font-family: inherit;
  color: var(--text-primary);
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  transition: all var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(25, 245, 170, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

.contact-form .btn {
  width: 100%;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.info-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 1.5rem;
  display: flex;
  align-items: flex-start;
  gap: 1rem;
}

.info-card-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(25, 245, 170, 0.1);
  border-radius: var(--radius-sm);
  color: var(--accent);
  flex-shrink: 0;
}

.info-card h4 {
  margin-bottom: 0.25rem;
  font-size: 1rem;
}

.info-card p {
  margin-bottom: 0;
  font-size: 0.9375rem;
}

.map-container {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
}

.map-container iframe {
  width: 100%;
  height: 250px;
  display: block;
}

/* === CTA Section === */
.cta {
  background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
  text-align: center;
}

.cta-content {
  max-width: 600px;
  margin: 0 auto;
}

/* === Footer === */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: 2rem 0;
}

.footer-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.footer-logo img {
  height: 1.5rem;
}

[data-theme="light"] .footer-logo img {
  filter: invert(1);
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.footer-links a {
  color: var(--text-secondary);
  font-size: 0.875rem;
  transition: color var(--transition);
}

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

.social-links {
  display: flex;
  gap: 1rem;
}

.social-links a {
  color: var(--text-secondary);
  transition: color var(--transition);
}

.social-links a:hover {
  color: var(--accent);
}

.social-links svg {
  width: 20px;
  height: 20px;
}

/* === 404 Page === */
.error-page {
  min-height: calc(100vh - var(--header-height) - 100px);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}

.error-page h1 {
  font-size: 8rem;
  color: var(--accent);
  line-height: 1;
}

/* === Legal Pages === */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
  padding: 3rem 1.5rem;
}

.legal-content h2 {
  margin-top: 2rem;
  color: var(--text-primary);
}

.legal-content p {
  margin-bottom: 1.5rem;
}

/* === Animations === */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* === Responsive === */
@media (max-width: 992px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  :root {
    --header-height: 64px;
  }

  .nav-links,
  .nav-actions .btn {
    display: none;
  }

  .mobile-toggle {
    display: flex;
  }

  .mobile-menu .nav-actions {
    margin-top: 2rem;
  }

  .mobile-menu .nav-actions .btn {
    display: inline-flex;
  }

  .hero {
    min-height: auto;
    padding: calc(var(--header-height) + 3rem) 0 3rem;
  }

  section {
    padding: 3rem 0;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .partners-grid {
    gap: 2rem;
  }

  .partners-grid img {
    height: 30px;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .card-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }

  .team-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
  }

  .team-card img {
    width: 80px;
    height: 80px;
  }
}