/* ============================================
   Celebi Labs - Style System
   ============================================ */

/* CSS Custom Properties */
:root {
  /* Colors */
  --bg-primary: #FAFAFA;
  --bg-secondary: #FFFFFF;
  --text-primary: #1A1A1A;
  --text-secondary: #6B7280;
  --accent: #1E40AF;
  --accent-hover: #1E3A8A;
  --accent-light: rgba(30, 64, 175, 0.1);
  --border: #E5E7EB;
  --success: #10B981;

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --font-size-base: 1rem;
  --font-size-sm: 0.875rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 2rem;
  --font-size-4xl: 2.5rem;
  --font-size-5xl: 3.5rem;

  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-2xl: 4rem;
  --spacing-3xl: 6rem;

  /* Layout */
  --container-max: 1120px;
  --border-radius: 8px;
  --border-radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

/* Dark Mode */
[data-theme="dark"] {
  --bg-primary: #0F0F0F;
  --bg-secondary: #1A1A1A;
  --text-primary: #FAFAFA;
  --text-secondary: #9CA3AF;
  --border: #2D2D2D;
  --accent-light: rgba(30, 64, 175, 0.2);
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.3);
}

/* ============================================
   Base Styles
   ============================================ */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-primary);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

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

ul {
  list-style: none;
}

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

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

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

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

/* ============================================
   Components - Buttons
   ============================================ */

.btn {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: var(--font-size-sm);
  font-weight: 500;
  border-radius: var(--border-radius);
  transition: all 0.2s ease;
  cursor: pointer;
  border: none;
  text-align: center;
}

.btn-lg {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
}

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

.btn-primary:hover {
  background-color: var(--accent-hover);
  color: #FFFFFF;
  transform: translateY(-1px);
}

.btn-secondary {
  background-color: transparent;
  color: var(--accent);
  border: 1px solid var(--accent);
}

.btn-secondary:hover {
  background-color: var(--accent);
  color: #FFFFFF;
}

/* ============================================
   Components - Tags
   ============================================ */

.tag {
  display: inline-block;
  padding: 0.25rem 0.75rem;
  font-size: var(--font-size-sm);
  font-weight: 500;
  color: var(--accent);
  background-color: var(--accent-light);
  border-radius: 100px;
}

/* ============================================
   Header
   ============================================ */

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: var(--font-size-xl);
  font-weight: 700;
  color: var(--text-primary);
}

.logo:hover {
  color: var(--text-primary);
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--text-primary);
}

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

.hero {
  padding: calc(64px + var(--spacing-3xl)) 0 var(--spacing-3xl);
  text-align: center;
  background-color: var(--bg-secondary);
}

.hero-title {
  font-size: var(--font-size-4xl);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
  color: var(--text-primary);
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--text-secondary);
  max-width: 540px;
  margin: 0 auto var(--spacing-lg);
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-2xl);
}

/* Trust Indicators */
.trust-indicators {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: var(--spacing-xl);
  padding-top: var(--spacing-xl);
  border-top: 1px solid var(--border);
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.25rem;
}

.trust-number {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--accent);
}

.trust-label {
  font-size: var(--font-size-sm);
  color: var(--text-secondary);
}

/* ============================================
   Section Styles
   ============================================ */

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

.section-header {
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.section-title {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

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

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

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

.services-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-lg);
}

.service-card {
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-icon {
  width: 64px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--accent-light);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
}

.service-icon img {
  width: 32px;
  height: 32px;
  object-fit: contain;
}

.service-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.service-desc {
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: var(--spacing-sm);
}

.service-features {
  padding-top: var(--spacing-sm);
  border-top: 1px solid var(--border);
}

.service-features li {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  padding: 0.35rem 0;
  padding-left: var(--spacing-sm);
  position: relative;
}

.service-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--accent);
}

/* ============================================
   Work Section
   ============================================ */

.work {
  background-color: var(--bg-secondary);
}

.project-card {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
  background-color: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
  overflow: hidden;
}

.project-image {
  background: linear-gradient(135deg, var(--accent-light), var(--bg-secondary));
  aspect-ratio: 16 / 9;
  display: flex;
  align-items: center;
  justify-content: center;
}

.project-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--font-size-2xl);
  font-weight: 600;
  color: var(--accent);
}

.project-placeholder-icon {
  font-size: 3rem;
}

.project-info {
  padding: var(--spacing-lg);
}

.project-tags {
  display: flex;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-sm);
}

.project-title {
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.project-desc {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-md);
  line-height: 1.7;
}

.project-highlights {
  margin-bottom: var(--spacing-md);
}

.project-highlights li {
  color: var(--success);
  font-size: var(--font-size-sm);
  font-weight: 500;
  padding: 0.25rem 0;
}

.project-link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.work-note {
  text-align: center;
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xl);
  font-style: italic;
}

/* ============================================
   Process Section
   ============================================ */

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

.process-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-lg);
}

.process-step {
  position: relative;
  padding: var(--spacing-lg);
  background-color: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--border-radius-lg);
}

.process-number {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  color: var(--accent-light);
  margin-bottom: var(--spacing-sm);
}

[data-theme="dark"] .process-number {
  color: var(--accent);
  opacity: 0.3;
}

.process-step .process-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
  color: var(--text-primary);
}

.process-desc {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  line-height: 1.7;
}

/* ============================================
   Approach Section
   ============================================ */

.approach {
  background-color: var(--bg-secondary);
  text-align: center;
}

.approach-quote {
  font-size: var(--font-size-2xl);
  font-weight: 600;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: var(--spacing-xl);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  border: none;
  padding: 0;
}

.approach-list {
  display: inline-block;
  text-align: left;
  max-width: 500px;
}

.approach-list li {
  color: var(--text-secondary);
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--border);
}

.approach-list li:last-child {
  border-bottom: none;
}

.approach-list strong {
  color: var(--text-primary);
}

.approach-list span {
  color: var(--text-secondary);
}

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

.contact {
  background-color: var(--bg-primary);
  text-align: center;
}

.contact-content {
  max-width: 500px;
  margin: 0 auto;
}

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

.contact-subtitle {
  color: var(--text-secondary);
  margin-bottom: var(--spacing-lg);
}

.contact-email {
  display: inline-block;
  font-size: var(--font-size-xl);
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  background-color: var(--accent-light);
  border-radius: var(--border-radius);
  transition: background-color 0.2s ease;
}

.contact-email:hover {
  background-color: var(--accent);
  color: #FFFFFF;
}

.contact-location {
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-xs);
}

.location-icon {
  font-size: var(--font-size-lg);
}

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

.footer {
  padding: var(--spacing-lg) 0;
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border);
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  text-align: center;
}

.footer-copyright {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
}

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

.footer-links a {
  color: var(--text-secondary);
  font-size: var(--font-size-sm);
  transition: color 0.2s ease;
}

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

/* ============================================
   Responsive Design
   ============================================ */

@media (min-width: 640px) {
  .hero-title {
    font-size: var(--font-size-5xl);
  }

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

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

  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

@media (min-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .process-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .project-card {
    flex-direction: row;
  }

  .project-image {
    flex: 1;
    aspect-ratio: auto;
    min-height: 300px;
  }

  .project-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
  }
}