/* ==========================================
   CSS Variables - Design System
   ========================================== */

:root {
  /* Colors */
  --color-primary: #2563eb;
  --color-secondary: #1e293b;
  --color-accent: #0ea5e9;
  --color-bg-white: #ffffff;
  --color-bg-light: #f8fafc;
  --color-text: #334155;
  --color-text-light: #64748b;
  --color-border: #e2e8f0;

  /* Typography */
  --font-family: 'Alata', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
  --font-size-base: 16px;
  --font-size-small: 0.875rem;
  --font-size-large: 1.125rem;
  --font-size-h1: 2.5rem;
  --font-size-h2: 2rem;
  --font-size-h3: 1.5rem;
  --font-size-h4: 1.25rem;

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

  /* Layout */
  --max-width: 1200px;
  --border-radius: 8px;
  --transition: 0.3s ease;
}

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

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  color: var(--color-text);
  line-height: 1.6;
  background-color: var(--color-bg-white);
}

h1, h2, h3, h4, h5, h6 {
  color: var(--color-secondary);
  font-weight: 700;
  line-height: 1.2;
  margin-top: 0;
}

h1 {
  font-size: var(--font-size-h1);
}

h2 {
  font-size: var(--font-size-h2);
}

h3 {
  font-size: var(--font-size-h3);
}

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

p {
  margin-top: 0;
  margin-bottom: var(--spacing-sm);
}

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

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

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

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

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

.section {
  padding: var(--spacing-2xl) 0;
}

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

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

.header {
  background-color: var(--color-bg-white);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-sm) 0;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
}

.nav-menu {
  display: flex;
  list-style: none;
  margin: 0 0 0 auto;
  padding: 0;
  gap: var(--spacing-lg);
}

.nav-menu a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--border-radius);
  transition: all var(--transition);
}

.nav-menu a:hover,
.nav-menu a.active {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
}

/* Language switcher (LT / EN) - sits after the menu, outside the mobile dropdown */
.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  margin-left: var(--spacing-lg);
  padding: var(--spacing-xs) var(--spacing-sm);
  border: 1px solid var(--color-primary);
  border-radius: var(--border-radius);
  color: var(--color-primary);
  font-weight: 600;
  transition: all var(--transition);
}

.lang-flag {
  width: 21px;
  height: 14px;
  object-fit: cover;
  border-radius: 2px;
  box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.15);
}

.lang-switch:hover {
  background-color: var(--color-primary);
  color: var(--color-bg-white);
}

.mobile-menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-text);
  cursor: pointer;
  padding: var(--spacing-xs);
}

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

.hero {
  background: linear-gradient(135deg, #6366f1 0%, #8b5cf6 33%, #06b6d4 66%, #0ea5e9 100%);
  color: white;
  padding: var(--spacing-2xl) 0;
  text-align: center;
}

.hero h1 {
  color: white;
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
}

.hero p {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: all var(--transition);
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: white;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
  background-color: white;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

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

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-large);
}

/* ==========================================
   Grid System
   ========================================== */

.grid {
  display: grid;
  gap: var(--spacing-lg);
}

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

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

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

/* ==========================================
   Service Cards
   ========================================== */

.service-card {
  background-color: var(--color-bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  transition: all var(--transition);
  text-align: center;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
}

.service-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-md);
  font-size: 3rem;
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.service-icon i {
  font-size: 3rem;
}

.service-card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-secondary);
}

.service-card p {
  color: var(--color-text-light);
  margin-bottom: var(--spacing-md);
}

/* ==========================================
   Service Details (Services Page)
   ========================================== */

.service-detail {
  padding: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
  border-left: 4px solid var(--color-primary);
  background-color: var(--color-bg-white);
  border-radius: var(--border-radius);
}

.service-detail h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.service-detail h3 i {
  margin-right: var(--spacing-xs);
}

.service-detail ul {
  list-style: none;
  padding: 0;
}

.service-detail li {
  padding: var(--spacing-xs) 0;
  padding-left: var(--spacing-md);
  position: relative;
}

.service-detail li::before {
  content: "✓";
  color: var(--color-primary);
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* ==========================================
   Why Choose Us
   ========================================== */

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

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

.feature-item {
  padding: var(--spacing-lg);
}

.feature-item h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

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

.cta-section {
  background-color: var(--color-secondary);
  color: white;
  text-align: center;
  padding: var(--spacing-2xl) 0;
}

.cta-section h2 {
  color: white;
  margin-bottom: var(--spacing-md);
}

.cta-section p {
  font-size: var(--font-size-large);
  margin-bottom: var(--spacing-xl);
}

/* ==========================================
   Forms
   ========================================== */

.form-group {
  margin-bottom: var(--spacing-md);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-xs);
  font-weight: 600;
  color: var(--color-secondary);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid var(--color-border);
  border-radius: var(--border-radius);
  font-family: var(--font-family);
  font-size: var(--font-size-base);
  transition: border-color var(--transition);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.form-error {
  color: #dc2626;
  font-size: var(--font-size-small);
  margin-top: var(--spacing-xs);
  display: none;
}

.form-group.error .form-error {
  display: block;
}

.form-group.error .form-input,
.form-group.error .form-textarea,
.form-group.error .form-select {
  border-color: #dc2626;
}

.form-message {
  padding: var(--spacing-md);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  display: none;
}

.form-message.success {
  background-color: #d1fae5;
  color: #065f46;
  border: 1px solid #10b981;
  display: block;
}

.form-message.error {
  background-color: #fee2e2;
  color: #991b1b;
  border: 1px solid #dc2626;
  display: block;
}

/* ==========================================
   Contact Info
   ========================================== */

.contact-info {
  background-color: var(--color-bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-xl);
}

.contact-info h3 {
  margin-bottom: var(--spacing-md);
}

.contact-item {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.contact-item-icon {
  color: var(--color-primary);
  font-size: 1.25rem;
  flex: 0 0 1.75rem;
  text-align: center;
}

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

.footer {
  background-color: var(--color-secondary);
  color: white;
  padding: var(--spacing-xl) 0;
  text-align: center;
}

.footer p {
  margin: 0;
  opacity: 0.8;
}

.footer a {
  color: white;
  text-decoration: underline;
}

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

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

.page-header {
  background-color: var(--color-bg-light);
  padding: var(--spacing-2xl) 0;
  text-align: center;
  margin-bottom: var(--spacing-2xl);
}

.page-header h1 {
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  font-size: var(--font-size-large);
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto;
}

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

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

.mt-1 { margin-top: var(--spacing-sm); }
.mt-2 { margin-top: var(--spacing-md); }
.mt-3 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-sm); }
.mb-2 { margin-bottom: var(--spacing-md); }
.mb-3 { margin-bottom: var(--spacing-lg); }

/* ==========================================
   Scroll to Top Button
   ========================================== */

#scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  background-color: var(--color-primary);
  color: white;
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: none;
  cursor: pointer;
  font-size: 1.5rem;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  transition: all var(--transition);
  z-index: 999;
}

#scroll-top:hover {
  background-color: var(--color-accent);
  transform: translateY(-3px);
}

#scroll-top.visible {
  display: flex;
}

/* ==========================================
   Loading State
   ========================================== */

.btn.loading {
  opacity: 0.7;
  cursor: not-allowed;
  pointer-events: none;
}

.btn.loading::after {
  content: "...";
  animation: dots 1.5s steps(4, end) infinite;
}

@keyframes dots {
  0%, 20% { content: ""; }
  40% { content: "."; }
  60% { content: ".."; }
  80%, 100% { content: "..."; }
}