/* ConsultX Website - Main Stylesheet */

/* Import Montserrat font */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@300;400;500;600;700&display=swap');

/* CSS Variables - Color Palette based on ConsultX Logo */
:root {
  /* Primary Colors from Logo */
  --navy-blue: #2c3e50;
  --deep-green: #27ae60;
  --soft-grey: #ecf0f1;
  --white: #ffffff;
  
  /* Extended Palette */
  --dark-navy: #1a252f;
  --light-navy: #34495e;
  --accent-green: #2ecc71;
  --light-green: #a8e6cf;
  --text-dark: #2c3e50;
  --text-light: #7f8c8d;
  --border-light: #bdc3c7;
  
  /* Typography */
  --font-primary: 'Montserrat', sans-serif;
  --font-weight-light: 300;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;
  
  /* Spacing */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --spacing-xxl: 4rem;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(44, 62, 80, 0.1);
  --shadow-md: 0 4px 8px rgba(44, 62, 80, 0.15);
  --shadow-lg: 0 8px 16px rgba(44, 62, 80, 0.2);
}

/* Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--text-dark);
  background-color: var(--white);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.2;
  margin-bottom: var(--spacing-sm);
}

h1 {
  font-size: 2.5rem;
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.5rem;
}

h4 {
  font-size: 1.25rem;
}

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

a {
  color: var(--deep-green);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

/* Layout Components */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

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

.section-alt {
  background-color: var(--soft-grey);
}

/* Header */
.header {
  background-color: var(--white);
  box-shadow: var(--shadow-sm);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
}

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

.logo {
  height: 40px;
  width: auto;
}

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

.nav-link {
  font-weight: var(--font-weight-medium);
  color: var(--text-dark);
  transition: color 0.3s ease;
}

.nav-link:hover {
  color: var(--deep-green);
}

.language-toggle {
  background: var(--deep-green);
  color: var(--white);
  border: none;
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: var(--font-weight-medium);
  cursor: pointer;
  transition: background-color 0.3s ease;
}

.language-toggle:hover {
  background-color: var(--accent-green);
}

/* Hero Section */
.hero {
  background: linear-gradient(135deg, var(--navy-blue) 0%, var(--light-navy) 100%);
  color: var(--white);
  padding: calc(80px + var(--spacing-xxl)) 0 var(--spacing-xxl);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('../assets/images/hero-consulting.jpg') center/cover;
  opacity: 0.2;
  z-index: 1;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 800px;
  margin: 0 auto;
}

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

.hero p {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-lg);
  color: rgba(255, 255, 255, 0.9);
}

/* Buttons */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  text-align: center;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--accent-green);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

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

/* Cards */
.card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.service-card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
  border-left: 4px solid var(--deep-green);
}

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

.service-icon {
  width: 60px;
  height: 60px;
  background-color: var(--light-green);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--spacing-sm);
  font-size: 1.5rem;
  color: var(--deep-green);
}

/* Contact Form */
.contact-form {
  background-color: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

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

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

.form-input,
.form-textarea {
  width: 100%;
  padding: var(--spacing-sm);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-sm);
  font-family: var(--font-primary);
  transition: border-color 0.3s ease;
}

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

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background-color: var(--navy-blue);
  color: var(--white);
  padding: var(--spacing-xl) 0 var(--spacing-lg);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-section h3 {
  color: var(--white);
  margin-bottom: var(--spacing-sm);
}

.footer-section p,
.footer-section a {
  color: rgba(255, 255, 255, 0.8);
}

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

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-lg);
  border-top: 1px solid var(--light-navy);
  color: rgba(255, 255, 255, 0.6);
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .card-grid,
  .services-grid {
    grid-template-columns: 1fr;
  }
  
  .container {
    padding: 0 var(--spacing-sm);
  }
}

/* Language Toggle Functionality */
[data-lang="vi"] .lang-en {
  display: none;
}

[data-lang="en"] .lang-vi {
  display: none;
}

/* Utility Classes */
.text-center {
  text-align: center;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.hidden {
  display: none;
}

.visible {
  display: block;
}