/* =====================================================
   MODERN BASE STYLES - SG ENERGY 2026
   Professional UI/UX Pro Max Design System
===================================================== */

/* ===================== CSS VARIABLES ===================== */
:root {
  /* Primary Colors */
  --primary-color: #1565c0;
  --primary-dark: #0d47a1;
  --primary-light: #42a5f5;
  --primary-lighter: #90caf9;
  
  /* Secondary Colors */
  --secondary-color: #00acc1;
  --secondary-dark: #00838f;
  --secondary-light: #26c6da;
  
  /* Accent Colors */
  --accent-color: #ffa726;
  --accent-dark: #f57c00;
  --success-color: #66bb6a;
  --error-color: #ef5350;
  --warning-color: #ffca28;
  --info-color: #29b6f6;
  
  /* Neutral Colors */
  --dark-bg: #1a1a2e;
  --dark-alt: #2c2c4a;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  
  /* Text Colors */
  --text-dark: #212121;
  --text-medium: #424242;
  --text-light: #757575;
  --text-lighter: #9e9e9e;
  --text-white: #ffffff;
  
  /* Background Colors */
  --bg-white: #ffffff;
  --bg-light: #f8f9fa;
  --bg-lighter: #fafbfc;
  --bg-dark: #1a1a2e;
  
  /* Border Colors */
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  --border-dark: #d1d5db;
  
  /* Shadows */
  --shadow-xs: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
  --shadow-lg: 0 8px 32px rgba(0,0,0,0.15);
  --shadow-xl: 0 12px 48px rgba(0,0,0,0.18);
  --shadow-2xl: 0 16px 64px rgba(0,0,0,0.22);
  
  /* Gradients */
  --gradient-primary: linear-gradient(135deg, #1565c0 0%, #0d47a1 100%);
  --gradient-secondary: linear-gradient(135deg, #42a5f5 0%, #00acc1 100%);
  --gradient-accent: linear-gradient(135deg, #ffa726 0%, #ff6f00 100%);
  --gradient-dark: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
  --gradient-overlay: linear-gradient(135deg, rgba(0, 30, 60, 0.75) 0%, rgba(21, 101, 192, 0.55) 100%);
  
  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;
  --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.68, -0.55, 0.265, 1.55);
  
  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  --radius-full: 9999px;
  
  /* Typography */
  --font-sans: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', Arial, sans-serif;
  --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
  
  /* Z-Index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal-backdrop: 1040;
  --z-modal: 1050;
  --z-popover: 1060;
  --z-tooltip: 1070;
}

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

html { 
  scroll-behavior: smooth; 
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body { 
  font-family: var(--font-sans);
  color: var(--text-dark); 
  font-size: 15px;
  line-height: 1.6;
  overflow-x: hidden;
  background: var(--bg-white);
}

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

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

ul, ol { 
  list-style: none; 
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  padding: 0;
}

input, textarea, select {
  font-family: inherit;
  font-size: inherit;
}
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
}

/* ===================== UTILITY CLASSES ===================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.container-fluid {
  width: 100%;
  padding: 0 20px;
}

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

.d-flex { display: flex; }
.d-inline-flex { display: inline-flex; }
.d-grid { display: grid; }
.d-none { display: none; }
.d-block { display: block; }

.align-items-center { align-items: center; }
.align-items-start { align-items: flex-start; }
.align-items-end { align-items: flex-end; }
.justify-content-center { justify-content: center; }
.justify-content-between { justify-content: space-between; }
.justify-content-around { justify-content: space-around; }

.flex-column { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.gap-1 { gap: var(--spacing-xs); }
.gap-2 { gap: var(--spacing-sm); }
.gap-3 { gap: var(--spacing-md); }
.gap-4 { gap: var(--spacing-lg); }
.gap-5 { gap: var(--spacing-xl); }

.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); }
.mt-5 { margin-top: var(--spacing-xl); }

.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); }
.mb-5 { margin-bottom: var(--spacing-xl); }

/* ===================== COMMON COMPONENTS ===================== */

/* Badges */
.badge, .section-badge, .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 1px;
  background: var(--gradient-secondary);
  color: var(--text-white);
  box-shadow: var(--shadow-sm);
  animation: fadeIn 0.5s ease;
}

.section-badge {
  background: linear-gradient(135deg, rgba(66, 165, 245, 0.1) 0%, rgba(0, 172, 193, 0.15) 100%);
  color: var(--primary-color);
  border: 2px solid rgba(21, 101, 192, 0.2);
  font-size: 11px;
  font-weight: 800;
  margin-bottom: 10px;
}

/* Buttons */
.btn-primary,
.btn-secondary,
.btn-outline-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: 14px 32px;
  border-radius: var(--radius-full);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: all var(--transition-smooth);
  cursor: pointer;
  border: 2px solid transparent;
  text-transform: uppercase;
  position: relative;
  overflow: hidden;
  z-index: 1;
}

.btn-primary {
  background: var(--gradient-primary);
  color: var(--text-white);
  box-shadow: 0 4px 16px rgba(21, 101, 192, 0.3);
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,0.2) 0%, transparent 100%);
  opacity: 0;
  transition: opacity var(--transition-smooth);
  z-index: -1;
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 24px rgba(21, 101, 192, 0.4);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-secondary {
  background: var(--gray-100);
  color: var(--text-dark);
  border-color: var(--border-color);
}

.btn-secondary:hover {
  background: var(--primary-color);
  color: var(--text-white);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

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

.btn-outline-primary:hover {
  background: var(--primary-color);
  color: var(--text-white);
  box-shadow: var(--shadow-md);
}

.btn-icon {
  gap: 12px;
}

.btn-icon i {
  font-size: 14px;
  transition: transform var(--transition-smooth);
}

.btn-icon:hover i {
  transform: translateX(4px);
}

.btn-large {
  padding: 16px 40px;
  font-size: 16px;
}

/* Section Headers */
.section-header,
.section-head {
  text-align: center;
  margin-bottom: var(--spacing-3xl);
}

.section-title {
  font-size: 36px;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  line-height: 1.2;
  color: var(--text-dark);
}

.section-title .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  display: inline-block;
}

.section-subtitle,
.section-description {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-light);
  max-width: 700px;
  margin: 0 auto;
}

.section-head__kicker {
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--primary-color);
  margin-bottom: var(--spacing-md);
}

.section-head__title {
  font-size: 38px;
  font-weight: 900;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
}

.section-head__desc {
  font-size: 17px;
  color: var(--text-light);
  line-height: 1.7;
  max-width: 650px;
  margin: 0 auto;
}

/* Pagination */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-3xl);
}

.page-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 42px;
  height: 42px;
  padding: 0 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark);
  background: var(--bg-white);
  border: 2px solid var(--border-color);
  transition: all var(--transition-smooth);
  gap: var(--spacing-sm);
}

.page-btn:hover {
  background: var(--primary-color);
  color: var(--text-white);
  border-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

.page-btn.is-active {
  background: var(--primary-color);
  color: var(--text-white);
  border-color: var(--primary-color);
  box-shadow: var(--shadow-md);
}

.page-dots {
  color: var(--text-lighter);
  padding: 0 var(--spacing-sm);
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from { 
    opacity: 0; 
    transform: translateY(30px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes fadeDown {
  from { 
    opacity: 0; 
    transform: translateY(-30px); 
  }
  to { 
    opacity: 1; 
    transform: translateY(0); 
  }
}

@keyframes slideInLeft {
  from { 
    opacity: 0; 
    transform: translateX(-50px); 
  }
  to { 
    opacity: 1; 
    transform: translateX(0); 
  }
}

@keyframes slideInRight {
  from { 
    opacity: 0; 
    transform: translateX(50px); 
  }
  to { 
    opacity: 1; 
    transform: translateX(0); 
  }
}

@keyframes zoomIn {
  from { 
    opacity: 0; 
    transform: scale(0.9); 
  }
  to { 
    opacity: 1; 
    transform: scale(1); 
  }
}

@keyframes pulse {
  0%, 100% { 
    transform: scale(1); 
  }
  50% { 
    transform: scale(1.05); 
  }
}

/* AOS (Animate On Scroll) Support */
[data-aos] {
  opacity: 0;
  transition-property: transform, opacity;
}

[data-aos].aos-animate {
  opacity: 1;
}

[data-aos="fade"] {
  opacity: 0;
  transition-property: opacity;
}

[data-aos="fade"].aos-animate {
  opacity: 1;
}

[data-aos="fade-up"] {
  transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
  transform: translateY(0);
}

[data-aos="fade-down"] {
  transform: translateY(-30px);
}

[data-aos="fade-down"].aos-animate {
  transform: translateY(0);
}

[data-aos="fade-left"] {
  transform: translateX(-30px);
}

[data-aos="fade-left"].aos-animate {
  transform: translateX(0);
}

[data-aos="fade-right"] {
  transform: translateX(30px);
}

[data-aos="fade-right"].aos-animate {
  transform: translateX(0);
}

[data-aos="zoom-in"] {
  transform: scale(0.95);
}

[data-aos="zoom-in"].aos-animate {
  transform: scale(1);
}

/* Loading Spinner */
.spinner {
  display: inline-block;
  width: 40px;
  height: 40px;
  border: 4px solid var(--gray-200);
  border-top-color: var(--primary-color);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Overlay */
.overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 1;
}

/* Blue Line Decoration */
.blue-line {
  width: 60px;
  height: 4px;
  background: var(--gradient-primary);
  border-radius: 2px;
  margin-bottom: var(--spacing-lg);
}