/* ==========================================================================
   VOLT'S LEGACY SOLAR - Master CSS Stylesheet
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  /* Brand Color Palette */
  --primary-900: #071530;
  --primary-800: #0c204c;
  --primary-700: #132f6b;
  --primary-600: #1b4291;
  --primary-500: #2458b8;
  
  --blue-600: #1a56db;
  --blue-500: #2563eb;
  --blue-400: #3b82f6;
  --blue-100: #dbeafe;
  --blue-50: #eff6ff;

  --solar-gold-600: #d97706;
  --solar-gold-500: #f59e0b;
  --solar-gold-400: #fbbf24;
  --solar-gold-300: #fde68a;
  --solar-gold-100: #fef3c7;
  --solar-gold-50: #fffbeb;

  --gray-900: #0f172a;
  --gray-800: #1e293b;
  --gray-700: #334155;
  --gray-600: #475569;
  --gray-500: #64748b;
  --gray-400: #94a3b8;
  --gray-300: #cbd5e1;
  --gray-200: #e2e8f0;
  --gray-100: #f1f5f9;
  --gray-50: #f8fafc;
  --white: #ffffff;

  /* Semantic Variables */
  --bg-primary: #f8fafc;
  --bg-surface: #ffffff;
  --bg-surface-elevated: #ffffff;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #64748b;
  --border-light: #e2e8f0;
  --border-focus: #2563eb;

  /* Typography */
  --font-heading: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 1px 3px 0 rgba(15, 23, 42, 0.08), 0 1px 2px -1px rgba(15, 23, 42, 0.08);
  --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.06);
  --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.2);
  --shadow-glow: 0 0 25px rgba(245, 158, 11, 0.25);
  --shadow-blue-glow: 0 0 25px rgba(37, 99, 235, 0.2);

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);

  /* Layout */
  --max-width: 1280px;
  --header-height: 94px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-main);
  background-color: var(--bg-primary);
  line-height: 1.6;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

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

.container-narrow {
  max-width: 960px;
}

.container-wide {
  max-width: 1400px;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--primary-900);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.02em;
}

.section-header {
  text-align: center;
  margin-bottom: 1.25rem;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  background: var(--blue-50);
  color: var(--blue-600);
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.5rem;
  border: 1px solid rgba(37, 99, 235, 0.15);
}

.section-tag-gold {
  background: var(--solar-gold-50);
  color: var(--solar-gold-600);
  border-color: rgba(245, 158, 11, 0.25);
}

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.75rem);
  color: var(--primary-900);
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.125rem;
  color: var(--text-muted);
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

/* Section Spacing */
.section {
  padding-top: 1.5rem;
  padding-bottom: 1.5rem;
  position: relative;
}

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

.section-dark {
  background: linear-gradient(135deg, var(--primary-900) 0%, var(--primary-800) 100%);
  color: var(--white);
}

.section-dark h1,
.section-dark h2,
.section-dark h3,
.section-dark h4 {
  color: var(--white);
}

.section-dark .section-subtitle {
  color: var(--gray-300);
}

/* Header & Sticky Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.96);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.8);
  height: var(--header-height);
  display: flex;
  align-items: center;
  transition: all var(--transition-base);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.98);
  box-shadow: var(--shadow-md);
  height: 78px;
}

.site-header.scrolled .brand-logo-img {
  height: 58px;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.brand-logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.25rem 0;
  text-decoration: none;
}

.brand-logo-img {
  height: 68px;
  width: auto;
  object-fit: contain;
  transition: all var(--transition-base);
}

.brand-logo-link:hover .brand-logo-img {
  transform: scale(1.03);
}

/* Desktop Navigation */
.nav-desktop {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.nav-links-list {
  display: flex;
  align-items: center;
  list-style: none;
  gap: 0.5rem;
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.65rem 0.9rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--gray-700);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link.active,
.nav-item:hover > .nav-link {
  color: var(--blue-600);
  background-color: var(--blue-50);
}

.nav-chevron {
  width: 14px;
  height: 14px;
  stroke: currentColor;
  transition: transform var(--transition-base);
}

.nav-item:hover .nav-chevron {
  transform: rotate(180deg);
}

/* Header Actions */
.header-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}

/* Global Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.8rem 1.6rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
  text-align: center;
  white-space: nowrap;
  line-height: 1;
}

.btn-primary {
  background: linear-gradient(135deg, var(--blue-600) 0%, var(--primary-700) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(27, 66, 145, 0.3);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-primary:hover {
  background: linear-gradient(135deg, var(--blue-500) 0%, var(--primary-600) 100%);
  box-shadow: 0 6px 20px rgba(27, 66, 145, 0.4);
  transform: translateY(-2px);
  color: var(--white);
}

.btn-solar {
  background: linear-gradient(135deg, var(--solar-gold-500) 0%, var(--solar-gold-600) 100%);
  color: var(--primary-900);
  font-weight: 800;
  box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.btn-solar:hover {
  background: linear-gradient(135deg, var(--solar-gold-400) 0%, var(--solar-gold-500) 100%);
  box-shadow: 0 6px 22px rgba(245, 158, 11, 0.5);
  transform: translateY(-2px);
  color: var(--primary-900);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-800);
  border: 1.5px solid var(--gray-300);
  box-shadow: var(--shadow-xs);
}

.btn-secondary:hover {
  background: var(--gray-50);
  border-color: var(--blue-600);
  color: var(--blue-600);
  transform: translateY(-2px);
}

.btn-outline-white {
  background: rgba(255, 255, 255, 0.12);
  color: var(--white);
  border: 1.5px solid rgba(255, 255, 255, 0.6);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
}

.btn-outline-white:hover {
  background: var(--white);
  color: var(--primary-900);
  border-color: var(--white);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.55rem 1.1rem;
  font-size: 0.875rem;
  border-radius: var(--radius-sm);
}

.btn-lg {
  padding: 1rem 2rem;
  font-size: 1.05rem;
  border-radius: var(--radius-md);
}

/* Animations */
.animate-fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Footer */
.site-footer {
  background: #061126;
  color: var(--gray-300);
  padding-top: 5rem;
  padding-bottom: 2.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr 1.2fr 1.5fr;
  gap: 3rem;
  margin-bottom: 4rem;
}

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.footer-logo-img {
  height: 64px;
  width: auto;
  filter: brightness(0) invert(1);
  object-fit: contain;
}

.footer-desc {
  color: var(--gray-400);
  font-size: 0.95rem;
  line-height: 1.65;
}

.footer-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0.85rem;
  background: rgba(245, 158, 11, 0.12);
  border: 1px solid rgba(245, 158, 11, 0.3);
  color: var(--solar-gold-400);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  width: fit-content;
}

.footer-heading {
  font-family: var(--font-heading);
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.footer-heading::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background: var(--solar-gold-500);
  border-radius: var(--radius-full);
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.footer-links a {
  color: var(--gray-400);
  font-size: 0.925rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  transition: all var(--transition-fast);
}

.footer-links a:hover {
  color: var(--solar-gold-400);
  transform: translateX(4px);
}

.footer-contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-contact-item {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  color: var(--gray-400);
  font-size: 0.9rem;
}

.footer-contact-icon {
  width: 18px;
  height: 18px;
  color: var(--solar-gold-400);
  flex-shrink: 0;
  margin-top: 2px;
}

.footer-contact-icon.icon-blue {
  color: #38bdf8;
}

.footer-contact-icon.icon-white {
  color: #ffffff;
}

.footer-contact-icon.icon-red {
  color: #ef4444;
}

.footer-contact-icon.icon-whatsapp {
  color: #25D366;
}

.footer-contact-item a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-contact-item a:hover {
  color: var(--solar-gold-400);
}

.footer-social-links {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.25rem;
}

.social-icon-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  transition: transform var(--transition-fast);
}

.social-icon-btn:hover {
  transform: translateY(-2px);
}

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

.social-icon-btn.whatsapp {
  background: #25D366;
  color: #ffffff;
}

.social-icon-btn.instagram {
  background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  color: #ffffff;
}

.social-icon-btn.facebook {
  background: #1877F2;
  color: #ffffff;
}

.social-icon-btn.phone {
  background: var(--solar-gold-500);
  color: #071530;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
  color: var(--gray-500);
  font-size: 0.875rem;
}

.footer-bottom-links {
  display: flex;
  gap: 1.5rem;
}

.footer-bottom-links a:hover {
  color: var(--gray-300);
}