/* ==========================================================================
   IKIGAI GLOBAL - PREMIUM CORPORATE SOLAR STYLING SYSTEM
   Design Identity: Enterprise Renewable Energy Developer (Vikram Solar Aesthetic)
   Targeting: Typography Scale, Spacious Layout, Photography-first, Core Web Vitals
   ========================================================================== */

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

/* Design Tokens & Theme Variables */
:root {
  --font-header: 'Outfit', 'Noto Sans Tamil', sans-serif;
  --font-body: 'Plus Jakarta Sans', 'Noto Sans Tamil', sans-serif;

  /* Premium Corporate Palette (Obsidian & Solar Gold) */
  --bg-main: #060A13;         /* Deep obsidian space-black */
  --bg-section-alt: #0B1220;  /* Corporate slate navy */
  --bg-card: #111A2E;         /* Slate panel */
  --bg-card-hover: #17243F;   /* Active slate panel */
  --text-main: #F1F5F9;       /* Highly readable off-white */
  --text-muted: #94A3B8;      /* Clean slate grey */
  --text-dark: #020617;       /* Deepest obsidian */
  
  --color-primary: #EAB308;   /* Solar Gold */
  --color-secondary: #10B981; /* Energy Green */
  --color-accent: #38BDF8;    /* Corporate Sky Blue */
  --color-gold: #EAB308;      /* Solar Gold */
  --color-danger: #EF4444;    /* Danger Red */
  
  --border-corporate: 1px solid rgba(255, 255, 255, 0.08);
  --border-active: 1px solid var(--color-primary);
  --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  --container-max: 1280px;
}

/* Reset & Base Elements */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  font-size: 16px; /* Base 16px */
}

body {
  background-color: var(--bg-main);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 1.125rem; /* 18px body size */
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

:lang(ta) {
  font-family: 'Noto Sans Tamil', sans-serif;
}

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

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

ul, ol {
  list-style-position: inside;
}

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

/* Typography Hierarchy (Vikram Solar Scale) */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-header);
  font-weight: 700;
  color: #FFFFFF;
  letter-spacing: -0.02em;
  line-height: 1.2;
}

h1 {
  font-size: 4.5rem; /* 72px H1 */
  line-height: 1.1;
  letter-spacing: -0.03em;
}

h2 {
  font-size: 3.5rem; /* 56px H2 */
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin-bottom: 1.5rem;
}

h3 {
  font-size: 2.5rem; /* 40px H3 */
  line-height: 1.2;
  margin-bottom: 1.25rem;
}

h4 {
  font-size: 1.75rem; /* 28px H4 */
  line-height: 1.3;
  margin-bottom: 1rem;
}

p {
  margin-bottom: 1.75rem;
  color: var(--text-muted);
}

.gradient-text {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

/* Spacing & Layout Utilities (Enterprise-grade padding) */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 2rem;
}

.max-width-md {
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding: 8rem 0; /* Premium corporate whitespace */
}

.grid {
  display: grid;
  gap: 3rem;
}

.text-center { text-align: center; }
.text-right { text-align: right; }
.text-green { color: var(--color-secondary) !important; }
.text-accent { color: var(--color-primary) !important; }
.flex-center { display: flex; justify-content: center; align-items: center; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2.5rem; }
.mt-5 { margin-top: 4rem; }
.mb-3 { margin-bottom: 1.5rem; }
.p-4 { padding: 2.5rem; }

/* Buttons (Solid Corporate Borders) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.95rem 2.25rem;
  border-radius: 4px; /* Crisp corporate edges */
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition-smooth);
  border: none;
  outline: none;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--text-dark);
}

.btn-primary:hover {
  background-color: #FFFFFF;
  color: var(--text-dark);
  transform: translateY(-2px);
}

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

.btn-secondary:hover {
  background-color: #FFFFFF;
  color: var(--text-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background-color: transparent;
  color: #FFFFFF;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: rgba(234, 179, 8, 0.05);
}

.btn-sm {
  padding: 0.6rem 1.5rem;
  font-size: 0.9rem;
}

/* Header Navigation */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(6, 10, 19, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: var(--border-corporate);
}

.header-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 90px;
}

.logo {
  font-size: 1.6rem;
  font-weight: 800;
  color: #FFFFFF;
  letter-spacing: -0.03em;
}

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

.main-nav {
  display: flex;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 2.5rem;
  list-style: none;
}

.nav-list a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

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

/* Dropdown Menu */
.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.5);
  min-width: 260px;
  padding: 1rem 0;
  opacity: 0;
  visibility: hidden;
  transform: translateY(15px);
  transition: var(--transition-smooth);
  list-style: none;
  z-index: 1001;
}

.dropdown-menu a {
  display: block;
  padding: 0.6rem 2rem;
  font-size: 0.9rem;
  text-transform: none;
  letter-spacing: normal;
}

.dropdown-menu a:hover {
  background-color: var(--bg-card-hover);
  color: var(--color-primary);
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.arrow {
  display: inline-block;
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 4px solid var(--text-muted);
  margin-left: 6px;
  vertical-align: middle;
}

.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.menu-toggle .bar {
  display: block;
  width: 25px;
  height: 3px;
  background-color: #FFFFFF;
  margin: 5px 0;
  transition: var(--transition-smooth);
}

/* Hero Section (Split Editorial Grid) */
.hero-section {
  padding: 10rem 0 8rem 0;
  position: relative;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 5rem;
}

.trust-pill {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-left: 3px solid var(--color-primary);
  background: rgba(234, 179, 8, 0.05);
  color: #FFFFFF;
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  margin-bottom: 2rem;
  letter-spacing: 0.03em;
}

.hero-lead {
  font-size: 1.25rem;
  margin-bottom: 3rem;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 4rem;
}

.hero-stats {
  display: flex;
  gap: 4rem;
  border-top: var(--border-corporate);
  padding-top: 2.5rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
}

.stat-number {
  font-size: 3rem;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-top: 0.5rem;
}

/* Floating Solar Graphic (Subtle & Engineering-focused) */
.solar-graphic {
  position: relative;
  display: flex;
  justify-content: center;
}

.floating-svg {
  width: 100%;
  max-width: 420px;
}

/* Trust Strip */
.trust-strip {
  background-color: var(--bg-section-alt);
  border-top: var(--border-corporate);
  border-bottom: var(--border-corporate);
  padding: 2.5rem 0;
}

.trust-flex {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 2rem;
}

.trust-logo {
  font-weight: 600;
  color: #FFFFFF;
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.trust-divider {
  width: 1px;
  height: 25px;
  background-color: rgba(255, 255, 255, 0.1);
}

/* Section Header Styles */
.section-subtitle {
  color: var(--color-primary);
  text-transform: uppercase;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 0.15em;
  display: block;
  margin-bottom: 1rem;
}

.section-title {
  margin-bottom: 1.5rem;
}

.section-desc {
  max-width: 750px;
  margin: 0 auto 5rem auto;
  font-size: 1.2rem;
  line-height: 1.7;
}

.bg-section-alt { background-color: var(--bg-section-alt); }
.bg-dark-card { background: var(--bg-main); border-top: var(--border-corporate); border-bottom: var(--border-corporate); }
.bg-gradient-dark { background: radial-gradient(circle at top, #0B1220 0%, #060A13 100%); }

/* Alternate Content Block Layouts (Corporate Redesign) */
.alternating-layout {
  display: flex;
  flex-direction: column;
  gap: 8rem;
}

.editorial-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 6rem;
  align-items: center;
}

.editorial-row.reverse {
  direction: rtl;
}

.editorial-row.reverse .editorial-text-pane {
  direction: ltr;
}

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

.editorial-text-pane h3 {
  margin-bottom: 1.5rem;
}

.editorial-text-pane ul {
  list-style: none;
  margin: 2rem 0;
}

.editorial-text-pane li {
  position: relative;
  padding-left: 28px;
  margin-bottom: 1rem;
  color: var(--text-muted);
}

.editorial-text-pane li::before {
  content: '■';
  position: absolute;
  left: 0;
  color: var(--color-primary);
  font-size: 0.85rem;
}

.editorial-image-pane {
  background-color: var(--bg-section-alt);
  border: var(--border-corporate);
  border-radius: 4px;
  overflow: hidden;
  height: 420px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
  position: relative;
}

.image-pane-svg {
  width: 90px;
  height: 90px;
  color: var(--color-primary);
  opacity: 0.35;
}

/* Service Capability Panels */
.services-editorial-grid {
  display: flex;
  flex-direction: column;
  gap: 6rem;
}

.service-cap-card {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
  text-align: left;
}

.service-cap-card.reverse {
  direction: rtl;
}
.service-cap-card.reverse .cap-content {
  direction: ltr;
}

.cap-content h3 {
  font-size: 2.25rem;
}

.cap-image-box {
  height: 380px;
  background-color: var(--bg-card);
  border: var(--border-corporate);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.cap-image-box::before {
  content: '';
  position: absolute;
  top: 15px;
  left: 15px;
  right: 15px;
  bottom: 15px;
  border: 1px dashed rgba(255, 255, 255, 0.05);
}

.cap-link {
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-primary);
  margin-top: 1.5rem;
  display: inline-block;
}

.cap-link:hover {
  color: #FFFFFF;
}

/* Geo-Locations Portal Layout */
.locations-portal-grid {
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
}

.portal-location-card {
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 3rem 2.5rem;
  text-align: left;
  transition: var(--transition-smooth);
}

.portal-location-card:hover {
  border-color: var(--color-primary);
  background-color: var(--bg-card-hover);
  transform: translateY(-5px);
}

.portal-location-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
  border-bottom: 1px solid rgba(255,255,255,0.05);
  padding-bottom: 0.75rem;
}

.portal-location-card .coverage-span {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 1.5rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

/* Engineers E-E-A-T Grid (Corporate Panels) */
.engineers-corporate-grid {
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
}

.engineer-corporate-card {
  background-color: var(--bg-section-alt);
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 3.5rem 2.5rem;
  text-align: left;
}

.engineer-corporate-card h3 {
  font-size: 1.5rem;
  margin-bottom: 0.25rem;
}

.eng-corp-role {
  color: var(--color-primary);
  font-weight: 700;
  font-size: 0.95rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
  margin-bottom: 0.5rem;
}

.eng-corp-cred {
  font-size: 0.85rem;
  color: var(--text-muted);
  display: block;
  margin-bottom: 1.5rem;
}

.eng-corp-bio {
  font-size: 0.95rem;
  line-height: 1.7;
  margin-bottom: 2rem;
}

.corporate-cert-list {
  list-style: none;
  font-size: 0.85rem;
  color: var(--text-main);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
}

.corporate-cert-list li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 0.75rem;
}

.corporate-cert-list li::before {
  content: '■';
  position: absolute;
  left: 0;
  color: var(--color-primary);
}

/* Portfolio & Case Studies Row */
.portfolio-corporate-list {
  display: flex;
  flex-direction: column;
  gap: 4rem;
}

.portfolio-corporate-row {
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  align-items: center;
  overflow: hidden;
  text-align: left;
}

.portfolio-corporate-row.reverse {
  grid-template-columns: 0.8fr 1.2fr;
}

.portfolio-corp-img {
  height: 100%;
  min-height: 380px;
  background: radial-gradient(circle, #17243F 0%, #0B1220 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.portfolio-corp-badge {
  position: absolute;
  top: 25px;
  left: 25px;
  background-color: var(--color-primary);
  color: var(--text-dark);
  padding: 0.35rem 1rem;
  font-weight: 700;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-radius: 2px;
}

.portfolio-corp-details {
  padding: 4rem 3.5rem;
}

.portfolio-corp-details h3 {
  font-size: 1.75rem;
  margin-bottom: 1.25rem;
}

.portfolio-corp-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 1.5rem;
  margin-top: 2rem;
}

/* Testimonials Slide (Premium Blockquote) */
.testimonial-corporate-slide {
  min-width: 100%;
  display: none;
  flex-direction: column;
  align-items: center;
  padding: 3rem 0;
}

.testimonial-corporate-slide.active {
  display: flex;
}

.corporate-blockquote {
  font-family: var(--font-header);
  font-size: 1.85rem;
  font-weight: 400;
  color: #FFFFFF;
  line-height: 1.5;
  margin-bottom: 2.5rem;
  max-width: 900px;
}

.client-name-span {
  font-weight: 700;
  font-size: 1.1rem;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  display: block;
}

/* FAQs Accordion */
.faq-corporate-item {
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  margin-bottom: 1.25rem;
}

.faq-corporate-item.active {
  border-color: var(--color-primary);
}

/* Form Styling (Premium Obsidian Fields) */
.corporate-form-container {
  max-width: 850px;
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 5rem 4rem;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group select {
  background-color: var(--bg-main);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: 4px;
  padding: 1.125rem 1.25rem;
  font-size: 1rem;
}

.form-group input:focus,
.form-group select:focus {
  border-color: var(--color-primary);
}

/* Sidebar & Article Layouts */
.sidebar-layout {
  display: grid;
  grid-template-columns: 2.1fr 0.9fr;
  gap: 5rem;
}

.primary-content {
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  padding-right: 4rem;
}

.sidebar-widget {
  background-color: var(--bg-card);
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 2.5rem;
}

/* Technical Specification Tables */
.article-content table {
  margin: 3rem 0;
}

.article-content th, 
.article-content td {
  border: 1px solid rgba(255,255,255,0.05);
  padding: 1.125rem 1.5rem;
  font-size: 1rem;
}

.article-content th {
  background-color: var(--bg-section-alt);
  font-weight: 700;
  text-transform: uppercase;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
}

/* SGE Answer Summary Card */
.sge-answer-box {
  background: linear-gradient(135deg, rgba(234, 179, 8, 0.08) 0%, rgba(16, 185, 129, 0.02) 100%);
  border-left: 4px solid var(--color-primary);
  border-radius: 4px;
  padding: 2.5rem;
  margin-bottom: 4rem;
  box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

.sge-answer-box h3 {
  font-size: 1.35rem;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.sge-answer-box li {
  font-size: 1.05rem;
  margin-bottom: 0.85rem;
}

/* Interactive Calculator Elements */
.calculator-grid {
  grid-template-columns: 1.1fr 0.9fr;
  gap: 4rem;
}

.calculator-inputs-card {
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 4rem 3.5rem;
}

.calculator-outputs {
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 4rem 3.5rem;
}

.output-card {
  background: rgba(255, 255, 255, 0.01);
  border: var(--border-corporate);
  border-radius: 4px;
  padding: 1.5rem;
}

.output-val {
  font-size: 1.85rem;
  color: var(--color-primary);
}

/* Sticky CTAs bottom bar for Mobile */
.sticky-ctas {
  border-top: 1.5px solid rgba(255,255,255,0.1);
  height: 65px;
}

/* Footer (Enterprise Column Layout) */
.site-footer {
  background-color: #03060C;
  border-top: var(--border-corporate);
  padding: 7rem 0 4rem 0;
  font-family: var(--font-body);
}

.footer-grid {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 4rem;
  margin-bottom: 5rem;
}

.footer-title {
  font-size: 1.75rem;
  font-weight: 800;
}

.footer-subtitle {
  font-size: 1.15rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 2rem;
}

.footer-badges {
  margin-top: 2rem;
}

.footer-badges .badge {
  background-color: rgba(255, 255, 255, 0.02);
  border: var(--border-corporate);
  font-size: 0.75rem;
  padding: 0.35rem 0.75rem;
  border-radius: 2px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  padding-top: 2.5rem;
}

/* Responsive Overrides */
@media (max-width: 992px) {
  h1 { font-size: 3.5rem; }
  h2 { font-size: 2.75rem; }
  h3 { font-size: 2.1rem; }
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 3rem;
  }
  .hero-actions { justify-content: center; }
  .hero-stats { justify-content: center; }
  .editorial-row {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  .editorial-row.reverse {
    direction: ltr;
  }
  .service-cap-card {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .service-cap-card.reverse {
    direction: ltr;
  }
  .portfolio-corporate-row {
    grid-template-columns: 1fr;
  }
  .portfolio-corporate-row.reverse {
    grid-template-columns: 1fr;
  }
  .sidebar-layout {
    grid-template-columns: 1fr;
    gap: 4rem;
  }
  .primary-content {
    border-right: none;
    padding-right: 0;
  }
  .calculator-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 5rem 0;
  }
  h1 { font-size: 2.75rem; }
  h2 { font-size: 2.1rem; }
  .site-header {
    height: 80px;
  }
  .main-nav {
    top: 80px;
  }
}