/* ==========================================================================
   ThinkVertex Unified CSS Design System
   ========================================================================== */

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

:root {
  --font-heading: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Colors */
  --bg-dark: #070B19;
  --bg-dark-secondary: #0D152D;
  --bg-dark-card: #131E3D;
  --bg-light: #F8FAFC;
  --bg-white: #FFFFFF;
  
  --primary-blue: #1D4ED8;
  --electric-blue: #2563EB;
  --accent-cyan: #00F0FF;
  --accent-glow: rgba(0, 240, 255, 0.35);
  
  --text-dark-primary: #0F172A;
  --text-dark-secondary: #475569;
  --text-light-primary: #F8FAFC;
  --text-light-secondary: #94A3B8;
  
  --border-light: #E2E8F0;
  --border-dark: rgba(255, 255, 255, 0.1);
  --border-cyan-glow: rgba(0, 240, 255, 0.4);

  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.12);
  --shadow-glow: 0 0 30px rgba(0, 240, 255, 0.25);

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-white);
  color: var(--text-dark-primary);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 700;
  line-height: 1.2;
  color: inherit;
}

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

ul {
  list-style: none;
}

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

/* Layout Utilities */
.container {
  width: 100%;
  max-width: 1240px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}

.section-padding {
  padding-top: 5rem;
  padding-bottom: 5rem;
}

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

/* Header & Navigation Bar */
.header-nav {
  position: sticky;
  top: 0;
  z-index: 1000;
  background-color: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  transition: var(--transition);
}

.header-nav.dark-header {
  background-color: rgba(7, 11, 25, 0.92);
  border-bottom: 1px solid var(--border-dark);
  color: var(--text-light-primary);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-size: 1.6rem;
  font-weight: 800;
  color: #0F172A;
  letter-spacing: -0.02em;
}

.brand-logo img {
  height: 56px;
  width: auto;
  max-width: 280px;
  object-fit: contain;
  display: block;
}

.header-nav.dark-header .brand-logo {
  color: #FFFFFF;
}

.logo-icon {
  width: 34px;
  height: 34px;
  background: linear-gradient(135deg, var(--electric-blue), var(--accent-cyan));
  clip-path: polygon(50% 0%, 100% 38%, 82% 100%, 18% 100%, 0% 38%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  font-weight: 800;
  font-size: 0.9rem;
  box-shadow: 0 0 15px var(--accent-glow);
}

.logo-text span {
  color: var(--electric-blue);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.8rem;
}

.nav-links a {
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--text-dark-secondary);
  position: relative;
  padding: 0.4rem 0;
}

.header-nav.dark-header .nav-links a {
  color: var(--text-light-secondary);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--electric-blue);
}

.header-nav.dark-header .nav-links a:hover,
.header-nav.dark-header .nav-links a.active {
  color: var(--accent-cyan);
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--electric-blue), var(--accent-cyan));
  border-radius: var(--radius-full);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: inherit;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  padding: 0.85rem 1.8rem;
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: var(--transition);
  border: 1px solid transparent;
}

.btn-primary {
  background: linear-gradient(135deg, #2563EB, #1D4ED8);
  color: #FFFFFF;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(37, 99, 235, 0.45);
}

.btn-cyan {
  background: linear-gradient(135deg, #00F0FF, #00B4D8);
  color: #070B19;
  font-weight: 700;
  box-shadow: 0 4px 15px rgba(0, 240, 255, 0.4);
}

.btn-cyan:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 25px rgba(0, 240, 255, 0.6);
}

.btn-outline-light {
  background: rgba(255, 255, 255, 0.08);
  color: #FFFFFF;
  border-color: rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(8px);
}

.btn-outline-light:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

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

.btn-outline-dark:hover {
  background: var(--bg-light);
  border-color: var(--electric-blue);
  color: var(--electric-blue);
}

/* Common Dark Hero Section */
.hero-dark {
  background: radial-gradient(circle at 70% 30%, #101F42 0%, var(--bg-dark) 70%);
  color: var(--text-light-primary);
  padding-top: 5rem;
  padding-bottom: 6rem;
  position: relative;
  overflow: hidden;
}

.hero-dark::before {
  content: '';
  position: absolute;
  top: -20%;
  right: 10%;
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, var(--accent-glow) 0%, rgba(0,0,0,0) 70%);
  pointer-events: none;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 1.5rem;
  line-height: 1.15;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-light-secondary);
  margin-bottom: 2.5rem;
  max-width: 540px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 1.2rem;
}

.hero-image-wrapper {
  position: relative;
  display: flex;
  justify-content: center;
}

.hero-image-wrapper img {
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), 0 0 40px rgba(0, 240, 255, 0.2);
  border: 1px solid var(--border-cyan-glow);
}

/* Simple Light Page Banner Header */
.page-header-light {
  background-color: var(--bg-light);
  padding: 4rem 0 3rem;
  text-align: center;
  border-bottom: 1px solid var(--border-light);
}

.page-header-light h1 {
  font-size: 2.6rem;
  color: var(--text-dark-primary);
  margin-bottom: 0.8rem;
}

.page-header-light p {
  font-size: 1.1rem;
  color: var(--text-dark-secondary);
  max-width: 650px;
  margin: 0 auto;
}

/* Card Grids */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.card {
  background-color: var(--bg-white);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 2rem;
  transition: var(--transition);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--electric-blue);
}

.card-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.1);
  color: var(--electric-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
}

.card h3 {
  font-size: 1.3rem;
  margin-bottom: 0.8rem;
  color: var(--text-dark-primary);
}

.card p {
  color: var(--text-dark-secondary);
  font-size: 0.95rem;
}

/* Stats Row Component */
.stats-section {
  background-color: var(--bg-white);
  padding: 4rem 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item h3 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--electric-blue);
  margin-bottom: 0.3rem;
  font-family: var(--font-heading);
}

.stat-item p {
  color: var(--text-dark-secondary);
  font-weight: 600;
  font-size: 1rem;
}

/* CTA Banner Section */
.cta-banner-dark {
  background: linear-gradient(135deg, #09132E 0%, #0F204A 100%);
  color: #FFFFFF;
  padding: 5rem 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-banner-dark h2 {
  font-size: 2.5rem;
  margin-bottom: 1.2rem;
}

.cta-banner-dark p {
  font-size: 1.15rem;
  color: var(--text-light-secondary);
  max-width: 680px;
  margin: 0 auto 2.2rem;
}

/* Interactive Tabs & Category Pills */
.filter-pills {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.8rem;
  flex-wrap: wrap;
  margin-bottom: 3rem;
}

.pill-btn {
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-full);
  background-color: var(--bg-light);
  border: 1px solid var(--border-light);
  color: var(--text-dark-secondary);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
}

.pill-btn.active, .pill-btn:hover {
  background-color: var(--electric-blue);
  color: #FFFFFF;
  border-color: var(--electric-blue);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

/* Contact Form */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.4rem;
  color: var(--text-dark-primary);
}

.form-control {
  width: 100%;
  padding: 0.85rem 1.2rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  font-family: var(--font-body);
  font-size: 1rem; /* 16px to prevent iOS Safari auto-zoom */
  background-color: #FAFAFA;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--electric-blue);
  background-color: #FFFFFF;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

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

/* Contact Page Styles */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 4rem;
  align-items: start;
}

.contact-info-col h2 {
  font-size: 2rem;
  color: var(--text-dark-primary);
  margin-bottom: 2rem;
}

.contact-item {
  display: flex;
  gap: 1.2rem;
  margin-bottom: 1.8rem;
  align-items: flex-start;
}

.contact-icon-box {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  background: rgba(37, 99, 235, 0.1);
  color: var(--electric-blue);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  flex-shrink: 0;
}

.contact-item-text h4 {
  font-size: 1.1rem;
  color: var(--text-dark-primary);
  margin-bottom: 0.25rem;
}

.contact-item-text p {
  color: var(--text-dark-secondary);
  word-break: break-word;
}

.contact-form-card {
  background-color: var(--bg-light);
  border: 1px solid var(--border-light);
  padding: 2.5rem;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.contact-form-card h3 {
  font-size: 1.6rem;
  margin-bottom: 1.5rem;
  color: var(--text-dark-primary);
}

.skyline-banner {
  position: relative;
  height: 260px;
  background: url('../assets/city_skyline.jpg') center/cover no-repeat;
}

.skyline-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, rgba(255, 255, 255, 0.92) 0%, rgba(255, 255, 255, 0.3) 40%, rgba(255, 255, 255, 0.96) 100%);
}

.skyline-content {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  padding-bottom: 2rem;
}

/* Footer */
.footer {
  background-color: var(--bg-white);
  color: var(--text-dark-secondary);
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border-light);
}

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

.footer-brand .brand-logo {
  color: var(--text-dark-primary);
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-dark-secondary);
  max-width: 340px;
  font-size: 0.95rem;
}

.footer-links-grid {
  display: flex;
  justify-content: space-between;
}

.footer-col h4 {
  color: var(--text-dark-primary);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1.2rem;
}

.footer-col ul li {
  margin-bottom: 0.7rem;
}

.footer-col ul li a {
  color: var(--text-dark-secondary);
  font-size: 0.9rem;
}

.footer-col ul li a:hover {
  color: var(--electric-blue);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border-light);
  font-size: 0.85rem;
  color: var(--text-dark-secondary);
}

/* Responsive Breakpoints */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
    text-align: center;
  }
  .hero-content p {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-actions {
    justify-content: center;
  }
  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
  }
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .section-padding {
    padding-top: 3.5rem;
    padding-bottom: 3.5rem;
  }
  .page-header-light {
    padding: 3rem 1.25rem 2.25rem;
  }
  .page-header-light h1 {
    font-size: 2.1rem;
  }
  .contact-form-card {
    padding: 2rem 1.5rem;
  }
  .contact-grid {
    gap: 2.5rem;
  }
  .skyline-banner {
    height: 220px;
  }
  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: #FFFFFF;
    flex-direction: column;
    padding: 2rem;
    gap: 1.5rem;
    box-shadow: var(--shadow-lg);
    transform: translateY(-150%);
    transition: var(--transition);
  }
  .header-nav.dark-header .nav-links {
    background-color: var(--bg-dark);
  }
  .nav-links.show {
    transform: translateY(0);
  }
  .nav-toggle {
    display: block;
  }
  .hero-content h1 {
    font-size: 2.4rem;
  }
}

@media (max-width: 576px) {
  .container {
    padding-left: 1.1rem;
    padding-right: 1.1rem;
  }
  .section-padding {
    padding-top: 2.75rem;
    padding-bottom: 2.75rem;
  }
  .page-header-light {
    padding: 2.5rem 1rem 1.75rem;
  }
  .page-header-light h1 {
    font-size: 1.85rem;
  }
  .page-header-light p {
    font-size: 0.95rem;
  }
  .contact-info-col h2 {
    font-size: 1.6rem;
    margin-bottom: 1.5rem;
  }
  .contact-item {
    gap: 1rem;
    margin-bottom: 1.4rem;
  }
  .contact-icon-box {
    width: 42px;
    height: 42px;
    min-width: 42px;
    font-size: 1.15rem;
  }
  .contact-item-text h4 {
    font-size: 1rem;
  }
  .contact-item-text p {
    font-size: 0.92rem;
  }
  .contact-form-card {
    padding: 1.5rem 1.1rem;
    border-radius: var(--radius-md);
  }
  .contact-form-card h3 {
    font-size: 1.35rem;
    margin-bottom: 1.2rem;
  }
  .form-control {
    padding: 0.75rem 1rem;
  }
  .skyline-banner {
    height: 190px;
  }
  .skyline-banner .brand-logo img {
    height: 42px;
  }
  .footer-links-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
  }
}