/* ============================================================
   T E C H H O L D   —   A B O U T   P A G E   S T Y L E S
   ============================================================ */

/* ---------- RESET & GLOBAL ---------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  html {
    scroll-behavior: smooth;
  }
  
  body {
    font-family: 'Inter', sans-serif;
    background-color: #f9fbfe;
    color: #1e293b;
    line-height: 1.6;
    overflow-x: hidden;
  }
  
  :root {
    --primary: #0f3b7a;
    --primary-light: #1e4f96;
    --accent: #00c9b7;
    --accent-glow: #00e0cb;
    --dark-bg: #0b1e33;
    --dark-bg-alt: #0f2744;
    --light-bg: #ffffff;
    --light-bg-alt: #f1f6fc;
    --text-dark: #0b1e33;
    --text-muted: #475569;
    --shadow-sm: 0 12px 30px -12px rgba(0, 20, 30, 0.12);
    --shadow-md: 0 25px 40px -18px rgba(0, 30, 60, 0.2);
    --radius: 28px;
    --radius-sm: 18px;
  }
  
  .container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 28px;
  }
  
  /* ---------- SECTION ALTERNATION (DARK / LIGHT) ---------- */
  .section-dark {
    background-color: var(--dark-bg);
    color: #e2e8f0;
  }
  
  .section-light {
    background-color: var(--light-bg-alt);
    color: var(--text-dark);
  }
  
  .section-dark h2 {
    color: #ffffff;
  }
  
  .section-dark .section-header p {
    color: #94a3b8;
  }
  
  .section-light h2 {
    color: var(--primary);
  }
  
  .section-light .section-header p {
    color: var(--text-muted);
  }
  
  /* ---------- TYPOGRAPHY & BUTTONS ---------- */
  h1, h2, h3 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
  }
  
  h2 {
    font-size: 2.6rem;
    margin-bottom: 1rem;
  }
  
  .section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 3.5rem auto;
  }
  
  .section-header p {
    font-size: 1.2rem;
  }
  
  .btn {
    display: inline-block;
    padding: 16px 36px;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1.05rem;
    text-decoration: none;
    transition: all 0.25s ease;
    cursor: pointer;
    border: none;
    letter-spacing: 0.01em;
  }
  
  .btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: white;
    box-shadow: 0 12px 24px -8px rgba(15, 59, 122, 0.4);
  }
  .btn-primary:hover {
    background: linear-gradient(135deg, #0c2f60 0%, #164282 100%);
    transform: translateY(-3px);
    box-shadow: 0 20px 32px -10px rgba(15, 59, 122, 0.5);
  }
  
  .btn-accent {
    background: var(--accent);
    color: var(--dark-bg);
    box-shadow: 0 10px 20px -8px rgba(0, 201, 183, 0.5);
  }
  .btn-accent:hover {
    background: var(--accent-glow);
    transform: translateY(-3px);
    box-shadow: 0 18px 30px -8px rgba(0, 224, 203, 0.6);
  }
  
  .btn-outline-light {
    background: transparent;
    border: 2px solid rgba(255, 255, 255, 0.35);
    color: white;
  }
  .btn-outline-light:hover {
    border-color: white;
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-2px);
  }
  
  /* ---------- HEADER / NAV ---------- */
  header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 999;
    padding: 16px 0;
    transition: background 0.3s ease, backdrop-filter 0.3s ease;
    background: rgba(10, 25, 45, 0.6);
    backdrop-filter: blur(8px);
  }
  
  header.scrolled {
    background: rgba(10, 25, 45, 0.95);
    backdrop-filter: blur(12px);
    padding: 10px 0;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
  }
  
  .nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
  }
  
  .logo {
    font-size: 1.8rem;
    font-weight: 800;
    color: white;
    letter-spacing: -0.03em;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
  }
  .logo i {
    color: var(--accent);
    font-size: 2rem;
  }
  .logo span {
    color: white;
  }
  .logo .tech {
    color: var(--accent);
  }
  
  nav ul {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
  }
  
  nav a {
    color: rgba(255, 255, 255, 0.85);
    text-decoration: none;
    font-weight: 500;
    font-size: 1rem;
    transition: color 0.2s;
  }
  nav a:hover,
  nav a.active {
    color: var(--accent);
  }
  
  .nav-btn {
    background: var(--accent);
    color: var(--dark-bg) !important;
    padding: 10px 24px;
    border-radius: 40px;
    font-weight: 600;
  }
  .nav-btn:hover {
    background: var(--accent-glow);
  }
  
  .menu-toggle {
    display: none;
    font-size: 1.8rem;
    color: white;
    background: none;
    border: none;
    cursor: pointer;
  }
  
  /* ---------- PAGE HERO (DARK) ---------- */
  .page-hero {
    padding: 180px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
    background: radial-gradient(circle at 80% 20%, #1a3e6e, var(--dark-bg) 80%);
  }
  
  .page-hero::before {
    content: '';
    position: absolute;
    top: -20%;
    right: -10%;
    width: 700px;
    height: 700px;
    background: radial-gradient(circle, rgba(0, 201, 183, 0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  .page-hero::after {
    content: '';
    position: absolute;
    bottom: -10%;
    left: -5%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(15, 59, 122, 0.3) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
  }
  
  .page-hero .container {
    position: relative;
    z-index: 2;
  }
  
  .hero-badge {
    display: inline-block;
    background: rgba(0, 201, 183, 0.18);
    color: var(--accent);
    border: 1px solid rgba(0, 201, 183, 0.4);
    padding: 8px 20px;
    border-radius: 60px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 24px;
    backdrop-filter: blur(2px);
  }
  .hero-badge i {
    margin-right: 8px;
  }
  
  .page-hero h1 {
    font-size: 3.8rem;
    color: white;
    margin-bottom: 20px;
    letter-spacing: -0.03em;
  }
  
  .page-hero p {
    font-size: 1.25rem;
    color: rgba(255, 255, 255, 0.8);
    max-width: 700px;
    margin: 0 auto;
  }
  
  /* ---------- COMPANY INTRO (LIGHT) ---------- */
  .company-intro {
    padding: 100px 0;
  }
  
  .intro-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 60px;
    align-items: start;
  }
  
  .intro-content p {
    margin-bottom: 20px;
    color: var(--text-muted);
    font-size: 1.05rem;
  }
  
  .intro-content .btn {
    margin-top: 16px;
  }
  .intro-content .btn i {
    margin-left: 8px;
  }
  
  .intro-visual {
    background: var(--light-bg);
    border-radius: var(--radius);
    padding: 40px 32px;
    box-shadow: var(--shadow-sm);
  }
  
  .stat-block {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  
  .stat-block .stat-item {
    text-align: center;
  }
  
  .stat-block .stat-item h3 {
    font-size: 2.4rem;
    color: var(--primary);
    font-weight: 800;
    margin-bottom: 6px;
  }
  
  .stat-block .stat-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
  }
  
  /* ---------- OUR STORY (DARK) ---------- */
  .our-story {
    padding: 100px 0;
  }
  
  .story-timeline {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 32px;
  }
  
  .story-step {
    display: flex;
    gap: 20px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 32px 28px;
    transition: transform 0.25s, background 0.25s;
  }
  
  .story-step:hover {
    transform: translateY(-4px);
    background: rgba(255, 255, 255, 0.08);
  }
  
  .story-icon {
    flex-shrink: 0;
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0, 201, 183, 0.15);
    border-radius: 16px;
    font-size: 1.6rem;
    color: var(--accent);
  }
  
  .story-content h3 {
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 10px;
  }
  
  .story-content p {
    color: #cbd5e1;
    font-size: 0.95rem;
    line-height: 1.7;
  }
  
  /* ---------- MISSION & VISION (LIGHT) ---------- */
  .mission-vision {
    padding: 100px 0;
  }
  
  .mv-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
  }
  
  .mv-card {
    background: var(--light-bg);
    border-radius: var(--radius);
    padding: 48px 40px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s;
    position: relative;
    overflow: hidden;
  }
  
  .mv-card:hover {
    transform: translateY(-6px);
  }
  
  .mv-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 6px;
  }
  
  .mv-card.mission::before {
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
  }
  
  .mv-card.vision::before {
    background: linear-gradient(90deg, var(--accent), var(--accent-glow));
  }
  
  .mv-icon {
    font-size: 2.4rem;
    color: var(--accent);
    margin-bottom: 20px;
  }
  
  .mv-card h2 {
    font-size: 2rem;
    margin-bottom: 16px;
    color: var(--primary);
  }
  
  .mv-card p {
    color: var(--text-muted);
    font-size: 1.05rem;
    line-height: 1.7;
  }
  
  .mv-detail {
    margin-top: 16px;
    font-size: 0.95rem !important;
    color: var(--text-muted);
    opacity: 0.85;
  }
  
  /* ---------- CORE VALUES (DARK) ---------- */
  .core-values {
    padding: 100px 0;
  }
  
  .values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 28px;
  }
  
  .value-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 36px 28px;
    text-align: center;
    transition: transform 0.25s, background 0.25s, border-color 0.25s;
  }
  
  .value-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(0, 201, 183, 0.3);
  }
  
  .value-card i {
    font-size: 2.2rem;
    color: var(--accent);
    margin-bottom: 18px;
  }
  
  .value-card h3 {
    font-size: 1.3rem;
    color: #ffffff;
    margin-bottom: 12px;
  }
  
  .value-card p {
    color: #94a3b8;
    font-size: 0.95rem;
    line-height: 1.7;
  }
  
  /* ---------- DIFFERENT (LIGHT) ---------- */
  .different {
    padding: 100px 0;
  }
  
  .different-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 28px;
  }
  
  .different-card {
    background: var(--light-bg);
    border-radius: var(--radius-sm);
    padding: 36px 28px;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s, box-shadow 0.25s;
  }
  
  .different-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-md);
  }
  
  .different-card i {
    font-size: 2.2rem;
    color: var(--accent);
    margin-bottom: 18px;
  }
  
  .different-card h3 {
    font-size: 1.3rem;
    color: var(--primary);
    margin-bottom: 12px;
  }
  
  .different-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.7;
  }
  
  /* ---------- EXPERTISE (DARK) ---------- */
  .expertise {
    padding: 100px 0;
  }
  
  .expertise-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
  }
  
  .expertise-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius-sm);
    padding: 32px 24px;
    text-decoration: none;
    transition: transform 0.25s, background 0.25s, border-color 0.25s;
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  
  .expertise-card:hover {
    transform: translateY(-6px);
    background: rgba(255, 255, 255, 0.09);
    border-color: rgba(0, 201, 183, 0.3);
  }
  
  .expertise-card i {
    font-size: 2rem;
    color: var(--accent);
  }
  
  .expertise-card h3 {
    font-size: 1.15rem;
    color: #ffffff;
    margin: 0;
  }
  
  .expertise-card span {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.2s;
  }
  
  .expertise-card:hover span {
    gap: 10px;
  }
  
  /* ---------- APPROACH (LIGHT) ---------- */
  .approach {
    padding: 100px 0;
  }
  
  .approach-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 28px;
  }
  
  .approach-step {
    background: var(--light-bg);
    border-radius: var(--radius-sm);
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform 0.25s;
  }
  
  .approach-step:hover {
    transform: translateY(-6px);
  }
  
  .step-num {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent);
    opacity: 0.4;
    line-height: 1;
    margin-bottom: 14px;
  }
  
  .approach-step h3 {
    font-size: 1.2rem;
    color: var(--primary);
    margin-bottom: 10px;
  }
  
  .approach-step p {
    color: var(--text-muted);
    font-size: 0.92rem;
    line-height: 1.6;
  }
  
  /* ---------- ABOUT CTA (DARK) ---------- */
  .about-cta {
    padding: 100px 0;
  }
  
  .cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
  }
  
  .cta-content h2 {
    font-size: 2.8rem;
    margin-bottom: 20px;
  }
  
  .cta-content p {
    font-size: 1.25rem;
    color: #94a3b8;
    margin-bottom: 40px;
  }
  
  .cta-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }
  
  /* ---------- FOOTER ---------- */
  footer {
    background: #060f1a;
    color: rgba(255, 255, 255, 0.65);
    padding: 60px 0 30px;
  }
  
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
  }
  
  .footer-brand .logo {
    font-size: 1.6rem;
    margin-bottom: 18px;
    display: inline-block;
  }
  
  .footer-brand p {
    max-width: 280px;
    font-size: 0.95rem;
    line-height: 1.7;
  }
  
  .footer-social {
    display: flex;
    gap: 16px;
    margin-top: 22px;
  }
  
  .footer-social a {
    color: rgba(255, 255, 255, 0.5);
    font-size: 1.2rem;
    transition: color 0.2s;
  }
  
  .footer-social a:hover {
    color: var(--accent);
  }
  
  .footer-col h4 {
    color: white;
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 600;
  }
  
  .footer-col ul {
    list-style: none;
  }
  
  .footer-col li {
    margin-bottom: 12px;
  }
  
  .footer-col a {
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s;
  }
  
  .footer-col a:hover {
    color: var(--accent);
  }
  
  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
    font-size: 0.9rem;
  }
  
  /* ---------- RESPONSIVE ---------- */
  @media (max-width: 1100px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr 1fr;
    }
  }
  
  @media (max-width: 1024px) {
    .intro-grid {
      grid-template-columns: 1fr;
    }
    .mv-grid {
      grid-template-columns: 1fr;
    }
    .page-hero h1 {
      font-size: 3rem;
    }
  }
  
  @media (max-width: 900px) {
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  
  @media (max-width: 768px) {
    .menu-toggle {
      display: block;
    }
    nav ul {
      display: none;
      position: absolute;
      top: 80px;
      left: 20px;
      right: 20px;
      background: rgba(10, 25, 45, 0.98);
      backdrop-filter: blur(12px);
      flex-direction: column;
      padding: 30px;
      border-radius: 24px;
      border: 1px solid rgba(255, 255, 255, 0.1);
      gap: 20px;
    }
    nav ul.active {
      display: flex;
    }
    .page-hero h1 {
      font-size: 2.4rem;
    }
    .page-hero p {
      font-size: 1.1rem;
    }
    h2 {
      font-size: 2rem;
    }
    .cta-content h2 {
      font-size: 2.2rem;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 30px;
    }
    .footer-bottom {
      flex-direction: column;
      text-align: center;
    }
    .cta-buttons .btn {
      width: 100%;
      text-align: center;
    }
  }
  
  @media (max-width: 480px) {
    .container {
      padding: 0 18px;
    }
    .page-hero {
      padding: 140px 0 70px;
    }
    .page-hero h1 {
      font-size: 2rem;
    }
    .btn {
      padding: 14px 24px;
      font-size: 0.95rem;
    }
    .stat-block {
      grid-template-columns: 1fr;
    }
  }