:root {
      --bg: #050816;
      --bg-elevated: #0b1220;
      --bg-soft: #020617;
      --text: #e5e7eb;
      --muted: #9ca3af;
      --accent: #38bdf8;
      --accent-soft: rgba(56, 189, 248, 0.15);
      --accent-secondary: #facc15;
      --border-subtle: rgba(148, 163, 184, 0.3);
      --radius-xl: 18px;
      --radius-pill: 999px;
      --shadow-soft: 0 22px 45px rgba(15, 23, 42, 0.75);
      --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
        "Segoe UI", sans-serif;
      --max-width: 1100px;
      --header-height: 72px;
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: var(--header-height);
    }

    body {
      margin: 0;
      font-family: var(--font-sans);
      background: radial-gradient(circle at top, #0b1120 0, #020617 40%, #000 100%);
      color: var(--text);
      line-height: 1.6;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

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

    /* Layout wrappers */

    .page {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
    }

    .shell {
      width: 100%;
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    /* Header & nav */

    header {
      position: sticky;
      top: 0;
      z-index: 40;
      backdrop-filter: blur(14px);
      background: linear-gradient(
        to bottom,
        rgba(2, 6, 23, 0.95),
        rgba(2, 6, 23, 0.7),
        transparent
      );
      border-bottom: 1px solid rgba(15, 23, 42, 0.8);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-height);
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .brand-mark {
      width: 32px;
      height: 32px;
      display: block;
      filter: drop-shadow(0 0 8px rgba(56, 189, 248, 0.3));
      transition: filter 0.2s ease;
    }

    .brand:hover .brand-mark {
      filter: drop-shadow(0 0 12px rgba(56, 189, 248, 0.5));
    }

    .brand-text-primary {
      font-weight: 700;
      letter-spacing: 0.08em;
      font-size: 0.85rem;
      text-transform: uppercase;
    }

    .brand-text-secondary {
      font-size: 0.75rem;
      color: var(--muted);
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 18px;
      font-size: 0.9rem;
    }

    .nav-links a {
      padding: 8px 10px;
      border-radius: 999px;
      color: var(--muted);
      border: 1px solid transparent;
      transition: color 0.2s ease, background-color 0.2s ease, border-color 0.2s ease,
        box-shadow 0.2s ease;
    }

    .nav-links a:hover {
      color: var(--text);
      background: rgba(15, 23, 42, 0.9);
      border-color: rgba(51, 65, 85, 0.8);
      box-shadow: 0 0 0 1px rgba(8, 47, 73, 0.8);
    }

    .nav-links a.active {
      color: var(--text);
      background: var(--accent-soft);
      border-color: rgba(56, 189, 248, 0.7);
      box-shadow: 0 0 0 1px rgba(8, 47, 73, 0.7);
    }

    .nav-cta {
      padding: 8px 14px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(56, 189, 248, 0.6);
      background: linear-gradient(
        120deg,
        rgba(56, 189, 248, 0.12),
        rgba(15, 23, 42, 0.4)
      );
      color: var(--text);
      font-size: 0.85rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      box-shadow: 0 0 22px rgba(8, 47, 73, 0.7);
    }

    .nav-cta span {
      font-size: 1.1rem;
    }

    .lang-switcher {
      display: flex;
      align-items: center;
      gap: 6px;
      margin-left: 12px;
      padding-left: 12px;
      border-left: 1px solid var(--border-subtle);
    }

    .lang-option {
      font-size: 0.8rem;
      color: var(--muted);
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .lang-option:hover {
      color: var(--text);
    }

    .lang-option.active {
      color: var(--accent);
      font-weight: 600;
    }

    .lang-divider {
      color: var(--border-subtle);
      font-size: 0.75rem;
    }

    .nav-toggle {
      display: none;
      background: none;
      border: 1px solid rgba(51, 65, 85, 0.8);
      border-radius: 999px;
      padding: 7px 9px;
      color: var(--text);
      cursor: pointer;
    }

    .nav-toggle-icon {
      width: 18px;
      height: 2px;
      border-radius: 999px;
      background: var(--text);
      position: relative;
      display: block;
    }

    .nav-toggle-icon::before,
    .nav-toggle-icon::after {
      content: "";
      position: absolute;
      left: 0;
      width: 18px;
      height: 2px;
      border-radius: inherit;
      background: inherit;
    }

    .nav-toggle-icon::before {
      top: -6px;
    }

    .nav-toggle-icon::after {
      top: 6px;
    }

    /* Hero */

    main {
      flex: 1;
    }

    section {
      padding: 30px 0;
    }

    #home {
      padding-top: 40px;
      padding-bottom: 40px;
    }

    .hero {
      display: flex;
      flex-direction: column;
      gap: 40px;
    }

    .hero-image-container {
      position: relative;
      width: 100%;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(56, 189, 248, 0.3);
    }

    .hero-main-image {
      width: 100%;
      height: auto;
      display: block;
    }

    .hero-overlay {
      position: absolute;
      top: 0;
      right: 0;
      bottom: 0;
      width: 60%;
      background: linear-gradient(
        to left,
        rgba(5, 8, 22, 0.75) 0%,
        rgba(5, 8, 22, 0.75) 90%,
        transparent 100%
      );
      display: flex;
      align-items: center;
      padding: 60px 40px 60px 100px;
    }

    .hero-overlay-content {
      max-width: 550px;
      margin-left: auto;
    }

    .hero-content-below {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }

    .hero-content-row {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
      align-items: start;
    }

    .hero-kicker {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 4px 8px;
      border-radius: var(--radius-pill);
      font-size: 0.75rem;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--muted);
      border: 1px solid rgba(51, 65, 85, 0.9);
      background: radial-gradient(circle at left, rgba(56, 189, 248, 0.2), transparent);
    }

    .hero-kicker-dot {
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--accent-secondary);
      box-shadow: 0 0 12px rgba(250, 204, 21, 0.9);
    }

    .hero-title {
      margin-top: 16px;
      font-size: clamp(2rem, 3.5vw, 2.6rem);
      font-weight: 700;
      letter-spacing: 0.01em;
      line-height: 1.2;
    }

    .hero-title span {
      background: linear-gradient(120deg, var(--accent), var(--accent-secondary));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .hero-subtitle {
      margin-top: 12px;
      font-size: 0.95rem;
      color: var(--muted);
      line-height: 1.6;
    }

    .hero-subtitle strong {
      color: var(--text);
      font-weight: 500;
    }

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 0.83rem;
      color: var(--muted);
    }

    .hero-tag {
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      border: 1px solid rgba(51, 65, 85, 0.8);
      background: rgba(15, 23, 42, 0.8);
    }

    .hero-actions {
      margin-top: 26px;
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .btn-primary,
    .btn-ghost {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      padding: 12px 20px;
      border-radius: var(--radius-pill);
      font-size: 0.9rem;
      border: 1px solid transparent;
      cursor: pointer;
      transition: transform 0.18s ease, box-shadow 0.18s ease,
        background-color 0.18s ease, border-color 0.18s ease;
      text-decoration: none;
      white-space: nowrap;
    }

    .btn-primary {
      background: radial-gradient(circle at top left, var(--accent-secondary), var(--accent));
      border-color: rgba(15, 23, 42, 0.9);
      color: #020617;
      box-shadow: 0 18px 45px rgba(8, 47, 73, 0.8);
      font-weight: 600;
    }

    .btn-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 22px 60px rgba(8, 47, 73, 0.9);
    }

    .btn-ghost {
      border-color: rgba(75, 85, 99, 0.9);
      color: var(--muted);
      background: rgba(15, 23, 42, 0.9);
    }

    .btn-ghost:hover {
      color: var(--text);
      transform: translateY(-1px);
      box-shadow: 0 14px 32px rgba(15, 23, 42, 0.9);
      border-color: rgba(156, 163, 175, 0.9);
    }

    .btn-icon {
      font-size: 1.3rem;
      line-height: 1;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }

    .btn-icon-envelope {
      font-size: 2rem;
      line-height: 0;
      vertical-align: middle;
      position: relative;
      top: -4px;
    }

    .hero-card {
      background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.18), transparent),
        radial-gradient(circle at bottom right, rgba(250, 204, 21, 0.25), transparent),
        linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.92));
      border-radius: 26px;
      padding: 22px 20px 20px;
      border: 1px solid rgba(30, 64, 175, 0.9);
      box-shadow: var(--shadow-soft);
      position: relative;
      overflow: hidden;
    }

    .hero-card-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 16px;
      font-size: 0.78rem;
      color: var(--muted);
    }

    .hero-pill {
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(148, 163, 184, 0.7);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .hero-pill-dot {
      width: 7px;
      height: 7px;
      border-radius: 999px;
      background: var(--accent);
      box-shadow: 0 0 10px rgba(56, 189, 248, 0.9);
    }

    .hero-card-body {
      font-size: 0.9rem;
    }

    .hero-card-title {
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 8px;
    }

    .hero-card-grid {
      display: grid;
      grid-template-columns: 1.1fr 1.1fr;
      gap: 10px;
      margin-top: 10px;
      font-size: 0.8rem;
    }

    .mini-label {
      text-transform: uppercase;
      letter-spacing: 0.08em;
      font-size: 0.68rem;
      color: var(--muted);
      margin-bottom: 3px;
    }

    .mini-pill {
      border-radius: var(--radius-pill);
      padding: 4px 10px;
      border: 1px solid rgba(56, 189, 248, 0.4);
      background: rgba(15, 23, 42, 0.9);
      font-size: 0.78rem;
    }

    .hero-orbit {
      position: absolute;
      inset: -40px;
      pointer-events: none;
      opacity: 0.8;
      mix-blend-mode: screen;
    }

    .hero-orbit::before,
    .hero-orbit::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      border: 1px dashed rgba(56, 189, 248, 0.4);
    }

    .hero-orbit::before {
      width: 260px;
      height: 260px;
      top: 0;
      right: -40px;
    }

    .hero-orbit::after {
      width: 220px;
      height: 220px;
      bottom: -30px;
      left: -30px;
      border-color: rgba(250, 204, 21, 0.45);
    }

    /* Section headings */

    .section-heading {
      font-size: 0.78rem;
      text-transform: uppercase;
      letter-spacing: 0.2em;
      color: var(--muted);
      margin-bottom: 6px;
    }

    .section-title {
      font-size: 1.35rem;
      font-weight: 600;
      margin-bottom: 4px;
    }

    .section-subtitle {
      font-size: 0.9rem;
      color: var(--muted);
      max-width: 620px;
    }

    .section-header {
      margin-bottom: 26px;
    }

    /* About */

    .about-grid {
      display: grid;
      grid-template-columns: minmax(0, 1.2fr) minmax(0, 2fr) minmax(0, 1.8fr);
      gap: 26px;
    }

    .about-image-wrapper {
      position: relative;
      border-radius: var(--radius-xl);
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(15, 23, 42, 0.6);
      border: 1px solid rgba(56, 189, 248, 0.2);
    }

    .about-image {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .about-text {
      font-size: 0.95rem;
      color: var(--muted);
    }

    .about-text p {
      margin: 0 0 12px;
    }

    .about-text strong {
      color: var(--text);
      font-weight: 500;
    }

    .about-meta {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 10px;
      margin-top: 8px;
    }

    .about-meta-card {
      padding: 10px 14px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(51, 65, 85, 0.9);
      background: rgba(15, 23, 42, 0.9);
      font-size: 0.82rem;
      color: var(--muted);
      text-align: center;
    }

    .about-meta-card span {
      display: block;
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--accent);
    }

    .about-list {
      list-style: none;
      padding: 0;
      margin: 0;
      font-size: 0.85rem;
      color: var(--muted);
    }

    .about-list li {
      display: flex;
      align-items: flex-start;
      gap: 8px;
      margin-bottom: 6px;
    }

    .about-bullet {
      width: 6px;
      min-width: 6px;
      height: 6px;
      border-radius: 999px;
      background: var(--accent-secondary);
      margin-top: 6px;
      flex-shrink: 0;
    }

    /* Experience */

    .experience-grid {
      display: flex;
      justify-content: center;
    }

    .experience-grid .timeline {
      width: 100%;
      max-width: 900px;
    }

    .experience-pill {
      border-radius: var(--radius-xl);
      padding: 12px 13px;
      background: radial-gradient(circle at top, rgba(56, 189, 248, 0.16), transparent),
        linear-gradient(135deg, rgba(15, 23, 42, 0.95), rgba(15, 23, 42, 0.98));
      border: 1px solid rgba(56, 189, 248, 0.55);
      font-size: 0.82rem;
      color: var(--muted);
    }

    .experience-pill strong {
      color: var(--text);
      font-weight: 500;
    }

    .timeline {
      border-radius: var(--radius-xl);
      padding: 14px 16px 10px;
      border: 1px solid var(--border-subtle);
      background: rgba(15, 23, 42, 0.9);
      font-size: 0.82rem;
    }

    .timeline-item {
      display: grid;
      grid-template-columns: minmax(0, 2fr) minmax(0, 1.2fr);
      gap: 12px;
      padding: 8px 0;
    }

    .timeline-item + .timeline-item {
      border-top: 1px dashed rgba(31, 41, 55, 0.9);
    }

    .timeline-role {
      font-weight: 500;
      color: var(--text);
    }

    .timeline-company {
      color: var(--muted);
      font-size: 0.8rem;
    }

    .timeline-meta {
      text-align: right;
      color: var(--muted);
      font-size: 0.78rem;
    }

    .timeline-tags {
      margin-top: 4px;
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      font-size: 0.75rem;
    }

    .timeline-tag {
      padding: 3px 8px;
      border-radius: var(--radius-pill);
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(51, 65, 85, 0.9);
    }

    .timeline-description {
      margin-top: 6px;
      font-size: 0.88rem;
      color: var(--muted);
      line-height: 1.5;
    }

    .timeline-contributions {
      margin: 10px 0 0 0;
      padding-left: 18px;
      font-size: 0.82rem;
      color: var(--muted);
      line-height: 1.6;
    }

    .timeline-contributions li {
      margin-bottom: 4px;
    }

    .timeline-contributions li::marker {
      color: var(--accent);
    }

    /* Education */

    .education-section {
      margin-top: 20px;
      padding-top: 20px;
      border-top: 1px solid var(--border-subtle);
      width: 100%;
    }

    .education-header {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 12px;
      padding-bottom: 8px;
      border-bottom: 1px solid var(--border-subtle);
    }

    .education-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }

    .education-item {
      padding: 12px 14px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-subtle);
    }

    .education-degree {
      font-weight: 500;
      color: var(--text);
      font-size: 0.85rem;
    }

    .education-school {
      color: var(--muted);
      font-size: 0.78rem;
      margin-top: 2px;
    }

    .education-detail {
      color: var(--accent);
      font-size: 0.75rem;
      margin-top: 4px;
    }

    .education-tech {
      font-size: 0.78rem;
      color: var(--muted);
      line-height: 1.6;
      padding: 12px 14px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.4);
      border: 1px solid var(--border-subtle);
    }

    .education-tech strong {
      color: var(--text);
    }

    /* Projects */

    .featured-project {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
      padding: 24px;
      border-radius: var(--radius-xl);
      background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.12), transparent),
        radial-gradient(circle at bottom right, rgba(250, 204, 21, 0.08), transparent),
        linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.92));
      border: 1px solid rgba(56, 189, 248, 0.4);
      box-shadow: var(--shadow-soft);
    }

    .featured-project-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 12px;
    }

    .featured-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(56, 189, 248, 0.6);
      font-size: 0.75rem;
      text-transform: uppercase;
      letter-spacing: 0.08em;
      color: var(--accent);
    }

    .featured-badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      box-shadow: 0 0 8px rgba(56, 189, 248, 0.8);
    }

    .featured-link {
      font-size: 0.85rem;
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
      transition: color 0.2s ease;
    }

    .featured-link:hover {
      color: var(--accent-secondary);
    }

    .featured-title {
      font-size: 1.5rem;
      font-weight: 700;
      margin: 0 0 8px;
      background: linear-gradient(120deg, var(--text), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .featured-tagline {
      font-size: 1rem;
      color: var(--text);
      margin: 0 0 12px;
      font-weight: 500;
    }

    .featured-description {
      font-size: 0.88rem;
      color: var(--muted);
      margin: 0 0 10px;
      line-height: 1.6;
    }

    .featured-description em {
      color: var(--text);
      font-style: italic;
    }

    .featured-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 14px;
    }

    .featured-project-video {
      display: flex;
      flex-direction: column;
      justify-content: center;
    }

    .project-video {
      width: 100%;
      border-radius: 12px;
      border: 1px solid rgba(56, 189, 248, 0.3);
      background: #000;
    }

    .cards-grid {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 16px;
    }

    .card {
      border-radius: var(--radius-xl);
      padding: 14px 13px 13px;
      border: 1px solid var(--border-subtle);
      background: linear-gradient(160deg, rgba(15, 23, 42, 0.96), rgba(15, 23, 42, 0.9));
      font-size: 0.83rem;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .card-title {
      font-size: 0.95rem;
      font-weight: 600;
    }

    .card-tagline {
      color: var(--muted);
    }

    .card-meta {
      margin-top: 2px;
      font-size: 0.78rem;
      color: var(--muted);
    }

    .card-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-top: 6px;
      font-size: 0.75rem;
    }

    .card-tag {
      padding: 3px 8px;
      border-radius: var(--radius-pill);
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(51, 65, 85, 0.9);
    }

    .card-footer {
      margin-top: auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 6px;
      font-size: 0.78rem;
      color: var(--muted);
    }

    .card-link {
      color: var(--accent);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .card-link span {
      font-size: 0.9rem;
    }

    /* Writing */

    .writing-layout {
      display: flex;
      justify-content: center;
      max-width: 700px;
      margin: 0 auto;
    }

    .writing-intro {
      font-size: 0.9rem;
      color: var(--muted);
    }

    .writing-intro p {
      margin: 0 0 10px;
    }

    .chips {
      display: flex;
      flex-wrap: wrap;
      gap: 7px;
      font-size: 0.78rem;
      margin-top: 6px;
    }

    .chip {
      padding: 4px 9px;
      border-radius: var(--radius-pill);
      background: rgba(15, 23, 42, 0.9);
      border: 1px solid rgba(51, 65, 85, 0.9);
      color: var(--muted);
    }

    .writing-list {
      list-style: none;
      padding: 0;
      margin: 0;
      font-size: 0.86rem;
      width: 100%;
    }

    .writing-item + .writing-item {
      margin-top: 10px;
      border-top: 1px dashed rgba(31, 41, 55, 0.9);
      padding-top: 10px;
    }

    .writing-item a {
      color: var(--accent);
      font-weight: 500;
      transition: color 0.2s ease;
    }

    .writing-item a:hover {
      color: var(--accent-secondary);
    }

    .writing-item p {
      margin: 3px 0 0;
      color: var(--muted);
      font-size: 0.82rem;
    }

    /* InnovationEQ Section */

    .innovationeq-content {
      max-width: 900px;
      margin: 0 auto;
    }

    .innovationeq-hero {
      margin-bottom: 24px;
      border-radius: var(--radius-xl);
      overflow: hidden;
    }

    .innovationeq-hero img {
      width: 100%;
      height: auto;
      display: block;
    }

    .innovationeq-intro {
      text-align: center;
      margin-bottom: 24px;
    }

    .innovationeq-goals {
      margin-bottom: 32px;
      border-radius: var(--radius-xl);
      overflow: hidden;
    }

    .innovationeq-goals img {
      width: 100%;
      height: auto;
      display: block;
    }

    .innovationeq-intro p {
      color: var(--muted);
      font-size: 0.95rem;
      line-height: 1.7;
    }

    .innovationeq-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 32px;
    }

    .innovationeq-card {
      padding: 20px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-subtle);
      transition: border-color 0.2s ease, transform 0.2s ease;
    }

    .innovationeq-card:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
    }

    .innovationeq-card-icon {
      font-size: 1.8rem;
      margin-bottom: 10px;
    }

    .innovationeq-card h3 {
      color: var(--text);
      font-size: 0.95rem;
      font-weight: 600;
      margin: 0 0 8px;
    }

    .innovationeq-card p {
      color: var(--muted);
      font-size: 0.8rem;
      line-height: 1.5;
      margin: 0;
    }

    .innovationeq-principles {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }

    .innovationeq-principle {
      padding: 20px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.5);
      border: 1px solid var(--border-subtle);
      position: relative;
      transition: border-color 0.2s ease;
    }

    .innovationeq-principle:hover {
      border-color: rgba(250, 204, 21, 0.4);
    }

    .principle-number {
      position: absolute;
      top: 16px;
      right: 16px;
      font-size: 0.7rem;
      font-weight: 700;
      color: rgba(250, 204, 21, 0.5);
      letter-spacing: 0.05em;
    }

    .innovationeq-principle blockquote {
      color: var(--accent-secondary);
      font-size: 0.95rem;
      font-weight: 600;
      font-style: italic;
      margin: 0 0 10px;
      padding-right: 30px;
      line-height: 1.4;
    }

    .innovationeq-principle p {
      color: var(--muted);
      font-size: 0.8rem;
      line-height: 1.55;
      margin: 0;
    }

    .innovationeq-philosophy {
      text-align: center;
      padding: 24px;
      border-radius: var(--radius-xl);
      background: rgba(56, 189, 248, 0.08);
      border: 1px solid rgba(56, 189, 248, 0.2);
    }

    .innovationeq-philosophy blockquote {
      color: var(--accent);
      font-size: 1.2rem;
      font-weight: 600;
      font-style: italic;
      margin: 0 0 12px;
    }

    .innovationeq-philosophy p {
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.6;
      margin: 0;
    }

    .innovationeq-cta {
      margin-top: 32px;
      border-radius: var(--radius-xl);
      background: linear-gradient(135deg, rgba(56, 189, 248, 0.1) 0%, rgba(250, 204, 21, 0.08) 100%);
      border: 1px solid rgba(56, 189, 248, 0.25);
      overflow: hidden;
    }

    .innovationeq-cta-image-full {
      width: 100%;
    }

    .innovationeq-cta-image-full img {
      width: 100%;
      height: auto;
      display: block;
    }

    .innovationeq-cta-content {
      padding: 28px;
      text-align: center;
    }

    .innovationeq-cta-content h3 {
      color: var(--text);
      font-size: 1.4rem;
      font-weight: 600;
      margin: 0 0 12px;
    }

    .innovationeq-cta-content > p {
      color: var(--muted);
      font-size: 0.95rem;
      line-height: 1.6;
      margin: 0 0 24px;
      max-width: 650px;
      margin-left: auto;
      margin-right: auto;
    }

    .innovationeq-cta-options {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 16px;
      margin-bottom: 24px;
    }

    .cta-option {
      padding: 20px;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-subtle);
      text-align: left;
    }

    .cta-option-icon {
      font-size: 1.6rem;
      margin-bottom: 10px;
    }

    .cta-option h4 {
      color: var(--text);
      font-size: 0.95rem;
      font-weight: 600;
      margin: 0 0 8px;
    }

    .cta-option p {
      color: var(--muted);
      font-size: 0.8rem;
      line-height: 1.5;
      margin: 0;
    }

    .innovationeq-cta-button {
      display: inline-block;
      padding: 14px 32px;
      border-radius: var(--radius-pill);
      background: linear-gradient(135deg, var(--accent) 0%, rgba(56, 189, 248, 0.8) 100%);
      color: #0f172a;
      font-weight: 600;
      font-size: 0.95rem;
      text-decoration: none;
      transition: transform 0.2s ease, box-shadow 0.2s ease;
    }

    .innovationeq-cta-button:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(56, 189, 248, 0.3);
    }

    .writing-featured {
      padding: 20px;
      border-radius: var(--radius-xl);
      background: rgba(15, 23, 42, 0.5);
      border: 1px solid rgba(56, 189, 248, 0.2);
      margin-bottom: 24px;
    }

    .writing-featured-title {
      color: var(--accent);
      font-weight: 600;
      font-size: 1.1rem;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .writing-featured-title:hover {
      color: var(--accent-secondary);
    }

    .writing-featured-desc {
      margin: 8px 0 0;
      color: var(--muted);
      font-size: 0.88rem;
      line-height: 1.5;
    }

    .article-cards-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .article-card {
      display: flex;
      flex-direction: column;
      border-radius: var(--radius-lg);
      background: rgba(15, 23, 42, 0.6);
      border: 1px solid var(--border-subtle);
      overflow: hidden;
      text-decoration: none;
      transition: border-color 0.2s ease, transform 0.2s ease;
    }

    .article-card:hover {
      border-color: var(--accent);
      transform: translateY(-2px);
    }

    .article-card-image {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }

    .article-card-image img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .article-card-content {
      padding: 14px;
      flex: 1;
    }

    .article-card-content h3 {
      color: var(--text);
      font-size: 0.95rem;
      font-weight: 600;
      margin: 0 0 6px;
      line-height: 1.3;
    }

    .article-card-content p {
      color: var(--muted);
      font-size: 0.8rem;
      margin: 0;
      line-height: 1.4;
    }

    .writing-video-wrapper {
      margin-top: 12px;
      position: relative;
      padding-bottom: 56.25%; /* 16:9 aspect ratio */
      height: 0;
      overflow: hidden;
    }

    .writing-video {
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      border-radius: 10px;
      border: 1px solid rgba(56, 189, 248, 0.3);
      background: #000;
    }

    .video-caption {
      margin: 6px 0 0;
      font-size: 0.75rem;
      color: var(--muted);
      font-style: italic;
    }

    /* Contact */

    .contact-grid {
      display: flex;
      justify-content: center;
      max-width: 600px;
      margin: 0 auto;
    }

    .contact-card {
      border-radius: var(--radius-xl);
      padding: 16px 16px 14px;
      border: 1px solid rgba(56, 189, 248, 0.6);
      background: radial-gradient(circle at top left, rgba(56, 189, 248, 0.2), transparent),
        linear-gradient(145deg, rgba(15, 23, 42, 0.98), rgba(15, 23, 42, 0.9));
      box-shadow: var(--shadow-soft);
      font-size: 0.88rem;
    }

    .contact-card p {
      margin: 0 0 10px;
      color: var(--muted);
    }

    .contact-ways {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
      margin-top: 8px;
      font-size: 0.82rem;
    }

    .contact-way {
      border-radius: var(--radius-xl);
      padding: 8px 10px;
      border: 1px solid rgba(30, 64, 175, 0.9);
      background: rgba(15, 23, 42, 0.9);
    }

    .contact-way strong {
      display: block;
    }

    .contact-way a {
      color: var(--accent);
      word-break: break-all;
    }

    .contact-form {
      border-radius: var(--radius-xl);
      padding: 16px 14px 14px;
      border: 1px solid var(--border-subtle);
      background: rgba(15, 23, 42, 0.94);
      font-size: 0.86rem;
      width: 100%;
    }

    .form-row {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 10px;
    }

    .form-field {
      display: flex;
      flex-direction: column;
      gap: 4px;
      margin-bottom: 10px;
    }

    .form-label {
      font-size: 0.78rem;
      color: var(--muted);
    }

    .form-input,
    .form-textarea {
      border-radius: 10px;
      border: 1px solid rgba(55, 65, 81, 0.9);
      background: rgba(15, 23, 42, 0.98);
      padding: 8px 9px;
      font-size: 0.85rem;
      color: var(--text);
      font-family: var(--font-sans);
      outline: none;
      resize: vertical;
      min-height: 38px;
    }

    .form-input:focus,
    .form-textarea:focus {
      border-color: rgba(56, 189, 248, 0.8);
      box-shadow: 0 0 0 1px rgba(56, 189, 248, 0.6);
    }

    .form-note {
      font-size: 0.78rem;
      color: var(--muted);
      margin-top: 4px;
    }

    /* Footer */

    footer {
      border-top: 1px solid rgba(15, 23, 42, 0.95);
      padding: 16px 0 18px;
      font-size: 0.8rem;
      color: var(--muted);
      background: radial-gradient(circle at top, #020617, #020617);
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 10px;
      flex-wrap: wrap;
    }

    .footer-links {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
    }

    .footer-links a {
      color: var(--muted);
    }

    .footer-links a:hover {
      color: var(--accent);
    }

    /* Responsive */

    @media (max-width: 1024px) {
      .about-grid {
        grid-template-columns: minmax(0, 1fr) minmax(0, 1.5fr);
      }

      .about-grid > div:nth-child(3) {
        grid-column: 1 / -1;
      }

      .experience-grid .timeline {
        max-width: 100%;
      }
    }

    @media (max-width: 900px) {
      .hero-overlay {
        position: static;
        width: 100%;
        background: linear-gradient(
          to bottom,
          transparent 0%,
          rgba(5, 8, 22, 0.7) 40%,
          rgba(5, 8, 22, 0.95) 100%
        );
        padding: 40px 30px;
      }

      .hero-overlay-content {
        margin-left: 0;
      }

      .hero-content-row {
        grid-template-columns: minmax(0, 1fr);
      }

      .about-grid {
        grid-template-columns: minmax(0, 1fr);
      }

      .about-grid > div:first-child {
        order: -1;
      }

      .about-grid > div:nth-child(3) {
        grid-column: auto;
      }

      .about-meta {
        grid-template-columns: minmax(0, 1fr);
      }

      .experience-grid .timeline {
        max-width: 100%;
      }

      .education-grid {
        grid-template-columns: 1fr;
      }

      .featured-project {
        grid-template-columns: minmax(0, 1fr);
      }

      .cards-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
      }

      .article-cards-grid {
        grid-template-columns: 1fr;
      }

      .innovationeq-grid {
        grid-template-columns: repeat(2, 1fr);
      }

      .innovationeq-principles {
        grid-template-columns: 1fr;
      }

      .innovationeq-cta-options {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 720px) {
      .header-inner {
        gap: 10px;
      }

      .nav-toggle {
        display: block;
      }

      .nav-links {
        position: absolute;
        top: var(--header-height);
        right: 20px;
        left: 20px;
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
        padding: 10px 10px 10px;
        border-radius: 18px;
        background: rgba(15, 23, 42, 0.98);
        border: 1px solid rgba(30, 64, 175, 0.9);
        transform-origin: top;
        transform: scaleY(0.8);
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.18s ease, transform 0.18s ease;
      }

      .nav-links.nav-open {
        opacity: 1;
        pointer-events: auto;
        transform: scaleY(1);
      }

      .nav-links a {
        width: 100%;
      }

      .nav-cta {
        width: 100%;
        justify-content: center;
        margin-top: 4px;
      }

      section {
        padding: 60px 0;
      }

      #home {
        padding-top: 70px;
      }

      .timeline-item {
        grid-template-columns: minmax(0, 1fr);
        gap: 4px;
      }

      .timeline-meta {
        text-align: left;
        font-size: 0.75rem;
        color: var(--accent);
      }

      .featured-project {
        padding: 18px;
        gap: 20px;
      }

      .featured-title {
        font-size: 1.25rem;
      }

      .cards-grid {
        grid-template-columns: minmax(0, 1fr);
      }

      .contact-ways {
        grid-template-columns: minmax(0, 1fr);
      }

      .form-row {
        grid-template-columns: minmax(0, 1fr);
      }

      .innovationeq-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (prefers-reduced-motion: reduce) {
      * {
        scroll-behavior: auto !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
    }