* {
      color: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
    }

    .imgc {
      width: 404.8px;
      height: 160px;
      object-fit: cover;
      /*contain */
    }

    /* ===== DESIGN SYSTEM ===== */
    :root {
      --bg: #050d14;
      --surface: rgba(255, 255, 255, 0.04);
      --glass: rgba(255, 255, 255, 0.07);
      --border: rgba(0, 255, 180, 0.18);
      --accent: #00ffb2;
      --accent2: #00c9ff;
      --text: #e8f5ef;
      --muted: rgba(232, 245, 239, 0.5);
      --header-bg: rgba(5, 13, 20, 0.75);
      --radius: 16px;
      --mono: 'Space Mono', monospace;
      --sans: 'Vazirmatn', sans-serif;
    }

    body.light {
      --bg: #f0f4f8;
      --surface: rgba(0, 0, 0, 0.03);
      --glass: rgba(255, 255, 255, 0.65);
      --border: rgba(0, 180, 130, 0.25);
      --accent: #00916e;
      --accent2: #0077b6;
      --text: #111c1a;
      --muted: rgba(17, 28, 26, 0.5);
      --header-bg: rgba(240, 244, 248, 0.85);
    }

    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--sans);
      background: var(--bg);
      color: var(--text);
      min-height: 100vh;
      overflow-x: hidden;
      opacity: 0;
      transform: translateY(18px);
      transition: opacity 0.9s ease, transform 0.9s ease, background 0.4s, color 0.4s;
    }

    body.loaded {
      opacity: 1;
      transform: translateY(0);
    }

    /* ===== ORBS ===== */
    .orb {
      position: fixed;
      border-radius: 50%;
      filter: blur(90px);
      pointer-events: none;
      z-index: 0;
      opacity: 0.22;
    }

    .orb-1 {
      width: 520px;
      height: 520px;
      background: var(--accent);
      top: -180px;
      left: -160px;
    }

    .orb-2 {
      width: 400px;
      height: 400px;
      background: var(--accent2);
      bottom: -120px;
      right: -100px;
    }

    .orb-3 {
      width: 260px;
      height: 260px;
      background: var(--accent);
      top: 50%;
      left: 55%;
      opacity: 0.1;
    }

    /* ===== NOISE ===== */
    body::before {
      content: '';
      position: fixed;
      inset: 0;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.75' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='0.04'/%3E%3C/svg%3E");
      pointer-events: none;
      z-index: 1;
      opacity: 0.35;
    }

    /* ===== HEADER ===== */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 32px;
      background: var(--header-bg);
      backdrop-filter: blur(18px);
      border-bottom: 1px solid var(--border);
      gap: 16px;
    }

    .logo {
      font-family: var(--mono);
      font-size: 17px;
      font-weight: 700;
      color: var(--accent);
      white-space: nowrap;
      letter-spacing: -0.5px;
      text-decoration: none;
    }

    /* ===== LOGO ===== */
    .logo img {
      height: 36px;
      width: auto;
      display: block;
    }

    /* dark mode (default): show dark logo, hide light logo */
    .logo .logo-light {
      display: none;
    }

    .logo .logo-dark {
      display: block;
    }

    /* light mode: show light logo, hide dark logo */
    body.light .logo .logo-light {
      display: block;
    }

    body.light .logo .logo-dark {
      display: none;
    }

    /* ===== DESKTOP NAV ===== */
    .desktop-nav {
      display: none;
      gap: 4px;
    }

    @media (min-width: 900px) {
      .desktop-nav {
        display: flex;
      }
    }

    .desktop-nav a {
      font-family: var(--mono);
      font-size: 13px;
      color: var(--muted);
      text-decoration: none;
      padding: 7px 14px;
      border-radius: 8px;
      letter-spacing: 0.4px;
      transition: color 0.2s, background 0.2s;
      position: relative;
    }

    .desktop-nav a::after {
      content: '';
      position: absolute;
      bottom: 4px;
      left: 14px;
      right: 14px;
      height: 1.5px;
      background: var(--accent);
      transform: scaleX(0);
      transition: transform 0.25s ease;
    }

    .desktop-nav a:hover {
      color: var(--accent);
    }

    .desktop-nav a:hover::after {
      transform: scaleX(1);
    }

    .desktop-nav a.active {
      color: var(--accent);
    }

    .desktop-nav a.active::after {
      transform: scaleX(1);
    }

    /* ===== CONTROLS ===== */
    .right-controls {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .ctrl-btn {
      font-family: var(--mono);
      font-size: 12px;
      font-weight: 700;
      padding: 6px 13px;
      border-radius: 8px;
      cursor: pointer;
      border: 1.5px solid var(--border);
      background: var(--glass);
      color: var(--text);
      backdrop-filter: blur(6px);
      transition: border-color 0.2s, color 0.2s;
      user-select: none;
    }

    .ctrl-btn:hover {
      border-color: var(--accent);
      color: var(--accent);
    }

    /* ===== HAMBURGER ===== */
    .hamburger {
      display: flex;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      width: 36px;
      height: 36px;
      cursor: pointer;
      padding: 4px;
      border-radius: 8px;
      border: 1.5px solid var(--border);
      background: var(--glass);
      transition: border-color 0.2s;
    }

    @media (min-width: 900px) {
      .hamburger {
        display: none;
      }
    }

    .hamburger span {
      display: block;
      height: 2px;
      background: var(--accent);
      border-radius: 2px;
      transition: transform 0.3s ease, opacity 0.3s ease;
    }

    .hamburger.open span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .hamburger.open span:nth-child(2) {
      opacity: 0;
    }

    .hamburger.open span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    /* ===== MOBILE DRAWER ===== */
    .mobile-drawer {
      position: fixed;
      inset: 0;
      top: 61px;
      background: rgba(5, 13, 20, 0.97);
      backdrop-filter: blur(18px);
      display: flex;
      flex-direction: column;
      padding: 28px 24px;
      gap: 8px;
      z-index: 99;
      transform: translateX(100%);
      transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
      border-left: 1px solid var(--border);
    }

    body.light .mobile-drawer {
      background: rgba(240, 244, 248, 0.97);
    }

    .mobile-drawer.open {
      transform: translateX(0);
    }

    .mobile-drawer a {
      font-family: var(--mono);
      font-size: 18px;
      color: var(--text);
      text-decoration: none;
      padding: 16px 20px;
      border-radius: var(--radius);
      border: 1px solid transparent;
      transition: color 0.2s, border-color 0.2s, background 0.2s;
    }

    .mobile-drawer a:hover,
    .mobile-drawer a.active {
      color: var(--accent);
      border-color: var(--border);
      background: var(--glass);
    }

    /* ===== MAIN ===== */
    main {
      position: relative;
      z-index: 2;
      max-width: 1080px;
      margin: 56px auto;
      padding: 0 24px 80px;
    }

    /* ===== PAGE HEADER ===== */
    .page-header {
      text-align: center;
      margin-bottom: 56px;
    }

    .page-header h1 {
      font-family: var(--mono);
      font-size: clamp(28px, 5vw, 46px);
      font-weight: 700;
      background: linear-gradient(135deg, var(--accent) 0%, var(--accent2) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 14px;
    }

    .page-header p {
      font-size: 15px;
      color: var(--muted);
      max-width: 480px;
      margin: 0 auto;
      line-height: 1.7;
    }

    /* ===== FILTER TABS ===== */
    .filter-tabs {
      display: flex;
      justify-content: center;
      gap: 10px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }

    .filter-btn {
      font-family: var(--mono);
      font-size: 12px;
      font-weight: 700;
      padding: 8px 20px;
      border-radius: 99px;
      border: 1.5px solid var(--border);
      background: var(--glass);
      color: var(--muted);
      cursor: pointer;
      transition: color 0.2s, border-color 0.2s, background 0.2s;
      letter-spacing: 0.5px;
      user-select: none;
    }

    .filter-btn:hover,
    .filter-btn.active {
      color: var(--accent);
      border-color: var(--accent);
      background: rgba(0, 255, 178, 0.06);
    }

    /* ===== PROJECT GRID ===== */
    .project-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
    }

    /* ===== PROJECT CARD ===== */
    .project-card {
      background: var(--glass);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      backdrop-filter: blur(14px);
      overflow: hidden;
      transition: transform 0.3s ease, box-shadow 0.3s ease, border-color 0.3s;
      animation: fadeInUp 0.6s ease both;
      cursor: pointer;
      display: flex;
      flex-direction: column;
    }

    .project-card:hover {
      transform: translateY(-6px);
      box-shadow: 0 20px 50px rgba(0, 255, 178, 0.12);
      border-color: rgba(0, 255, 178, 0.35);
    }

    .project-card:nth-child(1) {
      animation-delay: 0.05s;
    }

    .project-card:nth-child(2) {
      animation-delay: 0.1s;
    }

    .project-card:nth-child(3) {
      animation-delay: 0.15s;
    }

    .project-card:nth-child(4) {
      animation-delay: 0.2s;
    }

    .project-card:nth-child(5) {
      animation-delay: 0.25s;
    }

    .project-card:nth-child(6) {
      animation-delay: 0.3s;
    }

    /* ===== CARD IMAGE ===== */
    .card-img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .project-card:hover .card-img {
      transform: scale(1.04);
    }

    .card-img-placeholder {
      width: 100%;
      height: 180px;
      background: linear-gradient(135deg, rgba(0, 255, 178, 0.08), rgba(0, 201, 255, 0.08));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 48px;
      color: var(--accent);
      overflow: hidden;
      position: relative;
    }

    .card-img-placeholder::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, transparent 40%, rgba(0, 255, 178, 0.05));
    }

    /* ===== CARD BODY ===== */
    .card-body {
      padding: 22px 24px 24px;
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .card-tags {
      display: flex;
      gap: 6px;
      flex-wrap: wrap;
    }

    .tag {
      font-family: var(--mono);
      font-size: 10px;
      font-weight: 700;
      padding: 3px 10px;
      border-radius: 99px;
      border: 1px solid var(--border);
      color: var(--accent);
      background: rgba(0, 255, 178, 0.06);
      letter-spacing: 0.5px;
    }

    .card-title {
      font-family: var(--mono);
      font-size: 17px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.3;
    }

    .card-desc {
      font-size: 13.5px;
      color: var(--muted);
      line-height: 1.7;
      flex: 1;
    }

    /* ===== CARD FOOTER ===== */
    .card-footer {
      padding: 14px 24px;
      border-top: 1px solid var(--border);
      display: flex;
      gap: 10px;
      align-items: center;
    }

    .card-link {
      font-family: var(--mono);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.5px;
      text-decoration: none;
      padding: 7px 16px;
      border-radius: 8px;
      transition: transform 0.2s, box-shadow 0.2s, background 0.2s, color 0.2s;
    }

    .card-link.primary {
      background: var(--accent);
      color: #000;
    }

    .card-link.primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(0, 255, 178, 0.3);
    }

    .card-link.secondary {
      background: transparent;
      border: 1.5px solid var(--border);
      color: var(--muted);
    }

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

    /* ===== EMPTY STATE ===== */
    .empty-state {
      text-align: center;
      padding: 80px 20px;
      color: var(--muted);
      font-family: var(--mono);
      font-size: 14px;
      grid-column: 1/-1;
      display: none;
    }

    .empty-state.visible {
      display: block;
    }

    .empty-state-icon {
      font-size: 48px;
      margin-bottom: 16px;
      opacity: 0.4;
    }

    /* ===== FOOTER ===== */
    footer {
      position: relative;
      z-index: 2;
      text-align: center;
      padding: 28px 20px;
      font-family: var(--mono);
      font-size: 13px;
      color: var(--muted);
      border-top: 1px solid var(--border);
    }

    /* ===== ANIMATIONS ===== */
    @keyframes fadeInUp {
      from {
        opacity: 0;
        transform: translateY(24px);
      }

      to {
        opacity: 1;
        transform: translateY(0);
      }
    }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 600px) {
      header {
        padding: 12px 18px;
      }

      main {
        margin: 36px auto;
        padding: 0 14px 60px;
      }

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

      .card-img,
      .card-img-placeholder {
        height: 160px;
      }
    }