/* ===== CSS Reset & Custom Properties ===== */
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

    :root {
      /* Warm accent palette */
      --accent: #e07a3a;
      --accent-light: #f0a06a;
      --accent-dark: #c45e1f;
      --accent-glow: rgba(224, 122, 58, 0.15);
      --accent-glow-strong: rgba(224, 122, 58, 0.3);

      /* Light mode */
      --bg-primary: #faf9f7;
      --bg-secondary: #ffffff;
      --bg-tertiary: #f3f1ed;
      --text-primary: #1a1a1a;
      --text-secondary: #555555;
      --text-tertiary: #888888;
      --border: #e8e5e0;
      --border-light: #f0ede8;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.04);
      --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
      --shadow-lg: 0 8px 40px rgba(0,0,0,0.08);
      --nav-bg: rgba(250, 249, 247, 0.85);
      --code-bg: #f5f2ee;
      --tag-bg: #fdf0e6;
      --tag-text: #b35c1e;
      --scrollbar-thumb: #ccc;
      --card-hover-shadow: 0 8px 30px rgba(224, 122, 58, 0.1);
    }

    [data-theme="dark"] {
      --bg-primary: #111110;
      --bg-secondary: #1a1918;
      --bg-tertiary: #222120;
      --text-primary: #ede9e3;
      --text-secondary: #a09a90;
      --text-tertiary: #6b665e;
      --border: #2e2c28;
      --border-light: #252320;
      --shadow-sm: 0 1px 3px rgba(0,0,0,0.2);
      --shadow-md: 0 4px 20px rgba(0,0,0,0.3);
      --shadow-lg: 0 8px 40px rgba(0,0,0,0.4);
      --nav-bg: rgba(17, 17, 16, 0.9);
      --code-bg: #1e1d1b;
      --tag-bg: rgba(224, 122, 58, 0.12);
      --tag-text: #e8a06a;
      --scrollbar-thumb: #444;
      --card-hover-shadow: 0 8px 30px rgba(224, 122, 58, 0.08);
    }

    /* ===== Scrollbar ===== */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: transparent; }
    ::-webkit-scrollbar-thumb { background: var(--scrollbar-thumb); border-radius: 3px; }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: 80px;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
      background-color: var(--bg-primary);
      color: var(--text-primary);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
      transition: background-color 0.4s ease, color 0.4s ease;
      overflow-x: hidden;
    }

    /* ===== Animations ===== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(24px); }
      to { opacity: 1; transform: translateY(0); }
    }
    @keyframes fadeIn {
      from { opacity: 0; }
      to { opacity: 1; }
    }
    @keyframes slideInLeft {
      from { opacity: 0; transform: translateX(-20px); }
      to { opacity: 1; transform: translateX(0); }
    }
    @keyframes pulse-dot {
      0%, 100% { transform: scale(1); opacity: 1; }
      50% { transform: scale(1.6); opacity: 0.5; }
    }
    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-6px); }
    }
    @keyframes draw-line {
      from { width: 0; }
      to { width: 48px; }
    }
    @keyframes scale-in {
      from { opacity: 0; transform: scale(0.9); }
      to { opacity: 1; transform: scale(1); }
    }

    .animate-on-scroll {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
                  transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .animate-on-scroll.is-visible {
      opacity: 1;
      transform: translateY(0);
    }
    .animate-on-scroll.is-visible:nth-child(2) { transition-delay: 0.1s; }
    .animate-on-scroll.is-visible:nth-child(3) { transition-delay: 0.2s; }
    .animate-on-scroll.is-visible:nth-child(4) { transition-delay: 0.3s; }

    /* ===== Layout ===== */
    .container {
      max-width: 1080px;
      margin: 0 auto;
      padding: 0 24px;
    }

    section {
      padding: 100px 0;
    }

    /* ===== Navigation ===== */
    .nav {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: var(--nav-bg);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-light);
      transition: all 0.3s ease;
    }
    .nav.scrolled {
      box-shadow: var(--shadow-sm);
    }
    .nav-inner {
      max-width: 1080px;
      margin: 0 auto;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
    }
    .nav-logo {
      font-weight: 700;
      font-size: 1.15rem;
      color: var(--text-primary);
      text-decoration: none;
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
      transition: color 0.2s;
    }
    .nav-logo:hover { color: var(--accent); }
    .nav-logo-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: var(--accent);
      display: inline-block;
      animation: pulse-dot 2.5s ease-in-out infinite;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 8px;
      list-style: none;
    }
    .nav-links a {
      text-decoration: none;
      color: var(--text-secondary);
      font-size: 0.875rem;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: 8px;
      transition: all 0.25s ease;
      position: relative;
    }
    .nav-links a:hover,
    .nav-links a.active {
      color: var(--accent);
      background: var(--accent-glow);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 6px;
    }
    .theme-toggle {
      background: none;
      border: 1px solid var(--border);
      color: var(--text-secondary);
      cursor: pointer;
      width: 38px;
      height: 38px;
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all 0.25s ease;
      font-size: 1.1rem;
    }
    .theme-toggle:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--accent-glow);
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      color: var(--text-primary);
      cursor: pointer;
      width: 38px;
      height: 38px;
      align-items: center;
      justify-content: center;
      flex-direction: column;
      gap: 5px;
      border-radius: 10px;
    }
    .mobile-toggle span {
      display: block;
      width: 20px;
      height: 2px;
      background: var(--text-primary);
      border-radius: 2px;
      transition: all 0.3s ease;
    }
    .mobile-toggle.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .mobile-toggle.open span:nth-child(2) { opacity: 0; }
    .mobile-toggle.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

    /* Mobile Nav */
    .mobile-menu {
      display: none;
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      bottom: 0;
      background: var(--bg-primary);
      z-index: 999;
      padding: 32px 24px;
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .mobile-menu.open {
      opacity: 1;
    }
    .mobile-menu a {
      display: block;
      text-decoration: none;
      color: var(--text-primary);
      font-size: 1.25rem;
      font-weight: 500;
      padding: 16px 0;
      border-bottom: 1px solid var(--border-light);
      transition: color 0.2s;
    }
    .mobile-menu a:hover { color: var(--accent); }

    /* ===== Hero ===== */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      padding-top: 64px;
    }
    .hero-content {
      animation: fadeInUp 0.8s cubic-bezier(0.22, 1, 0.36, 1) forwards;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent-glow);
      color: var(--accent);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 100px;
      margin-bottom: 28px;
      letter-spacing: 0.5px;
      text-transform: uppercase;
    }
    .hero-badge-dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: #4ade80;
      animation: pulse-dot 2s ease-in-out infinite;
    }
    .hero h1 {
      font-size: clamp(2.4rem, 5.5vw, 4rem);
      font-weight: 700;
      line-height: 1.1;
      letter-spacing: -1.5px;
      margin-bottom: 24px;
      color: var(--text-primary);
    }
    .hero h1 .accent { color: var(--accent); }
    .hero-description {
      font-size: clamp(1.05rem, 2vw, 1.2rem);
      color: var(--text-secondary);
      max-width: 560px;
      line-height: 1.8;
      margin-bottom: 40px;
    }
    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
      margin-bottom: 56px;
    }
    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent);
      color: #fff;
      text-decoration: none;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 13px 28px;
      border-radius: 12px;
      border: none;
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
      box-shadow: 0 2px 12px rgba(224, 122, 58, 0.25);
    }
    .btn-primary:hover:not(:disabled) {
      background: var(--accent-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 24px rgba(224, 122, 58, 0.35);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: transparent;
      color: var(--text-primary);
      text-decoration: none;
      font-weight: 600;
      font-size: 0.9rem;
      padding: 13px 28px;
      border-radius: 12px;
      border: 1px solid var(--border);
      cursor: pointer;
      transition: all 0.3s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .btn-secondary:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--accent-glow);
      transform: translateY(-2px);
    }
    .hero-stats {
      display: flex;
      gap: 48px;
    }
    .hero-stat {
      text-align: left;
    }
    .hero-stat-number {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-primary);
      letter-spacing: -1px;
    }
    .hero-stat-label {
      font-size: 0.8rem;
      color: var(--text-tertiary);
      font-weight: 500;
      margin-top: 2px;
    }

    /* ===== Section Headers ===== */
    .section-header {
      margin-bottom: 56px;
    }
    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 14px;
    }
    .section-title {
      font-size: clamp(1.8rem, 3.5vw, 2.4rem);
      font-weight: 700;
      letter-spacing: -1px;
      line-height: 1.2;
      color: var(--text-primary);
      margin-bottom: 12px;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 520px;
      line-height: 1.7;
    }

    /* ===== About ===== */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: start;
    }
    .about-text p {
      color: var(--text-secondary);
      font-size: 1.02rem;
      line-height: 1.85;
      margin-bottom: 24px;
    }
    .about-details {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 32px;
    }
    .about-detail {
      padding: 18px 20px;
      background: var(--bg-secondary);
      border: 1px solid var(--border-light);
      border-radius: 12px;
      transition: all 0.3s ease;
    }
    .about-detail:hover {
      border-color: var(--accent);
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-2px);
    }
    .about-detail-label {
      font-size: 0.72rem;
      font-weight: 600;
      color: var(--text-tertiary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 4px;
    }
    .about-detail-value {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-primary);
    }
    .about-certs {
      margin-top: 36px;
    }
    .about-certs h3 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 16px;
    }
    .cert-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 14px 0;
      border-bottom: 1px solid var(--border-light);
    }
    .cert-item:last-child { border-bottom: none; }
    .cert-icon {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      background: var(--accent-glow);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 0.85rem;
      flex-shrink: 0;
      margin-top: 2px;
    }
    .cert-info-name {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-primary);
    }
    .cert-info-meta {
      font-size: 0.78rem;
      color: var(--text-tertiary);
      margin-top: 2px;
    }

    /* ===== Skills ===== */
    #skills { background: var(--bg-secondary); }
    .skills-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
    }
    .skill-card {
      padding: 28px;
      background: var(--bg-primary);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .skill-card:hover {
      border-color: var(--accent);
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    .skill-card-header {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 18px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .skill-card-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--accent-glow);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
    }
    .skill-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .skill-tag {
      font-size: 0.8rem;
      font-weight: 500;
      color: var(--tag-text);
      background: var(--tag-bg);
      padding: 5px 13px;
      border-radius: 8px;
      transition: all 0.25s ease;
    }
    .skill-tag:hover {
      background: var(--accent);
      color: #fff;
      transform: scale(1.05);
    }

    /* ===== Experience ===== */
    .timeline {
      position: relative;
      padding-left: 32px;
    }
    .timeline::before {
      content: '';
      position: absolute;
      left: 0;
      top: 8px;
      bottom: 8px;
      width: 2px;
      background: var(--border);
      border-radius: 1px;
    }
    .timeline-item {
      position: relative;
      padding-bottom: 48px;
    }
    .timeline-item:last-child { padding-bottom: 0; }
    .timeline-dot {
      position: absolute;
      left: -37px;
      top: 6px;
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: var(--bg-primary);
      border: 3px solid var(--accent);
      transition: all 0.3s ease;
    }
    .timeline-item:hover .timeline-dot {
      background: var(--accent);
      box-shadow: 0 0 0 4px var(--accent-glow-strong);
    }
    .timeline-period {
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 6px;
      letter-spacing: 0.5px;
    }
    .timeline-role {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 4px;
    }
    .timeline-company {
      font-size: 0.9rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .timeline-desc {
      font-size: 0.92rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 14px;
    }
    .timeline-highlights {
      list-style: none;
    }
    .timeline-highlights li {
      position: relative;
      padding-left: 20px;
      font-size: 0.88rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 6px;
    }
    .timeline-highlights li::before {
      content: '▸';
      position: absolute;
      left: 0;
      color: var(--accent);
      font-weight: 700;
    }

    /* ===== Projects ===== */
    #projects { background: var(--bg-secondary); }
    .projects-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }
    .project-card {
      background: var(--bg-primary);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 32px;
      transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
      display: flex;
      flex-direction: column;
      position: relative;
      overflow: hidden;
    }
    .project-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, var(--accent), var(--accent-light));
      opacity: 0;
      transition: opacity 0.3s ease;
    }
    .project-card:hover::before { opacity: 1; }
    .project-card:hover {
      border-color: var(--accent);
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-4px);
    }
    .project-featured-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 0.68rem;
      font-weight: 700;
      color: var(--accent);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 12px;
    }
    .project-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 10px;
    }
    .project-desc {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 20px;
      flex: 1;
    }
    .project-tech {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
      margin-bottom: 20px;
    }
    .project-tech span {
      font-family: 'JetBrains Mono', monospace;
      font-size: 0.72rem;
      font-weight: 500;
      color: var(--text-tertiary);
      background: var(--code-bg);
      padding: 4px 10px;
      border-radius: 6px;
    }
    .project-links {
      display: flex;
      gap: 16px;
    }
    .project-links a {
      font-size: 0.82rem;
      font-weight: 600;
      color: var(--text-secondary);
      text-decoration: none;
      display: flex;
      align-items: center;
      gap: 6px;
      transition: color 0.2s;
    }
    .project-links a:hover { color: var(--accent); }

    /* ===== Testimonials ===== */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
      gap: 24px;
    }
    .testimonial-card {
      background: var(--bg-secondary);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 32px;
      transition: all 0.35s cubic-bezier(0.22, 1, 0.36, 1);
      position: relative;
    }
    .testimonial-card:hover {
      border-color: var(--accent);
      box-shadow: var(--card-hover-shadow);
      transform: translateY(-3px);
    }
    .testimonial-quote-icon {
      font-size: 2rem;
      color: var(--accent);
      opacity: 0.3;
      margin-bottom: 12px;
      line-height: 1;
    }
    .testimonial-text {
      font-size: 0.95rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 24px;
      font-style: italic;
    }
    .testimonial-author {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--text-primary);
    }
    .testimonial-role {
      font-size: 0.78rem;
      color: var(--text-tertiary);
      margin-top: 2px;
    }

    /* ===== Education ===== */
    #education { background: var(--bg-secondary); }
    .edu-card {
      background: var(--bg-primary);
      border: 1px solid var(--border-light);
      border-radius: 16px;
      padding: 32px;
      max-width: 600px;
      transition: all 0.3s ease;
    }
    .edu-card:hover {
      border-color: var(--accent);
      box-shadow: var(--card-hover-shadow);
    }
    .edu-period {
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--accent);
      margin-bottom: 8px;
    }
    .edu-degree {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 4px;
    }
    .edu-institution {
      font-size: 0.92rem;
      color: var(--text-secondary);
      margin-bottom: 12px;
    }
    .edu-desc {
      font-size: 0.88rem;
      color: var(--text-tertiary);
      line-height: 1.7;
    }

    /* ===== Contact ===== */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: start;
    }
    .contact-text p {
      color: var(--text-secondary);
      font-size: 1rem;
      line-height: 1.8;
      margin-bottom: 32px;
    }
    .contact-info-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 0;
    }
    .contact-info-icon {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: var(--accent-glow);
      color: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .contact-info-label {
      font-size: 0.72rem;
      font-weight: 600;
      color: var(--text-tertiary);
      text-transform: uppercase;
      letter-spacing: 0.8px;
    }
    .contact-info-value {
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-primary);
    }
    .contact-info-value a {
      color: var(--text-primary);
      text-decoration: none;
      transition: color 0.2s;
    }
    .contact-info-value a:hover { color: var(--accent); }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 18px;
      transition: all .3s ease;
    }
    .form-group { position: relative; }
    .form-group label {
      display: block;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--text-secondary);
      margin-bottom: 6px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .form-group input,
    .form-group textarea {
      width: 100%;
      padding: 13px 16px;
      background: var(--bg-secondary);
      border: 1px solid var(--border);
      border-radius: 12px;
      color: var(--text-primary);
      font-family: inherit;
      font-size: 0.92rem;
      outline: none;
      transition: all 0.25s ease;
      resize: none;
    }
    @keyframes successPop {
    0% { transform: scale(1); }
    40% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.btn-primary.success {
    animation: successPop .35s ease;
}
   .form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px rgba(224,122,58,.18);
}
    .form-group textarea { min-height: 130px; }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .social-links {
      display: flex;
      gap: 10px;
      margin-top: 20px;
    }
    .social-link {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      border: 1px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--text-secondary);
      text-decoration: none;
      font-size: 1.1rem;
      transition: all 0.25s ease;
    }
    .social-link:hover {
      border-color: var(--accent);
      color: var(--accent);
      background: var(--accent-glow);
      transform: translateY(-3px);
    }

    /* ===== Footer ===== */
    .footer {
      padding: 32px 0;
      border-top: 1px solid var(--border-light);
      text-align: center;
    }
    .footer p {
      font-size: 0.82rem;
      color: var(--text-tertiary);
    }
    .footer a {
      color: var(--accent);
      text-decoration: none;
    }

    /* ===== Scroll-to-top ===== */
    .scroll-top {
      position: fixed;
      bottom: 28px;
      right: 28px;
      width: 44px;
      height: 44px;
      border-radius: 12px;
      background: var(--accent);
      color: #fff;
      border: none;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: all 0.3s ease;
      box-shadow: 0 4px 16px rgba(224, 122, 58, 0.3);
      z-index: 900;
    }
    .scroll-top.visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .scroll-top:hover {
      background: var(--accent-dark);
      transform: translateY(-3px);
    }

    /* ===== Skip to content (a11y) ===== */
    .skip-link {
      position: absolute;
      top: -100%;
      left: 16px;
      z-index: 9999;
      padding: 12px 24px;
      background: var(--accent);
      color: #fff;
      border-radius: 0 0 8px 8px;
      font-weight: 600;
      font-size: 0.9rem;
      text-decoration: none;
      transition: top 0.2s;
    }
    .skip-link:focus { top: 0; }

    /* ===== Responsive ===== */
    @media (max-width: 900px) {
      .about-grid,
      .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
      }
      .hero-stats { gap: 32px; }
    }

    @media (max-width: 768px) {
      section { padding: 72px 0; }

      .nav-links { display: none; }
      .mobile-toggle { display: flex; }
      .mobile-menu { display: block; pointer-events: none; }
      .mobile-menu.open { pointer-events: all; }

      .hero h1 { font-size: 2.2rem; letter-spacing: -1px; }
      .hero-stats { flex-wrap: wrap; gap: 24px; }

      .about-details { grid-template-columns: 1fr; }

      .skills-grid { grid-template-columns: 1fr; }
      .projects-grid { grid-template-columns: 1fr; }
      .testimonials-grid { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }

      .timeline { padding-left: 24px; }
      .timeline-dot { left: -29px; }
    }

    @media (max-width: 480px) {
      .container { padding: 0 18px; }
      section { padding: 56px 0; }
      .hero h1 { font-size: 1.9rem; }
      .project-card { padding: 24px; }
      .testimonial-card { padding: 24px; }
    }

    /* ===== Focus styles ===== */
    :focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
      border-radius: 4px;
    }

    /* Reduced motion */
    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
      }
      html { scroll-behavior: auto; }
    }
 .btn-primary:disabled {
    opacity: .75;
    cursor: not-allowed;
    pointer-events: none;
}
.btn-primary.success {
    background: #16a34a !important;
    border-color: #16a34a;
}
.btn-primary.error {
    background: #dc2626 !important;
    border-color: #dc2626;
}
.contact-status {
    margin-top: 15px;
    font-size: 14px;
    font-weight: 600;
}

.contact-status.success {
    color: #16a34a;
}

.contact-status.error {
    color: #dc2626;
}