body {
            font-family: "Inter", sans-serif;
            background-color: #ffffff;
            color: #0a1929;
            line-height: 1.5;
            overflow-x: hidden;
        }

        :root {
            --accent: #a80614;
            --accent-glow: #1e0558;
            --gray-muted: #f5f7fa;
            --text-dark: #101820;
        }

        html { scroll-behavior: smooth; }

        /* ===== NAVBAR ===== */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(255,255,255,0.85);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            box-shadow: 0 1px 0 rgba(10,102,194,0.12);
            z-index: 1000;
            padding: 0.9rem 2rem;
        }

        .nav-container {
            max-width: 1400px;
            margin: 0 auto;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .logo a {
            font-weight: 700;
            font-size: 1.6rem;
            letter-spacing: -0.02em;
            text-decoration: none;
            background: linear-gradient(135deg, var(--accent) 0%, #1e3a8a 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            gap: 2.2rem;
            align-items: center;
        }

        .nav-item button {
            background: none;
            border: none;
            font-size: 0.95rem;
            font-weight: 500;
            color: #1e293b;
            cursor: pointer;
            padding: 0.4rem 0;
            transition: color 0.2s;
            font-family: 'Inter', sans-serif;
            position: relative;
        }

        .nav-item button::after {
            content: '';
            position: absolute;
            bottom: 0; left: 0;
            width: 0; height: 2px;
            background: var(--accent);
            transition: width 0.25s ease;
        }

        .nav-item button:hover { color: var(--accent); }
        .nav-item button:hover::after { width: 100%; }

        /* ===== HAMBURGER ===== */
        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            background: none;
            border: none;
            cursor: pointer;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 5px;
            z-index: 1100;
            position: relative;
        }

        .hamburger-line {
            display: block;
            width: 24px;
            height: 2px;
            background: #0a1929;
            border-radius: 2px;
            transition: all 0.35s cubic-bezier(0.23, 1, 0.32, 1);
            transform-origin: center;
        }

        .menu-toggle.is-open .hamburger-line:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
            background: white;
        }
        .menu-toggle.is-open .hamburger-line:nth-child(2) {
            opacity: 0;
            transform: scaleX(0);
        }
        .menu-toggle.is-open .hamburger-line:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
            background: white;
        }

        /* ===== MOBILE OVERLAY MENU ===== */
        .mobile-menu-overlay {
            position: fixed;
            inset: 0;
            z-index: 1050;
            pointer-events: none;
            opacity: 0;
            transition: opacity 0.4s ease;
        }

        .mobile-menu-overlay.is-open {
            opacity: 1;
            pointer-events: all;
        }

        .mobile-menu-backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0,20,60,0.55);
            backdrop-filter: blur(4px);
        }

        .mobile-menu-panel {
            position: absolute;
            top: 0; right: 0;
            width: min(320px, 85vw);
            height: 100%;
            background: linear-gradient(160deg, #002355 0%, #0a1929 60%, #001a45 100%);
            transform: translateX(100%);
            transition: transform 0.45s cubic-bezier(0.23, 1, 0.32, 1);
            display: flex;
            flex-direction: column;
            padding: 6rem 2.5rem 3rem;
            overflow: hidden;
        }

        .mobile-menu-panel::before {
            content: '';
            position: absolute;
            top: -80px; right: -80px;
            width: 260px; height: 260px;
            background: radial-gradient(circle, rgba(59,130,246,0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .mobile-menu-overlay.is-open .mobile-menu-panel {
            transform: translateX(0);
        }

        .mobile-nav-item {
            opacity: 0;
            transform: translateX(30px);
            transition: opacity 0.35s ease, transform 0.35s ease;
        }

        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(1) { opacity: 1; transform: none; transition-delay: 0.15s; }
        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(2) { opacity: 1; transform: none; transition-delay: 0.2s; }
        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(3) { opacity: 1; transform: none; transition-delay: 0.25s; }
        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(4) { opacity: 1; transform: none; transition-delay: 0.3s; }
        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(5) { opacity: 1; transform: none; transition-delay: 0.35s; }
        .mobile-menu-overlay.is-open .mobile-nav-item:nth-child(6) { opacity: 1; transform: none; transition-delay: 0.4s; }

        .mobile-nav-item button {
            background: none;
            border: none;
            font-family: 'Inter', sans-serif;
            font-size: 1.6rem;
            font-weight: 600;
            color: rgba(255,255,255,0.85);
            cursor: pointer;
            padding: 0.75rem 0;
            width: 100%;
            text-align: left;
            transition: color 0.2s, padding-left 0.2s;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            letter-spacing: -0.02em;
        }

        .mobile-nav-item:last-child button { border-bottom: none; }

        .mobile-nav-item button:hover {
            color: #60a5fa;
            padding-left: 8px;
        }

        .mobile-menu-socials {
            margin-top: auto;
            display: flex;
            gap: 1.2rem;
            opacity: 0;
            transition: opacity 0.4s 0.5s ease;
        }

        .mobile-menu-overlay.is-open .mobile-menu-socials { opacity: 1; }

        .mobile-menu-socials a {
            width: 42px; height: 42px;
            border-radius: 12px;
            background: rgba(255,255,255,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.1rem;
            text-decoration: none;
            transition: background 0.2s;
        }

        .mobile-menu-socials a:hover { background: var(--accent); }

        /* ===== MAIN ===== */
        main { margin-top: 74px; }

        /* ===== HERO — full-width fix ===== */
        .hero {
            position: relative;
            min-height: calc(100vh - 74px);
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 4rem 1.5rem;
            overflow: hidden;
            background-color: #002355;
            /* full bleed */
            width: 100vw;
            margin-left: calc(-50vw + 50%);
            left: 0;
        }

        #particles-js {
            position: absolute;
            inset: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
            background-color: #002355;
        }

        .hero-content {
            position: relative;
            z-index: 10;
            max-width: 860px;
            width: 100%;
            margin: 0 auto;
            text-align: center;
            color: white;
            background: rgba(0,35,85,0.35);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-radius: 40px;
            padding: 3.5rem 4rem;
            border: 1px solid rgba(255,255,255,0.2);
            box-shadow: 0 30px 60px -10px rgba(0,0,0,0.35);
        }

        .hero h1 {
            font-size: clamp(2.4rem, 8vw, 5rem);
            font-weight: 700;
            letter-spacing: -0.03em;
            line-height: 1.05;
            margin-bottom: 0.8rem;
            color: white;
        }

        .hero h2 {
            font-size: clamp(1.1rem, 3vw, 1.8rem);
            font-weight: 400;
            color: rgba(255,255,255,0.85);
            margin-bottom: 2.5rem;
        }

        .resume-buttons {
            display: flex;
            gap: 1rem;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn {
            background: white;
            border: 1px solid rgba(255,255,255,0.5);
            padding: 0.8rem 1.8rem;
            border-radius: 60px;
            font-weight: 600;
            font-size: 1rem;
            color: #002355;
            cursor: pointer;
            transition: all 0.22s ease;
            box-shadow: 0 8px 20px rgba(0,0,0,0.15);
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
        }

        .btn:hover {
            transform: translateY(-4px);
            background: var(--accent);
            color: white;
            border-color: var(--accent);
        }

        /* ===== SECTIONS ===== */
        section:not(.hero) {
            padding: 5rem 2rem;
            max-width: 1400px;
            margin: 0 auto;
        }

        .section-title {
            font-size: clamp(2rem, 5vw, 3rem);
            font-weight: 600;
            margin-bottom: 3rem;
            letter-spacing: -0.02em;
        }
        .section-title span {
            color: var(--accent);
            border-bottom: 4px solid var(--accent);
            padding-bottom: 4px;
        }

        /* ===== ABOUT ===== */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }

        .stat-item {
            background: var(--gray-muted);
            border-radius: 2rem;
            padding: 2rem;
            border-left: 8px solid var(--accent);
            margin-bottom: 2rem;
        }

        .stat-item .big-number {
            font-size: 3.5rem;
            font-weight: 700;
            color: var(--accent);
            line-height: 1;
        }

        .stat-item p { font-size: 1.1rem; }

        .tech-summary {
            margin-top: 2rem;
            background: #f0f4fe;
            padding: 1.6rem;
            border-radius: 24px;
            font-size: 1rem;
            border: 1px dashed var(--accent);
        }

        .about-photo img {
            width: 100%;
            max-width: 460px;
            border-radius: 40% 60% 30% 70% / 50% 40% 60% 50%;
            object-fit: cover;
            box-shadow: 0 25px 40px -10px rgba(10,102,194,0.3);
            border: 3px solid white;
            transition: border-radius 1s ease;
        }

        .about-photo:hover img {
            border-radius: 60% 40% 70% 30% / 40% 60% 40% 60%;
        }

        /* ===== FLIP CARDS ===== */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 2rem;
        }

        .flip-card {
            background-color: transparent;
            height: 340px;
            perspective: 2000px;
            cursor: pointer;
        }

        .flip-inner {
            position: relative;
            width: 100%;
            height: 100%;
            transition: transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
            transform-style: preserve-3d;
            border-radius: 28px;
            box-shadow: 0 12px 24px -8px rgba(0,0,0,0.12);
        }

        /* Touch support: flip on click */
        .flip-card.is-flipped .flip-inner { transform: rotateY(180deg); }
        @media (hover: hover) {
            .flip-card:hover .flip-inner { transform: rotateY(180deg); }
        }

        .flip-front, .flip-back {
            position: absolute;
            width: 100%;
            height: 100%;
            backface-visibility: hidden;
            -webkit-backface-visibility: hidden;
            border-radius: 28px;
            padding: 2rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            background-size: cover;
            background-position: center;
            color: white;
        }

        .flip-front {
            background-blend-mode: overlay;
            background-color: rgba(0,40,80,0.7);
            font-weight: 700;
            font-size: 1.6rem;
        }

        .flip-back {
            background: rgba(255,255,255,0.98);
            color: #0a1929;
            transform: rotateY(180deg);
            border: 2px solid var(--accent);
            justify-content: center;
            gap: 1.5rem;
        }

        .flip-back p { font-size: 1rem; line-height: 1.6; }

        .btn-small {
            background: var(--accent);
            color: white;
            padding: 0.65rem 1.6rem;
            border-radius: 40px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: 0.2s;
            border: none;
            cursor: pointer;
        }

        .btn-small:hover { background: #1e3a8a; }

        .case1 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/20/400/300'); }
        .case2 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/21/400/300'); }
        .case3 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/22/400/300'); }
        .case4 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/23/400/300'); }
        .case5 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/24/400/300'); }
        .case6 { background-image: linear-gradient(0deg, rgba(0,50,100,0.6), rgba(0,20,50,0.6)), url('https://picsum.photos/id/25/400/300'); }

        /* freelance variant */
        .freelance-grid .flip-card { height: 320px; }
        .freelance-grid .flip-inner { border-radius: 20px 50px 20px 50px; }
        .freelance-grid .flip-front { border-radius: 20px 50px 20px 50px; background-color: rgba(15,20,60,0.72); }
        .freelance-grid .flip-back { border-radius: 20px 50px 20px 50px; background: rgba(248,250,255,0.99); }

        /* ===== STACK ===== */
        .stack-section {
            background: var(--gray-muted);
            border-radius: 60px 20px 60px 20px;
            padding: 4rem;
        }

        .skill-group { margin-bottom: 2.5rem; }
        .skill-group h3 { font-size: 1.5rem; font-weight: 500; margin-bottom: 1rem; }

        .skill-bars { display: flex; flex-direction: column; gap: 1.4rem; }

        .skill-item { display: flex; flex-direction: column; gap: 0.4rem; }

        .skill-label {
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            font-size: 0.95rem;
        }

        .skill-label span:last-child { color: var(--accent); font-weight: 700; }

        .bar-bg {
            height: 10px;
            background: rgba(10,102,194,0.1);
            border-radius: 30px;
            overflow: hidden;
        }

        .bar-fill {
            height: 10px;
            background: linear-gradient(90deg, var(--accent), #3b82f6);
            width: 0%;
            border-radius: 30px;
            transition: none;
        }

        /* ===== CONTACTS ===== */
        .contact-flex {
            display: flex;
            gap: 1.5rem;
            flex-wrap: wrap;
            justify-content: center;
            margin: 3rem 0;
        }

        .contact-card {
            background: white;
            padding: 2rem 2.5rem;
            border-radius: 36px;
            box-shadow: 0 16px 32px -8px rgba(0,0,0,0.06);
            border: 1px solid #eef2f6;
            transition: 0.22s;
            text-align: center;
            min-width: 180px;
        }

        .contact-card i { font-size: 2.2rem; color: var(--accent); margin-bottom: 0.8rem; display: block; }
        .contact-card:hover { border-color: var(--accent); transform: translateY(-4px); }

        .preferred {
            background: var(--accent);
            color: white;
            border-radius: 60px;
            padding: 0.2rem 1rem;
            font-size: 0.85rem;
            margin-top: 0.5rem;
            display: inline-block;
        }

        /* ===== FOOTER ===== */
        .footer {
            background: #0b1a2a;
            color: #ccc;
            padding: 3rem 2rem 1.5rem;
        }

        .footer-map {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
            gap: 2rem;
        }

        .footer-col p { font-weight: 600; color: white; margin-bottom: 1rem; }
        .footer-col ul { list-style: none; }
        .footer-col ul li { margin-bottom: 0.4rem; color: #a0b3cc; }

        .copyright { text-align: center; margin-top: 3rem; color: #5f7d9c; font-size: 0.9rem; }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 900px) {
            .nav-links { display: none; }
            .menu-toggle { display: flex; }

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

            .about-photo {
                display: flex;
                justify-content: center;
            }

            .about-photo img {
                max-width: 300px;
            }

            .hero-content {
                padding: 2.5rem 1.8rem;
                border-radius: 28px;
            }

            .stack-section {
                padding: 2.5rem 1.5rem;
                border-radius: 32px;
            }
        }

        @media (max-width: 600px) {
            section:not(.hero) {
                padding: 3.5rem 1rem;
            }

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

            .flip-card { height: 300px; }
            .freelance-grid .flip-card { height: 280px; }

            .hero-content {
                padding: 2rem 1.2rem;
                border-radius: 20px;
            }

            .btn { padding: 0.7rem 1.4rem; font-size: 0.9rem; }

            .contact-card { min-width: 140px; padding: 1.5rem 1.5rem; }

            .stat-item .big-number { font-size: 2.8rem; }
        }

        @media (max-width: 400px) {
            .resume-buttons { flex-direction: column; align-items: stretch; }
            .btn { justify-content: center; }
        }