/* --- CSS VARIABLES & RESET --- */
:root {
    --bg-main: #0F172A;
    --card-bg: #1E293B;
    --card-bg-hover: #253348;
    --accent-sky: #38BDF8;
    --accent-indigo: #6366F1;
    --text-main: #F8FAFC;
    --text-muted: #94A3B8;
    --border-color: rgba(255, 255, 255, 0.08);
    --transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* --- UTILITIES --- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

section {
    padding: 100px 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--text-main), var(--text-muted));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 12px;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 1.05rem;
}

/* --- BUTTONS --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-weight: 600;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 0.95rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-indigo), var(--accent-sky));
    color: #ffffff;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.3);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(99, 102, 241, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-sky);
    transform: translateY(-3px);
}

.btn-sm {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

.btn-outline {
    background: transparent;
    color: var(--accent-sky);
    border: 1px solid var(--accent-sky);
}

.btn-outline:hover {
    background: var(--accent-sky);
    color: var(--bg-main);
}

.btn-solid {
    background: var(--card-bg-hover);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-solid:hover {
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
}

.btn-block {
    width: 100%;
    justify-content: center;
}

/* --- NAVBAR --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
}

.nav-logo span {
    color: var(--accent-sky);
}

.nav-menu {
    display: flex;
    gap: 32px;
    align-items: center;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: var(--transition);
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--accent-sky);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-sky);
    transition: var(--transition);
}

.nav-link.active::after, .nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.hamburger .bar {
    width: 28px;
    height: 2px;
    background: var(--text-main);
    transition: var(--transition);
}

/* --- HERO SECTION --- */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 120px;
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.15) 0%, rgba(56, 189, 248, 0.05) 60%, transparent 100%);
    z-index: 0;
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 50px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-subtitle {
    color: var(--accent-sky);
    font-weight: 600;
    font-size: 1.1rem;
    display: block;
    margin-bottom: 8px;
}

.hero-title {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 3.8rem;
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 16px;
    background: linear-gradient(135deg, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-profession {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--accent-indigo);
    margin-bottom: 20px;
}

.cursor {
    animation: blink 0.8s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-desc {
    color: var(--text-muted);
    font-size: 1.05rem;
    margin-bottom: 35px;
    max-width: 540px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
}

.hero-image-wrapper {
    position: relative;
    display: flex;
    justify-content: center;
}

.image-frame {
    width: 360px;
    height: 360px;
    border-radius: 30px;
    overflow: hidden;
    border: 2px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4);
    background: var(--card-bg);
}

.image-frame img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.image-frame:hover img {
    transform: scale(1.05);
}

.floating-badge {
    position: absolute;
    background: rgba(30, 41, 59, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    padding: 12px 20px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    animation: float 4s ease-in-out infinite;
}

.floating-badge i {
    color: var(--accent-sky);
}

.badge-1 {
    top: 30px;
    left: -20px;
}

.badge-2 {
    bottom: 40px;
    right: -20px;
    animation-delay: 2s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* --- ABOUT SECTION --- */
.about-section {
    background: rgba(30, 41, 59, 0.2);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    align-items: center;
}

.about-img-box {
    width: 100%;
    height: 440px;
    border-radius: 24px;
    overflow: hidden;
    border: 1px solid var(--border-color);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.about-img-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.about-content h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.3;
}

.about-content p {
    color: var(--text-muted);
    margin-bottom: 16px;
    font-size: 1rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 20px;
    border-radius: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--accent-sky);
    transform: translateY(-4px);
}

.stat-card h4 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2rem;
    font-weight: 800;
    color: var(--accent-sky);
    margin-bottom: 4px;
}

.stat-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0;
}

/* --- SKILLS / CAROUSEL SECTION --- */
.skills-section {
    position: relative;
}

.carousel-container {
    position: relative;
    display: flex;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
}

.carousel-track-wrapper {
    overflow: hidden;
    width: 100%;
    padding: 20px 10px;
}

.carousel-track {
    display: flex;
    gap: 24px;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1);
}

.carousel-card {
    min-width: calc(33.333% - 16px);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 30px;
    transition: var(--transition);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.carousel-card:hover {
    border-color: var(--accent-indigo);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--accent-sky);
    margin-bottom: 20px;
}

.carousel-card h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.35rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.skill-level {
    display: inline-block;
    color: var(--accent-indigo);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 14px;
}

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

.carousel-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    flex-shrink: 0;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.carousel-btn:hover {
    background: var(--accent-indigo);
    border-color: var(--accent-indigo);
    color: #ffffff;
}

.prev-btn {
    margin-right: -24px;
}

.next-btn {
    margin-left: -24px;
}

/* --- PROJECTS SECTION --- */
.projects-section {
    background: rgba(30, 41, 59, 0.2);
}

.filter-container {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

.filter-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 10px 22px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--accent-indigo);
    color: #ffffff;
    border-color: var(--accent-indigo);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card.hide {
    display: none;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-sky);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.project-img {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.project-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-card:hover .project-img img {
    transform: scale(1.08);
}

.project-info {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    justify-content: space-between;
}

.project-info h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.project-info p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 16px;
}

.project-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.project-tags span {
    background: rgba(56, 189, 248, 0.1);
    color: var(--accent-sky);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 6px;
}

.project-actions {
    display: flex;
    gap: 10px;
}

/* --- CERTIFICATES SECTION --- */
.certificates-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.cert-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.cert-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent-indigo);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.cert-img {
    width: 100%;
    height: 180px;
    overflow: hidden;
    cursor: pointer;
}

.cert-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.cert-card:hover .cert-img img {
    transform: scale(1.05);
}

.cert-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
    justify-content: space-between;
}

.cert-info h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 6px;
}

.cert-org {
    color: var(--accent-sky);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.cert-year {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-bottom: 16px;
    display: block;
}

/* LIGHTBOX MODAL */
.lightbox-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(10px);
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.lightbox-modal.active {
    opacity: 1;
    pointer-events: auto;
}

.lightbox-content {
    max-width: 800px;
    width: 90%;
    text-align: center;
    position: relative;
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox-modal.active .lightbox-content {
    transform: scale(1);
}

.lightbox-content img {
    width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.5);
}

.lightbox-caption {
    margin-top: 16px;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    font-size: 2.5rem;
    color: var(--text-main);
    cursor: pointer;
    transition: var(--transition);
}

.lightbox-close:hover {
    color: var(--accent-sky);
}

/* --- CONTACT SECTION --- */
.contact-section {
    background: rgba(30, 41, 59, 0.2);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info-box h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 16px;
}

.contact-info-box p {
    color: var(--text-muted);
    margin-bottom: 30px;
}

.contact-channels {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.channel-item {
    display: flex;
    align-items: center;
    gap: 16px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 16px 20px;
    border-radius: 16px;
    text-decoration: none;
    color: var(--text-main);
    transition: var(--transition);
}

.channel-item:hover {
    border-color: var(--accent-sky);
    transform: translateX(6px);
}

.channel-item i {
    font-size: 1.5rem;
    color: var(--accent-sky);
    width: 40px;
    height: 40px;
    background: rgba(56, 189, 248, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
}

.channel-item span {
    font-size: 0.8rem;
    color: var(--text-muted);
    display: block;
}

.channel-item strong {
    font-size: 0.95rem;
}

.contact-form-box {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 40px;
    border-radius: 24px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    padding: 14px 16px;
    border-radius: 12px;
    color: var(--text-main);
    font-family: 'Inter', sans-serif;
    font-size: 0.95rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-sky);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.form-notification {
    margin-top: 16px;
    font-size: 0.9rem;
    font-weight: 600;
    text-align: center;
}

.form-notification.success {
    color: #34D399;
}

.form-notification.error {
    color: #F87171;
}

/* --- FOOTER --- */
.footer {
    background: #0B1120;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
}

.footer-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
}

.footer-left h3 {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 6px;
}

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

.footer-socials {
    display: flex;
    gap: 16px;
}

.footer-socials a {
    width: 40px;
    height: 40px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    text-decoration: none;
    transition: var(--transition);
}

.footer-socials a:hover {
    background: var(--accent-sky);
    color: var(--bg-main);
    border-color: var(--accent-sky);
    transform: translateY(-3px);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    width: 100%;
    padding-top: 20px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* --- BACK TO TOP --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 48px;
    height: 48px;
    background: var(--accent-indigo);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.4);
}

.back-to-top.active {
    opacity: 1;
    pointer-events: auto;
}

.back-to-top:hover {
    transform: translateY(-4px);
    background: var(--accent-sky);
}

/* --- RESPONSIVE DESIGN --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-desc {
        margin: 0 auto 35px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .hero-image-wrapper {
        margin-top: 20px;
    }

    .about-grid, .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

    .carousel-card {
        min-width: calc(50% - 12px);
    }
}

@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        flex-direction: column;
        background: rgba(15, 23, 42, 0.95);
        backdrop-filter: blur(16px);
        width: 100%;
        height: calc(100vh - 70px);
        justify-content: center;
        align-items: center;
        transition: var(--transition);
        border-bottom: 1px solid var(--border-color);
        gap: 24px;
    }

    .nav-menu.active {
        right: 0;
    }

    .hero-title {
        font-size: 2.8rem;
    }

    .image-frame {
        width: 280px;
        height: 280px;
    }

    .projects-grid, .certificates-grid {
        grid-template-columns: 1fr;
    }

    .carousel-card {
        min-width: 100%;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-buttons {
        flex-direction: column;
    }

    .contact-form-box {
        padding: 24px;
    }
}