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

:root {
    --bg: #060d18;
    --bg-elevated: #0c1526;
    --bg-card: #111827;
    --surface: #1a2332;
    --border: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(83, 143, 248, 0.4);

    --text: #e8edf5;
    --text-muted: #94a3b8;
    --text-subtle: #64748b;

    --accent: #538ff8;
    --accent-light: #7aabff;
    --accent-glow: rgba(83, 143, 248, 0.25);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 9999px;

    --shadow: 0 4px 24px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.45);

    --header-h: 72px;
    --container: 1140px;
    --transition: 250ms ease;
}

html {
    font-size: 62.5%;
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--header-h) + 2rem);
}

body {
    font-family: 'Inter', system-ui, sans-serif;
    font-size: 1.6rem;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
    background-image:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(83, 143, 248, 0.12), transparent),
        radial-gradient(ellipse 60% 40% at 100% 50%, rgba(83, 143, 248, 0.06), transparent);
    min-height: 100vh;
}

h1, h2, h3, h4 {
    font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

a {
    color: inherit;
}

/* ── Header ── */

.close-menu {
    display: none;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    height: var(--header-h);
    background: rgba(6, 13, 24, 0.82);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.header-inner {
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 2.4rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 2.2rem;
    font-weight: 800;
    text-decoration: none;
    color: var(--text);
    letter-spacing: -0.02em;
}

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

.nav-list {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    list-style: none;
}

.nav-list li a {
    display: block;
    padding: 0.8rem 1.4rem;
    font-size: 1.4rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: color var(--transition), background var(--transition);
}

.nav-list li a:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.06);
}

/* ── Buttons ── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1.2rem 2.4rem;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-primary {
    background: var(--accent);
    color: #fff;
    box-shadow: 0 4px 16px var(--accent-glow);
}

.btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--accent-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent-light);
    background: rgba(83, 143, 248, 0.08);
}

.btn-submit {
    width: 100%;
    font-size: 1.6rem;
    padding: 1.4rem 2.4rem;
}

/* ── Hero ── */

.hero {
    max-width: var(--container);
    margin: 0 auto;
    padding: calc(var(--header-h) + 6rem) 2.4rem 8rem;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1 1 42rem;
    max-width: 58rem;
}

.hero-badge {
    display: inline-block;
    padding: 0.6rem 1.4rem;
    margin-bottom: 2rem;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--accent-light);
    background: rgba(83, 143, 248, 0.12);
    border: 1px solid rgba(83, 143, 248, 0.25);
    border-radius: var(--radius-full);
}

.hero-title {
    font-size: clamp(3.2rem, 5vw, 5.2rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: 2rem;
}

.highlight {
    background: linear-gradient(135deg, var(--accent-light), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text {
    font-size: 1.8rem;
    color: var(--text-muted);
    max-width: 52rem;
    margin-bottom: 3.2rem;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 1.2rem;
}

.hero-image-wrap {
    flex: 0 1 32rem;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image {
    width: 28rem;
    height: 28rem;
    border-radius: 50%;
    background-image: url(../img/leoresize.jpeg);
    background-position: center;
    background-size: cover;
    position: relative;
    box-shadow: var(--shadow-lg);
}

.hero-image::before {
    content: '';
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    z-index: -1;
}

.hero-image::after {
    content: '';
    position: absolute;
    inset: -20px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow), transparent 70%);
    z-index: -2;
}

/* ── Section headers ── */

.section-header {
    text-align: center;
    max-width: 60rem;
    margin: 0 auto 5rem;
    padding: 0 2.4rem;
}

.section-label {
    display: inline-block;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 1.2rem;
}

.section-title {
    font-size: clamp(2.8rem, 4vw, 3.6rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 1.2rem;
}

.section-subtitle {
    font-size: 1.7rem;
    color: var(--text-muted);
}

/* ── Skills slider ── */

.skills {
    padding: 8rem 0 10rem;
    background: linear-gradient(180deg, transparent, rgba(12, 21, 38, 0.6) 50%, transparent);
}

.slider {
    width: 100%;
    height: var(--height);
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, #000 8% 92%, transparent);
    -webkit-mask-image: linear-gradient(to right, transparent, #000 8% 92%, transparent);
}

.slider .list {
    display: flex;
    width: 100%;
    min-width: calc(var(--width) * var(--quantity));
    position: relative;
}

.slider .list .item {
    width: var(--width);
    height: var(--height);
    position: absolute;
    left: 100%;
    animation: autoRun 18s linear infinite;
    transition: filter 0.4s;
    animation-delay: calc((18s / var(--quantity)) * (var(--position) - 1));
}

@keyframes autoRun {
    from { left: 100%; }
    to { left: calc(var(--width) * -1); }
}

.skill-border {
    width: calc(var(--width-card) + 8px);
    height: calc(var(--height-card) + 8px);
    background: linear-gradient(160deg, var(--accent), #3c67e3 50%, var(--bg-elevated));
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 1px;
}

.card {
    height: var(--height-card);
    width: var(--width-card);
    border-radius: calc(var(--radius-md) - 1px);
    background: var(--bg-card);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 2rem;
}

.card img {
    width: 100%;
    max-height: 7rem;
    object-fit: contain;
}

.skill-name {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-muted);
    text-align: center;
    line-height: 1.2;
}

.slider:hover .item {
    animation-play-state: paused !important;
    filter: grayscale(0.6) opacity(0.7);
}

.slider .item:hover {
    filter: grayscale(0) opacity(1);
}

/* ── Projects ── */

.projects-section {
    padding: 8rem 2.4rem 10rem;
    max-width: var(--container);
    margin: 0 auto;
}

.projects {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(28rem, 1fr));
    gap: 2.4rem;
}

.card-project {
    background-size: cover;
    background-position: center;
    min-height: 36rem;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.card-project:hover,
.card-project:focus-within {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-hover);
}

.card-1 { background-image: url(../img/blog.jpg); }
.card-2 { background-image: url(../img/dashboard.png); }
.card-3 { background-image: url(../img/youtube.png); }
.card-4 {
    background-image:
        url(../img/page.png);
}

.card-content {
    --padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--padding);
    background: linear-gradient(
        to top,
        rgba(6, 13, 24, 0.98) 0%,
        rgba(6, 13, 24, 0.85) 40%,
        transparent 100%
    );
}

@media (hover: hover) {
    .card-content {
        transform: translateY(calc(100% - 23rem));
        transition: transform 500ms ease;
    }

    .card-project:hover .card-content,
    .card-project:focus-within .card-content {
        transform: translateY(0);
    }

    .card-body,
    .button {
        opacity: 0;
        transition: opacity 400ms ease;
    }

    .card-project:hover .card-body,
    .card-project:focus-within .card-body,
    .card-project:hover .button,
    .card-project:focus-within .button {
        opacity: 1;
    }
}

.card-tag {
    display: inline-block;
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--accent-light);
    margin-bottom: 0.8rem;
    letter-spacing: 0.04em;
}

.card-title {
    position: relative;
    width: max-content;
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.card-title::after {
    content: '';
    position: absolute;
    height: 3px;
    background: var(--accent);
    left: 0;
    bottom: -4px;
    width: 100%;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 400ms ease;
    border-radius: 2px;
}

.card-project:hover .card-title::after,
.card-project:focus-within .card-title::after {
    transform: scaleX(1);
}

.card-body {
    font-size: 1.5rem;
    color: var(--text-muted);
    margin-bottom: 1.6rem;
}

.button {
    display: inline-block;
    width: max-content;
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.3rem;
    font-weight: 600;
    text-decoration: none;
    color: #fff;
    background: var(--accent);
    padding: 0.8em 1.6em;
    border-radius: var(--radius-sm);
    transition: background var(--transition), transform var(--transition);
}

.button:hover,
.button:focus {
    background: var(--accent-light);
    transform: translateY(-1px);
}

/* ── Project scroll animation ── */

.card-project {
    opacity: 0;
}

.card-project.visible {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(3rem);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-1.visible { animation-delay: 0s; }
.card-2.visible { animation-delay: 0.15s; }
.card-3.visible { animation-delay: 0.3s; }
.card-4.visible { animation-delay: 0.45s; }

/* ── Services ── */

.services {
    padding: 8rem 2.4rem 10rem;
    max-width: var(--container);
    margin: 0 auto;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(28rem, 1fr));
    gap: 2rem;
}

.service-card {
    padding: 3rem 2.4rem;
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.service-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow);
}

.service-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 5.2rem;
    height: 5.2rem;
    margin-bottom: 2rem;
    font-size: 2.2rem;
    background: rgba(83, 143, 248, 0.12);
    border: 1px solid rgba(83, 143, 248, 0.2);
    border-radius: var(--radius-md);
    color: var(--accent-light);
}

.service-title {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
}

.service-text {
    font-size: 1.5rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* ── Contact ── */

.contact {
    padding: 8rem 2.4rem 10rem;
    max-width: 72rem;
    margin: 0 auto;
}

.contact-form {
    background: var(--bg-elevated);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3.2rem;
}

.contact-form .form-grid {
    border: none;
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
}

.form-grid legend {
    width: 100%;
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--text-subtle);
    margin-bottom: 1rem;
    padding: 0;
}

.form-group {
    flex: 1 1 28rem;
}

.form-group.full-width {
    flex: 1 1 100%;
}

.form-group label {
    display: block;
    margin-bottom: 0.8rem;
    font-size: 1.4rem;
    font-weight: 500;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1.4rem 1.6rem;
    font-family: inherit;
    font-size: 1.5rem;
    color: var(--text);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-subtle);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group textarea {
    resize: vertical;
    min-height: 12rem;
}

/* ── Footer ── */

.footer {
    border-top: 1px solid var(--border);
    background: var(--bg-elevated);
    padding: 3.2rem 2.4rem;
}

.footer-inner {
    max-width: var(--container);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.6rem;
}

.footer-copy {
    font-size: 1.4rem;
    color: var(--text-subtle);
}

.footer-links {
    display: flex;
    gap: 2.4rem;
}

.link-footer {
    font-family: 'Plus Jakarta Sans', sans-serif;
    font-size: 1.4rem;
    font-weight: 600;
    text-decoration: none;
    color: var(--text-muted);
    transition: color var(--transition);
}

.link-footer:hover {
    color: var(--accent-light);
}

/* ── Mobile menu ── */

.close-menu-label {
    display: none;
}

@media (max-width: 900px) {
    .header-inner {
        position: relative;
        z-index: 160;
    }

    .close-menu-label {
        display: flex;
        align-items: center;
        justify-content: center;
        position: fixed;
        top: 1.4rem;
        right: 1.6rem;
        z-index: 220;
        width: 4.4rem;
        height: 4.4rem;
        background: var(--bg-card);
        color: var(--text);
        font-size: 2.4rem;
        line-height: 1;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border);
        cursor: pointer;
    }

    .close-menu-label::after {
        content: '☰';
    }

    .header-inner nav {
        position: fixed;
        inset: 0;
        z-index: 200;
        display: flex;
        /* align-items: center; */
        justify-content: center;
        background: rgba(6, 13, 24, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        opacity: 0;
        visibility: hidden;
        pointer-events: none;
        transition: opacity var(--transition), visibility var(--transition);
        /* overflow-y: auto; */
    }

    .header.is-menu-open .header-inner nav,
    .header:has(#close-menu:checked) .header-inner nav {
        opacity: 1;
        visibility: visible;
        pointer-events: auto;
    }

    .header-inner .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 0.4rem;
        padding: 6rem 2.4rem;
        width: 100%;
    }

    .nav-list {
        background-color: var(--surface);
        justify-content: center;
        height: 30rem;
        padding: 3rem 1.5rem;
    }

    .header-inner .nav-list li a {
        font-size: 1.8rem;
        padding: 0.8rem 2rem;
    }

    .header.is-menu-open .close-menu-label::after,
    .header:has(#close-menu:checked) .close-menu-label::after {
        content: '✕';
    }

    body.menu-open {
        overflow: hidden;
    }

    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding-top: calc(var(--header-h) + 4rem);
        min-height: auto;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-text {
        font-size: 1.6rem;
    }

    .hero-image {
        width: 22rem;
        height: 22rem;
    }

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

    .contact-form {
        padding: 2.4rem 2rem;
    }

    .footer-inner {
        flex-direction: column;
        text-align: center;
    }

    .slider {
        height: auto;
        overflow: visible;
        mask-image: none;
        -webkit-mask-image: none;
    }

    .slider .list {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
        gap: 2rem;
        min-width: auto;
        position: static;
        padding: 0 2.4rem;
    }

    .slider .list .item {
        position: static;
        left: auto;
        animation: none;
        width: auto;
        height: auto;
    }

    .skill-border {
        width: 100%;
        height: auto;
        aspect-ratio: 1 / 1.3;
    }

    .card {
        width: 100%;
        height: 100%;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .hero-actions .btn {
        width: 100%;
    }
}