:root {
    --bg: #0b1220;
    --bg-soft: #111b2f;
    --surface: rgba(16, 25, 44, 0.7);
    --surface-solid: #14203a;
    --text: #e8edf8;
    --muted: #a9b6d3;
    --primary: #4ecdc4;
    --primary-strong: #2fa89f;
    --accent: #f7b267;
    --ring: rgba(78, 205, 196, 0.35);
    --danger: #ff6b6b;
    --radius: 16px;
    --shadow: 0 20px 45px rgba(4, 9, 20, 0.45);
    --shadow-soft: 0 12px 30px rgba(4, 9, 20, 0.28);
    --transition: 0.25s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    background:
        radial-gradient(circle at 10% 0%, rgba(78, 205, 196, 0.15), transparent 35%),
        radial-gradient(circle at 90% 15%, rgba(247, 178, 103, 0.2), transparent 30%),
        linear-gradient(180deg, #0b1220 0%, #0c1526 35%, #0a101e 100%);
    color: var(--text);
    font-family: "DM Sans", sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 8px;
    z-index: 2000;
    background: #ffffff;
    color: #0b1220;
    font-weight: 700;
    padding: 10px 14px;
    border-radius: 8px;
}

.skip-link:focus {
    left: 12px;
}

.container {
    width: min(1120px, 92vw);
    margin: 0 auto;
}

section {
    padding: 88px 0;
}

section[id] {
    scroll-margin-top: 92px;
}

h1,
h2,
h3,
h4 {
    font-family: "Space Grotesk", sans-serif;
    letter-spacing: 0.02em;
    line-height: 1.2;
}

h2 {
    font-size: clamp(2rem, 2.8vw, 2.8rem);
    margin-bottom: 40px;
    text-align: center;
}

a {
    color: inherit;
    text-decoration: none;
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid rgba(78, 205, 196, 0.75);
    outline-offset: 2px;
}

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    margin: -1px;
    padding: 0;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    border: 0;
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(12px);
    background: rgba(10, 16, 30, 0.78);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 76px;
}

.logo {
    font-size: 1.5rem;
}

.logo span {
    color: var(--primary);
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 28px;
    align-items: center;
}

.nav-menu a {
    color: var(--muted);
    font-weight: 600;
    position: relative;
    transition: color var(--transition);
}

.nav-menu a::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: -8px;
    width: 100%;
    height: 2px;
    transform: scaleX(0);
    transform-origin: right;
    transition: transform var(--transition);
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--text);
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-toggle {
    display: none;
    border: 0;
    background: transparent;
    width: 32px;
    height: 26px;
    position: relative;
    cursor: pointer;
}

.burger-icon,
.burger-icon::before,
.burger-icon::after {
    content: "";
    display: block;
    height: 2px;
    width: 100%;
    position: absolute;
    left: 0;
    background: var(--text);
    transition: transform var(--transition), opacity var(--transition);
}

.burger-icon {
    top: 12px;
}

.burger-icon::before {
    top: -8px;
}

.burger-icon::after {
    top: 8px;
}

.nav-toggle.active .burger-icon {
    opacity: 0;
}

.nav-toggle.active .burger-icon::before {
    opacity: 1;
    transform: translateY(8px) rotate(45deg);
}

.nav-toggle.active .burger-icon::after {
    opacity: 1;
    transform: translateY(-8px) rotate(-45deg);
}

.hero {
    min-height: 92vh;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 36px;
    align-items: center;
}

.eyebrow {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.16em;
    font-weight: 700;
    font-size: 0.8rem;
    margin-bottom: 18px;
}

.hero-text h2 {
    text-align: left;
    font-size: clamp(2.1rem, 5vw, 3.8rem);
    margin-bottom: 18px;
}

.hero-text h2 span {
    color: var(--primary);
}

.hero-lead {
    max-width: 58ch;
    color: var(--muted);
    font-size: 1.1rem;
    margin-bottom: 28px;
}

.hero-actions {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 22px;
    border-radius: 999px;
    font-weight: 700;
    border: 1px solid transparent;
    background: linear-gradient(135deg, var(--primary), #56ccf2);
    color: #06242b;
    transition: transform var(--transition), box-shadow var(--transition), filter var(--transition);
    box-shadow: 0 10px 20px rgba(78, 205, 196, 0.2);
}

.btn:hover {
    transform: translateY(-2px);
    filter: brightness(1.05);
}

.btn-ghost {
    background: transparent;
    color: var(--text);
    border-color: rgba(255, 255, 255, 0.26);
    box-shadow: none;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 14px;
    padding: 14px;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-soft);
}

.stat-value {
    font-family: "Space Grotesk", sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    color: var(--muted);
    font-size: 0.86rem;
}

.hero-visual {
    min-height: 380px;
    position: relative;
}

.hero-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(1px);
    animation: float 7s ease-in-out infinite;
}

.orb-one {
    width: 210px;
    height: 210px;
    background: radial-gradient(circle at 30% 30%, #8be9e3, #259489);
    top: 30px;
    left: 18%;
}

.orb-two {
    width: 170px;
    height: 170px;
    background: radial-gradient(circle at 30% 30%, #ffd3a7, #f19b38);
    bottom: 35px;
    left: 45%;
    animation-delay: -2s;
}

.orb-three {
    width: 140px;
    height: 140px;
    background: radial-gradient(circle at 30% 30%, #8aa7ff, #3b5ac7);
    top: 140px;
    right: 8%;
    animation-delay: -4s;
}

.about {
    padding-top: 40px;
}

.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 36px;
    align-items: center;
}

.profile-pic {
    width: 100%;
    border-radius: 26px;
    object-fit: cover;
    aspect-ratio: 1 / 1;
    border: 2px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
}

.about-text h2 {
    text-align: left;
    margin-bottom: 14px;
}

.about-text p {
    color: var(--muted);
    margin-bottom: 16px;
    max-width: 66ch;
}

.about-tags {
    list-style: none;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.about-tags li {
    border: 1px solid rgba(255, 255, 255, 0.2);
    padding: 8px 12px;
    border-radius: 999px;
    color: var(--text);
    font-size: 0.92rem;
}

.details-section {
    padding-top: 26px;
}

.info-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
    box-shadow: var(--shadow-soft);
}

.info-item {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    padding: 12px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.info-label {
    display: block;
    color: var(--muted);
    font-size: 0.8rem;
    margin-bottom: 3px;
}

.info-value,
.info-value a {
    color: var(--text);
    font-weight: 700;
}

.education,
.projects {
    background: rgba(12, 19, 35, 0.45);
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.education-section-heading,
.skills-heading {
    margin-bottom: 50px;
}

.timeline {
    max-width: 840px;
    margin: 0 auto;
    position: relative;
}

.timeline::after {
    content: "";
    position: absolute;
    left: 18px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), transparent 85%);
}

.timeline-item {
    position: relative;
    padding-left: 62px;
    margin-bottom: 24px;
}

.timeline-marker {
    position: absolute;
    left: 0;
    top: 14px;
}

.timeline-dot {
    width: 36px;
    height: 36px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: var(--primary);
    color: #06242b;
    font-size: 0.95rem;
    box-shadow: 0 0 0 8px rgba(78, 205, 196, 0.15);
}

.timeline-content {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 18px;
}

.timeline-year {
    color: var(--accent);
    font-weight: 700;
}

.timeline-title {
    font-size: 1.2rem;
    margin: 4px 0;
}

.timeline-college,
.timeline-description {
    color: var(--muted);
}

.skills {
    text-align: center;
}

.certifications {
    text-align: center;
}

.cert-marquee {
    max-width: 1040px;
    margin: 0 auto;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}

.cert-track {
    display: flex;
    gap: 16px;
    width: max-content;
    animation: cert-scroll 24s linear infinite;
}

.cert-marquee:hover .cert-track {
    animation-play-state: paused;
}

.cert-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-soft);
    width: min(340px, 85vw);
    text-align: left;
}

.cert-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.cert-card p {
    color: var(--muted);
    margin-bottom: 16px;
}

.cert-issuer,
.cert-code {
    font-size: 0.95rem;
    margin-bottom: 8px;
}

@keyframes cert-scroll {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

@keyframes project-scroll {
    from {
        transform: translateX(0);
    }
    to {
        transform: translateX(-50%);
    }
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

.skill-card-detailed {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 18px;
    text-align: left;
    box-shadow: var(--shadow-soft);
}

.skill-card-detailed h3 {
    display: inline-block;
    font-size: 1.1rem;
}

.skill-percentage {
    float: right;
    color: var(--primary);
    font-weight: 700;
}

.progress-bar-container {
    background: rgba(255, 255, 255, 0.12);
    border-radius: 999px;
    margin-top: 12px;
    height: 8px;
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), #56ccf2);
    border-radius: inherit;
}

.skill-description {
    margin-top: 12px;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.45;
}

.projects h2 {
    margin-bottom: 0;
}

.project-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 36px;
}

.project-marquee {
    margin-top: 36px;
    overflow: hidden;
    mask-image: linear-gradient(to right, transparent, black 8%, black 92%, transparent);
}

.project-track {
    display: flex;
    gap: 20px;
    width: max-content;
    animation: project-scroll 28s linear infinite;
}

.project-marquee:hover .project-track {
    animation-play-state: paused;
}

.project-marquee .project-card {
    width: min(420px, 88vw);
}

.project-card {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow-soft);
    transition: transform var(--transition), border-color var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    border-color: rgba(78, 205, 196, 0.5);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.project-card p {
    color: var(--muted);
    margin-bottom: 14px;
}

.project-type {
    color: var(--accent);
    font-style: italic;
    margin-top: -2px;
    margin-bottom: 10px;
}

.project-points {
    margin: 0 0 14px 18px;
    color: var(--muted);
}

.project-points li {
    margin-bottom: 4px;
}

.tech-tags {
    display: inline-flex;
    margin-bottom: 16px;
    color: #081b27;
    background: linear-gradient(90deg, var(--primary), #7de0db);
    border-radius: 999px;
    padding: 6px 12px;
    font-size: 0.8rem;
    font-weight: 700;
}

.project-card a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--accent);
    font-weight: 700;
}

.project-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
}

.view-more-container {
    margin-top: 26px;
    text-align: center;
}

.back-link-container {
    margin-bottom: 24px;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-weight: 700;
}

.case-study {
    max-width: 900px;
}

.case-lead {
    color: var(--muted);
    margin-bottom: 22px;
}

.case-block {
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow-soft);
}

.case-block h3 {
    margin-bottom: 10px;
}

.case-block p {
    color: var(--muted);
}

.case-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.contact-section {
    text-align: center;
}

.form-container {
    width: min(680px, 100%);
    margin: 0 auto;
    padding: 26px;
    background: var(--surface);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft);
}

.form-container h2 {
    margin-bottom: 24px;
}

form label {
    display: block;
    text-align: left;
    font-weight: 600;
    margin-bottom: 8px;
}

form input,
form textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.18);
    color: var(--text);
    border-radius: 10px;
    padding: 12px;
    font-family: inherit;
    font-size: 1rem;
    margin-bottom: 16px;
}

form input::placeholder,
form textarea::placeholder {
    color: #8f9bb8;
}

form input:focus,
form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--ring);
}

form textarea {
    min-height: 150px;
    resize: vertical;
}

.form-actions {
    display: flex;
    gap: 12px;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

#formStatus {
    color: var(--muted);
    font-weight: 600;
}

.form-status-success {
    color: #7bed9f;
}

.form-status-error {
    color: var(--danger);
}

.footer {
    margin-top: 16px;
    padding: 30px 0 42px;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    color: var(--muted);
}

.social-buttons {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: center;
}

.social-btn {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    color: #ffffff;
    transition: transform var(--transition), filter var(--transition);
}

.social-btn:hover {
    transform: translateY(-3px);
    filter: brightness(1.1);
}

.linkedin { background: #0a66c2; }
.github { background: #171515; }
.instagram { background: #e4405f; }
.whatsapp { background: #25d366; }
.facebook { background: #1877f2; }

.fade-in,
.slide-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.slide-in {
    transform: translateX(-32px);
}

.visible {
    opacity: 1;
    transform: translate(0, 0);
}

@keyframes float {
    0%,
    100% { transform: translateY(0px); }
    50% { transform: translateY(-14px); }
}

@media (max-width: 980px) {
    section {
        padding: 70px 0;
    }

    .nav-toggle {
        display: block;
    }

    .nav-menu {
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: rgba(8, 14, 26, 0.96);
        border-bottom: 1px solid rgba(255, 255, 255, 0.12);
        flex-direction: column;
        gap: 18px;
        padding: 20px;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-12px);
        transition: opacity var(--transition), transform var(--transition), visibility var(--transition);
    }

    .nav-menu.is-open {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .hero {
        min-height: auto;
        padding-top: 40px;
    }

    .hero-content {
        grid-template-columns: 1fr;
    }

    .hero-text h2,
    .about-text h2 {
        text-align: center;
    }

    .hero-lead {
        margin-left: auto;
        margin-right: auto;
        text-align: center;
    }

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

    .hero-highlights {
        grid-template-columns: 1fr;
    }

    .hero-visual {
        min-height: 260px;
    }

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

    .about-text {
        text-align: center;
    }

    .about-tags {
        justify-content: center;
    }

    .cert-marquee {
        mask-image: none;
        overflow-x: auto;
        padding-bottom: 8px;
    }

    .cert-track {
        animation: none;
        width: auto;
    }

    .project-marquee {
        mask-image: none;
        overflow-x: auto;
        padding-bottom: 8px;
    }

    .project-track {
        animation: none;
        width: auto;
    }

    .info-card {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .skills-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 640px) {
    .container {
        width: min(1120px, 94vw);
    }

    h2 {
        margin-bottom: 32px;
    }

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

    .timeline-item {
        padding-left: 52px;
    }

    .timeline::after {
        left: 14px;
    }

    .timeline-marker {
        left: -4px;
    }

    .form-actions {
        flex-direction: column;
        align-items: stretch;
    }

    #contactSubmit {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation: none !important;
        transition: none !important;
        scroll-behavior: auto !important;
    }
}