:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --card-border: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.15);
    --tag-bg: #0f172a;
    --badge-color: #38bdf8;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    padding: 2.5rem 1rem;
    position: relative;
    overflow-x: hidden;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
}

.bg-3d {
    position: fixed;
    inset: -12% -12%;
    z-index: 0;
    pointer-events: none;
    perspective: 1100px;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.8), rgba(255, 255, 255, 0.08) 55%, rgba(255, 255, 255, 0) 75%);
    filter: blur(1px);
    transform-style: preserve-3d;
    animation: drift 16s ease-in-out infinite alternate;
    opacity: 0.55;
}

.orb-1 {
    width: 46vw;
    max-width: 620px;
    aspect-ratio: 1;
    top: 2%;
    left: -8%;
    animation-duration: 20s;
}

.orb-2 {
    width: 40vw;
    max-width: 520px;
    aspect-ratio: 1;
    top: 42%;
    right: -8%;
    animation-duration: 23s;
    animation-delay: -8s;
    opacity: 0.5;
}

.orb-3 {
    width: 34vw;
    max-width: 460px;
    aspect-ratio: 1;
    bottom: -8%;
    left: 24%;
    animation-duration: 18s;
    animation-delay: -4s;
    opacity: 0.45;
}

.mesh-layer {
    position: absolute;
    inset: -18% -18%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.07) 1px, transparent 1px);
    background-size: 58px 58px;
    transform: rotateX(62deg) translateY(-2%);
    transform-origin: center;
    opacity: 0.3;
    animation: meshFloat 15s linear infinite;
}

@keyframes drift {
    0% {
        transform: translate3d(0, 0, -90px) rotate(0deg) scale(1);
    }

    50% {
        transform: translate3d(3vw, -2.5vh, 120px) rotate(6deg) scale(1.08);
    }

    100% {
        transform: translate3d(-2vw, 2vh, 0) rotate(-5deg) scale(0.96);
    }
}

@keyframes meshFloat {
    0% {
        transform: rotateX(62deg) translate3d(0, -1%, 0);
        background-position: 0 0, 0 0;
    }

    100% {
        transform: rotateX(62deg) translate3d(0, 4%, 0);
        background-position: 0 58px, 58px 0;
    }
}

@media (max-width: 768px) {
    .bg-3d {
        inset: -20% -22%;
    }

    .mesh-layer {
        opacity: 0.2;
    }

    .orb {
        opacity: 0.4;
    }
}

header {
    margin-bottom: 3rem;
    padding-bottom: 2rem;
    border-bottom: 1px solid var(--card-border);
}

.header-tag {
    display: inline-block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 0.3rem 0.8rem;
    border-radius: 9999px;
    margin-bottom: 1rem;
    font-weight: 600;
}

h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.contact-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem 1.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.contact-item a {
    color: var(--accent);
    text-decoration: none;
    transition: opacity 0.2s;
}

.contact-item a:hover {
    text-decoration: underline;
}

section {
    margin-bottom: 3rem;
}

h2 {
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

h2::before {
    content: "";
    display: block;
    width: 4px;
    height: 1.2rem;
    background-color: var(--accent);
    border-radius: 2px;
}

p.summary-text {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.7;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.skill-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    padding: 1.2rem;
    border-radius: 0.75rem;
}

.skill-card h3 {
    font-size: 1rem;
    color: var(--accent);
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.5rem;
}

.tag {
    background-color: var(--tag-bg);
    color: var(--text-secondary);
    font-size: 0.8rem;
    padding: 0.25rem 0.6rem;
    border-radius: 0.35rem;
    border: 1px solid var(--card-border);
}

.project-card,
.experience-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    transition: transform 0.2s, border-color 0.2s;
}

.project-card:hover,
.experience-card:hover {
    border-color: var(--accent);
}

.project-header,
.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.item-title {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.item-period {
    font-size: 0.85rem;
    color: var(--accent);
    font-weight: 500;
}

.item-sub {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

ul.item-bullets {
    list-style-type: none;
    margin-bottom: 1rem;
}

ul.item-bullets li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

ul.item-bullets li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
}

.project-links {
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.cert-intro {
    margin-bottom: 1rem;
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1rem;
}

.certificate-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.certificate-card .btn-link {
    width: fit-content;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    font-size: 0.85rem;
    color: var(--accent);
    text-decoration: none;
    background-color: var(--tag-bg);
    border: 1px solid var(--card-border);
    padding: 0.4rem 0.8rem;
    border-radius: 0.4rem;
    font-weight: 500;
    transition: all 0.2s;
}

.btn-link--small {
    font-size: 0.75rem;
    padding: 0.25rem 0.55rem;
    opacity: 0.9;
}

.btn-link:hover {
    background-color: var(--accent);
    color: var(--bg-color);
}

footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--card-border);
}