*{
    box-sizing: border-box;
}

:root{
    --page-bg: #eef2f7;
    --section-bg: white;
    --card-bg: white;
    --text-color: #1f2937;
    --muted-text: #4b5563;
    --border-color: #d9e2ec;
    --shadow-color: rgba(15, 23, 42, 0.12);
    --button-shadow: rgba(0, 123, 255, 0.3);
    --accent: #007bff;
    --accent-2: #7c3aed;
}

html{ scroll-behavior: smooth; }

body{
    margin: 0;
    font-family: Arial, sans-serif;
    color: var(--text-color);
    background-color: var(--page-bg);
    background-image: radial-gradient(circle at 10% 15%, rgba(0, 123, 255, 0.08), transparent 28%),
                      radial-gradient(circle at 90% 75%, rgba(124, 58, 237, 0.07), transparent 30%);
    background-attachment: fixed;
    transition: background-color 0.35s ease, color 0.35s ease;
}

body.dark-mode{
    --page-bg: #111827;
    --section-bg: #1f2937;
    --card-bg: #172033;
    --text-color: #f9fafb;
    --muted-text: #cbd5e1;
    --border-color: #374151;
    --shadow-color: rgba(0, 0, 0, 0.35);
    --button-shadow: rgba(0, 166, 255, 0.25);
}

.set1{
    position: relative;
    isolation: isolate;
    overflow: hidden;
    background-color: var(--section-bg);
    border-bottom: 1px solid var(--border-color);
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.set1::before,
.set1::after{
    content: "";
    position: absolute;
    z-index: -1;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    filter: blur(4px);
    opacity: 0.16;
    animation: float-orb 8s ease-in-out infinite alternate;
}
.set1::before{ top: -150px; left: -80px; background: #00a6ff; }
.set1::after{ right: -100px; bottom: -170px; background: #8b5cf6; animation-delay: -4s; }

h1{
    margin: 0 0 12px;
    font-size: 42px;
    line-height: 1.15;
    text-align: center;
}

p{
    margin: 0;
    font-size: 17px;
    line-height: 1.6;
    text-align: center;
    color: var(--muted-text);
    transition: color 0.35s ease;
}

nav{
    width: min(1000px, 92%);
    margin: 0 auto;
    padding: 18px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

nav h2{
    margin: 0;
    font-size: 22px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    background-clip: text;
    color: transparent;
}

nav ul{
    margin: 0;
    padding: 0;
    display: flex;
    gap: 18px;
    list-style: none;
}

nav a{
    position: relative;
    color: var(--muted-text);
    font-weight: bold;
    text-decoration: none;
    transition: color 0.2s ease;
}

nav a::after{
    content: "";
    position: absolute;
    right: 0;
    bottom: -6px;
    left: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transform: scaleX(0);
    transform-origin: right;
    transition: transform 0.25s ease;
}
nav a:hover::after,
nav a:focus-visible::after{ transform: scaleX(1); transform-origin: left; }

nav a:hover{
    color: #007bff;
}

.hero-intro{
    width: min(760px, 92%);
    margin: 0 auto;
    padding: 54px 0 64px;
    animation: hero-arrive 0.8s cubic-bezier(.2,.8,.2,1) both;
}

.hero-intro h1{
    font-size: clamp(46px, 8vw, 76px);
    background: linear-gradient(135deg, var(--text-color) 25%, var(--accent) 65%, var(--accent-2));
    background-clip: text;
    color: transparent;
}

.hero-intro p{
    max-width: 620px;
    margin: 0 auto;
}

.theme-toggle{
    width: 48px;
    height: 48px;
    padding: 0;
    display: grid;
    place-items: center;
    align-items: center;
    background: linear-gradient(135deg, #ffffff, #e0edff);
    color: #2563eb;
    border: 1px solid var(--border-color);
    border-radius: 50%;
    cursor: pointer;
    box-shadow: 0 8px 24px var(--shadow-color);
    transition: background 0.35s ease, color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, transform 0.2s ease;
}

.theme-toggle:hover{
    transform: translateY(-3px) scale(1.06);
}

.theme-toggle:focus-visible{
    outline: 3px solid #60a5fa;
    outline-offset: 3px;
}

.theme-icon{
    grid-area: 1 / 1;
    width: 25px;
    height: 25px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: opacity 0.4s ease, transform 0.5s cubic-bezier(.34, 1.56, .64, 1);
}

body.dark-mode .theme-toggle{
    color: #facc15;
    background: linear-gradient(135deg, #1e293b, #111827);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35), 0 0 18px rgba(250, 204, 21, 0.12);
}

.sun-icon{
    opacity: 0;
    transform: rotate(-120deg) scale(0.35);
}

body.dark-mode .moon-icon{
    opacity: 0;
    transform: rotate(120deg) scale(0.35);
}

body.dark-mode .sun-icon{
    opacity: 1;
    transform: rotate(0) scale(1);
}

body.theme-changing{
    animation: theme-pulse 0.45s ease;
}

@keyframes theme-pulse{
    50%{ filter: brightness(0.94); }
}

@media (prefers-reduced-motion: reduce){
    body,
    body.theme-changing,
    .theme-icon{
        animation: none;
        transition-duration: 0.01ms;
    }
}

.set2{
    min-height: calc(100vh - 73px);
    padding: 48px 0;
    display: flex;
    justify-content: center;
    align-items: center;
}

.profile-card{
    width: min(760px, 92%);
    padding: 28px;
    display: flex;
    align-items: center;
    gap: 28px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    box-shadow: 0 12px 30px var(--shadow-color);
    transition: transform 0.3s ease, background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.profile-card:hover{ transform: translateY(-7px); box-shadow: 0 20px 45px var(--shadow-color); }

.profile-card img{
    width: 220px;
    max-width: 100%;
    border-radius: 14px;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}
.profile-card:hover img{ transform: rotate(-2deg) scale(1.025); box-shadow: 0 12px 28px var(--shadow-color); }

.profile-card div{
    flex: 1;
}

.profile-card h1{
    margin: 0 0 12px;
    font-size: 36px;
    text-align: left;
}

.profile-card p{
    margin: 0 0 20px;
    color: var(--muted-text);
    line-height: 1.6;
    text-align: left;
    transition: color 0.35s ease;
}

.cool-button{
    display: inline-block;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #007bff, #00a6ff);
    color: white;
    padding: 12px 24px;
    border-radius: 6px;
    font-weight: bold;
    letter-spacing: 0;
    text-decoration: none;
    box-shadow: 0 8px 18px var(--button-shadow);
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.cool-button::before{
    content: "";
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.25);
    transition: left 0.35s ease;
}

.cool-button:hover{
    background: linear-gradient(135deg, #0056b3, #008cff);
    transform: translateY(-3px);
    box-shadow: 0 12px 24px rgba(0, 123, 255, 0.4);
}

.cool-button:hover::before{
    left: 100%;
}

.cool-button:active{
    transform: translateY(1px) scale(0.98);
}

@media (max-width: 640px){
    nav,
    .profile-card{
        flex-direction: column;
        text-align: center;
    }

    nav ul{
        flex-wrap: wrap;
        justify-content: center;
    }

    .profile-card h1{
        font-size: 30px;
        text-align: center;
    }

    .profile-card p{
        text-align: center;
    }
}

.my-skills{
    padding: 64px 0;
    background-color: var(--section-bg);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.my-skills h1{
    font-size: 36px;
}

.my-skills > p{
    width: min(620px, 92%);
    margin: 0 auto 28px;
}

.my-skills h2{
    font-size: 28px;
    margin: 0 0 28px;
}

.skills-grid{
    width: min(900px, 92%);
    margin: 0 auto;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 18px;
    list-style: none;
}

.skill-card{
    min-height: 110px;
    padding: 22px;
    display: flex;
    justify-content: center;
    align-items: center;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 24px var(--shadow-color);
    font-size: 20px;
    font-weight: bold;
    text-align: center;
    transition: transform 0.2s ease, background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.skill-card:hover{
    transform: translateY(-6px);
    box-shadow: 0 16px 32px var(--shadow-color);
}

.project-showcase{
    padding: 64px 0;
    background-color: var(--page-bg);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.project-showcase[hidden]{
    display: none;
}

.section-heading{
    width: min(720px, 92%);
    margin: 0 auto 28px;
}

.section-heading h1{
    font-size: 36px;
}

.showcase-actions{
    width: min(1000px, 92%);
    margin: 0 auto 28px;
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
}

.close-showcase{
    padding: 12px 24px;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.2s ease, background-color 0.35s ease, border-color 0.35s ease;
}

.close-showcase:hover{
    transform: translateY(-3px);
}

.project-grid{
    width: min(1000px, 92%);
    margin: 0 auto;
    padding: 0;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 18px;
    list-style: none;
}

.project-card{
    min-height: 300px;
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    background-color: var(--card-bg);
    color: var(--text-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 10px 24px var(--shadow-color);
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.35s ease, transform 0.35s ease, background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.project-card.show{
    opacity: 1;
    transform: translateY(0);
}

.project-card-no-image::before{
    content: "";
    height: 110px;
    display: block;
    border-radius: 8px;
    background: linear-gradient(135deg, #007bff, #22c55e);
}

.project-image{
    width: 100%;
    height: 130px;
    object-fit: cover;
    border-radius: 8px;
    background-color: var(--page-bg);
}

.project-tag{
    width: fit-content;
    padding: 5px 10px;
    background-color: var(--page-bg);
    color: var(--muted-text);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 13px;
    font-weight: bold;
}

.project-title{
    margin: 0;
    font-size: 22px;
}

.project-description{
    flex: 1;
    text-align: left;
}

.project-link{
    color: #007bff;
    font-weight: bold;
    text-decoration: none;
}

.project-link:hover{
    text-decoration: underline;
}

.model-showcase{ width: min(1000px, 92%); margin: 64px auto 0; }
.model-showcase .section-heading{ width: 100%; }
.model-showcase h2{ margin: 0 0 12px; font-size: 32px; text-align: center; }
.model-grid{ display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.model-card{
    margin: 0;
    overflow: hidden;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    box-shadow: 0 10px 24px var(--shadow-color);
    transition: transform 0.25s ease, background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}
.model-card:hover{ transform: translateY(-6px); box-shadow: 0 16px 32px var(--shadow-color); }
.model-view-button{
    width: 100%;
    padding: 0;
    display: block;
    overflow: hidden;
    background: none;
    border: 0;
    cursor: zoom-in;
}
.model-view-button:focus-visible{ outline: 3px solid #60a5fa; outline-offset: -3px; }
.model-card img{ width: 100%; height: 190px; display: block; object-fit: cover; transition: transform 0.35s ease; }
.model-view-button:hover img{ transform: scale(1.06); }
.model-card figcaption{
    padding: 16px;
    color: var(--text-color);
    font-size: 17px;
    font-weight: bold;
    text-align: center;
}

.js-enabled .reveal{
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.65s ease, transform 0.65s cubic-bezier(.2,.8,.2,1);
}
.js-enabled .reveal.is-visible{ opacity: 1; transform: translateY(0); }

@keyframes hero-arrive{
    from{ opacity: 0; transform: translateY(24px) scale(0.98); }
}

@keyframes float-orb{
    to{ transform: translate(35px, 22px) scale(1.12); }
}

.image-viewer{
    width: min(1000px, 92vw);
    max-width: none;
    padding: 0;
    overflow: visible;
    background: transparent;
    border: 0;
}
.image-viewer::backdrop{ background: rgba(3, 7, 18, 0.88); backdrop-filter: blur(5px); }
.image-viewer[open]{ animation: viewer-in 0.25s ease; }
.image-viewer img{
    width: 100%;
    max-height: 78vh;
    display: block;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}
.image-viewer p{ margin-top: 14px; color: white; font-weight: bold; }
.image-viewer-close{
    position: absolute;
    top: -18px;
    right: -18px;
    width: 44px;
    height: 44px;
    padding: 0;
    color: #111827;
    background: white;
    border: 0;
    border-radius: 50%;
    cursor: pointer;
    font-size: 32px;
    line-height: 1;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.35);
}
@keyframes viewer-in{ from{ opacity: 0; transform: scale(0.94); } }

.contact{
    padding: 64px 0;
    background-color: var(--section-bg);
    border-top: 1px solid var(--border-color);
    transition: background-color 0.35s ease, border-color 0.35s ease;
}

.contact > p{
    width: min(620px, 92%);
    margin: 0 auto 28px;
}

.contact-card{
    width: min(1000px, 92%);
    margin: 0 auto;
    padding: 28px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    box-shadow: 0 12px 30px var(--shadow-color);
    transition: background-color 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
}

.contact-info h2{
    margin: 14px 0 12px;
    font-size: 28px;
}

.contact-info p{
    text-align: left;
}

.contact-badge{
    display: inline-block;
    padding: 6px 10px;
    background-color: var(--page-bg);
    color: var(--muted-text);
    border: 1px solid var(--border-color);
    border-radius: 999px;
    font-size: 13px;
    font-weight: bold;
}

.contact-links{
    margin: 0;
    padding: 0;
    display: grid;
    gap: 12px;
    list-style: none;
}

.contact-links a,
.contact-link-text{
    padding: 14px;
    display: block;
    color: var(--text-color);
    background-color: var(--page-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    text-decoration: none;
    transition: transform 0.2s ease, border-color 0.35s ease, background-color 0.35s ease;
}

.contact-links a:hover{
    transform: translateY(-3px);
    border-color: #007bff;
}

.contact-links span{
    display: block;
    margin-bottom: 4px;
    color: var(--muted-text);
    font-size: 13px;
}

.theme-toggle{
    position: fixed;
    right: 20px;
    bottom: 20px;
    z-index: 20;
}

@media (max-width: 760px){
    .model-grid{ grid-template-columns: 1fr; }

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

    .contact-info h2,
    .contact-info p{
        text-align: center;
    }

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

@media (max-width: 480px){
    h1{
        font-size: 34px;
    }

    .hero-intro{
        padding: 42px 0 52px;
    }

    .theme-toggle{
        right: 12px;
        bottom: 12px;
    }
}

@media (prefers-reduced-motion: reduce){
    html{ scroll-behavior: auto; }
    *, *::before, *::after{
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .js-enabled .reveal{ opacity: 1; transform: none; }
}