:root {
    color-scheme: dark;
    --bg: #050816;
    --surface: #0b1220;
    --card: #101827;
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --text: #f8fafc;
    --muted: #94a3b8;
    --muted-strong: #cbd5e1;
    --line: rgba(148, 163, 184, 0.14);
    --line-strong: rgba(96, 165, 250, 0.28);
    --glass: rgba(11, 18, 32, 0.72);
    --shadow: 0 28px 90px rgba(0, 0, 0, 0.45);
    --blue-glow: 0 0 60px rgba(59, 130, 246, 0.28);
    --max: 1180px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    overflow-x: hidden;
    background: var(--bg);
    color: var(--text);
    font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.6;
}

body.modal-open {
    overflow: hidden;
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -3;
    background:
        radial-gradient(circle at 72% 14%, rgba(59, 130, 246, 0.24), transparent 32%),
        radial-gradient(circle at 18% 28%, rgba(14, 165, 233, 0.13), transparent 34%),
        radial-gradient(circle at 50% 110%, rgba(59, 130, 246, 0.12), transparent 42%),
        var(--bg);
}

body::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: -2;
    background-image:
        linear-gradient(rgba(96, 165, 250, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(96, 165, 250, 0.06) 1px, transparent 1px),
        linear-gradient(115deg, transparent 0 46%, rgba(96, 165, 250, 0.08) 47%, transparent 48% 100%);
    background-size: 72px 72px, 72px 72px, 480px 480px;
    mask-image: linear-gradient(to bottom, rgba(0, 0, 0, 0.84), transparent 82%);
    pointer-events: none;
}

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

button {
    font: inherit;
}

img {
    max-width: 100%;
}

.site-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    pointer-events: none;
    overflow: hidden;
}

.particle,
.logo-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 999px;
    background: #60a5fa;
    box-shadow: 0 0 18px rgba(96, 165, 250, 0.88);
    opacity: 0.52;
}

.p1 { left: 8%; top: 21%; }
.p2 { right: 15%; top: 31%; }
.p3 { left: 24%; bottom: 27%; }
.p4 { right: 28%; bottom: 18%; }
.p5 { left: 48%; top: 12%; }

.site-header {
    position: fixed;
    top: 18px;
    left: 0;
    right: 0;
    z-index: 100;
    pointer-events: none;
}

.nav-shell {
    width: min(var(--max), calc(100% - 40px));
    min-height: 68px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: minmax(190px, 1fr) auto minmax(72px, 1fr);
    align-items: center;
    gap: 18px;
    border: 1px solid var(--line);
    border-radius: 22px;
    background: rgba(11, 18, 32, 0.68);
    box-shadow: 0 18px 70px rgba(0, 0, 0, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(22px);
    padding: 10px 12px;
    pointer-events: auto;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    min-width: 0;
}

.brand-emblem {
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    display: grid;
    place-items: center;
    overflow: hidden;
    border-radius: 14px;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.28), rgba(16, 24, 39, 0.94));
    box-shadow: 0 0 28px rgba(59, 130, 246, 0.25);
}

.brand-emblem img {
   
    object-fit: contain;
    
}

.brand-copy {
    display: grid;
    gap: 1px;
}

.brand strong {
    color: var(--text);
    font-size: 0.96rem;
    line-height: 1.2;
}

.brand span {
    color: var(--muted);
    font-size: 0.78rem;
    line-height: 1.2;
}

.nav-links {
    display: flex;
    justify-content: center;
    gap: 4px;
    padding: 4px;
    border: 1px solid rgba(148, 163, 184, 0.1);
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.52);
}

.nav-link {
    min-width: 76px;
    border-radius: 12px;
    color: var(--muted);
    font-size: 0.82rem;
    font-weight: 700;
    line-height: 1;
    text-align: center;
    padding: 11px 12px;
    transition: color 180ms ease, background 180ms ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text);
    background: rgba(59, 130, 246, 0.16);
}

.nav-cta {
    justify-self: end;
    min-width: 68px;
    border-radius: 14px;
    background: var(--primary);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 800;
    line-height: 1;
    text-align: center;
    padding: 13px 16px;
    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.22);
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.nav-cta:hover {
    background: linear-gradient(135deg, var(--primary-hover), var(--primary));
    box-shadow: 0 16px 36px rgba(96, 165, 250, 0.32);
    transform: translateY(-1px);
}

main {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
}

section {
    padding: 104px 0;
    scroll-margin-top: 112px;
}

.hero {
    min-height: 100vh;
    display: grid;
    align-items: center;
    padding-top: 130px;
    padding-bottom: 70px;
}

.hero-layout {
    display: grid;
    grid-template-columns: minmax(0, 0.96fr) minmax(360px, 0.74fr);
    align-items: center;
    gap: clamp(42px, 7vw, 96px);
}

.hero-copy-block {
    max-width: 700px;
}

.availability {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin: 0 0 24px;
    border: 1px solid rgba(96, 165, 250, 0.26);
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.09);
    color: var(--muted-strong);
    font-size: 0.86rem;
    font-weight: 700;
    padding: 8px 12px;
}

.availability span {
    width: 8px;
    height: 8px;
    border-radius: 999px;
    background: #22c55e;
    box-shadow: 0 0 18px rgba(34, 197, 94, 0.6);
}

h1,
h2,
h3,
p {
    margin-top: 0;
}

h1 {
    margin: 0 0 24px;
    font-size: clamp(4.4rem, 9.2vw, 8.5rem);
    font-weight: 900;
    line-height: 0.86;
    letter-spacing: 0;
}

h1 span {
    display: block;
}

.gradient-text {
    background: linear-gradient(92deg, #dbeafe 0%, #60a5fa 36%, #2563eb 82%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-shadow: 0 0 54px rgba(59, 130, 246, 0.22);
}

.hero-copy {
    max-width: 650px;
    margin-bottom: 18px;
    color: var(--muted-strong);
    font-size: clamp(1rem, 1.6vw, 1.18rem);
}

.hero-stack {
    margin-bottom: 32px;
    color: var(--muted);
    font-size: 0.98rem;
    font-weight: 700;
}

.hero-actions,
.project-links,
.modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.btn,
.link-btn,
.detail-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    min-height: 46px;
    border: 1px solid rgba(148, 163, 184, 0.17);
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.74);
    color: var(--text);
    cursor: pointer;
    font-size: 0.92rem;
    font-weight: 800;
    padding: 11px 16px;
    transition: transform 180ms ease, border-color 180ms ease, background 180ms ease, box-shadow 180ms ease;
}

.btn.primary,
.link-btn.primary {
    border-color: rgba(96, 165, 250, 0.45);
    background: linear-gradient(135deg, var(--primary), #2563eb);
    box-shadow: 0 16px 36px rgba(59, 130, 246, 0.24);
}

.btn.ghost {
    background: rgba(11, 18, 32, 0.62);
}

.btn:hover,
.link-btn:hover,
.detail-btn:hover {
    border-color: rgba(96, 165, 250, 0.55);
    box-shadow: 0 16px 42px rgba(59, 130, 246, 0.16);
    transform: translateY(-2px);
}

.mobile-cv-btn {
    display: none;
}

.hero-symbol {
    position: relative;
    min-height: 560px;
    display: grid;
    place-items: center;
    isolation: isolate;
}

.hero-symbol::before {
    content: "";
    position: absolute;
    width: min(54vw, 620px);
    aspect-ratio: 1;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.34), rgba(59, 130, 246, 0.11) 35%, transparent 66%);
    filter: blur(10px);
    z-index: -2;
}

.hero-symbol::after {
    content: "";
    position: absolute;
    width: min(48vw, 540px);
    aspect-ratio: 1;
    border-radius: 999px;
    border: 1px solid rgba(96, 165, 250, 0.22);
    box-shadow: inset 0 0 44px rgba(59, 130, 246, 0.12), 0 0 72px rgba(59, 130, 246, 0.2);
    z-index: -1;
}

.orbit {
    position: absolute;
    border-radius: 999px;
    border: 1px solid rgba(96, 165, 250, 0.2);
}

.orbit-one {
    width: min(50vw, 530px);
    aspect-ratio: 1;
    box-shadow: 0 0 38px rgba(59, 130, 246, 0.15);
}

.orbit-two {
    width: min(39vw, 420px);
    aspect-ratio: 1;
    border-style: dashed;
    opacity: 0.8;
}

.logo-energy {
    width: min(30vw, 400px);
    aspect-ratio: 1;
    display: grid;
    place-items: center;
    border-radius: 999px;
    background:
        radial-gradient(circle, rgba(96, 165, 250, 0.2), rgba(16, 24, 39, 0.16) 48%, rgba(5, 8, 22, 0.02) 70%);
    animation: floatLogo 5.5s ease-in-out infinite;
}

.logo-energy img {
    width: 60%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.34);
    filter: drop-shadow(0 0 36px rgba(96, 165, 250, 0.38));
}

.lp1 { left: 18%; top: 19%; }
.lp2 { right: 13%; top: 27%; }
.lp3 { left: 12%; bottom: 30%; }
.lp4 { right: 22%; bottom: 18%; }
.lp5 { right: 48%; top: 8%; }

@keyframes floatLogo {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-16px); }
}

.metrics {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 16px;
    padding-top: 28px;
}

.metric-card,
.project-card,
.skill-group,
.about-panel,
.contact-panel,
.modal-content {
    border: 1px solid var(--line);
    background: linear-gradient(180deg, rgba(16, 24, 39, 0.82), rgba(11, 18, 32, 0.68));
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
}

.metric-card {
    min-height: 142px;
    display: grid;
    align-content: center;
    gap: 8px;
    border-radius: 18px;
    padding: 22px;
}

.metric-card strong {
    color: var(--text);
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1;
}

.metric-card span {
    color: var(--muted);
    font-size: 0.92rem;
    font-weight: 700;
}

.section-heading {
    max-width: 760px;
    margin-bottom: 34px;
}

.section-kicker {
    margin-bottom: 10px;
    color: var(--primary-hover);
    font-size: 0.76rem;
    font-weight: 900;
    letter-spacing: 0.14em;
    text-transform: uppercase;
}

.section-title {
    margin-bottom: 14px;
    font-size: clamp(2.15rem, 4.6vw, 4.1rem);
    font-weight: 850;
    line-height: 1.02;
    letter-spacing: 0;
}

.section-intro,
.project-desc,
.contact-note,
.modal-copy p,
.about-copy p {
    color: var(--muted);
}

.section-intro {
    max-width: 700px;
    margin-bottom: 0;
    font-size: 1rem;
}

.project-tabs {
    display: inline-flex;
    gap: 6px;
    margin-bottom: 22px;
    padding: 5px;
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(11, 18, 32, 0.7);
}

.project-tab {
    min-height: 40px;
    border: 0;
    border-radius: 12px;
    background: transparent;
    color: var(--muted);
    cursor: pointer;
    font-size: 0.86rem;
    font-weight: 800;
    padding: 9px 13px;
    transition: background 180ms ease, color 180ms ease;
}

.project-tab:hover,
.project-tab.active {
    background: rgba(59, 130, 246, 0.18);
    color: var(--text);
}

.project-panel {
    display: none;
}

.project-panel.active {
    display: block;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 18px;
}

.project-card {
    position: relative;
    overflow: hidden;
    border-radius: 20px;
    transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.project-card.no-preview {
    min-height: 100%;
    display: flex;
    flex-direction: column;
}

.project-card.no-preview::before {
    content: "";
    height: 4px;
    background: linear-gradient(90deg, rgba(96, 165, 250, 0.95), rgba(59, 130, 246, 0.25));
}

.project-card.no-preview .project-body {
    padding-top: 24px;
}

.project-card:hover {
    border-color: var(--line-strong);
    box-shadow: var(--blue-glow);
    transform: translateY(-6px);
}

.project-card.featured {
    grid-column: 1 / -1;
    display: grid;
    grid-template-columns: minmax(0, 1.08fr) minmax(360px, 0.92fr);
    align-items: stretch;
}

.project-card.featured.no-preview {
    grid-template-columns: minmax(0, 1fr);
}

.project-preview {
    min-height: 245px;
    overflow: hidden;
    border-bottom: 1px solid var(--line);
    background: #020617;
}

.project-card.featured .project-preview {
    min-height: 100%;
    border-right: 1px solid var(--line);
    border-bottom: 0;
}

.project-preview img {
    width: 100%;
    height: 100%;
    min-height: 245px;
    display: block;
    object-fit: cover;
    opacity: 0.86;
    transition: transform 500ms ease, opacity 220ms ease;
}

.project-card:hover .project-preview img {
    opacity: 1;
    transform: scale(1.04);
}

.project-body {
    display: grid;
    align-content: start;
    gap: 18px;
    padding: clamp(22px, 3vw, 30px);
}

.project-title {
    margin: 0;
    font-size: clamp(1.35rem, 2vw, 1.85rem);
    line-height: 1.16;
}

.project-card.featured .project-title {
    font-size: clamp(1.8rem, 3.2vw, 2.55rem);
}

.badge {
    width: fit-content;
    border: 1px solid rgba(96, 165, 250, 0.3);
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.12);
    color: #bfdbfe;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.08em;
    line-height: 1;
    padding: 8px 10px;
    text-transform: uppercase;
}

.tag-list,
.highlight-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.tag,
.skill-tags span,
.highlight-list li{
    border: 1px solid rgba(96, 165, 250, 0.18);
    border-radius: 999px;
    background: rgba(59, 130, 246, 0.08);
    color: #bfdbfe;
    font-size: 0.8rem;
    font-weight: 800;
    line-height: 1;
    padding: 8px 10px;
}
.about-points span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 38px;
    border: 1px solid rgba(96, 165, 250, 0.22);
    border-radius: 999px;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.14), rgba(45, 196, 201, 0.08));
    color: #dbeafe;
    font-size: 0.82rem;
    font-weight: 800;
    line-height: 1.1;
    padding: 8px 14px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.highlight-list li {
    border-color: rgba(148, 163, 184, 0.14);
    background: rgba(148, 163, 184, 0.07);
    color: var(--muted-strong);
}

.project-desc {
    margin: 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(6, minmax(0, 1fr));
    gap: 18px;
}

.skill-group {
    grid-column: span 3;
    border-radius: 20px;
    padding: 24px;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.skill-group.wide {
    grid-column: span 6;
}

.skill-group:hover {
    border-color: var(--line-strong);
    box-shadow: 0 20px 70px rgba(59, 130, 246, 0.12);
    transform: translateY(-4px);
}

.skill-group > i {
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    margin-bottom: 18px;
    border-radius: 14px;
    background: rgba(59, 130, 246, 0.13);
    color: var(--primary-hover);
}

.skill-group h3 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

.skill-tags,
.about-points {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.about-panel {
    display: grid;
    grid-template-columns: minmax(0, 0.86fr) minmax(340px, 1fr);
    gap: clamp(28px, 5vw, 70px);
    border-radius: 24px;
    padding: clamp(26px, 5vw, 52px);
    position: relative;
    overflow: hidden;
}

.about-panel::before {
    content: "";
    position: absolute;
    inset: -20% auto auto -12%;
    width: 360px;
    aspect-ratio: 1;
    border-radius: 999px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.22), transparent 68%);
    pointer-events: none;
}

.about-copy {
    display: grid;
    gap: 18px;
    position: relative;
}

.about-copy p {
    margin: 0;
    font-size: 1.02rem;
}

.contact-panel {
    position: relative;
    overflow: hidden;
    display: grid;
    grid-template-columns: minmax(0, 0.9fr) minmax(320px, 0.75fr);
    gap: 34px;
    border-radius: 24px;
    padding: clamp(26px, 5vw, 52px);
}

.map-grid {
    position: absolute;
    inset: 0;
    opacity: 0.3;
    background:
        radial-gradient(circle at 72% 45%, rgba(96, 165, 250, 0.32), transparent 2px),
        radial-gradient(circle at 58% 38%, rgba(96, 165, 250, 0.28), transparent 2px),
        radial-gradient(circle at 44% 52%, rgba(96, 165, 250, 0.24), transparent 2px),
        radial-gradient(circle at 34% 43%, rgba(96, 165, 250, 0.22), transparent 2px),
        linear-gradient(90deg, transparent 0 49%, rgba(96, 165, 250, 0.18) 50%, transparent 51% 100%),
        linear-gradient(transparent 0 49%, rgba(96, 165, 250, 0.12) 50%, transparent 51% 100%);
    background-size: 100% 100%, 100% 100%, 100% 100%, 100% 100%, 90px 90px, 90px 90px;
    pointer-events: none;
}

.contact-intro,
.contact-list {
    position: relative;
}

.contact-note {
    margin: 0;
}

.contact-list {
    display: grid;
    gap: 12px;
}

.contact-item {
    display: grid;
    grid-template-columns: 24px 1fr;
    align-items: center;
    gap: 12px;
    min-height: 50px;
    border: 1px solid rgba(148, 163, 184, 0.12);
    border-radius: 16px;
    background: rgba(5, 8, 22, 0.34);
    color: var(--muted-strong);
    overflow-wrap: anywhere;
    padding: 12px 14px;
    transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

a.contact-item:hover {
    border-color: rgba(96, 165, 250, 0.4);
    background: rgba(59, 130, 246, 0.11);
    transform: translateY(-2px);
}

.contact-item i {
    color: var(--primary-hover);
}

.site-footer {
    width: min(var(--max), calc(100% - 40px));
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 14px;
    border-top: 1px solid var(--line);
    color: var(--muted);
    font-size: 0.88rem;
    padding: 30px 0 44px;
}

.modal {
    position: fixed;
    inset: 0;
    z-index: 200;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(2, 6, 23, 0.78);
    backdrop-filter: blur(18px);
}

.modal-content {
    width: min(1080px, 100%);
    max-height: min(86vh, 900px);
    overflow: auto;
    border-radius: 22px;
    box-shadow: var(--shadow);
}

.modal-header {
    position: sticky;
    top: 0;
    z-index: 2;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 16px;
    border-bottom: 1px solid var(--line);
    background: rgba(11, 18, 32, 0.88);
    backdrop-filter: blur(18px);
    padding: 22px;
}

.modal-title-wrap {
    display: grid;
    gap: 12px;
}

.modal-header h2 {
    margin: 0;
    font-size: clamp(1.35rem, 3vw, 2rem);
    line-height: 1.15;
}

.close-btn {
    width: 42px;
    height: 42px;
    flex: 0 0 auto;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(15, 23, 42, 0.72);
    color: var(--muted);
    cursor: pointer;
    transition: border-color 180ms ease, color 180ms ease, background 180ms ease;
}

.close-btn:hover {
    border-color: var(--line-strong);
    color: var(--text);
    background: rgba(59, 130, 246, 0.14);
}

.modal-body {
    display: grid;
    grid-template-columns: minmax(0, 1.04fr) minmax(300px, 0.96fr);
    gap: 24px;
    padding: 22px;
}

.image-slider,
.architecture-map,
.architecture-image {
    overflow: hidden;
    border: 1px solid var(--line);
    border-radius: 18px;
    background: rgba(2, 6, 23, 0.42);
}

.image-slider {
    position: relative;
    min-height: 390px;
}

.image-slider .slides {
    width: 100%;
    height: 100%;
}

.slide {
    display: none;
    width: 100%;
    min-height: 390px;
}

.slide img,
.architecture-image img {
    width: 100%;
    height: 390px;
    display: block;
    object-fit: contain;
    background: #020617;
}

.architecture-showcase,
.modal-copy,
.architecture-map {
    display: grid;
    align-content: start;
    gap: 16px;
}

.architecture-map {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    padding: 18px;
}

.architecture-map > .architecture-node.accented {
    grid-column: 1 / -1;
}

.architecture-branch {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
    grid-column: 1 / -1;
}

.architecture-node {
    border: 1px solid var(--line);
    border-radius: 16px;
    background: rgba(15, 23, 42, 0.58);
    padding: 16px;
}

.architecture-node strong {
    display: block;
    margin-bottom: 6px;
    color: var(--text);
}

.architecture-node span {
    color: var(--muted);
    font-size: 0.9rem;
}

.architecture-node.accented {
    border-color: rgba(96, 165, 250, 0.32);
    background: rgba(59, 130, 246, 0.12);
}

.feature-list {
    display: grid;
    gap: 10px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.feature-list li {
    display: grid;
    grid-template-columns: 18px 1fr;
    gap: 10px;
    color: var(--muted);
}

.feature-list i {
    color: var(--primary-hover);
    margin-top: 4px;
}

.prev,
.next {
    position: absolute;
    top: 50%;
    width: 42px;
    height: 42px;
    display: grid;
    place-items: center;
    border: 1px solid var(--line);
    border-radius: 14px;
    background: rgba(11, 18, 32, 0.78);
    color: var(--text);
    cursor: pointer;
    transform: translateY(-50%);
}

.prev {
    left: 12px;
}

.next {
    right: 12px;
}

.prev:hover,
.next:hover {
    border-color: rgba(96, 165, 250, 0.42);
}

.lightbox-modal {
    position: fixed;
    inset: 0;
    z-index: 300;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
    background: rgba(0, 0, 0, 0.88);
}

.lightbox-modal img {
    max-width: min(1100px, 96vw);
    max-height: 90vh;
    border-radius: 16px;
    border: 1px solid var(--line);
    object-fit: contain;
}

.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 600ms ease, transform 600ms ease;
}

.reveal.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 1ms !important;
        scroll-behavior: auto !important;
        transition-duration: 1ms !important;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }
}

@media (max-width: 980px) {
    .nav-shell {
        grid-template-columns: minmax(0, 1fr) auto;
        align-items: center;
    }

    .nav-links {
        position: static;
        grid-column: 1 / -1;
        width: 100%;
        justify-content: space-between;
        margin-top: 8px;
        box-shadow: var(--shadow);
    }

    .nav-link {
        flex: 1;
        min-width: 0;
    }

    .hero-layout,
    .project-card.featured,
    .about-panel,
    .contact-panel,
    .modal-body {
        grid-template-columns: 1fr;
    }

    .hero { 
        min-height: auto;
    }

    .hero-symbol {
        order: -1;
        min-height: 430px;
    }

    .logo-energy {
        width: min(78vw, 460px);
    }

    .hero-symbol::before {
        width: min(90vw, 540px);
    }

    .hero-symbol::after,
    .orbit-one {
        width: min(82vw, 490px);
    }

    .orbit-two {
        width: min(68vw, 390px);
    }

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

    .project-card.featured .project-preview {
        border-right: 0;
        border-bottom: 1px solid var(--line);
        min-height: 310px;
    }
}

@media (max-width: 680px) {
    main,
    .nav-shell,
    .site-footer {
        width: min(100% - 28px, var(--max));
    }

    section {
        padding: 76px 0;
    }

    .hero {
        padding-top: 116px;
    }

    .brand,
    .nav-cta {
        display: none;
    }

    .nav-shell {
        min-height: auto;
        padding: 10px 12px 12px;
        border-radius: 18px;
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .nav-links {
        position: static;
        grid-column: 1;
        width: 100%;
        margin-top: 2px;
        overflow-x: auto;
    }

    .nav-link {
        font-size: 0.78rem;
        padding-inline: 10px;
    }

    h1 {
        font-size: clamp(3.6rem, 18vw, 5.8rem);
    }

    .hero-symbol {
        min-height: 330px;
    }

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

    .skill-group,
    .skill-group.wide {
        grid-column: span 1;
    }

    .project-tabs {
        width: 100%;
    }

    .project-tab {
        flex: 1;
    }

    .hero-actions,
    .project-links,
    .modal-actions {
        width: 100%;
    }

    .btn,
    .link-btn,
    .detail-btn {
        flex: 1 1 auto;
    }

    .mobile-cv-btn {
    display: inline-flex;
    background: var(--primary);
    color: #ffffff;
    font-size: 0.82rem;
    font-weight: 800;
    line-height: 1;
    text-align: center;
    padding: 13px 16px;
    box-shadow: 0 12px 28px rgba(59, 130, 246, 0.22);
    transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
    }
    

    .modal {
        padding: 12px;
    }

    .modal-content {
        max-height: 88vh;
    }

    .image-slider,
    .slide {
        min-height: 280px;
    }

    .slide img,
    .architecture-image img {
        height: 280px;
    }

    .architecture-map,
    .architecture-branch {
        grid-template-columns: 1fr;
    }

    .site-footer {
        padding-bottom: 96px;
    }
}

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

.article-card {
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: linear-gradient(180deg, rgba(16, 24, 39, 0.84), rgba(11, 18, 32, 0.72));
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.045);
  padding: clamp(22px, 3vw, 30px);
  min-height: 240px;
  text-decoration: none;
  color: inherit;
  transition: border-color 220ms ease, box-shadow 220ms ease, transform 220ms ease;
}

.article-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 4px;
  background: linear-gradient(90deg, rgba(96, 165, 250, 0.95), rgba(59, 130, 246, 0.2));
}

.article-card:hover {
  border-color: var(--line-strong);
  box-shadow: 0 20px 70px rgba(59, 130, 246, 0.12);
  transform: translateY(-6px);
}

.article-tag {
  margin: 0 0 12px;
  color: var(--primary-hover);
  font-size: 0.75rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.article-title {
  margin: 0 0 12px;
  font-size: clamp(1.08rem, 1.9vw, 1.28rem);
  font-weight: 700;
  line-height: 1.35;
  color: var(--text);
}

.article-desc {
  margin: 0;
  font-size: 0.92rem;
  color: var(--muted);
  line-height: 1.6;
}

.article-body {
  flex: 1;
}

.article-footer {
  margin-top: 20px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--primary-hover);
  font-size: 0.82rem;
  font-weight: 700;
}

@media (max-width: 980px) {
  .articles-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .articles-grid {
    grid-template-columns: 1fr;
  }
}