:root {
    --bg: #090c10;
    --line: rgba(255,255,255,0.09);
    --text: #f3f4f6;
    --muted: #9ca3af;
    --accent: #b8d8ff;
    --accent-warm: #de835d;
    --shadow: 0 18px 60px rgba(0,0,0,0.28);
    --nav-h: 68px;
    --nav-fade-h: 72px;
    --radius-card: 16px;
    --radius-tag: 8px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: "Manrope", sans-serif;
    color: var(--text);
    overflow-x: hidden;
    background:
        radial-gradient(circle at top left, rgba(184,216,255,0.06), transparent 28%),
        linear-gradient(180deg, #06080b 0%, #090c10 50%, #0a0f14 100%);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    background:
        linear-gradient(rgba(255,255,255,0.015) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.015) 1px, transparent 1px);
    background-size: 72px 72px;
    mask-image: radial-gradient(circle at center, black 28%, transparent 82%);
    pointer-events: none;
    z-index: 0;
}

.noise {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.05;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(255,255,255,0.22) 0, transparent 24%),
        radial-gradient(circle at 80% 30%, rgba(255,255,255,0.12) 0, transparent 20%),
        radial-gradient(circle at 50% 80%, rgba(255,255,255,0.08) 0, transparent 16%);
}

/* ── NAVBAR ─────────────────────────────────────────── */

.site-header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 max(24px, calc((100% - 980px) / 2));
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    background: transparent;
    transition: background 350ms ease, -webkit-mask-image 350ms ease, mask-image 350ms ease;
}

/* Gradient strip below the bar: merges scrolling content into the nav (no hard edge) */
.site-header::before {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    height: var(--nav-fade-h);
    background: linear-gradient(
        180deg,
        rgba(6, 8, 11, 0.58) 0%,
        rgba(6, 8, 11, 0.14) 52%,
        transparent 100%
    );
    pointer-events: none;
    opacity: 0;
    transition: opacity 350ms ease;
}

/* Optional subtle hairline — kept very soft so it does not read as a hard cut */
.site-header::after {
    content: "";
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg,
        transparent 0%,
        rgba(255,255,255,0.06) 25%,
        rgba(255,255,255,0.06) 75%,
        transparent 100%);
    opacity: 0;
    transition: opacity 350ms ease;
    pointer-events: none;
}

.site-header.scrolled {
    /* Fade within the bar; mask only the bottom ~22% so nav links stay crisp */
    background: linear-gradient(
        180deg,
        rgba(6, 8, 11, 0.82) 0%,
        rgba(6, 8, 11, 0.72) 55%,
        rgba(6, 8, 11, 0.12) 100%
    );
    -webkit-mask-image: linear-gradient(
        180deg,
        #000 0%,
        #000 78%,
        transparent 100%
    );
    mask-image: linear-gradient(
        180deg,
        #000 0%,
        #000 78%,
        transparent 100%
    );
}

.site-header.scrolled::before {
    opacity: 1;
}

.site-header.scrolled::after {
    opacity: 0;
}

/* ── NAV LINKS ──────────────────────────────────────── */

.nav {
    display: flex;
    flex-wrap: nowrap;
    justify-content: flex-end;
    gap: 2px;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 7px 14px;
    border-radius: 999px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    border: 1px solid transparent;
    transition: color 180ms ease, border-color 180ms ease, background 180ms ease;
}

.nav-link:hover {
    color: var(--text);
    border-color: var(--line);
    background: rgba(255,255,255,0.04);
}

.nav-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 15px; height: 15px;
    flex-shrink: 0;
}

.nav-icon svg {
    width: 14px; height: 14px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.75;
    stroke-linecap: round;
    stroke-linejoin: round;
}

/* ── PAGE LAYOUT ────────────────────────────────────── */

.page {
    width: min(980px, calc(100% - 48px));
    margin: 0 auto;
    padding-top: var(--nav-h);
    padding-bottom: 80px;
    position: relative;
    z-index: 1;
}

.hero, .section {
    scroll-margin-top: var(--nav-h);
}

/* ── HERO ───────────────────────────────────────────── */

.hero {
    display: grid;
    grid-template-columns: minmax(0,1.1fr) minmax(360px,0.9fr);
    gap: 108px;
    align-items: center;
    min-height: calc(100vh - var(--nav-h));
}

.hero-copy {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    max-width: 37rem;
}

.kicker {
    margin: 0 0 1.55rem;
    color: var(--accent-warm);
    font-size: 0.76rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
}

.hero-name {
    margin: 0;
    font-family: "Momo Signature", cursive;
    font-size: clamp(2.45rem, 4.9vw, 3.95rem);
    font-weight: 400;
    line-height: 0.98;
    color: #f2ede7;
    white-space: nowrap;
}

.hero-role {
    margin: 2.35rem 0 0;
    color: rgba(156,163,175,0.8);
    font-size: clamp(0.84rem,1.7vw,1.06rem);
    letter-spacing: 0.18em;
    font-weight: 500;
    text-transform: uppercase;
    white-space: nowrap;
}

.hero-actions {
    display: flex;
    gap: 12px;
    margin-top: 36px;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    min-height: 42px;
    padding: 0 20px;
    border: 1px solid var(--line);
    border-radius: 999px;
    background: rgba(255,255,255,0.02);
    font-family: "Manrope", sans-serif;
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    transition: transform 180ms ease, border-color 180ms ease, box-shadow 180ms ease;
}

.button:hover {
    transform: translateY(-2px);
    border-color: rgba(255,255,255,0.2);
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

.button-primary {
    color: #071018;
    background: linear-gradient(135deg, #f3f7ff, #bdd8ff);
    border-color: transparent;
}

.button-primary:hover { background: linear-gradient(135deg,#fff,#cce4ff); border-color: transparent; }

.button-icon {
    display: inline-flex;
    align-items: center;
    width: 15px; height: 15px;
    flex-shrink: 0;
}

.button-icon svg {
    width: 15px; height: 15px;
    stroke: currentColor; fill: none;
    stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.hero-art { justify-self: stretch; }

.art-frame {
    min-height: 460px;
    border: 1px solid var(--line);
    border-radius: 28px;
    background: linear-gradient(180deg,rgba(255,255,255,0.045),rgba(255,255,255,0.018));
    box-shadow: var(--shadow);
    overflow: hidden;
}

#d3-art { display: block; width: 100%; height: 460px; }

/* ── SECTIONS ───────────────────────────────────────── */

.section {
    padding: 28px 0 48px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.section-label {
    color: var(--accent);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.26em;
    text-transform: uppercase;
    margin-bottom: 24px;
}

.section-sublabel {
    color: var(--muted);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.22em;
    text-transform: uppercase;
    margin-bottom: 24px;
    margin-top: 56px;
}

/* ── PROJECTS ───────────────────────────────────────── */

.project-list { display: grid; }

.project-item {
    display: grid;
    grid-template-columns: minmax(0,1fr) auto;
    gap: 28px;
    align-items: start;
    padding: 32px 0;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.project-item:first-child { border-top: none; padding-top: 0; }

.project-body { display: flex; flex-direction: column; gap: 12px; }

.project-title-row { display: flex; align-items: center; gap: 12px; }

.project-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px; height: 36px;
    border-radius: 10px;
    background: rgba(184,216,255,0.08);
    border: 1px solid rgba(184,216,255,0.14);
    flex-shrink: 0;
}

.project-icon svg {
    width: 18px; height: 18px;
    stroke: var(--accent); fill: none;
    stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round;
}

.project-item h2 {
    margin: 0;
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    color: var(--text);
}

.project-item p {
    margin: 0;
    color: var(--muted);
    line-height: 1.78;
    font-size: 0.97rem;
    max-width: 58ch;
}

/* Meta column: stack row then links row */
.project-meta {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 10px;
    min-width: 140px;
    max-width: 190px;
    padding-top: 6px;
}

.project-meta-stack {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px 12px;
}

.project-meta-links {
    display: flex;
    flex-wrap: wrap;
    justify-content: flex-end;
    gap: 6px 12px;
}

.project-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    font-size: 0.88rem;
    white-space: nowrap;
}

.meta-dot {
    width: 5px; height: 5px;
    border-radius: 50%;
    background: rgba(184,216,255,0.85);
    display: inline-block;
    flex-shrink: 0;
}

.project-meta a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 180ms ease;
}

.project-meta a:hover { color: var(--accent); }

.inline-icon {
    display: inline-flex;
    align-items: center;
    width: 14px; height: 14px;
    flex-shrink: 0;
}

.inline-icon svg {
    width: 14px; height: 14px;
    stroke: currentColor; fill: none;
    stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.inline-icon svg[fill="currentColor"] { stroke: none; fill: currentColor; }

/* ── SKILLS ─────────────────────────────────────────── */

.skills-section { padding-bottom: 48px; }

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 16px;
}

.skill-card {
    padding: 24px 26px;
    border-radius: var(--radius-card);
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.07);
    transition: border-color 220ms ease, background 220ms ease, transform 220ms ease;
}

.skill-card:hover {
    border-color: rgba(184,216,255,0.18);
    background: rgba(184,216,255,0.04);
    transform: translateY(-2px);
}

.skill-card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 18px; }

.skill-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 34px; height: 34px;
    border-radius: 9px;
    background: rgba(184,216,255,0.08);
    border: 1px solid rgba(184,216,255,0.14);
    flex-shrink: 0;
}

.skill-icon svg {
    width: 17px; height: 17px;
    stroke: var(--accent); fill: none;
    stroke-width: 1.7; stroke-linecap: round; stroke-linejoin: round;
}

.skill-card h3 {
    margin: 0;
    font-size: 0.97rem;
    font-weight: 700;
    letter-spacing: -0.01em;
    color: var(--text);
}

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

.skill-tag {
    display: inline-block;
    padding: 4px 11px;
    border-radius: var(--radius-tag);
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.08);
    color: rgba(200,210,230,0.85);
    font-size: 0.82rem;
    font-weight: 600;
    transition: background 180ms ease, border-color 180ms ease, color 180ms ease;
}

.skill-card:hover .skill-tag {
    background: rgba(184,216,255,0.07);
    border-color: rgba(184,216,255,0.15);
    color: var(--accent);
}

/* ── CODING PROFILES ────────────────────────────────── */

.profiles-row { margin-top: 8px; }

.profiles-grid {
    display: grid;
    grid-template-columns: repeat(2,minmax(0,1fr));
    gap: 16px;
}

.profile-card {
    padding: 22px 24px;
    border-radius: var(--radius-card);
    background: rgba(255,255,255,0.025);
    border: 1px solid rgba(255,255,255,0.07);
    display: flex;
    flex-direction: column;
    gap: 16px;
    transition: border-color 220ms ease, background 220ms ease, transform 220ms ease;
}

.profile-card:hover {
    border-color: rgba(184,216,255,0.18);
    background: rgba(184,216,255,0.04);
    transform: translateY(-2px);
}

.profile-card-inner { display: flex; align-items: center; gap: 14px; }

.profile-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px; height: 40px;
    border-radius: 11px;
    flex-shrink: 0;
    background: rgba(184,216,255,0.08);
    border: 1px solid rgba(184,216,255,0.14);
}

.profile-icon svg { width: 20px; height: 20px; }

.profile-icon--leetcode { background: rgba(255,161,22,0.1); border-color: rgba(255,161,22,0.22); color: #ffa116; }
.profile-icon--codeforces { background: rgba(23,115,232,0.1); border-color: rgba(23,115,232,0.22); color: #1773e8; }

.profile-info h3 { margin: 0 0 4px; font-size: 1rem; font-weight: 700; color: var(--text); }
.profile-info p { margin: 0; color: var(--muted); font-size: 0.87rem; line-height: 1; }
.profile-info p strong { color: var(--accent); font-weight: 700; }

.inline-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    color: var(--muted);
    font-size: 0.87rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 180ms ease;
}

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

/* ── CONTACT ────────────────────────────────────────── */

.contact-section { padding-bottom: 40px; }

.contact-row {
    display: grid;
    grid-template-columns: minmax(0,1fr) auto;
    gap: 32px;
    align-items: start;
}

.contact-row p {
    margin: 0;
    color: var(--muted);
    line-height: 1.78;
    font-size: 1rem;
    max-width: 48ch;
}

.contact-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: flex-end; }

.contact-links a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 9px 16px;
    border-radius: 999px;
    border: 1px solid var(--line);
    background: rgba(255,255,255,0.02);
    color: var(--muted);
    font-size: 0.88rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 180ms ease, border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.contact-links a:hover {
    color: var(--accent);
    border-color: rgba(184,216,255,0.28);
    background: rgba(184,216,255,0.06);
    transform: translateY(-1px);
}

.contact-links .inline-icon svg {
    width: 15px; height: 15px;
    stroke: currentColor; fill: none;
    stroke-width: 1.8; stroke-linecap: round; stroke-linejoin: round;
}

.contact-links .inline-icon svg[fill="currentColor"] { fill: currentColor; stroke: none; stroke-width: 0; }

/* ── REVEAL ─────────────────────────────────────────── */

.reveal { opacity: 0; transform: translateY(22px); transition: opacity 650ms ease, transform 650ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

/* ── RESPONSIVE ─────────────────────────────────────── */

/* Helps "Desktop site" mode on phones/tablets stay compact and balanced */
@media (max-width: 1100px) and (min-width: 768px) {
    .site-header {
        justify-content: flex-end;
        padding: 0 16px;
    }
    .nav {
        justify-content: flex-end;
        gap: 2px;
        width: auto;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .nav::-webkit-scrollbar { display: none; }
    .nav-link { padding: 7px 12px; font-size: 0.87rem; }
    .page { width: min(980px, calc(100% - 34px)); }
    .hero { gap: 88px; }
}

@media (max-width: 900px) {
    .hero { grid-template-columns: 1fr; min-height: auto; padding-top: 44px; padding-bottom: 18px; gap: 48px; }
    .skills-grid, .profiles-grid { grid-template-columns: 1fr; }
    .project-item { grid-template-columns: 1fr; }
    .project-meta { flex-direction: row; flex-wrap: wrap; align-items: center; justify-content: flex-start; min-width: 0; max-width: none; padding-top: 0; }
    .project-meta-stack, .project-meta-links { justify-content: flex-start; }
    .contact-row { grid-template-columns: 1fr; }
    .contact-links { justify-content: flex-start; }
}

@media (max-width: 680px) {
    :root { --nav-h: 60px; }
    .page { width: min(100% - 34px, 980px); }
    .site-header { justify-content: center; padding: 0 12px; }
    .nav {
        flex-wrap: nowrap;
        gap: 4px;
        width: 100%;
        overflow-x: hidden;
        justify-content: center;
    }
    .nav-link { padding: 6px 9px; font-size: 0.78rem; white-space: nowrap; gap: 5px; }
    .nav-icon { width: 13px; height: 13px; }
    .nav-icon svg { width: 12px; height: 12px; }
    .hero-copy {
        align-items: center;
        text-align: center;
        margin: 0 auto;
        max-width: 100%;
    }
    .hero-name { font-size: clamp(2.1rem,8.2vw,3rem); white-space: normal; }
    .hero-role { margin-top: 1.9rem; font-size: 0.8rem; letter-spacing: 0.14em; white-space: normal; }
    .hero-actions { width: 100%; flex-wrap: wrap; justify-content: center; }
    .button { min-height: 40px; padding: 0 16px; }
    .art-frame, #d3-art { min-height: 360px; height: 360px; }
    .section { padding: 22px 0 40px; }
    .section-label, .section-sublabel { letter-spacing: 0.18em; }
    .project-title-row { align-items: flex-start; }
    .project-item h2 { font-size: 1.12rem; }
    .project-item p, .contact-row p { font-size: 0.93rem; line-height: 1.7; }
    .project-meta span, .project-meta a, .contact-links a { font-size: 0.82rem; }
    .skill-card, .profile-card { padding: 20px; }
}

@media (max-width: 460px) {
    .page { width: calc(100% - 28px); }
    .site-header { padding: 0 8px; }
    .nav { gap: 2px; }
    .nav-link { padding: 6px 7px; font-size: 0.74rem; }
    .hero-copy { padding-inline: 2px; }
    .hero { gap: 36px; padding-top: 28px; }
    .kicker { margin-bottom: 1.1rem; }
    .hero-role { margin-top: 1.35rem; letter-spacing: 0.1em; }
    .button { width: 100%; justify-content: center; }
    .art-frame, #d3-art { min-height: 300px; height: 300px; }
    .project-item { gap: 16px; padding: 24px 0; }
    .skills-grid, .profiles-grid { gap: 12px; }
    .profile-card-inner { align-items: flex-start; }
    .contact-links { width: 100%; }
}

/* Desktop-site mode on phones/tablets: keep desktop look but avoid awkward spacing */
@media (hover: none) and (pointer: coarse) and (min-width: 768px) {
    .site-header {
        justify-content: flex-end;
        padding: 0 max(16px, calc((100% - 980px) / 2));
    }
    .nav {
        justify-content: flex-end;
        gap: 2px;
        width: auto;
        max-width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
    }
    .nav::-webkit-scrollbar { display: none; }
    .nav-link { padding: 7px 12px; font-size: 0.87rem; }

    .page { width: min(980px, calc(100% - 34px)); }
    .hero {
        min-height: clamp(520px, calc(100vh - var(--nav-h)), 760px);
        gap: 82px;
    }
}

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