/* ─── REPLACE YOUR PHOTO ────────────────────────────────────────────────────
   Open index.html and find the <img> tag inside .portrait-frame.
   Change the src to the path of your photo, e.g.:
       src="me.jpg"
   The image will be automatically fitted, darkened slightly to match the
   dark theme, and given a clean circular crop.
   No other changes are needed.
   ─────────────────────────────────────────────────────────────────────────── */

:root {
    --bg:           #000000;
    --bg-panel:     rgba(20, 20, 20, 0.55);
    --green:        #ff1a1a;
    --green-dim:    rgba(255, 26, 26, 0.15);
    --green-glow:   rgba(255, 26, 26, 0.35);
    --white:        #ffffff;
    --silver:       #a1a1aa;
    --dim:          #71717a;
    --border:       rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 26, 26, 0.5);
    --font:         'Outfit', sans-serif;
    --mono:         'Share Tech Mono', monospace;
    --max-w:        1160px;
    --nav-h:        72px;
    --radius:       14px;
    --font-kanit:   'Kanit', sans-serif;
    --font-anton:   'Anton', 'Impact', sans-serif;
}

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

html { scroll-behavior: smooth; font-size: 16px; scroll-padding-top: calc(var(--nav-h) + 16px); }

body {
    background: var(--bg);
    color: var(--white);
    font-family: var(--font);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -webkit-user-select: none;
    user-select: none;
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: rgba(255,255,255,0.6); }
::-webkit-scrollbar-thumb { background: var(--green-dim); border-radius: 3px; }

/* ── FIXED BACKGROUND ────────────────────────────────────────────────────── */
#bg-canvas {
    position: fixed; inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.65;
    will-change: transform;
}

.mesh-gradient {
    position: fixed; inset: 0; z-index: -1;
    /* PERF: Replaced filter:blur(100px) with pre-blurred large radial gradients.
       Animating a blurred element causes full-layer repaint every frame. */
    background:
        radial-gradient(circle at 15% 35%, rgba(188,0,45,0.06) 0%, transparent 45%),
        radial-gradient(circle at 82% 68%, rgba(188,0,45,0.04) 0%, transparent 45%);
    will-change: transform;
    animation: bgPulse 18s ease-in-out infinite alternate;
}

@keyframes bgPulse {
    from { transform: scale(1) translate3d(0,0,0); }
    to   { transform: scale(1.06) translate3d(1%,1%,0); }
}

.scanlines {
    position: fixed; inset: 0; z-index: 1;
    pointer-events: none;
    background: repeating-linear-gradient(
        to bottom, transparent 0px, transparent 2px,
        rgba(0,0,0,0.08) 2px, rgba(0,0,0,0.08) 4px
    );
    opacity: 0.2;
    contain: strict;
    will-change: auto; /* static layer, no animation needed */
}

/* ── NAVBAR ──────────────────────────────────────────────────────────────── */
.navbar {
    position: fixed; top: 0; left: 0; width: 100%;
    height: var(--nav-h); z-index: 200;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 4rem;
    /* PERF: Replaced backdrop-filter:blur(18px) with solid background.
       backdrop-filter is extremely GPU-heavy, causing jank on scroll. */
    background: rgba(0,0,0,0.88);
    border-bottom: 1px solid var(--border);
    transition: background 0.3s;
    will-change: background;
}

.navbar.scrolled { background: rgba(0,0,0,0.96); }

.nav-brand {
    font-family: var(--font); font-weight: 900; font-size: 1.25rem;
    letter-spacing: 5px;
    background: linear-gradient(120deg, var(--white) 40%, var(--green));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.nav-links { display: flex; list-style: none; gap: 2.8rem; }

.nav-link {
    font-size: 0.82rem; font-weight: 500; letter-spacing: 1.5px;
    color: var(--silver); text-decoration: none; text-transform: uppercase;
    position: relative; padding-bottom: 4px; transition: color 0.25s;
}

.nav-link::after {
    content: ''; position: absolute; bottom: 0; left: 50%;
    width: 0; height: 1px; background: var(--green);
    transition: width 0.3s ease, left 0.3s ease;
}

.nav-link:hover { color: var(--white); }
.nav-link:hover::after { width: 100%; left: 0; }
.contact-nav { color: var(--green); }

.audio-btn {
    display: flex; align-items: center; gap: 0.5rem;
    background: transparent; border: 1px solid var(--border);
    color: var(--silver); font-family: var(--mono); font-size: 0.72rem;
    letter-spacing: 1px; padding: 0.4rem 1rem; border-radius: 999px;
    cursor: pointer; transition: all 0.25s;
}

.audio-dot {
    display: inline-block; width: 6px; height: 6px; border-radius: 50%;
    background: var(--green); box-shadow: 0 0 6px var(--green);
}

.audio-btn:hover { border-color: var(--green); color: var(--green); }

/* ── SHARED LAYOUT ───────────────────────────────────────────────────────── */
.section {
    position: relative; z-index: 10; padding: 120px 4rem;
    /* PERF: Lets browser skip rendering for far-offscreen sections */
    content-visibility: auto;
    contain-intrinsic-size: auto 800px;
    scroll-margin-top: calc(var(--nav-h) + 16px);
}
.section-inner { max-width: var(--max-w); margin: 0 auto; }

.section-label {
    font-family: var(--mono); font-size: 0.78rem; letter-spacing: 3px;
    color: var(--green); margin-bottom: 1.2rem; display: block;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem); font-weight: 300;
    color: var(--white); letter-spacing: -0.5px; margin-bottom: 4rem; line-height: 1.2;
}

.mono { font-family: var(--mono); }

/* Scroll reveal — PERF: use translate3d to force GPU layer */
.reveal {
    opacity: 0;
    transform: translate3d(0, 24px, 0);
    transition: opacity 0.6s ease, transform 0.6s ease;
    will-change: opacity, transform;
}
.reveal.in-view {
    opacity: 1;
    transform: translate3d(0, 0, 0);
    will-change: auto; /* release GPU layer after animation */
}

/* ── HERO ─────────────────────────────────────────────────────────────────── */
.hero-section {
    position: relative; z-index: 10; min-height: 100vh;
    display: flex; flex-direction: column; justify-content: center;
    padding: 0 4rem;
}

.hero-inner {
    max-width: var(--max-w); margin: 0 auto; width: 100%;
    display: grid; grid-template-columns: 1.1fr 1fr;
    gap: 5rem; align-items: center;
    padding-top: var(--nav-h);
}

/* Left side */
.hero-label {
    font-size: 0.75rem; letter-spacing: 4px; color: var(--dim);
    margin-bottom: 1.2rem; display: block;
    opacity: 0; animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-name-block { margin-bottom: 0.5rem; }

.hero-greeting {
    display: block;
    font-family: var(--font); font-weight: 300; font-style: italic;
    font-size: 1.2rem; color: var(--silver); letter-spacing: 2px;
    margin-bottom: 0.3rem;
    opacity: 0; animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-name {
    font-family: var(--font-kanit);
    font-size: clamp(3.5rem, 7vw, 6rem); font-weight: 900;
    font-style: italic;
    line-height: 0.9; letter-spacing: -2px; color: var(--white);
    text-transform: uppercase;
    opacity: 0; transform: translateX(-40px);
    animation: heroNameSlide 1s cubic-bezier(0.16,1,0.3,1) forwards 0.5s;
}

.hero-name-accent { color: var(--green); position: relative; }
.hero-name-accent::after {
    content: '';
    position: absolute; bottom: 4px; left: 0; width: 100%; height: 4px;
    background: var(--green);
    transform: scaleX(0); transform-origin: left;
    animation: accentLine 0.6s ease forwards 1.4s;
}

@keyframes heroNameSlide { to { opacity: 1; transform: translateX(0); } }
@keyframes accentLine { to { transform: scaleX(1); } }

.hero-red-stripe {
    width: 60px; height: 5px;
    background: var(--green); margin: 1.5rem 0; border-radius: 3px;
    opacity: 0; transform: scaleX(0); transform-origin: left;
    animation: stripeGrow 0.8s cubic-bezier(0.16,1,0.3,1) forwards 1s;
}
@keyframes stripeGrow { to { opacity: 1; transform: scaleX(1); } }

.hero-tagline {
    font-family: var(--font-anton);
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    text-transform: uppercase; letter-spacing: 2px;
    color: var(--white); margin-bottom: 1rem;
    opacity: 0; animation: fadeUp 0.8s ease forwards 1.1s;
}
.hero-tagline-sep { color: var(--green); font-weight: 900; margin: 0 0.3rem; }

@keyframes heroSlide { to { opacity: 1; transform: translateY(0); } }

.hero-bio {
    font-size: 0.95rem; color: var(--silver); max-width: 480px;
    margin-bottom: 2rem; line-height: 1.7;
    opacity: 0; animation: fadeUp 0.8s ease forwards 1.2s;
}
@keyframes fadeUp { to { opacity: 1; } }

.hero-cta-row {
    display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2.5rem;
    opacity: 0; animation: fadeUp 0.8s ease forwards 1.3s;
}

.hero-btn-primary {
    display: inline-flex; align-items: center; gap: 0.6rem;
    padding: 0.85rem 1.8rem;
    background: var(--green); color: #ffffff;
    font-family: var(--mono); font-size: 0.8rem; font-weight: 700;
    letter-spacing: 2px; text-decoration: none; text-transform: uppercase;
    border: none; border-radius: 4px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 20px rgba(255, 26, 26, 0.3);
}
.hero-btn-primary:hover {
    background: #ffffff; color: #000000;
    box-shadow: 0 4px 30px rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.hero-btn-outline {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.85rem 1.8rem;
    background: transparent; color: var(--white);
    font-family: var(--mono); font-size: 0.8rem; font-weight: 700;
    letter-spacing: 2px; text-decoration: none; text-transform: uppercase;
    border: 1px solid var(--border); border-radius: 4px;
    transition: all 0.3s ease;
}
.hero-btn-outline:hover {
    border-color: var(--green); color: var(--green);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex; gap: 2.5rem;
    opacity: 0; animation: fadeUp 0.8s ease forwards 1.5s;
}
.hero-stat { display: flex; flex-direction: column; }
.hero-stat-num {
    font-family: var(--font-kanit);
    font-size: 1.8rem; font-weight: 900; font-style: italic;
    color: var(--white); line-height: 1;
}
.hero-stat-label {
    font-family: var(--mono); font-size: 0.7rem;
    letter-spacing: 2px; color: var(--dim); text-transform: uppercase;
    margin-top: 0.3rem;
}

.hero-tags {
    display: flex; flex-wrap: wrap; gap: 0.65rem;
    opacity: 0; animation: fadeUp 1s ease forwards 1.2s;
}
.tag {
    font-size: 0.78rem; font-family: var(--mono); letter-spacing: 0.5px;
    color: var(--green); border: 1px solid var(--border-hover);
    background: var(--green-dim); padding: 0.35rem 0.9rem; border-radius: 999px;
}

/* ── ORBIT STAGE + PORTRAIT ──────────────────────────────────────────────── */
.hero-visual { display: flex; justify-content: center; align-items: center; }

.orbit-stage {
    position: relative; width: 540px; height: 540px;
    display: flex; justify-content: center; align-items: center;
}

.portrait-frame {
    position: absolute; z-index: 10;
    width: 290px; height: 290px;
    border-radius: 50%; overflow: hidden;
    box-shadow:
        0 0 0 2px rgba(188,0,45,0.3),
        0 0 50px rgba(188,0,45,0.22),
        0 0 100px rgba(188,0,45,0.1);
}

.portrait-frame img {
    width: 100%; height: 100%;
    object-fit: cover; object-position: center top;
    display: block;
}

.portrait-frame::after {
    content: '';
    position: absolute; inset: 0; border-radius: 50%;
    background: radial-gradient(circle, transparent 55%, rgba(0,0,0,0.5) 100%);
    pointer-events: none; z-index: 2;
}

.portrait-ring-outer,
.portrait-ring-inner {
    position: absolute; border-radius: 50%;
    z-index: 5; pointer-events: none;
}

.portrait-ring-outer {
    width: 320px; height: 320px;
    border: 2px dashed rgba(188,0,45,0.4);
    border-top: 2px solid rgba(188,0,45,1);
    border-bottom: 2px solid rgba(188,0,45,1);
    animation: ringSpin 8s linear infinite;
}

.portrait-ring-inner {
    width: 304px; height: 304px;
    border: 1px solid rgba(188,0,45,0.2);
    animation: ringPulse 3s ease-in-out infinite 0.7s;
}

@keyframes ringSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes ringPulse {
    0%,100% { opacity: 0.25; transform: scale(1); }
    50%      { opacity: 0.6;  transform: scale(1.02); }
}

/* ── 2D CONCENTRIC ORBIT RINGS ───────────────────────────────────────────── */
.orbit {
    position: absolute; border-radius: 50%;
    border: 1px dashed rgba(188,0,45,0.11);
    display: flex; justify-content: center; align-items: flex-start;
    z-index: 8;
}

.orbit-pill {
    font-family: var(--font); font-size: 0.72rem; font-weight: 500;
    color: var(--green); background: rgba(255,255,255,0.92);
    border: 1px solid rgba(188,0,45,0.28); padding: 0.28rem 0.8rem;
    border-radius: 999px; white-space: nowrap; margin-top: -12px;
    box-shadow: 0 0 12px rgba(188,0,45,0.12);
}

/* PERF: will-change:transform on orbits promotes to GPU layer.
   Using rotate3d ensures compositing stays on GPU. */
.orbit-1 { width: 325px; height: 325px; animation: cw  20s linear infinite; will-change: transform; }
.orbit-2 { width: 370px; height: 370px; animation: ccw 25s linear infinite; will-change: transform; }
.orbit-3 { width: 415px; height: 415px; animation: cw  30s linear infinite; will-change: transform; }
.orbit-4 { width: 460px; height: 460px; animation: ccw 35s linear infinite; will-change: transform; }
.orbit-5 { width: 505px; height: 505px; animation: cw  40s linear infinite; will-change: transform; }

/* Counter-rotate pills — text stays perfectly upright */
.orbit-1 .orbit-pill { animation: ccw 20s linear infinite; will-change: transform; }
.orbit-2 .orbit-pill { animation: cw  25s linear infinite; will-change: transform; }
.orbit-3 .orbit-pill { animation: ccw 30s linear infinite; will-change: transform; }
.orbit-4 .orbit-pill { animation: cw  35s linear infinite; will-change: transform; }
.orbit-5 .orbit-pill { animation: ccw 40s linear infinite; will-change: transform; }

@keyframes cw  { from { transform: rotate3d(0,0,1,0deg);   } to { transform: rotate3d(0,0,1,360deg);  } }
@keyframes ccw { from { transform: rotate3d(0,0,1,0deg);   } to { transform: rotate3d(0,0,1,-360deg); } }

/* Scroll cue */
.scroll-cue {
    position: absolute; bottom: 2.5rem; left: 50%;
    transform: translateX(-50%);
    display: flex; flex-direction: column; align-items: center; gap: 0.6rem;
    opacity: 0.4;
}

.scroll-line {
    width: 1px; height: 50px;
    background: linear-gradient(to bottom, transparent, var(--green));
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse { 0%,100% { opacity: 0.4; } 50% { opacity: 1; } }
.scroll-label { font-size: 0.7rem; letter-spacing: 2px; color: var(--silver); }

/* ── CREDENTIALS ─────────────────────────────────────────────────────────── */
.cred-list { display: flex; flex-direction: column; gap: 0; }

.cred-item {
    display: grid; grid-template-columns: 64px 1fr 96px;
    align-items: center; gap: 2.5rem;
    padding: 2.5rem 0; border-bottom: 1px solid var(--border);
    transition: border-color 0.3s;
}

.cred-item:first-child { border-top: 1px solid var(--border); }
.cred-item:hover { border-color: var(--border-hover); }

.cred-number { font-size: 2.5rem; font-weight: 700; color: var(--green); opacity: 0.55; line-height: 1; }
.cred-content h3 { font-size: 1.25rem; font-weight: 600; color: var(--white); margin-bottom: 0.6rem; }
.cred-content p { font-size: 0.96rem; color: var(--silver); line-height: 1.65; }

.cred-badge {
    font-size: 0.72rem; letter-spacing: 2px; color: var(--green);
    border: 1px solid var(--border-hover); padding: 0.4rem 1rem;
    border-radius: 999px; text-align: center;
    background: var(--green-dim); white-space: nowrap;
}

/* ── PROJECTS ────────────────────────────────────────────────────────────── */
.project-list {
    display: flex; flex-direction: column;
    gap: 1px; background: var(--border);
    border-top: 1px solid var(--border);
}

.project-feature {
    display: grid; grid-template-columns: 180px 1fr;
    gap: 3rem; padding: 3.5rem 2rem; background: var(--bg);
    transition: background 0.3s;
}

.project-feature:hover { background: rgba(255,255,255,0.65); }

.project-meta { display: flex; flex-direction: column; gap: 1.5rem; padding-top: 0.2rem; }
.project-index { font-size: 3rem; font-weight: 700; color: var(--green); opacity: 0.55; line-height: 1; }
.project-stack { display: flex; flex-direction: column; gap: 0.4rem; }
.project-stack span { font-family: var(--mono); font-size: 0.75rem; color: var(--green); letter-spacing: 1px; opacity: 0.9; }

.project-body h3 { font-size: 1.6rem; font-weight: 600; color: var(--white); margin-bottom: 1rem; letter-spacing: -0.3px; }
.project-body p  { font-size: 1rem; color: var(--silver); line-height: 1.7; margin-bottom: 2rem; max-width: 580px; }

.project-link {
    font-family: var(--mono); font-size: 0.82rem; letter-spacing: 1px;
    color: var(--green); text-decoration: none;
    display: inline-flex; align-items: center; gap: 0.4rem;
    transition: letter-spacing 0.3s, opacity 0.3s;
}

.project-link:hover { letter-spacing: 2px; opacity: 0.7; }

/* ── EDUCATION + SKILLS ──────────────────────────────────────────────────── */
.edu-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 6rem; align-items: start; }
.edu-timeline { display: flex; flex-direction: column; }

.edu-item { display: grid; grid-template-columns: 14px 1fr; gap: 1.8rem; position: relative; }

.edu-line {
    position: absolute; left: 6.5px; top: 14px; bottom: -3rem;
    width: 1px; background: var(--border);
}

.edu-line.last { display: none; }

.edu-dot {
    width: 14px; height: 14px; border-radius: 50%;
    background: var(--green); box-shadow: 0 0 12px var(--green-glow);
    flex-shrink: 0; margin-top: 2px; position: relative; z-index: 2;
}

.edu-content { padding-bottom: 3rem; }
.edu-year { font-size: 0.78rem; letter-spacing: 2px; color: var(--green); display: block; margin-bottom: 0.6rem; }
.edu-content h3 { font-size: 1.2rem; font-weight: 600; color: var(--white); margin-bottom: 0.4rem; }
.edu-inst { font-size: 0.82rem; color: var(--silver); display: block; margin-bottom: 0.8rem; font-style: italic; }
.edu-content p { font-size: 0.95rem; color: var(--silver); line-height: 1.65; }

/* ── TOOLS & TECHNOLOGIES ─────────────────────────────────────────────────── */
.edu-tools { padding-top: 0.2rem; }

.tools-heading {
    font-size: 0.78rem;
    letter-spacing: 3px;
    color: var(--green);
    margin-bottom: 2.5rem;
    display: block;
}

.tool-group { margin-bottom: 2rem; }
.tool-group:last-child { margin-bottom: 0; }

.tool-group-label {
    display: block;
    font-size: 0.78rem;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--silver);
    margin-bottom: 0.85rem;
    font-family: var(--mono);
}

.tool-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tool-tag {
    font-size: 0.82rem;
    font-family: var(--font);
    font-weight: 500;
    color: var(--silver);
    background: rgba(0,0,0,0.03);
    border: 1px solid rgba(0,0,0,0.08);
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    transition: border-color 0.25s, color 0.25s;
    cursor: default;
}

.tool-tag:hover {
    border-color: var(--border-hover);
    color: var(--green);
}

/* ── FREELANCING SERVICES ────────────────────────────────────────────────── */
.services-section { border-top: 1px solid var(--border); }
.services-grid {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    text-align: left;
}

.service-card {
    background: rgba(255,255,255,0.5);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 0;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: transform 0.3s cubic-bezier(0.16,1,0.3,1), border-color 0.3s, box-shadow 0.3s;
}

@media (min-width: 768px) {
    .service-card {
        flex-direction: row;
        align-items: center;
    }
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(188,0,45,0.4);
    box-shadow: 0 16px 40px rgba(188,0,45,0.08);
}

.service-card-img {
    width: 100%;
    height: 240px;
    background: rgba(255,255,255,0.8);
    overflow: hidden;
    position: relative;
    border-bottom: 1px solid var(--border);
}

@media (min-width: 768px) {
    .service-card-img {
        width: 320px;
        height: 100%;
        min-height: 240px;
        border-bottom: none;
        border-right: 1px solid var(--border);
        flex-shrink: 0;
    }
}

.service-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.service-card:hover .service-card-img img {
    transform: scale(1.05);
}

.service-card-content {
    padding: 2.5rem;
    flex-grow: 1;
}

.service-icon.mono {
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--green);
    margin-bottom: 1.5rem;
    display: inline-block;
    border: 1px solid rgba(188,0,45,0.3);
    padding: 0.3rem 0.8rem;
    background: rgba(188,0,45,0.1);
    border-radius: 6px;
}

.service-icon.mono::before { content: "// "; opacity: 0.5; }

.service-card h3 { font-size: 1.5rem; font-weight: 600; color: var(--white); margin-bottom: 0.8rem; letter-spacing: -0.3px; }
.service-card p { font-size: 0.95rem; color: var(--silver); line-height: 1.8; }

.contact-sub { font-size: 1.05rem; color: var(--silver); max-width: 540px; margin: 0 auto 3.5rem; line-height: 1.7; }

.contact-actions { display: flex; justify-content: center; gap: 1.5rem; flex-wrap: wrap; }

/* ── BUTTON LIGHT SWEEP EFFECT ───────────────────────────────────────────── */
.contact-btn::before,
.cert-view-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 50%; height: 100%;
    background: linear-gradient(to right, transparent, rgba(255,255,255,0.25), transparent);
    transform: skewX(-25deg);
    transition: none;
    z-index: 1;
    pointer-events: none;
}

.contact-btn:hover::before,
.cert-view-btn:hover::before {
    animation: lightSweep 0.75s ease forwards;
}

@keyframes lightSweep {
    0% { left: -100%; }
    100% { left: 200%; }
}

.contact-btn {
    position: relative; display: inline-flex; align-items: center;
    gap: 0.8rem; padding: 1.1rem 2.5rem; border-radius: 999px;
    font-family: var(--font); font-size: 0.9rem; font-weight: 600;
    letter-spacing: 0.5px; text-decoration: none; overflow: hidden;
    -webkit-mask-image: -webkit-radial-gradient(white, black);
    isolation: isolate;
    transition: transform 0.2s cubic-bezier(0.16,1,0.3,1), box-shadow 0.2s, border-color 0.2s;
    cursor: pointer;
}

.cert-view-btn {
    position: relative;
    overflow: hidden;
    -webkit-mask-image: -webkit-radial-gradient(white, black);
    isolation: isolate;
    transition: transform 0.2s cubic-bezier(0.16,1,0.3,1), box-shadow 0.2s, border-color 0.2s, background 0.2s;
}

.email-btn { color: var(--white); background: rgba(0,0,0,0.04); border: 1px solid rgba(0,0,0,0.15); }
.email-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,0.06); border-color: rgba(0,0,0,0.35); }

.wa-btn { color: var(--green); background: rgba(188,0,45,0.08); border: 1px solid rgba(188,0,45,0.3); }
.wa-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(188,0,45,0.12); border-color: var(--green); }

.li-btn { color: #60a5fa; background: linear-gradient(135deg, rgba(10,102,194,0.15), rgba(10,102,194,0.05)); border: 1px solid rgba(10,102,194,0.4); }
.li-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(10,102,194,0.12); border-color: #3b82f6; }

.gh-btn { color: #e2e8f0; background: linear-gradient(135deg, rgba(240,246,252,0.08), rgba(240,246,252,0.03)); border: 1px solid rgba(240,246,252,0.25); }
.gh-btn:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(240,246,252,0.06); border-color: rgba(240,246,252,0.5); }

.btn-icon { font-size: 1rem; margin-right: 0.2rem; }

.contact-btn:active { transform: scale(0.96) translateY(-1px); box-shadow: 0 4px 15px rgba(0,0,0,0.5); }

/* Primary CTA pulsing effect
   PERF: Replaced box-shadow animation with a pseudo-element + transform/opacity.
   box-shadow changes trigger expensive repaints every frame. */
.primary-cta {
    position: relative;
}
.primary-cta::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    border: 2px solid rgba(188,0,45, 0.5);
    animation: ctaPulse 2s infinite ease-in-out;
    pointer-events: none;
    will-change: transform, opacity;
}

@keyframes ctaPulse {
    0%   { transform: scale(1);    opacity: 0.6; }
    70%  { transform: scale(1.25); opacity: 0; }
    100% { transform: scale(1.25); opacity: 0; }
}

/* ── FOOTER ──────────────────────────────────────────────────────────────── */
.site-footer { position: relative; z-index: 10; border-top: 1px solid var(--border); padding: 2rem 4rem; }

.footer-inner {
    max-width: var(--max-w); margin: 0 auto;
    display: flex; align-items: center; justify-content: space-between;
}

.footer-copy { font-size: 0.78rem; letter-spacing: 1px; color: var(--silver); }

/* ── CERTIFICATE SECTION ─────────────────────────────────────────────────── */
.cert-intro {
    font-size: 1rem; color: var(--silver);
    margin-top: -2.5rem; margin-bottom: 3rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 2rem;
}

.cert-card {
    border-radius: 12px;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.4);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.35s cubic-bezier(0.16,1,0.3,1), border-color 0.3s, box-shadow 0.3s;
}

.cert-card:hover {
    transform: translateY(-6px);
    border-color: rgba(188,0,45,0.35);
    box-shadow: 0 16px 40px rgba(188,0,45,0.08);
}

.cert-thumb {
    position: relative;
    width: 100%; height: 200px;
    background: rgba(255,255,255,0.8);
    display: flex; align-items: center; justify-content: center;
    overflow: hidden;
}

.cert-thumb img {
    width: 100%; height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.4s ease;
}

.cert-card:hover .cert-thumb img { transform: scale(1.04); }

.cert-thumb.cert-placeholder img { display: none; }
.cert-thumb.cert-placeholder { background: rgba(188,0,45,0.04); }

.cert-placeholder-text {
    position: absolute; inset: 0;
    display: flex; align-items: center; justify-content: center;
    font-size: 0.9rem; color: var(--green); letter-spacing: 2px;
    opacity: 0.6;
}

.cert-thumb:not(.cert-placeholder) .cert-placeholder-text { display: none; }

.cert-overlay {
    position: absolute; inset: 0;
    background: rgba(255,255,255,0.7);
    display: flex; align-items: center; justify-content: center;
    opacity: 0;
    transition: opacity 0.3s;
}

.cert-card:hover .cert-overlay { opacity: 1; }

.cert-view-btn {
    font-family: var(--mono); font-size: 0.78rem; letter-spacing: 2px;
    color: var(--green); border: 1px solid var(--green);
    padding: 0.55rem 1.4rem; border-radius: 999px;
    text-transform: uppercase;
    background: rgba(188,0,45,0.08);
}

.cert-info {
    padding: 1.4rem 1.6rem;
    border-top: 1px solid var(--border);
}

.cert-info h3 {
    font-size: 1.1rem; font-weight: 600; color: var(--white);
    margin-bottom: 0.5rem;
}

.cert-issuer, .cert-id {
    display: block; font-size: 0.75rem;
    color: var(--dim); letter-spacing: 1px;
    margin-top: 0.2rem;
}

/* ── CERTIFICATE MODAL ───────────────────────────────────────────────────── */
.cert-modal {
    position: fixed; inset: 0; z-index: 500;
    display: flex; align-items: center; justify-content: center;
    padding: 2rem;
}

.cert-modal[hidden] { display: none; }

.cert-modal-backdrop {
    position: absolute; inset: 0;
    /* PERF: Replaced backdrop-filter:blur(12px) with solid dark overlay. */
    background: rgba(0,0,0,0.92);
    cursor: pointer;
}

.cert-modal-box {
    position: relative; z-index: 2;
    width: 100%; max-width: 940px;
    background: rgba(255,255,255,0.9);
    border: 1px solid var(--border-hover);
    border-radius: 16px;
    box-shadow: 0 30px 80px rgba(0,0,0,0.7);
    overflow: hidden;
    animation: modalIn 0.35s cubic-bezier(0.16,1,0.3,1);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.94) translateY(20px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.cert-modal-close {
    position: absolute; top: 1.2rem; right: 1.4rem;
    background: transparent; border: 1px solid var(--border);
    color: var(--silver); font-size: 1rem;
    width: 36px; height: 36px; border-radius: 50%;
    cursor: pointer; z-index: 5;
    transition: border-color 0.2s, color 0.2s;
    display: flex; align-items: center; justify-content: center;
}

.cert-modal-close:hover { border-color: var(--green); color: var(--white); }

.cert-modal-inner {
    display: grid; grid-template-columns: 1.2fr 1fr;
}

.cert-modal-img-wrap {
    border-right: 1px solid var(--border);
    padding: 2.5rem;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,255,255,0.5);
    min-height: 420px;
}

.cert-modal-img-wrap img {
    max-width: 100%; max-height: 380px;
    object-fit: contain;
    border-radius: 6px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.5);
}

.cert-modal-details {
    padding: 2.5rem;
    display: flex; flex-direction: column;
    gap: 0.6rem;
}

.cert-modal-label {
    font-size: 0.72rem; letter-spacing: 3px;
    color: var(--green); display: block;
    margin-bottom: 0.5rem;
}

.cert-modal-details h2 {
    font-size: 1.6rem; font-weight: 600; color: var(--white);
    margin-bottom: 0.5rem;
}

.cert-modal-issuer, .cert-modal-date, .cert-modal-id {
    font-size: 0.8rem; color: var(--dim); letter-spacing: 1px;
}

.cert-modal-qr-block {
    margin-top: auto; padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    display: flex; gap: 1.2rem; align-items: flex-start;
}

.cert-modal-qr-wrap {
    flex-shrink: 0;
    width: 90px; height: 90px;
    background: white;
    padding: 5px;
    border-radius: 8px;
}

.cert-modal-qr-wrap img {
    width: 100%; height: 100%;
    display: block;
}

.cert-verify-btn {
    display: inline-block;
    margin-top: 0.8rem;
    font-family: var(--mono); font-size: 0.75rem;
    letter-spacing: 1px; color: var(--green);
    border: 1px solid var(--border-hover);
    padding: 0.5rem 1rem; border-radius: 999px;
    text-decoration: none;
    background: var(--green-dim);
    transition: background 0.25s, box-shadow 0.25s;
}

.cert-verify-btn:hover {
    background: rgba(188,0,45,0.25);
    box-shadow: 0 0 12px rgba(188,0,45,0.2);
}

/* ── RESPONSIVE ──────────────────────────────────────────────────────────── */
@media (max-width: 1024px) {
    .section { padding: 100px 2.5rem; }
    .hero-section { padding: 0 2.5rem; }
    .hero-inner { grid-template-columns: 1fr; gap: 3rem; text-align: center; }
    .hero-bio { margin: 0 auto 2.5rem; }
    .hero-tags { justify-content: center; }
    .hero-cta-row { justify-content: center; }
    .hero-stats { justify-content: center; }
    .hero-red-stripe { margin-left: auto; margin-right: auto; }
    .hero-visual { display: flex; justify-content: center; margin-top: 1rem; }
    .orbit-stage { width: 360px; height: 360px; }
    .portrait-frame { width: 220px; height: 220px; }
    .portrait-ring-outer { width: 250px; height: 250px; }
    .portrait-ring-inner { width: 236px; height: 236px; }
    .orbit { display: none; }
    .edu-grid { grid-template-columns: 1fr; gap: 3rem; }
    .cred-item { grid-template-columns: 48px 1fr; }
    .cred-badge { display: none; }
    .project-feature { grid-template-columns: 1fr; gap: 1.5rem; padding: 2.5rem 1.5rem; }
    .navbar { padding: 0 2rem; }
    .nav-links { gap: 1.8rem; }
}

/* Base state for mobile menu button (hidden on desktop) */
.nav-controls { display: flex; align-items: center; gap: 1rem; }
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
    padding: 0.5rem;
    z-index: 201;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all 0.3s cubic-bezier(0.16,1,0.3,1);
}

@media (max-width: 768px) {
    .nav-links { 
        position: fixed;
        top: 0; left: 0; width: 100%; height: 100vh;
        /* PERF: Removed backdrop-filter:blur(20px), using solid background */
        background: rgba(0,0,0,0.97);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2.5rem;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.4s ease, visibility 0.4s ease;
        z-index: 199;
    }
    .nav-links.active {
        opacity: 1;
        visibility: visible;
    }
    .mobile-menu-btn { display: flex; }
    
    /* Hamburger to X animation */
    .mobile-menu-btn.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
    .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }
    
    .nav-link { font-size: 1.2rem; }
}

@media (max-width: 640px) {
    .section-title { font-size: 1.8rem; }
    .contact-actions { flex-direction: column; align-items: stretch; }
    .contact-btn { justify-content: center; }
    .footer-inner { flex-direction: column; gap: 1rem; text-align: center; }
    .orbit-stage { width: 280px; height: 280px; }
    .portrait-frame { width: 180px; height: 180px; }
    .portrait-ring-outer { width: 210px; height: 210px; }
    .portrait-ring-inner { width: 196px; height: 196px; }
}

@media (max-width: 768px) {
    .navbar {
        padding: 0 1rem;
        height: 64px;
    }

    .nav-brand {
        font-size: 1rem;
        letter-spacing: 3px;
    }

    .nav-controls {
        gap: 0.6rem;
    }

    .audio-btn {
        padding: 0.35rem 0.8rem;
        font-size: 0.68rem;
    }

    .hero-section {
        padding: 0 1rem;
    }

    .hero-inner {
        gap: 2rem;
        padding-top: 5.5rem;
    }

    .hero-text,
    .hero-visual {
        width: 100%;
    }

    .hero-name {
        font-size: clamp(2.8rem, 15vw, 4.5rem);
    }

    .hero-tagline {
        font-size: clamp(1rem, 4vw, 1.2rem);
    }

    .hero-bio {
        max-width: 100%;
    }

    .hero-cta-row {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-btn-primary,
    .hero-btn-outline {
        justify-content: center;
        width: 100%;
    }

    .hero-stats {
        display: grid;
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 1rem;
    }

    .hero-stat:last-child {
        grid-column: 1 / -1;
        justify-self: center;
    }

    .hero-stat {
        align-items: center;
        text-align: center;
    }

    .hero-visual {
        overflow: hidden;
    }

    .orbit-stage {
        width: min(86vw, 300px);
        height: min(86vw, 300px);
    }

    .portrait-frame {
        width: min(54vw, 190px);
        height: min(54vw, 190px);
    }

    .portrait-ring-outer {
        width: min(64vw, 230px);
        height: min(64vw, 230px);
    }

    .portrait-ring-inner {
        width: min(58vw, 216px);
        height: min(58vw, 216px);
    }

    .section {
        padding: 88px 1rem;
    }

    .section-title {
        margin-bottom: 2rem;
    }

    .cert-grid,
    .edu-grid,
    .project-feature,
    .cred-item,
    .services-grid {
        grid-template-columns: 1fr;
    }

    .cert-grid {
        grid-template-columns: 1fr;
    }

    .cred-item {
        gap: 1rem;
    }

    .cred-number {
        font-size: 2rem;
    }

    .project-feature {
        padding: 1.5rem 1.1rem;
    }

    .project-meta {
        gap: 0.8rem;
    }

    .project-index {
        font-size: 2.4rem;
    }

    .project-body h3 {
        font-size: clamp(1.6rem, 7vw, 2.2rem) !important;
    }

    .project-body p,
    .service-card p,
    .edu-content p,
    .contact-sub,
    .cert-intro {
        font-size: 0.95rem;
    }

    .service-card-content {
        padding: 1.5rem;
    }

    .service-card-img {
        height: 180px;
    }

    .service-card h3 {
        font-size: 1.35rem;
    }

    .cert-thumb {
        height: 180px;
    }

    .cert-info {
        padding: 1.1rem 1.2rem;
    }

    .edu-item {
        padding: 1.5rem !important;
    }

    #education .edu-dot {
        margin-left: 0 !important;
    }

    .footer-inner {
        flex-direction: column;
        gap: 0.8rem;
        text-align: center;
    }

    .cert-modal {
        padding: 1rem;
    }

    .cert-modal-inner {
        grid-template-columns: 1fr;
    }

    .cert-modal-img-wrap {
        border-right: none;
        border-bottom: 1px solid var(--border);
        min-height: 260px;
        padding: 1.5rem;
    }

    .cert-modal-details {
        padding: 1.5rem;
    }

    .cert-modal-qr-block {
        flex-direction: column;
    }

    .cert-modal-qr-wrap {
        width: 84px;
        height: 84px;
    }
}

@media (max-width: 480px) {
    html { font-size: 15px; }

    .navbar {
        padding: 0 0.75rem;
    }

    .audio-btn {
        display: none;
    }

    .hero-section {
        min-height: auto;
        padding-top: 1.25rem;
        padding-bottom: 2rem;
    }

    .hero-inner {
        padding-top: 4.75rem;
    }

    .hero-name {
        font-size: clamp(2.4rem, 18vw, 3.6rem);
    }

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

    .hero-stat:last-child {
        grid-column: auto;
    }

    .section {
        padding: 72px 0.85rem;
    }

    .section-title {
        font-size: clamp(1.7rem, 10vw, 2.2rem) !important;
    }

    .hero-btn-primary,
    .hero-btn-outline,
    .contact-btn,
    .cert-verify-btn,
    .cert-view-btn {
        width: 100%;
        justify-content: center;
        text-align: center;
    }

    .contact-actions {
        gap: 1rem;
    }

    .service-card-img {
        height: 160px;
    }

    .orbit-stage {
        width: min(90vw, 260px);
        height: min(90vw, 260px);
    }

    .portrait-frame {
        width: min(48vw, 160px);
        height: min(48vw, 160px);
    }

    .portrait-ring-outer {
        width: min(58vw, 196px);
        height: min(58vw, 196px);
    }

    .portrait-ring-inner {
        width: min(52vw, 182px);
        height: min(52vw, 182px);
    }

    .cert-thumb {
        height: 160px;
    }

    .cert-modal-details h2 {
        font-size: 1.35rem;
    }

    .footer-copy {
        font-size: 0.72rem;
    }
}

/* ==========================================================================
   THEME OVERRIDES (Dark / Light Alternating Sections)
   ========================================================================== */

/* Fixes for dark panels */
.navbar { background: rgba(0,0,0,0.88) !important; }
.navbar.scrolled { background: rgba(0,0,0,0.96) !important; }
.service-card { background: rgba(20,20,20,0.5) !important; }
.cert-card { background: rgba(20,20,20,0.4) !important; }
.cert-thumb { background: #050505 !important; }
.cert-modal-box { background: #111111 !important; }
.cert-modal-backdrop { background: rgba(0,0,0,0.9) !important; }

/* Buttons & Tags */
.tool-tag { background: rgba(255,255,255,0.03) !important; border-color: rgba(255,255,255,0.08) !important; }
.email-btn { background: rgba(255,255,255,0.04) !important; border-color: rgba(255,255,255,0.15) !important; }

/* ── LIGHT SECTIONS (Credentials & Education) ── */
#credentials, #education {
    background: #ffffff !important;
    color: #000000 !important;
}
#credentials .section-title, #education .section-title { color: #000000 !important; }
#credentials .cred-content h3, #education .edu-content h3 { color: #000000 !important; }
#credentials .cred-content p, #education .edu-inst, #education .edu-content p { color: #555555 !important; }
#credentials .cred-item, #education .edu-item { border-color: rgba(0,0,0,0.1) !important; }
#credentials .cred-item:first-child { border-top-color: rgba(0,0,0,0.1) !important; }
#credentials .cred-badge { border-color: var(--green) !important; background: rgba(255, 26, 26, 0.1) !important; }

/* Education specifically light grey bg, white cards */
#education { background: #f5f5f5 !important; }
#education .edu-item {
    background: #ffffff !important;
    padding: 2.5rem !important;
    border-radius: 12px !important;
    border: 1px solid rgba(0,0,0,0.05) !important;
    margin-bottom: 2rem !important;
}
#education .edu-line { display: none !important; }
#education .edu-dot { margin-left: -20px !important; }
#education .tool-group-label { color: #000000 !important; }
#education .tool-tag { background: transparent !important; border-color: rgba(0,0,0,0.2) !important; color: #333333 !important; }

/* ── HOVER PROJECTS SECTION ── */
#projects { background: #ffffff !important; }
#projects .section-title { color: #000000 !important; }
.project-list { border-color: rgba(0,0,0,0.1) !important; }

.project-feature {
    background: #ffffff !important;
    color: #000000 !important;
    transition: all 0.3s ease !important;
}
.project-feature .project-body h3,
.project-feature .project-index { color: #000000 !important; transition: all 0.3s ease !important; }
.project-feature .project-body p { color: #555555 !important; transition: all 0.3s ease !important; }

.project-feature:hover {
    background: #000000 !important;
    color: #ffffff !important;
}
.project-feature:hover .project-body h3,
.project-feature:hover .project-index { color: #ffffff !important; }
.project-feature:hover .project-body p { color: #a1a1aa !important; }

/* Restore original colors to images */
.portrait-frame img {
    filter: none !important;
}
.service-card-img img {
    filter: none !important;
}

/* ── ULTRA BOLD FONTS FOR HEADINGS ── */

/* Main Section Titles (Kanit 900 Italic) */
.hero-name,
.section-title {
    font-family: var(--font-kanit) !important;
    text-transform: uppercase !important;
    letter-spacing: 0px !important;
    font-weight: 900 !important;
    font-style: italic !important;
}

/* Make section titles reasonably large */
.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem) !important;
    line-height: 1 !important;
    margin-bottom: 2.5rem !important;
    margin-top: -0.5rem !important;
}

/* Subheadings / Cards (Anton Blocky) */
.project-body h3,
.cred-content h3,
.edu-content h3,
.service-card h3 {
    font-family: var(--font-anton) !important;
    text-transform: uppercase !important;
    letter-spacing: 1px !important;
    font-weight: 400 !important;
    font-style: normal !important;
}

/* Project and card headings sizing */
.project-body h3 {
    font-size: clamp(2rem, 3.5vw, 3rem) !important;
    line-height: 0.95 !important;
    margin-bottom: 1.5rem !important;
}

.cred-content h3, .edu-content h3 {
    font-size: clamp(1.8rem, 2.5vw, 2.2rem) !important;
    line-height: 1 !important;
    margin-bottom: 1rem !important;
}

/* ── CUSTOM SCROLL REVEAL ANIMATIONS ── */
/* PERF: Use translate3d to force GPU compositing, added will-change */

/* Override default reveal for headings: slide in from left */
.reveal-heading {
    opacity: 0 !important;
    transform: translate3d(-60px, 0, 0) skewX(-5deg) !important;
    transition: opacity 0.7s cubic-bezier(0.19, 1, 0.22, 1), transform 0.7s cubic-bezier(0.19, 1, 0.22, 1) !important;
    will-change: opacity, transform;
}
.reveal-heading.in-view {
    opacity: 1 !important;
    transform: translate3d(0, 0, 0) skewX(0) !important;
    will-change: auto;
}

/* Sub-blocks (Cards, Projects): slide up and scale */
.reveal-sub {
    opacity: 0 !important;
    transform: translate3d(0, 50px, 0) scale(0.96) !important;
    transition: opacity 0.5s cubic-bezier(0.25, 1, 0.5, 1), transform 0.5s cubic-bezier(0.25, 1, 0.5, 1) !important;
    will-change: opacity, transform;
}
.reveal-sub.in-view {
    opacity: 1 !important;
    transform: translate3d(0, 0, 0) scale(1) !important;
    will-change: auto;
}