/* =====================================================
   Custom Properties
   ===================================================== */
:root {
    --bg:           #0a0a0e;
    --bg-surface:   #111118;
    --bg-card:      #18181f;
    --bg-card-2:    #1e1e28;
    --border:       rgba(255,255,255,0.055);
    --border-hi:    rgba(129,140,248,0.45);
    --border-glow:  rgba(129,140,248,0.2);

    --accent:       #818cf8;
    --accent-2:     #c084fc;
    --accent-3:     #34d399;
    --accent-warm:  #fb923c;
    --grad:         linear-gradient(135deg, #818cf8, #c084fc);
    --grad-subtle:  linear-gradient(135deg, rgba(129,140,248,0.15), rgba(192,132,252,0.15));

    --text:         #f0f4f8;
    --text-muted:   #8b95a7;
    --text-dim:     #3d4452;

    --font:   'Noto Sans KR', -apple-system, BlinkMacSystemFont, sans-serif;
    --mono:   'JetBrains Mono', 'Fira Code', monospace;

    --r-xs: 6px;
    --r-sm: 8px;
    --r:    14px;
    --r-lg: 20px;
    --r-xl: 28px;

    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    --t:    0.22s;
    --t-md: 0.38s;

    --shadow:    0 4px 20px rgba(0,0,0,0.4);
    --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
    --glow:      0 0 40px rgba(129,140,248,0.15);
    --glow-sm:   0 0 20px rgba(129,140,248,0.1);

    --nav-h:  64px;
    --wrap:   1140px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

/* Subtle noise texture */
body::after {
    content: '';
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
    pointer-events: none;
    z-index: 9999;
    opacity: 0.4;
}

a      { text-decoration: none; color: inherit; }
img    { max-width: 100%; display: block; }
ul     { list-style: none; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }

/* =====================================================
   Layout
   ===================================================== */
.container {
    width: 100%;
    max-width: var(--wrap);
    margin: 0 auto;
    padding: 0 28px;
}

.section { padding: 100px 0; }

.section__header {
    text-align: center;
    margin-bottom: 64px;
}

.section__sub {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.2em;
    margin-bottom: 12px;
}

.section__title {
    font-size: clamp(1.9rem, 3.5vw, 2.8rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    background: linear-gradient(135deg, var(--text) 60%, rgba(129,140,248,0.6));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section__desc {
    color: var(--text-muted);
    margin-top: 12px;
    font-size: 0.95rem;
}

/* =====================================================
   Reveal Animation
   ===================================================== */
.reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* =====================================================
   Buttons
   ===================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--r-sm);
    font-size: 0.88rem;
    font-weight: 500;
    transition: all var(--t) var(--ease);
    white-space: nowrap;
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--grad);
    color: #fff;
    box-shadow: 0 0 30px rgba(129,140,248,0.25);
}
.btn--primary::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    opacity: 0;
    transition: opacity var(--t);
}
.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 50px rgba(129,140,248,0.4);
}
.btn--primary:hover::before { opacity: 1; }

.btn--outline {
    border: 1px solid var(--border-hi);
    color: var(--accent);
    background: rgba(129,140,248,0.04);
}
.btn--outline:hover {
    background: rgba(129,140,248,0.12);
    border-color: var(--accent);
    transform: translateY(-2px);
    box-shadow: var(--glow-sm);
}

/* =====================================================
   Header
   ===================================================== */
.header {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    height: var(--nav-h);
    transition: all var(--t-md) var(--ease);
}
.header.scrolled {
    background: rgba(10,10,14,0.88);
    backdrop-filter: blur(24px) saturate(1.5);
    -webkit-backdrop-filter: blur(24px) saturate(1.5);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 1px 24px rgba(0,0,0,0.3);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.nav__logo {
    font-family: var(--mono);
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}
.nav__logo span {
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav__list {
    display: flex;
    align-items: center;
    gap: 36px;
}

.nav__link {
    font-size: 0.87rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: color var(--t);
    position: relative;
    padding-bottom: 2px;
}
.nav__link::after {
    content: '';
    position: absolute;
    bottom: -2px; left: 0;
    width: 0; height: 2px;
    background: var(--grad);
    border-radius: 2px;
    transition: width var(--t) var(--ease);
}
.nav__link:hover, .nav__link.active { color: var(--text); }
.nav__link:hover::after, .nav__link.active::after { width: 100%; }

.nav__hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}
.nav__hamburger span {
    display: block;
    width: 22px; height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all var(--t) var(--ease);
}
.nav__hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__hamburger.open span:nth-child(2) { opacity: 0; transform: scaleX(0); }
.nav__hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =====================================================
   Hero
   ===================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: var(--nav-h);
    overflow: hidden;
}

.hero__bg-banner {
    position: absolute;
    inset: 0;
    background: url('images/banner.jpg') center/cover no-repeat;
    opacity: 0.06;
    pointer-events: none;
}

.hero__bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(129,140,248,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(129,140,248,0.03) 1px, transparent 1px);
    background-size: 56px 56px;
    mask-image: radial-gradient(ellipse 75% 75% at 50% 50%, black 20%, transparent 100%);
    -webkit-mask-image: radial-gradient(ellipse 75% 75% at 50% 50%, black 20%, transparent 100%);
    pointer-events: none;
}

.hero::before {
    content: '';
    position: absolute;
    width: 800px; height: 800px;
    background: radial-gradient(circle, rgba(129,140,248,0.08) 0%, transparent 65%);
    top: -200px; right: -200px;
    pointer-events: none;
}
.hero::after {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(192,132,252,0.06) 0%, transparent 65%);
    bottom: -100px; left: -150px;
    pointer-events: none;
}

.hero__container {
    display: grid;
    grid-template-columns: 1fr 460px;
    align-items: center;
    gap: 80px;
    padding-top: 48px;
    padding-bottom: 96px;
    width: 100%;
    max-width: var(--wrap);
    margin: 0 auto;
    padding-left: 28px;
    padding-right: 28px;
    position: relative;
    z-index: 1;
}

.hero__content { animation: fadeUp 0.8s var(--ease) both; }

.hero__greeting {
    font-family: var(--mono);
    font-size: 0.85rem;
    color: var(--accent);
    letter-spacing: 0.08em;
    margin-bottom: 18px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.hero__greeting::before {
    content: '';
    width: 32px; height: 1px;
    background: var(--grad);
    display: inline-block;
}

.hero__name {
    font-size: clamp(3.2rem, 6.5vw, 5.5rem);
    font-weight: 800;
    letter-spacing: -0.05em;
    line-height: 1.0;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--text) 30%, rgba(192,132,252,0.85));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero__role-wrap {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--text-muted);
    margin-bottom: 24px;
    min-height: 2.2em;
}
.hero__role-prefix { flex-shrink: 0; }
.hero__typing { color: var(--accent); font-weight: 600; }
.hero__cursor {
    color: var(--accent);
    animation: blink 1s step-end infinite;
    font-weight: 200;
}

.hero__desc {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: 1.9;
    margin-bottom: 40px;
    max-width: 480px;
}

.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Code window */
.hero__code-block { animation: fadeUp 0.8s var(--ease) 0.2s both; }

.code-window {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg), 0 0 60px rgba(129,140,248,0.06);
    position: relative;
}
.code-window::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--r-xl);
    padding: 1px;
    background: linear-gradient(135deg, rgba(129,140,248,0.2), transparent, rgba(192,132,252,0.1));
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

.code-window__header {
    display: flex;
    align-items: center;
    gap: 7px;
    padding: 14px 20px;
    background: rgba(0,0,0,0.25);
    border-bottom: 1px solid var(--border);
}

.code-dot { width: 12px; height: 12px; border-radius: 50%; }
.code-dot--red    { background: #ff5f57; }
.code-dot--yellow { background: #febc2e; }
.code-dot--green  { background: #28c840; }

.code-window__title {
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--text-dim);
    margin-left: 8px;
}

.code-window__body { padding: 26px 28px; overflow-x: auto; }
.code-window__body code {
    font-family: var(--mono);
    font-size: 0.84rem;
    line-height: 1.9;
    display: block;
    white-space: pre;
}

.ck { color: #c084fc; }
.cc { color: #818cf8; }
.ct { color: #67e8f9; }
.cs { color: #86efac; }
.cn { color: #fb923c; }

/* Scroll hint */
.hero__scroll-hint {
    position: absolute;
    bottom: 36px; left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}
.scroll-mouse {
    width: 22px; height: 36px;
    border: 2px solid rgba(129,140,248,0.35);
    border-radius: 11px;
    position: relative;
}
.scroll-mouse::after {
    content: '';
    position: absolute;
    top: 5px; left: 50%;
    transform: translateX(-50%);
    width: 3px; height: 7px;
    background: var(--accent);
    border-radius: 2px;
    animation: scrollAnim 1.7s var(--ease) infinite;
}

/* =====================================================
   Stats
   ===================================================== */
.stats {
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    background: var(--bg-surface);
    position: relative;
    overflow: hidden;
}
.stats::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, transparent, rgba(129,140,248,0.03), transparent);
    animation: shimmer 4s ease infinite;
}

.stats__grid { display: grid; grid-template-columns: repeat(4, 1fr); }

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 20px;
    border-right: 1px solid var(--border);
    position: relative;
    transition: background var(--t);
}
.stat-item:last-child { border-right: none; }
.stat-item:hover { background: rgba(129,140,248,0.03); }

.stat-item__num {
    font-family: var(--mono);
    font-size: 2.4rem;
    font-weight: 700;
    background: var(--grad);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
    margin-bottom: 8px;
    transition: transform var(--t) var(--ease-spring);
}
.stat-item:hover .stat-item__num { transform: scale(1.08); }
.stat-item__num small { font-size: 1rem; }

.stat-item__label {
    font-size: 0.8rem;
    color: var(--text-muted);
    letter-spacing: 0.04em;
    font-weight: 500;
}

/* =====================================================
   About
   ===================================================== */
.about__grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 60px;
    align-items: start;
}

.about__text p {
    color: var(--text-muted);
    margin-bottom: 20px;
    line-height: 1.9;
    font-size: 0.97rem;
}
.about__text strong { color: var(--text); font-weight: 600; }

.about__chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 28px;
}

.chip {
    padding: 5px 14px;
    background: rgba(129,140,248,0.06);
    border: 1px solid rgba(129,140,248,0.15);
    border-radius: 100px;
    font-size: 0.76rem;
    color: var(--accent);
    font-family: var(--mono);
    letter-spacing: 0.03em;
    transition: all var(--t);
}
.chip:hover {
    background: rgba(129,140,248,0.14);
    border-color: var(--accent);
}

.about__info {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: relative;
    overflow: hidden;
}
.about__info::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad);
}

.info-row { display: flex; flex-direction: column; gap: 4px; }

.info-row__label {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.14em;
}

.info-row__value {
    font-size: 0.9rem;
    color: var(--text);
    font-weight: 500;
}

/* =====================================================
   Skills
   ===================================================== */
.skills { background: var(--bg-surface); }

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

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 28px;
    transition: border-color var(--t), transform var(--t) var(--ease),
                box-shadow var(--t);
    transition-delay: calc(var(--i, 0) * 70ms);
    position: relative;
    overflow: hidden;
}
.skill-card::before {
    content: '';
    position: absolute;
    left: 0; top: 0; bottom: 0;
    width: 3px;
    background: var(--cc, var(--accent));
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.35s var(--ease);
    border-radius: 0 2px 2px 0;
}
.skill-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse 80% 80% at 0% 50%, rgba(129,140,248,0.04), transparent);
    opacity: 0;
    transition: opacity var(--t);
}
.skill-card:hover {
    border-color: var(--border-hi);
    transform: translateY(-5px);
    box-shadow: var(--glow), 0 8px 32px rgba(0,0,0,0.3);
}
.skill-card:hover::before { transform: scaleY(1); }
.skill-card:hover::after  { opacity: 1; }

.skill-card__head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    position: relative;
    z-index: 1;
}

.skill-card__emoji { font-size: 1.5rem; }

.skill-card__title {
    font-family: var(--mono);
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.03em;
    transition: color var(--t);
}
.skill-card:hover .skill-card__title { color: var(--cc, var(--accent)); }

.skill-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    position: relative;
    z-index: 1;
}

.stag {
    padding: 4px 12px;
    border-radius: 100px;
    font-size: 0.74rem;
    font-weight: 500;
    background: rgba(255,255,255,0.04);
    border: 1px solid var(--border);
    color: var(--text-muted);
    transition: all var(--t);
}
.stag--main {
    background: rgba(129,140,248,0.1);
    border-color: rgba(129,140,248,0.22);
    color: #a5b4fc;
}
.skill-card:hover .stag--main {
    background: rgba(129,140,248,0.16);
    border-color: rgba(129,140,248,0.35);
}

/* =====================================================
   Projects
   ===================================================== */
.company-badge {
    display: inline-flex;
    align-items: center;
    gap: 16px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    margin-bottom: 48px;
    transition: border-color var(--t);
}
.company-badge:hover { border-color: var(--border-hi); }
.company-badge--personal { margin-top: 64px; }
.company-badge__icon { font-size: 1.8rem; }
.company-badge__name { font-size: 1rem; font-weight: 700; }
.company-badge__period {
    font-family: var(--mono);
    font-size: 0.76rem;
    color: var(--accent);
    margin-top: 3px;
}

/* Timeline */
.timeline { position: relative; padding-left: 30px; }
.timeline::before {
    content: '';
    position: absolute;
    left: 5px; top: 16px; bottom: 16px;
    width: 2px;
    background: linear-gradient(to bottom, var(--accent), var(--accent-2), transparent);
    opacity: 0.22;
    border-radius: 2px;
}

.timeline__item {
    display: grid;
    grid-template-columns: 155px 1fr;
    gap: 20px;
    margin-bottom: 24px;
    align-items: start;
}

.tl-meta {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    padding-right: 20px;
    padding-top: 20px;
    gap: 6px;
}

.tl-dot {
    position: absolute;
    right: -32px; top: 22px;
    width: 12px; height: 12px;
    border-radius: 50%;
    background: var(--bg-surface);
    border: 2px solid var(--accent);
    z-index: 1;
    transition: all var(--t) var(--ease-spring);
}
.timeline__item:hover .tl-dot {
    transform: scale(1.3);
    box-shadow: 0 0 12px rgba(129,140,248,0.5);
}
.tl-dot--purple {
    background: var(--accent-2);
    border-color: var(--accent-2);
    width: 14px; height: 14px;
    right: -33px;
    box-shadow: 0 0 12px rgba(192,132,252,0.5);
}
.tl-dot--green {
    background: var(--accent-3);
    border-color: var(--accent-3);
    box-shadow: 0 0 12px rgba(52,211,153,0.5);
    animation: pulse 2.2s ease infinite;
}

.tl-period {
    font-family: var(--mono);
    font-size: 0.7rem;
    color: var(--text-dim);
    text-align: right;
    line-height: 1.5;
    white-space: nowrap;
}
.tl-period--purple { color: var(--accent-2); }
.tl-period--green  { color: var(--accent-3); }

/* Project card */
.pcard {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    overflow: hidden;
    transition: border-color var(--t), box-shadow var(--t);
}
.pcard:hover { border-color: var(--border-hi); box-shadow: var(--glow-sm); }

.pcard--featured {
    border-color: rgba(192,132,252,0.22);
    background: linear-gradient(135deg, var(--bg-card), rgba(192,132,252,0.03));
    box-shadow: 0 0 40px rgba(192,132,252,0.06);
}
.pcard--featured:hover { box-shadow: 0 0 48px rgba(192,132,252,0.15); }

.pcard--current {
    border-color: rgba(52,211,153,0.22);
    background: linear-gradient(135deg, var(--bg-card), rgba(52,211,153,0.02));
}
.pcard--current:hover { box-shadow: 0 0 40px rgba(52,211,153,0.1); }

/* Card header */
.pcard__head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 22px 24px;
    cursor: pointer;
    user-select: none;
    gap: 16px;
    transition: background var(--t);
}
.pcard__head:hover { background: rgba(255,255,255,0.015); }

.pcard__head-inner { flex: 1; min-width: 0; }

.pcard__badges { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 10px; }

.tbadge {
    font-family: var(--mono);
    font-size: 0.68rem;
    padding: 3px 9px;
    border-radius: 100px;
    background: rgba(129,140,248,0.08);
    border: 1px solid rgba(129,140,248,0.16);
    color: var(--accent);
}
.tbadge--pm     { background: rgba(192,132,252,0.1);  border-color: rgba(192,132,252,0.25); color: var(--accent-2); }
.tbadge--current{ background: rgba(52,211,153,0.1);   border-color: rgba(52,211,153,0.25);  color: var(--accent-3); }

.pcard__title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    line-height: 1.4;
}

.badge-pm {
    font-size: 0.66rem;
    padding: 2px 9px;
    border-radius: 100px;
    background: var(--grad);
    color: #fff;
    font-weight: 700;
    letter-spacing: 0.04em;
}
.badge-current {
    font-size: 0.66rem;
    padding: 2px 9px;
    border-radius: 100px;
    background: rgba(52,211,153,0.12);
    color: var(--accent-3);
    border: 1px solid rgba(52,211,153,0.3);
    font-weight: 600;
}

.badge-side {
    font-size: 0.66rem;
    padding: 2px 9px;
    border-radius: 100px;
    background: rgba(192,132,252,0.12);
    color: var(--accent-2);
    border: 1px solid rgba(192,132,252,0.3);
    font-weight: 600;
}

.pcard__summary {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.65;
}

/* Thumbnail preview */
.pcard__preview {
    width: 172px;
    height: 108px;
    border-radius: var(--r-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    flex-shrink: 0;
    position: relative;
    transition: border-color var(--t), transform var(--t) var(--ease-spring);
}
.pcard__preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top left;
    display: block;
    transition: transform 0.5s var(--ease), filter 0.3s;
    filter: brightness(0.82) saturate(0.85);
    cursor: zoom-in;
}
.pcard__preview-overlay {
    position: absolute;
    inset: 0;
    background: rgba(129,140,248,0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-size: 0.66rem;
    color: rgba(255,255,255,0.9);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0;
    transition: opacity var(--t);
    backdrop-filter: blur(2px);
    pointer-events: none;
}
.pcard:hover .pcard__preview { border-color: var(--border-hi); transform: translateY(-2px); }
.pcard:hover .pcard__preview img { transform: scale(1.06); filter: brightness(1) saturate(1); }
.pcard:hover .pcard__preview-overlay { opacity: 1; }

.pcard__chevron {
    color: var(--text-dim);
    flex-shrink: 0;
    margin-top: 2px;
    transition: transform var(--t) var(--ease), color var(--t);
}
.pcard.open .pcard__chevron { transform: rotate(180deg); color: var(--accent); }

/* Card body (accordion) */
.pcard__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.45s var(--ease);
}
.pcard.open .pcard__body { max-height: 1400px; }

/* Detail layout */
.pdetail {
    padding: 20px 24px 24px;
    border-top: 1px solid var(--border);
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 20px 28px;
}

.pdetail__screenshot {
    grid-column: 1;
    grid-row: 1;
}

.pdetail__cols {
    grid-column: 2;
    grid-row: 1;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.pdetail__stack {
    grid-column: 1 / -1;
    grid-row: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

/* Browser mockup frame */
.mockup {
    border-radius: var(--r-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-surface);
    box-shadow: var(--shadow);
    transition: border-color var(--t);
}
.pcard:hover .mockup { border-color: var(--border-glow); }

.mockup__bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 13px;
    background: rgba(0,0,0,0.35);
    border-bottom: 1px solid var(--border);
}

.m-dot { width: 9px; height: 9px; border-radius: 50%; flex-shrink: 0; }
.m-dot--r { background: #ff5f57; }
.m-dot--y { background: #febc2e; }
.m-dot--g { background: #28c840; }

.mockup__addr {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border-radius: 4px;
    padding: 3px 10px;
    font-family: var(--mono);
    font-size: 0.67rem;
    color: var(--text-dim);
    margin-left: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mockup__img {
    width: 100%;
    display: block;
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: top;
    transition: transform 0.5s var(--ease);
    cursor: zoom-in;
}
.pcard:hover .mockup__img { transform: scale(1.015); }

/* Detail columns */
.pdetail__h {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.role-tag {
    font-family: var(--font);
    text-transform: none;
    letter-spacing: 0;
    font-size: 0.7rem;
    padding: 2px 8px;
    border-radius: 100px;
    background: rgba(192,132,252,0.1);
    color: var(--accent-2);
    font-weight: 600;
}

.pdetail__cta {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 14px;
    padding: 8px 16px;
    border-radius: 100px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--accent-3);
    background: rgba(52,211,153,0.1);
    border: 1px solid rgba(52,211,153,0.3);
    text-decoration: none;
    transition: background 0.2s ease, transform 0.2s ease;
}
.pdetail__cta:hover {
    background: rgba(52,211,153,0.18);
    transform: translateY(-1px);
}

.pdetail__access { margin-top: 14px; }
.pdetail__lock {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 100px;
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-dim);
    background: rgba(255,255,255,0.03);
    border: 1px dashed var(--border);
}

.pdetail__list { display: flex; flex-direction: column; gap: 7px; }
.pdetail__list li {
    font-size: 0.83rem;
    color: var(--text-muted);
    padding-left: 14px;
    position: relative;
    line-height: 1.65;
}
.pdetail__list li::before {
    content: '›';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}
.pdetail__list li strong { color: var(--text); }

.stk {
    font-family: var(--mono);
    font-size: 0.71rem;
    padding: 3px 11px;
    border-radius: 100px;
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    color: var(--text-dim);
    transition: all var(--t);
}
.stk:hover { border-color: var(--border-hi); color: var(--text-muted); }

/* =====================================================
   Education
   ===================================================== */
.education { background: var(--bg-surface); }

.edu-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.edu-card, .cert-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    padding: 28px;
    display: flex;
    gap: 18px;
    align-items: flex-start;
    transition: border-color var(--t), transform var(--t) var(--ease), box-shadow var(--t);
    position: relative;
    overflow: hidden;
}
.edu-card::before, .cert-card::before {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: var(--grad);
    transform: scaleX(0);
    transition: transform var(--t-md) var(--ease);
}
.edu-card:hover, .cert-card:hover {
    border-color: var(--border-hi);
    transform: translateY(-4px);
    box-shadow: var(--glow);
}
.edu-card:hover::before, .cert-card:hover::before { transform: scaleX(1); }

.edu-card__icon, .cert-card__icon { font-size: 1.9rem; flex-shrink: 0; line-height: 1; }

.edu-card__title, .cert-card__title { font-size: 1rem; font-weight: 700; margin-bottom: 5px; }
.edu-card__sub { font-size: 0.83rem; color: var(--accent); margin-bottom: 4px; }
.edu-card__period, .cert-card__date {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    margin-bottom: 12px;
}

.edu-card__detail { display: flex; flex-direction: column; gap: 5px; }
.edu-card__detail li {
    font-size: 0.81rem;
    color: var(--text-muted);
    padding-left: 10px;
    position: relative;
}
.edu-card__detail li::before { content: '·'; position: absolute; left: 0; color: var(--accent); }
.cert-card__org { font-size: 0.82rem; color: var(--text-muted); margin-bottom: 4px; }

/* =====================================================
   Contact
   ===================================================== */
.contact__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 18px;
}

.ccard {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 24px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--r);
    transition: all var(--t) var(--ease);
    position: relative;
    overflow: hidden;
}
.ccard::after {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--grad-subtle);
    opacity: 0;
    transition: opacity var(--t);
}
.ccard:hover {
    border-color: var(--border-hi);
    transform: translateY(-5px);
    box-shadow: var(--glow);
}
.ccard:hover::after { opacity: 1; }

.ccard__icon {
    width: 48px; height: 48px;
    border-radius: var(--r-sm);
    background: rgba(129,140,248,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent);
    flex-shrink: 0;
    transition: background var(--t), transform var(--t) var(--ease-spring);
    position: relative; z-index: 1;
}
.ccard:hover .ccard__icon {
    background: rgba(129,140,248,0.2);
    transform: scale(1.1) rotate(-5deg);
}

.ccard__text { position: relative; z-index: 1; }
.ccard__title { font-size: 0.93rem; font-weight: 600; margin-bottom: 3px; }
.ccard__sub   { font-family: var(--mono); font-size: 0.72rem; color: var(--text-dim); }

/* =====================================================
   Footer
   ===================================================== */
.footer {
    padding: 36px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-surface);
}
.footer__inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}
.footer p { font-size: 0.82rem; color: var(--text-dim); }
.footer__sub { font-family: var(--mono); font-size: 0.73rem !important; }

/* =====================================================
   Scroll-to-top
   ===================================================== */
.scroll-top {
    position: fixed;
    bottom: 28px; right: 28px;
    width: 44px; height: 44px;
    border-radius: 50%;
    background: var(--bg-card-2);
    border: 1px solid var(--border-hi);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transform: translateY(12px) scale(0.9);
    transition: all var(--t) var(--ease-spring);
    z-index: 90;
    box-shadow: var(--glow-sm);
}
.scroll-top.visible { opacity: 1; pointer-events: all; transform: translateY(0) scale(1); }
.scroll-top:hover {
    background: rgba(129,140,248,0.15);
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--glow);
}

/* =====================================================
   Animations
   ===================================================== */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes blink {
    0%,100% { opacity: 1; }
    50%      { opacity: 0; }
}
@keyframes scrollAnim {
    0%   { transform: translateX(-50%) translateY(0); opacity: 1; }
    100% { transform: translateX(-50%) translateY(14px); opacity: 0; }
}
@keyframes pulse {
    0%,100% { box-shadow: 0 0 0 0 rgba(52,211,153,0.4); }
    50%      { box-shadow: 0 0 0 7px rgba(52,211,153,0); }
}
@keyframes shimmer {
    0%   { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* =====================================================
   Responsive 1024px
   ===================================================== */
@media (max-width: 1024px) {
    .hero__container { grid-template-columns: 1fr; gap: 48px; }
    .hero__code-block { max-width: 560px; }
    .about__grid { grid-template-columns: 1fr; }
    .skills__grid { grid-template-columns: repeat(2, 1fr); }
    .contact__grid { grid-template-columns: repeat(2, 1fr); }
}

/* =====================================================
   Responsive 768px
   ===================================================== */
@media (max-width: 768px) {
    .section { padding: 72px 0; }

    .nav__list {
        position: fixed;
        top: var(--nav-h); left: 0; right: 0;
        background: rgba(10,10,14,0.97);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column;
        padding: 24px 28px;
        gap: 20px;
        border-bottom: 1px solid var(--border);
        transform: translateY(-110%);
        opacity: 0;
        pointer-events: none;
        transition: all var(--t-md) var(--ease);
    }
    .nav__list.open { transform: translateY(0); opacity: 1; pointer-events: all; }
    .nav__hamburger { display: flex; }

    .stats__grid { grid-template-columns: repeat(2, 1fr); }
    .stat-item:nth-child(2) { border-right: none; }
    .stat-item:nth-child(1), .stat-item:nth-child(2) { border-bottom: 1px solid var(--border); }

    .hero__name { font-size: 3rem; }
    .hero__code-block { display: none; }

    .timeline { padding-left: 0; }
    .timeline::before { display: none; }
    .timeline__item { grid-template-columns: 1fr; gap: 8px; }
    .tl-meta { flex-direction: row; align-items: center; padding-right: 0; padding-top: 0; gap: 10px; }
    .tl-dot { position: static; }
    .tl-period { text-align: left; }

    .pcard__preview { display: none; }

    .pdetail {
        grid-template-columns: 1fr;
        grid-template-rows: auto;
    }
    .pdetail__screenshot { grid-column: 1; grid-row: 1; }
    .pdetail__cols       { grid-column: 1; grid-row: 2; }
    .pdetail__stack      { grid-column: 1; grid-row: 3; }

    .edu-grid { grid-template-columns: 1fr; }
    .skills__grid { grid-template-columns: 1fr; }
}

/* =====================================================
   Responsive 480px
   ===================================================== */
@media (max-width: 480px) {
    .contact__grid { grid-template-columns: 1fr; }
    .hero__actions { flex-direction: column; }
    .hero__actions .btn { justify-content: center; }
    .footer__inner { flex-direction: column; text-align: center; }
    .container { padding: 0 18px; }
}

/* =====================================================
   Image lightbox
   ===================================================== */
.lightbox {
    position: fixed;
    inset: 0;
    z-index: 2000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5vh 5vw;
    background: rgba(8, 10, 16, 0.88);
    backdrop-filter: blur(6px);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    cursor: zoom-out;
}
.lightbox.open {
    opacity: 1;
    visibility: visible;
}
.lightbox__img {
    max-width: 100%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 10px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    cursor: default;
    transform: scale(0.96);
    transition: transform 0.25s ease;
}
.lightbox.open .lightbox__img {
    transform: scale(1);
}
.lightbox__close {
    position: absolute;
    top: 22px;
    right: 26px;
    width: 42px;
    height: 42px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    border: 1px solid rgba(255,255,255,0.2);
    background: rgba(255,255,255,0.08);
    color: #fff;
    cursor: pointer;
    transition: background 0.2s ease;
}
.lightbox__close:hover {
    background: rgba(255,255,255,0.18);
}