/* ============================================================
   ENGINEER MONO DESIGN SYSTEM
   Clean, precise, monospace-first aesthetic with rich interactive animations
   ============================================================ */

:root {
    /* Color Palette */
    --bg-main:       #0D0E12;
    --bg-card:       #13161C;
    --bg-card-hover: #181C25;
    --bg-subtle:     #1A1D26;
    
    --border:        #232834;
    --border-hover:  #3A4256;
    
    --accent-green:  #10B981;
    --accent-cyan:   #06B6D4;
    --accent-purple: #A855F7;
    --accent-blue:   #3B82F6;
    --accent-amber:  #F59E0B;
    
    --text-main:     #F1F5F9;
    --text-muted:    #94A3B8;
    --text-dim:      #64748B;
    
    /* Typography */
    --font-mono: 'JetBrains Mono', monospace;
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    
    --radius: 6px;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-main);
    font-family: var(--font-sans);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

.wrap {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Monospace Utilities */
.mono {
    font-family: var(--font-mono);
}

/* Scroll Reveal Animation */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.on {
    opacity: 1;
    transform: none;
}

/* Header & Navigation Bar */
.nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(13, 14, 18, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.nav-in {
    max-width: 1040px;
    margin: 0 auto;
    padding: 0.85rem 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--accent-green);
    text-decoration: none;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links {
    display: flex;
    gap: 1.25rem;
    list-style: none;
}

.nav-links a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.nav-links a:hover {
    color: var(--text-main);
}

/* Dual Language Switcher Widget */
.lang-switch {
    display: inline-flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-subtle);
}

.lang-btn {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    background: transparent;
    border: none;
    color: var(--text-dim);
    cursor: pointer;
    transition: all 0.15s ease;
}

.lang-btn:hover {
    color: var(--text-main);
}

.lang-btn.active {
    background: var(--accent-green);
    color: #050B14;
}

/* Hero Section */
.hero {
    padding: 4rem 0 3rem;
    border-bottom: 1px solid var(--border);
}

.hero-h1 {
    font-family: var(--font-sans);
    font-size: 2.35rem;
    font-weight: 700;
    letter-spacing: -0.3px;
    margin-bottom: 0.5rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.55rem;
    line-height: 1.2;
}

.hero-firstname, .hero-lastname {
    display: inline-block;
}

.hero-city {
    font-size: 1.05rem;
    font-weight: 400;
    color: var(--text-dim);
    font-family: var(--font-sans);
    display: inline-block;
    vertical-align: middle;
    margin-left: 0.1rem;
    transform: translateY(3px);
    opacity: 0.85;
}

.pill-mono {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.08);
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 0.3rem 0.8rem;
    border-radius: var(--radius);
    margin: 0.75rem 0 1.25rem 0;
}

.hero-tagline {
    font-family: var(--font-mono);
    font-size: 1.15rem;
    color: var(--accent-green);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.hero-lead {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 760px;
    margin-bottom: 2rem;
}

.cta-strip {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.cta {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 0.5rem 1.1rem;
    border-radius: var(--radius);
    text-decoration: none;
    border: 1px solid var(--border);
    color: var(--text-main);
    background: var(--bg-card);
    transition: all 0.15s ease;
}

.cta:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.cta-main {
    background: var(--accent-green);
    color: #050B14;
    border-color: var(--accent-green);
}

.cta-main:hover {
    background: #0ea5e9;
    border-color: #0ea5e9;
    color: #fff;
}

/* Key Metrics Strip */
.stats-strip {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 1.5rem;
}

.stat-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
}

.stat-val {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--accent-green);
    margin-bottom: 0.2rem;
}

.stat-lbl {
    font-size: 0.82rem;
    color: var(--text-muted);
}

/* Social Links */
.social-strip {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-top: 1.5rem;
}

.social-pill {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.15s ease;
}

.social-pill:hover {
    color: var(--accent-green);
    border-color: var(--accent-green);
    background: rgba(16, 185, 129, 0.05);
}

/* Section Styling */
section {
    padding: 3rem 0;
    border-bottom: 1px solid var(--border);
}

.sec-head {
    margin-bottom: 2rem;
}

.sec-title {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sec-desc {
    color: var(--text-muted);
    font-size: 0.92rem;
    margin-top: 0.3rem;
}

/* Grid Layouts & Notes */
.grid3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.2rem;
    margin-top: 1.25rem;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.note {
    padding: 1.35rem;
}

.note h3 {
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--text-main);
}

.note h3 span {
    color: var(--accent-cyan);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    margin-right: 0.45rem;
}

.note.p h3 span {
    color: var(--accent-purple);
}

.note.g h3 span {
    color: var(--accent-green);
}

.note p {
    color: var(--text-muted);
    font-size: 0.88rem;
}

/* Callout Box */
.callout {
    padding: 1.5rem 1.7rem;
    border-left: 3px solid var(--accent-purple);
    background: var(--bg-card);
    border-radius: 0 var(--radius) var(--radius) 0;
}

.callout p {
    color: var(--text-muted);
    font-size: 0.92rem;
}

.callout p + p {
    margin-top: 0.8rem;
}

.callout b {
    color: var(--text-main);
}

/* Method List */
.method {
    padding: 1.5rem 1.7rem;
    font-size: 0.88rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.method h3 {
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.6px;
    margin-bottom: 0.9rem;
}

.method dl {
    display: grid;
    grid-template-columns: minmax(0, 180px) 1fr;
    gap: 0.5rem 1.2rem;
}

.method dt {
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.8rem;
}

.method dd {
    color: var(--text-muted);
}

.method .caveat {
    margin-top: 1.1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* Flagship Cards */
.flagship-grid {
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

.flag-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: border-color 0.2s ease, background-color 0.2s ease;
    text-decoration: none;
    color: inherit;
    display: block;
}

.flag-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.flag-card-top {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.flag-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--accent-green);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.25);
    padding: 0.2rem 0.6rem;
    border-radius: var(--radius);
}

.flag-tag.tag-purple {
    color: var(--accent-purple);
    background: rgba(168, 85, 247, 0.1);
    border-color: rgba(168, 85, 247, 0.25);
}

.flag-tag.tag-blue {
    color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.1);
    border-color: rgba(59, 130, 246, 0.25);
}

.flag-title {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.flag-hook {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent-green);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.flag-card.v-purple .flag-hook { color: var(--accent-purple); }
.flag-card.v-blue .flag-hook { color: var(--accent-blue); }

.flag-desc {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1.2rem;
}

/* Card Interactive Mini Widgets */
.mini {
    margin-top: 1.1rem;
    height: 28px;
    display: flex;
    align-items: flex-end;
    gap: 3px;
    width: 100%;
}
.mini i {
    display: block;
    border-radius: 1px;
    background: currentColor;
    opacity: 0.18;
    transition: opacity 0.15s ease;
}

.mini.toks {
    color: var(--accent-green);
    display: grid;
    grid-template-columns: repeat(55, 1fr);
    gap: 2px;
    height: 20px;
    width: 100%;
}
.mini.toks i {
    width: 100%;
    height: 14px;
}
.flag-card:hover .mini.toks i { opacity: 1; }

.mini.dots { color: var(--accent-purple); gap: 0; position: relative; height: 34px; width: 100%; }
.mini.dots i {
    position: absolute; width: 7px; height: 7px; border-radius: 50%;
    opacity: 0.2; transition: opacity 0.3s ease, transform 0.3s ease;
}
.flag-card:hover .mini.dots i { opacity: 1; transform: scale(1.2); }

.mini.lines { color: var(--accent-blue); flex-direction: column; align-items: flex-start; gap: 4px; height: 28px; width: 100%; }
.mini.lines i {
    height: 4px; border-radius: 2px; width: 0;
    opacity: 0.3; transition: width 0.4s ease, opacity 0.3s ease;
}
.flag-card:hover .mini.lines i { opacity: 1; }

.flag-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 1.25rem;
    background: rgba(0, 0, 0, 0.25);
    padding: 0.85rem 1rem;
    border-radius: var(--radius);
    border: 1px solid rgba(255, 255, 255, 0.04);
}

.flag-bullets li {
    font-size: 0.88rem;
    color: var(--text-muted);
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.flag-bullets li::before {
    content: "•";
    color: var(--accent-green);
    font-weight: bold;
}

.flag-card.v-purple .flag-bullets li::before { color: var(--accent-purple); }
.flag-card.v-blue .flag-bullets li::before { color: var(--accent-blue); }

.flag-foot {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    padding-top: 0.75rem;
    border-top: 1px solid var(--border);
}

.tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tech-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    background: var(--bg-subtle);
    border: 1px solid var(--border);
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
}

.read-case-btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-green);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: transform 0.15s ease;
}

.flag-card:hover .read-case-btn {
    transform: translateX(4px);
}

.flag-card.v-purple .read-case-btn { color: var(--accent-purple); }
.flag-card.v-blue .read-case-btn { color: var(--accent-blue); }

/* Other Projects Grid */
.other-projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(310px, 1fr));
    gap: 1.25rem;
}

.other-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: border-color 0.2s ease;
}

.other-card:hover {
    border-color: var(--border-hover);
}

.other-title {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 0.4rem;
}

.other-desc {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
    flex-grow: 1;
}

/* Early Projects Layout */
.early-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.early-row {
    display: grid;
    grid-template-columns: minmax(0, 200px) 1fr;
    gap: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.early-area {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--accent-cyan);
}

.early-area span {
    font-size: 0.8rem;
    font-weight: 400;
    color: var(--text-dim);
    display: block;
}

.early-items p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.early-items p:last-child {
    margin-bottom: 0;
}

.early-items p b {
    color: var(--text-main);
}

.early-items p i {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    font-style: normal;
    display: block;
    margin-top: 0.2rem;
}

/* Path / Timeline Layout */
.about-card {
    padding: 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 1.75rem;
}

.about-card p {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.about-card p:last-child {
    margin-bottom: 0;
}

.path-list {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.path-row {
    display: grid;
    grid-template-columns: minmax(0, 140px) 1fr;
    gap: 1.25rem;
    padding: 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.path-when {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-green);
    font-weight: 600;
}

.path-what b {
    font-family: var(--font-mono);
    font-size: 1.05rem;
    color: var(--text-main);
    display: block;
    margin-bottom: 0.3rem;
}

.path-what p {
    font-size: 0.9rem;
    color: var(--text-muted);
}

.path-what a {
    color: var(--accent-cyan);
    text-decoration: none;
}

.path-what a:hover {
    text-decoration: underline;
}

/* Skills Matrix Table */
.skills-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1rem;
}

.skills-table td {
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--border);
    vertical-align: top;
    font-size: 0.9rem;
}

.skills-table td:first-child {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-main);
    width: 32%;
}

.skills-table td:last-child {
    color: var(--text-muted);
}

.skills-table a {
    color: var(--accent-green);
    text-decoration: none;
}

.skills-table a:hover {
    text-decoration: underline;
}

/* WebGPU Interactive Token Race & Dial */
.race {
    padding: 1.75rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.race-head {
    display: flex; flex-wrap: wrap; gap: 0.8rem;
    align-items: baseline; justify-content: space-between; margin-bottom: 1.4rem;
}

.race-tempo { font-family: var(--font-mono); font-size: 0.78rem; color: var(--text-dim); }

.btn-action {
    font-family: var(--font-mono); font-size: 0.78rem;
    color: var(--text-muted); background: transparent;
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 0.3rem 0.85rem; cursor: pointer;
    transition: color 0.2s, border-color 0.2s;
}
.btn-action:hover { color: var(--accent-green); border-color: var(--accent-green); }

.lane {
    display: grid;
    grid-template-columns: minmax(0, 210px) 1fr minmax(0, 96px);
    gap: 1.1rem; align-items: center;
    padding: 0.7rem 0.8rem; border-radius: var(--radius);
}
.lane + .lane { margin-top: 0.35rem; }
.lane.hero-lane { background: rgba(16, 185, 129, 0.08); border: 1px solid rgba(16, 185, 129, 0.25); }
.lane-name { font-weight: 600; font-size: 0.95rem; font-family: var(--font-mono); }
.lane.hero-lane .lane-name { color: var(--accent-green); font-weight: 700; }
.lane-hw { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); line-height: 1.35; }

.toks-race { display: grid; grid-template-columns: repeat(30, 1fr); gap: 3px; }
.toks-race i {
    display: block; aspect-ratio: 1; border-radius: 1px;
    background: currentColor; opacity: 0;
    transition: opacity 0.12s linear;
}
.toks-race i.on { opacity: 1; }
.l-cpu { color: var(--text-dim); }
.l-metal { color: var(--accent-blue); }
.l-webgpu { color: var(--accent-green); }
.l-llama { color: var(--accent-purple); }

.lane-count { font-family: var(--font-mono); font-weight: 700; font-size: 1.35rem; text-align: right; }
.lane-count small { display: block; font-size: 0.62rem; font-weight: 400; color: var(--text-muted); letter-spacing: 0.4px; }

/* Dial Ring */
.dial { position: relative; width: 200px; height: 200px; flex: none; }
.dial svg { transform: rotate(-90deg); display: block; }
.dial .track { stroke: rgba(255, 255, 255, 0.06); }
.dial .arc { stroke: var(--accent-green); stroke-linecap: round; }
.dial-mid {
    position: absolute; inset: 0;
    display: flex; flex-direction: column;
    align-items: center; justify-content: center; gap: 2px;
}
.dial-num { font-family: var(--font-mono); font-weight: 700; font-size: 2.3rem; letter-spacing: -1px; }
.dial-unit { font-family: var(--font-mono); font-size: 0.8rem; color: var(--accent-green); }
.dial-cap { font-family: var(--font-mono); font-size: 0.68rem; color: var(--text-dim); text-align: center; }

/* Platform Chips */
.chips { display: flex; flex-wrap: wrap; justify-content: center; gap: 0.7rem; margin-top: 1rem; }
.chip {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    min-width: 120px; padding: 0.8rem 1rem;
    border: 1px solid var(--border); border-radius: var(--radius);
    background: var(--bg-card);
    font-size: 0.85rem; font-weight: 600; color: var(--accent-green);
    font-family: var(--font-mono);
    opacity: 0; transform: translateY(10px);
    transition: opacity 0.45s ease, transform 0.45s ease;
}
.chip.on { opacity: 1; transform: none; }
.chip .toks-race { grid-template-columns: repeat(6, 6px); gap: 3px; }
.chip .toks-race i { width: 6px; height: 6px; }
.chip.on .toks-race i { opacity: 1; }

/* Footer */
footer {
    padding: 3rem 0;
    text-align: center;
    color: var(--text-dim);
    font-family: var(--font-mono);
    font-size: 0.82rem;
}

@media (max-width: 820px) {
    .early-row, .path-row { grid-template-columns: 1fr; gap: 0.5rem; }
    .nav-links { display: none; }
}