/* ============================================================
   ufna.dev — shared design system
   "Engineering spec sheet": graphite + amber, IBM Plex
   ============================================================ */

@import url('../fonts/fonts.css?v=b898f721');

:root {
    --bg:          #101113;
    --surface:     #15171A;
    --line:        #2A2C30;
    --line-strong: #4A4E54;
    --text:        #E8E6E1;
    --text-dim:    #7D848C;
    --accent:      #FFB000;
    --accent-dim:  rgba(255, 176, 0, 0.10);
    --radius:      4px;
    --font-sans:   'IBM Plex Sans', 'Helvetica Neue', Arial, sans-serif;
    --font-mono:   'IBM Plex Mono', 'SFMono-Regular', Consolas, monospace;
}

/* ---- Base ---- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-sans);
    font-weight: 400;
    font-size: 16px;
    line-height: 1.6;
    background: var(--bg);
    color: var(--text);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a { color: inherit; }

img { max-width: 100%; display: block; }

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 24px;
}

::selection { background: var(--accent); color: #101113; }

/* ---- Navigation ---- */
.site-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    padding: 16px 0;
    border-bottom: 1px solid transparent;
    transition: background 0.3s, border-color 0.3s;
}
.site-nav.scrolled {
    background: rgba(16, 17, 19, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom-color: var(--line);
}
.site-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.nav-brand {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.02em;
}
.nav-brand:hover { color: var(--accent); }
.nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
}
.nav-links a {
    color: var(--text-dim);
    text-decoration: none;
    padding: 4px 8px;
    transition: color 0.2s;
}
.nav-links a::before { content: '['; color: transparent; transition: color 0.2s; }
.nav-links a::after  { content: ']'; color: transparent; transition: color 0.2s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::before, .nav-links a:hover::after,
.nav-links a.active::before, .nav-links a.active::after { color: var(--accent); }
.nav-github {
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
    color: var(--text-dim);
    transition: color 0.2s;
}
.nav-github::before, .nav-github::after { content: none; }
.nav-github svg { width: 18px; height: 18px; }
.nav-github:hover { color: var(--accent); }

/* Mobile menu */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    width: 28px; height: 20px;
    position: relative;
    cursor: pointer;
    z-index: 200;
    padding: 0;
}
.nav-toggle span {
    position: absolute;
    left: 0;
    width: 100%; height: 2px;
    background: var(--text);
    transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle span:first-child { top: 3px; }
.nav-toggle span:last-child { bottom: 3px; }
.nav-toggle.active span:first-child { top: 9px; transform: rotate(45deg); }
.nav-toggle.active span:last-child { bottom: 9px; transform: rotate(-45deg); }

.nav-overlay {
    position: fixed;
    inset: 0;
    background: var(--bg);
    z-index: 150;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 32px;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}
.nav-overlay.active { opacity: 1; visibility: visible; }
.nav-overlay a {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    color: var(--text);
    text-decoration: none;
}
.nav-overlay a:hover { color: var(--accent); }

/* ---- Hero: spec sheet ---- */
.hero {
    position: relative;
    padding: 160px 0 96px;
    overflow: hidden;
}
.hero-grid-bg {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(120, 130, 140, 0.07) 1px, transparent 1px),
        linear-gradient(90deg, rgba(120, 130, 140, 0.07) 1px, transparent 1px);
    background-size: 28px 28px;
    mask-image: linear-gradient(to bottom, black 60%, transparent);
    -webkit-mask-image: linear-gradient(to bottom, black 60%, transparent);
}
.hero .container {
    position: relative;
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 48px;
    align-items: start;
}
.hero-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    color: var(--accent);
    margin-bottom: 20px;
}
.hero-name {
    font-weight: 700;
    font-size: clamp(2.6rem, 6vw, 4.4rem);
    line-height: 1.04;
    letter-spacing: -0.02em;
    margin: 0 0 24px;
}
.hero-sub {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-dim);
    line-height: 1.9;
    margin: 0;
}
.hero-sub .sep { color: var(--line-strong); padding: 0 4px; }
.caret {
    display: inline-block;
    width: 8px;
    height: 1.05em;
    margin-left: 6px;
    vertical-align: text-bottom;
    background: var(--accent);
    animation: blink 1.1s steps(1) infinite;
}
@keyframes blink { 50% { opacity: 0; } }
.hero-stamp {
    position: absolute;
    right: 24px;
    bottom: -56px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    color: var(--text-dim);
    opacity: 0.65;
    user-select: none;
}

.facts-panel {
    border: 1px solid var(--line-strong);
    background: var(--surface);
    border-radius: var(--radius);
    padding: 20px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
}
.facts-head {
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    color: var(--text-dim);
    border-bottom: 1px solid var(--line);
    padding-bottom: 10px;
    margin-bottom: 6px;
}
.fact-row {
    display: block;
    padding: 8px 0;
    text-decoration: none;
    line-height: 1.5;
}
.fact-row + .fact-row { border-top: 1px solid var(--line); }
.fact-row .marker { color: var(--accent); margin-right: 8px; }
.fact-row .k { color: var(--text); font-weight: 500; }
.fact-row .v { color: var(--text-dim); }
.fact-row:hover .k { color: var(--accent); }

/* ---- Sections ---- */
.section {
    padding: 96px 0 0;
}
.section-inner {
    position: relative;
    border-top: 1px solid var(--line);
    padding-top: 48px;
}
.ghost-num {
    position: absolute;
    top: 24px;
    right: 0;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: clamp(4rem, 9vw, 7.5rem);
    line-height: 1;
    color: transparent;
    -webkit-text-stroke: 1px rgba(125, 132, 140, 0.16);
    user-select: none;
    pointer-events: none;
}
.section-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 500;
    letter-spacing: 0.22em;
    color: var(--accent);
    margin-bottom: 32px;
}
.section-label .num { color: var(--text-dim); }

/* ---- 01 Profile ---- */
.profile { max-width: 720px; }
.profile-text {
    font-size: 1.05rem;
    line-height: 1.75;
    color: var(--text);
    margin: 0 0 20px;
}
.profile-text:last-of-type { color: var(--text-dim); }
.profile-oss {
    display: inline-block;
    margin-top: 8px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-dim);
    text-decoration: none;
    transition: color 0.2s;
}
.profile-oss .marker { color: var(--accent); }
.profile-oss:hover { color: var(--accent); }

/* ---- 02 Track Record: timeline ---- */
.track-list {
    position: relative;
    padding: 8px 0;
}
.track-list::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0;
    left: 116px;
    width: 1px;
    background: linear-gradient(to bottom, var(--line) 0%, var(--line-strong) 50%, transparent 100%);
}
.track-row {
    position: relative;
    display: grid;
    grid-template-columns: 96px 1fr;
    gap: 44px;
    align-items: baseline;
    padding: 14px 0;
}
.track-row::before {
    content: '';
    position: absolute;
    left: 113px;
    top: 22px;
    width: 7px;
    height: 7px;
    background: var(--bg);
    border: 1.5px solid var(--accent);
    transform: rotate(45deg);
    transition: background 0.2s;
}
.track-row:hover::before { background: var(--accent); }
.track-year {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--accent);
    white-space: nowrap;
    text-align: right;
}
.track-text {
    font-size: 0.95rem;
    color: var(--text);
}
.track-text .hl {
    font-family: var(--font-mono);
    color: var(--accent);
}

/* ---- 03 Recognition ---- */
.callout-award {
    border: 1px solid var(--line);
    border-left: 3px solid var(--accent);
    background: linear-gradient(90deg, var(--accent-dim), transparent 55%) var(--surface);
    border-radius: 0 var(--radius) var(--radius) 0;
    padding: 28px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    flex-wrap: wrap;
}
.award-body { flex: 1 1 320px; }
.award-title {
    font-weight: 700;
    font-size: 1.3rem;
    margin: 0 0 6px;
}
.award-desc {
    color: var(--text-dim);
    font-size: 0.95rem;
    margin: 0;
    max-width: 560px;
}
.award-year {
    display: inline-block;
    margin-top: 14px;
    font-family: var(--font-mono);
    font-weight: 500;
    color: var(--accent);
    font-size: 1rem;
}
.award-figure {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}
.award-dots {
    display: flex;
    flex-direction: column;
    gap: 12px;
}
.award-dot {
    width: 9px;
    height: 9px;
    padding: 0;
    background: var(--bg);
    border: 1.5px solid var(--line-strong);
    border-radius: 50%;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}
.award-dot:hover { border-color: var(--accent); }
.award-dot.is-active { background: var(--accent); border-color: var(--accent); }
.award-media {
    position: relative;
    width: 180px;
    aspect-ratio: 1 / 1;
    flex-shrink: 0;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
}
.award-media img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: saturate(0.85);
    opacity: 0;
    transition: opacity 1.2s ease;
}
.award-media img.is-shown { opacity: 1; }

/* Row hover tint (no layout shift) */
.talk-row, .scope-row { position: relative; }
.talk-row::after, .scope-row::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, var(--accent-dim), transparent 40%);
    opacity: 0;
    transition: opacity 0.25s;
    pointer-events: none;
}
.talk-row:hover::after, .scope-row:hover::after { opacity: 1; }

/* ---- 04 Talks ---- */
.talk-row {
    display: grid;
    grid-template-columns: 64px 1fr auto;
    gap: 20px;
    align-items: baseline;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}
.talks-list { border-top: 1px solid var(--line); }
.talk-year {
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--accent);
    padding-left: 10px;
}
.talk-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text);
    margin: 0 0 2px;
    line-height: 1.45;
}
.talk-original {
    font-size: 0.85rem;
    font-style: italic;
    color: var(--text-dim);
    margin: 0 0 2px;
}
.talk-venue {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
    margin: 0;
}
.talk-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent);
    text-decoration: none;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.talk-link:hover { text-decoration: underline; text-underline-offset: 3px; }
.talks-more {
    display: inline-block;
    margin-top: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-dim);
    text-decoration: none;
}
.talks-more:hover { color: var(--accent); }

/* ---- 05 Scope ---- */
.scope-table { border-top: 1px solid var(--line); }
.scope-row {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    align-items: baseline;
    padding: 18px 0;
    border-bottom: 1px solid var(--line);
}
.scope-domain {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text);
    padding-left: 10px;
}
.scope-desc {
    font-size: 0.95rem;
    color: var(--text-dim);
}

/* ---- 06 Contact ---- */
.contact-channels {
    display: flex;
    gap: 24px 64px;
    flex-wrap: wrap;
}
.contact-label {
    display: block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 4px;
}
.contact-email {
    display: inline-block;
    font-family: var(--font-mono);
    font-weight: 500;
    font-size: clamp(1.4rem, 3.5vw, 2.2rem);
    color: var(--text);
    text-decoration: none;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 4px;
    margin: 8px 0 32px;
    transition: color 0.2s;
}
.contact-email:hover { color: var(--accent); }

/* ---- Footer ---- */
.site-footer {
    margin-top: 96px;
    border-top: 1px solid var(--line);
    padding: 32px 0;
}
.site-footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-dim);
}
.footer-social {
    display: flex;
    align-items: center;
    gap: 20px;
}
.footer-icon {
    display: inline-flex;
    color: var(--text-dim);
    transition: color 0.2s, transform 0.2s;
}
.footer-icon svg { width: 18px; height: 18px; }
.footer-icon:hover { color: var(--accent); transform: translateY(-1px); }

/* ---- Speaking page ---- */
.page-head { padding: 140px 0 0; }
.back-link {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
    text-decoration: none;
    display: inline-block;
    margin-bottom: 40px;
}
.back-link:hover { color: var(--accent); }
.page-title {
    font-weight: 700;
    font-size: clamp(2rem, 5vw, 3.2rem);
    line-height: 1.08;
    letter-spacing: -0.02em;
    margin: 0 0 40px;
}
.speaking-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 48px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    padding: 24px 0;
    font-family: var(--font-mono);
}
.sstat-num {
    font-weight: 500;
    font-size: 1.6rem;
    color: var(--text);
}
.sstat-num .u { color: var(--accent); }
.sstat-label {
    font-size: 0.7rem;
    letter-spacing: 0.16em;
    color: var(--text-dim);
    margin-top: 4px;
}

.filter-bar {
    position: sticky;
    top: 57px;
    z-index: 50;
    background: rgba(16, 17, 19, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: 16px 0;
    border-bottom: 1px solid var(--line);
}
.filter-tabs {
    display: inline-flex;
    gap: 4px;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}
.filter-tab {
    background: none;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    color: var(--text-dim);
    font-family: inherit;
    font-size: inherit;
    padding: 6px 14px;
    cursor: pointer;
    transition: color 0.2s, border-color 0.2s, background 0.2s;
    white-space: nowrap;
}
.filter-tab:hover { color: var(--text); border-color: var(--line-strong); }
.filter-tab.active {
    color: #101113;
    background: var(--accent);
    border-color: var(--accent);
    font-weight: 500;
}

.category-head {
    display: flex;
    align-items: baseline;
    gap: 16px;
    margin-bottom: 24px;
}
.category-title {
    font-weight: 700;
    font-size: 1.3rem;
    margin: 0;
}
.category-count {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* ---- Reveal (progressive enhancement, JS only) ---- */
html.js .reveal {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
html.js .reveal.in-view {
    opacity: 1;
    transform: translateY(0);
}

/* Hero load cascade */
html.js .hero-label,
html.js .hero-name,
html.js .hero-sub { opacity: 0; animation: rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards; }
html.js .facts-panel { opacity: 0; animation: rise 0.7s cubic-bezier(0.16, 1, 0.3, 1) 0.35s forwards; }
html.js .hero-label { animation-delay: 0.05s; }
html.js .hero-name  { animation-delay: 0.15s; }
html.js .hero-sub   { animation-delay: 0.25s; }

@keyframes rise {
    from { opacity: 0; transform: translateY(28px); }
    to   { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }
    html.js .reveal,
    html.js .hero-label, html.js .hero-name,
    html.js .hero-sub, html.js .facts-panel {
        opacity: 1;
        transform: none;
    }
}

/* ---- Mobile ---- */
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .nav-links { display: none; }

    .hero { padding: 120px 0 64px; }
    .hero-label { font-size: 0.7rem; letter-spacing: 0.12em; }
    .hero .container { grid-template-columns: 1fr; gap: 40px; }

    .section { padding: 64px 0 0; }
    .section-inner { padding-top: 40px; }

    .track-row { grid-template-columns: 72px 1fr; gap: 28px; }
    .award-figure { width: 100%; }
    .award-media { flex: 1; max-width: 300px; aspect-ratio: 16 / 10; }
    .track-list::before { left: 84px; }
    .track-row::before { left: 81px; }
    .ghost-num { font-size: 3.2rem; top: 40px; }
    .hero-stamp { display: none; }

    .talk-row { grid-template-columns: 52px 1fr; }
    .talk-row .talk-link { grid-column: 2; justify-self: start; }

    .scope-row { grid-template-columns: 1fr; gap: 4px; }

    .speaking-stats { gap: 32px; }
    .filter-bar { top: 53px; }

    .site-footer .container { flex-direction: column; }
}