/* ============================================================
   Carlos De Manuel — Analytics Engineer portfolio

   Design system: warm paper, petrol ink. Archivo / Public Sans / IBM Plex Mono.

   COLOUR RULES (hard, verified — run `python3 tools/contrast-check.py`)
     · Every colour is a token in :root. No hardcoded hex below this block.
     · --petrol-900 is the ink AND the only dark surface: the header and footer
       bands, with --sand-100 text. Never put --teal-500 on it (2.4:1).
     · --amber-500 and --sand-100 are never text on a light background.
       Fills, badges and charts only.
     · --rust-500 is graphical only (icons, rules, dots) — 3.4:1 on --surface.
       For rust *text* or a rust *fill with a white label*, use --rust-700.
     · Rust is an accent, not a field: one or two elements per viewport. The
       teal and the petrol carry the identity.
     · The freshness strip is the one loud element on the page. Everything
       else stays quiet on purpose.
   ============================================================ */

/* ---------- Tokens ---------- */
:root {
    /* Brand */
    --sand-100:   #F6E2B3;
    --amber-500:  #E7A84E;
    --rust-500:   #D96C2C;
    --teal-500:   #3E8E7E;
    --petrol-900: #274C56;

    /* Derived — required, do not substitute */
    --surface:    #FDFAF4;  /* page background */
    --surface-2:  #F5EFE3;  /* cards, sidebar, wells */
    --border:     #E4D9C4;  /* hairlines */
    --ink:        #274C56;  /* body text */
    --ink-muted:  #5C7480;  /* secondary text — on --surface only (4.6:1) */
    --rust-700:   #A8501F;  /* links, primary button fill (white label) */
    --teal-700:   #2E6B5E;  /* success, secondary button fill (white label) */
    --rust-050:   #FBEADF;  /* tint background */
    --teal-050:   #E4F0EC;  /* tint background */

    /* Added tokens. --ink-muted is 4.3:1 on --surface-2 and 4.2:1 on the
       tints, which fails AA for small text, so tinted surfaces get a darker
       muted ink. The two light-on-petrol tokens are for the freshness strip's
       state dots, where --rust-500 (2.7:1) and --teal-500 (2.4:1) are too dark. */
    --ink-muted-2: #4E636D;  /* secondary text on --surface-2 / tints / sand */
    --teal-200:    #7FB3A4;  /* graphical, on --petrol-900 only (3.9:1) */
    --rust-300:    #DF844E;  /* graphical, on --petrol-900 only (3.4:1) */
    --sand-400:    #C4BE9D;  /* muted label text on --petrol-900 (5.0:1) */
    --white:       #FFFFFF;  /* button labels on --rust-700 / --teal-700 */

    /* Fonts — two families plus the mono, all with font-display: swap */
    --font-display: 'Archivo', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body:    'Public Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono:    'IBM Plex Mono', ui-monospace, 'SF Mono', 'Cascadia Code', monospace;

    /* Rhythm */
    --radius:    12px;
    --radius-sm: 8px;
    --maxw:      1120px;
    --shadow:    0 14px 34px -18px rgba(39, 76, 86, 0.28);
    --shadow-sm: 0 4px 12px -6px rgba(39, 76, 86, 0.2);

    /* Focus ring — --rust-700, 2px, 2px offset */
    --focus: var(--rust-700);

    /* Mask stop only — never painted as a colour */
    --mask-opaque: #000000;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-body);
    background: var(--surface);
    color: var(--ink);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
    overflow-x: hidden;
}

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

::selection { background: var(--sand-100); color: var(--ink); }

a { color: inherit; }

/* Visible keyboard focus everywhere, never for mouse clicks */
:focus-visible {
    outline: 2px solid var(--focus);
    outline-offset: 2px;
    border-radius: 3px;
}

/* Screen-reader-only text (e.g. "opens in a new tab") */
.visually-hidden {
    position: absolute;
    width: 1px; height: 1px;
    margin: -1px; padding: 0;
    overflow: hidden;
    clip: rect(0 0 0 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link {
    position: absolute;
    left: 50%;
    top: 0;
    transform: translate(-50%, -120%);
    z-index: 4000;
    padding: 0.7rem 1.2rem;
    background: var(--rust-700);
    color: var(--white);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    text-decoration: none;
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    transition: transform 0.18s;
}
.skip-link:focus { transform: translate(-50%, 0); }

/* ---------- Ambient background ---------- */
/* A faint paper grid. Quiet by design — the freshness strip is the loud one. */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background:
        radial-gradient(60% 45% at 82% 0%, var(--teal-050), transparent 62%),
        radial-gradient(50% 40% at 4% 4%, var(--rust-050), transparent 58%);
}
.bg-grid::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(to right, var(--border) 1px, transparent 1px),
        linear-gradient(to bottom, var(--border) 1px, transparent 1px);
    background-size: 68px 68px;
    opacity: 0.35;
    mask-image: radial-gradient(circle at 50% 0%, var(--mask-opaque) 0%, transparent 68%);
    -webkit-mask-image: radial-gradient(circle at 50% 0%, var(--mask-opaque) 0%, transparent 68%);
}

/* ---------- Layout primitives ---------- */
.container {
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 1.75rem;
    position: relative;
    z-index: 1;
}

section {
    padding: 6rem 0;
    position: relative;
}
section + section { border-top: 1px solid var(--border); }

.section-head {
    max-width: 720px;
    margin-bottom: 3.25rem;
}

/* Section labels carry real information (a count, a date range, a location) —
   they are not a 01..08 sequence, because the sections are not a sequence. */
.eyebrow {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    font-weight: 500;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--ink-muted);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    margin-bottom: 0.9rem;
}
.eyebrow::before {
    content: '';
    width: 24px;
    height: 2px;
    background: var(--teal-500);
    flex-shrink: 0;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(1.85rem, 4vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    line-height: 1.1;
    color: var(--ink);
}
.section-sub {
    margin-top: 1rem;
    color: var(--ink-muted);
    font-size: 1.02rem;
    line-height: 1.7;
}

/* ---------- Icons ---------- */
.icon {
    width: 20px;
    height: 20px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.7;
    stroke-linecap: round;
    stroke-linejoin: round;
    flex-shrink: 0;
}
.icon-lg { width: 24px; height: 24px; }

/* ---------- Navigation (petrol band, sand text — 7.3:1) ---------- */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1rem 0;
    background: var(--petrol-900);
    color: var(--sand-100);
    transition: padding 0.3s, box-shadow 0.3s;
}
.navbar.scrolled { padding: 0.7rem 0; box-shadow: var(--shadow); }
.navbar .container { display: flex; align-items: center; justify-content: space-between; gap: 1rem; }
.navbar :focus-visible { outline-color: var(--sand-100); }

.logo {
    font-family: var(--font-mono);
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.01em;
    text-decoration: none;
    color: var(--sand-100);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}
.logo-dot {
    width: 8px; height: 8px; border-radius: 50%;
    background: var(--amber-500);   /* fill, not text — allowed */
    flex-shrink: 0;
}
.logo .muted { color: var(--teal-200); }

.nav-links { display: flex; align-items: center; gap: 1.75rem; list-style: none; }
.nav-links a {
    text-decoration: none;
    color: var(--sand-100);
    font-size: 0.89rem;
    font-weight: 500;
    transition: color 0.2s, border-color 0.2s;
    border-bottom: 1px solid transparent;
}
.nav-links a:hover { border-bottom-color: var(--amber-500); }
.nav-cta {
    padding: 0.45rem 1rem;
    border: 1px solid var(--teal-200) !important;
    border-radius: var(--radius-sm);
    transition: background 0.2s, border-color 0.2s;
}
.nav-cta:hover { background: var(--teal-700); border-color: var(--teal-700) !important; }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.78rem 1.35rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.94rem;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: transform 0.2s, background 0.2s, border-color 0.2s, color 0.2s;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--rust-700); color: var(--white); }       /* 5.5:1 */
.btn-primary:hover { background: var(--petrol-900); }
.btn-secondary { background: var(--teal-700); color: var(--white); }     /* 6.2:1 */
.btn-secondary:hover { background: var(--petrol-900); }
.btn-ghost { background: var(--surface); color: var(--ink); border-color: var(--border); }
.btn-ghost:hover { border-color: var(--teal-500); background: var(--teal-050); }
.btn .icon { width: 18px; height: 18px; }

/* ---------- Hero ---------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 8rem 0 4rem;
}
.hero-inner { max-width: 820px; }

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.55rem;
    padding: 0.4rem 0.9rem;
    border: 1px solid var(--teal-500);
    border-radius: 50px;
    background: var(--teal-050);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--teal-700);
    margin-bottom: 1.8rem;
}
.status-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: var(--teal-700);
    position: relative;
    flex-shrink: 0;
}
.status-dot::after {
    content: '';
    position: absolute; inset: 0;
    border-radius: 50%;
    background: var(--teal-500);
    animation: ping 2.4s ease-out infinite;
}
@keyframes ping { 0% { transform: scale(1); opacity: 0.6; } 100% { transform: scale(3); opacity: 0; } }

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.4rem, 6.6vw, 4.3rem);
    font-weight: 700;
    line-height: 1.03;
    letter-spacing: -0.035em;
    margin-bottom: 1.4rem;
    color: var(--ink);
}
.hero-title .accent { color: var(--teal-700); }
.hero-role {
    display: block;
    font-family: var(--font-mono);
    font-size: clamp(0.92rem, 2.2vw, 1.1rem);
    font-weight: 400;
    letter-spacing: 0.02em;
    color: var(--ink-muted);
    margin-top: 0.9rem;
}
.hero-desc {
    font-size: clamp(1rem, 2vw, 1.15rem);
    color: var(--ink-muted);
    max-width: 66ch;
    line-height: 1.72;
    margin-bottom: 2.2rem;
}
.hero-desc strong { color: var(--ink); font-weight: 600; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 0.75rem; }

/* ---------- Metric row ---------- */
.metrics {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    margin-top: 3.25rem;
    padding-top: 2.25rem;
    border-top: 1px solid var(--border);
}
.metric-num {
    font-family: var(--font-display);
    font-size: clamp(1.55rem, 3.5vw, 2.2rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--ink);
    line-height: 1;
}
.metric-num .unit { color: var(--teal-700); }
.metric-label {
    display: block;
    margin-top: 0.5rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--ink-muted);
}

/* ---------- Freshness strip ----------
   The signature element, and deliberately the only loud thing on the page:
   a petrol band showing real pipeline state per project. Same dark token as
   the header and footer, so the site still has exactly one dark colour.
   Renders its static fallback immediately — never a spinner, never an error.
   Contract: docs/freshness-contract.md */
.freshness {
    background: var(--petrol-900);
    color: var(--sand-100);
    padding: 1.5rem 0;
    border-top: 3px solid var(--rust-500);   /* graphical rust, the one accent */
    position: relative;
    z-index: 1;
}
section + .freshness,
.freshness + section { border-top-width: 3px; }

/* Nested variant for the case study pages, which are already inside .container */
.freshness-inline {
    border-radius: var(--radius);
    padding: 1.35rem 1.4rem;
    margin-bottom: 3rem;
}

.freshness-head { margin-bottom: 1.1rem; }
.freshness-head h2 {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 500;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--sand-100);
}
.freshness-head p {
    margin-top: 0.4rem;
    font-size: 0.8rem;
    line-height: 1.5;
    color: var(--sand-400);
    max-width: 78ch;
}
/* Reset the light-surface `code` chip styling — this one sits on petrol */
.freshness-head code {
    font-family: var(--font-mono);
    font-size: 0.94em;
    color: var(--sand-100);
    background: none;
    border: 0;
    padding: 0;
}

.freshness-rows { display: flex; flex-direction: column; gap: 0.7rem; }

.fresh-row {
    display: grid;
    grid-template-columns: minmax(180px, 230px) 1fr;
    align-items: center;
    gap: 0.85rem 1.5rem;
    padding-top: 0.7rem;
    border-top: 1px solid var(--teal-700);
}

.fresh-name {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-display);
    font-size: 0.97rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    color: var(--sand-100);
    text-decoration: none;
    border-bottom: 1px solid transparent;
}
.fresh-name:hover { border-bottom-color: var(--amber-500); }
.freshness :focus-visible { outline-color: var(--sand-100); }

/* State dot. Colour is never the only signal — every cell carries its text. */
.fresh-dot {
    width: 9px; height: 9px;
    border-radius: 50%;
    flex-shrink: 0;
    background: var(--sand-400);
}
[data-state='fresh']   .fresh-dot { background: var(--teal-200); }
[data-state='stale']   .fresh-dot,
[data-state='cold']    .fresh-dot { background: var(--amber-500); }
[data-state='failing'] .fresh-dot { background: var(--rust-300); }

.fresh-cells {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 0.8rem 1.25rem;
}
.fresh-cell { min-width: 0; }
.fresh-cell dt {
    font-family: var(--font-mono);
    font-size: 0.63rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--sand-400);
    margin-bottom: 0.22rem;
}
.fresh-cell dd {
    font-family: var(--font-mono);
    font-size: 0.94rem;
    font-weight: 500;
    color: var(--sand-100);
    line-height: 1.2;
    overflow-wrap: anywhere;
}

/* ---------- Cards (shared) ---------- */
.card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.card:hover { border-color: var(--teal-500); transform: translateY(-3px); box-shadow: var(--shadow); }

/* ---------- Experience ---------- */
.timeline { max-width: 860px; }
.exp-item {
    position: relative;
    padding-left: 2.25rem;
    padding-bottom: 3rem;
    border-left: 1px solid var(--border);
}
.exp-item:last-child { padding-bottom: 0; }
.exp-item::before {
    content: '';
    position: absolute;
    left: -5px; top: 5px;
    width: 9px; height: 9px;
    border-radius: 50%;
    background: var(--teal-500);
    box-shadow: 0 0 0 4px var(--surface);
}
.exp-head { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 0.75rem; align-items: baseline; margin-bottom: 0.4rem; }
.exp-role { font-family: var(--font-display); font-size: 1.28rem; font-weight: 700; letter-spacing: -0.02em; }
.exp-company { color: var(--teal-700); font-weight: 500; font-size: 0.98rem; margin-top: 0.15rem; }
.exp-date {
    font-family: var(--font-mono);
    font-size: 0.74rem;
    letter-spacing: 0.03em;
    color: var(--ink-muted);
    white-space: nowrap;
}

.exp-summary { color: var(--ink-muted); margin-top: 0.6rem; line-height: 1.7; }
.exp-body { display: none; padding-top: 1.4rem; }
.exp-item.open .exp-body { display: block; animation: slideDown 0.3s ease; }

.exp-more {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 1.3rem;
    padding: 0.48rem 0.9rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--ink);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.02em;
    cursor: pointer;
    transition: border-color 0.2s, color 0.2s, background 0.2s;
}
.exp-more:hover { border-color: var(--teal-500); color: var(--teal-700); background: var(--teal-050); }
.exp-chevron { width: 16px; height: 16px; transition: transform 0.3s; }
.exp-item.open .exp-more .exp-chevron { transform: rotate(180deg); }
.exp-more .more-open { display: none; }
.exp-item.open .exp-more .more-closed { display: none; }
.exp-item.open .exp-more .more-open { display: inline; }

/* de-emphasized (internship) */
.exp-item.secondary .exp-role { font-size: 1.1rem; }
.exp-item.secondary .exp-company { color: var(--ink-muted); }

.exp-points { display: flex; flex-direction: column; gap: 0.9rem; margin-bottom: 1.5rem; }
.exp-point { display: flex; gap: 0.85rem; }
.exp-point .icon { color: var(--teal-700); margin-top: 3px; }
.exp-point strong { color: var(--ink); font-weight: 600; }
.exp-point span { color: var(--ink-muted); line-height: 1.68; }

.tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.tag {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.01em;
    color: var(--ink-muted-2);
    padding: 0.3rem 0.65rem;
    border: 1px solid var(--border);
    border-radius: 5px;
    background: var(--surface-2);
}
.tag.accent { color: var(--teal-700); border-color: var(--teal-500); background: var(--teal-050); }

/* ---------- Projects ---------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}
.project {
    display: flex;
    flex-direction: column;
    padding: 1.7rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s;
}
.project:hover { border-color: var(--teal-500); transform: translateY(-4px); box-shadow: var(--shadow); }
.project.featured { border-color: var(--teal-500); }

.project-top { display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 0.6rem; margin-bottom: 1.1rem; }
.project-mark {
    width: 42px; height: 42px;
    border-radius: 10px;
    display: grid; place-items: center;
    background: var(--teal-050);
    color: var(--teal-700);
    border: 1px solid var(--teal-500);
    flex-shrink: 0;
}
.project-badge {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.28rem 0.6rem;
    border-radius: 20px;
    background: var(--surface);
    color: var(--ink-muted-2);
    border: 1px solid var(--border);
}

.project h3 { font-family: var(--font-display); font-size: 1.32rem; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 0.7rem; }
.project-desc { color: var(--ink-muted-2); line-height: 1.68; margin-bottom: 1.2rem; flex-grow: 1; }
.project-desc strong { color: var(--ink); font-weight: 600; }
.project .tags { margin-bottom: 1.25rem; }

.project-impact {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    padding: 1rem 1.1rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-bottom: 1.25rem;
}
.impact-stat { min-width: 0; }
.impact-num { font-family: var(--font-display); font-size: 1.4rem; font-weight: 700; color: var(--ink); line-height: 1.1; letter-spacing: -0.02em; }
.impact-label { display: block; margin-top: 0.3rem; font-size: 0.73rem; color: var(--ink-muted); line-height: 1.35; }

.project-links { display: flex; flex-wrap: wrap; gap: 0.55rem; margin-top: auto; }
.plink {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.84rem;
    font-weight: 600;
    text-decoration: none;
    padding: 0.52rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    color: var(--ink);
    background: var(--surface);
    cursor: pointer;
    font-family: var(--font-body);
    transition: border-color 0.2s, background 0.2s, transform 0.2s, color 0.2s;
}
.plink:hover { border-color: var(--teal-500); background: var(--teal-050); color: var(--teal-700); transform: translateY(-1px); }
.plink.solid { background: var(--rust-700); color: var(--white); border-color: var(--rust-700); }
.plink.solid:hover { background: var(--petrol-900); border-color: var(--petrol-900); color: var(--white); }
.plink .icon { width: 16px; height: 16px; }

/* ---------- Case study pages (own URL, own <title>) ---------- */
@keyframes slideDown { from { opacity: 0; transform: translateY(-12px); } to { opacity: 1; transform: none; } }

.case-page { padding: 8.5rem 0 5rem; }
.case-page .container { max-width: 900px; }

.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 2rem;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
}
.breadcrumb a { color: var(--rust-700); text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb [aria-current='page'] { color: var(--ink); }

.case-hero { padding-bottom: 2.25rem; border-bottom: 1px solid var(--border); margin-bottom: 3rem; }
.case-hero h1 {
    font-family: var(--font-display);
    font-size: clamp(1.95rem, 5vw, 2.9rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.08;
    margin-bottom: 1rem;
    color: var(--ink);
}
.case-lede { color: var(--ink-muted); font-size: clamp(1.02rem, 2vw, 1.18rem); line-height: 1.65; max-width: 66ch; }
.case-hero .tags { margin: 1.4rem 0; }

.case-block { margin-bottom: 2.5rem; }
.case-block:last-child { margin-bottom: 0; }
.case-block .block-label {
    font-family: var(--font-mono);
    font-size: 0.76rem;
    font-weight: 500;
    letter-spacing: 0.13em;
    text-transform: uppercase;
    color: var(--ink-muted);
    display: flex; align-items: center; gap: 0.6rem;
    margin-bottom: 1.1rem;
}
.case-block .block-label::before {
    content: '';
    width: 24px; height: 2px;
    background: var(--teal-500);
    flex-shrink: 0;
}
.case-block p { color: var(--ink-muted); line-height: 1.78; margin-bottom: 1rem; max-width: 72ch; }
.case-block p:last-child { margin-bottom: 0; }
.case-block strong { color: var(--ink); font-weight: 600; }
.case-block a { color: var(--rust-700); text-decoration: underline; text-underline-offset: 2px; }
.case-block code, .exp-point code, p code {
    font-family: var(--font-mono);
    font-size: 0.86em;
    padding: 0.1em 0.36em;
    border-radius: 4px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--ink);
}

.decision-list { list-style: none; display: flex; flex-direction: column; gap: 1.05rem; }
.decision-list li { padding-left: 1.5rem; position: relative; color: var(--ink-muted); line-height: 1.72; max-width: 72ch; }
.decision-list li::before {
    content: '';
    position: absolute; left: 0; top: 10px;
    width: 7px; height: 7px; border-radius: 2px;
    background: var(--teal-500);
}
.decision-list li strong { display: block; color: var(--ink); margin-bottom: 0.15rem; }

/* Fixed 3-up so a 4- or 6-stat block never leaves an orphan on its own row */
.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.9rem;
    margin-bottom: 1.4rem;
}
.result {
    padding: 1.3rem 1rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    text-align: center;
}
.result-num { font-family: var(--font-display); font-size: 1.7rem; font-weight: 700; color: var(--ink); line-height: 1.1; letter-spacing: -0.025em; }
.result-label { display: block; margin-top: 0.45rem; font-size: 0.78rem; color: var(--ink-muted); line-height: 1.4; }

.callout {
    padding: 1.2rem 1.35rem;
    background: var(--teal-050);
    border: 1px solid var(--teal-500);
    border-left: 3px solid var(--teal-700);
    border-radius: var(--radius-sm);
    color: var(--ink-muted-2);
    line-height: 1.72;
}
.callout strong { color: var(--ink); }

/* Dated "current state" disclosure — keeps claims from going stale silently */
.honest-note {
    padding: 1rem 1.2rem;
    background: var(--rust-050);
    border-left: 3px solid var(--rust-700);
    border-radius: var(--radius-sm);
    color: var(--ink-muted-2) !important;
    font-size: 0.95rem;
    max-width: 72ch;
}
.honest-note strong { color: var(--ink); }

.case-foot {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 3.5rem;
    padding-top: 2.5rem;
    border-top: 1px solid var(--border);
}

/* code snippet — light, so --petrol-900 stays the header/footer band alone */
.code {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    margin-top: 1rem;
    overflow: hidden;
}
.code-head {
    display: flex; align-items: center; gap: 0.55rem;
    padding: 0.55rem 1rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
    font-family: var(--font-mono);
    font-size: 0.71rem;
    color: var(--ink-muted);
}
.code-head .dot { width: 8px; height: 8px; border-radius: 50%; background: var(--border); flex-shrink: 0; }
.code pre { padding: 1.05rem; overflow-x: auto; }
.code code { font-family: var(--font-mono); font-size: 0.8rem; line-height: 1.7; color: var(--ink); white-space: pre; background: none; border: 0; padding: 0; }
.code .k { color: var(--rust-700); font-weight: 500; }   /* keyword */
.code .c { color: var(--ink-muted-2); font-style: italic; } /* comment */
.code .f { color: var(--teal-700); }                     /* function / literal */

/* ---------- Architecture diagram (HTML/CSS flow) ---------- */
.arch {
    margin-top: 1.2rem;
    padding: 1.5rem;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow-x: auto;
}
.arch-flow {
    display: flex;
    align-items: stretch;
    gap: 0.4rem;
    min-width: 720px;
}
.arch-stage { flex: 1; display: flex; flex-direction: column; }
.arch-stage-label {
    font-family: var(--font-mono);
    font-size: 0.66rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--ink-muted);
    text-align: center;
    margin-bottom: 0.8rem;
}
.arch-nodes { display: flex; flex-direction: column; gap: 0.5rem; justify-content: center; flex-grow: 1; }
.arch-node {
    text-align: center;
    padding: 0.65rem 0.55rem;
    border-radius: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    font-size: 0.8rem;
    color: var(--ink);
    line-height: 1.35;
}
.arch-node small { display: block; font-family: var(--font-mono); font-size: 0.64rem; color: var(--ink-muted); margin-top: 0.2rem; }
.arch-node.key { border-color: var(--teal-500); background: var(--teal-050); color: var(--teal-700); }
.arch-node.key small { color: var(--teal-700); }
.arch-node.ai { border-color: var(--rust-500); background: var(--rust-050); color: var(--rust-700); }
.arch-node.ai small { color: var(--rust-700); }
.arch-arrow {
    align-self: center;
    color: var(--teal-500);
    display: flex;
    align-items: center;
    padding-top: 1.5rem;
}
.arch-arrow .icon { width: 18px; height: 18px; }
.arch-note {
    margin-top: 0.9rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--ink-muted);
    text-align: center;
    max-width: none !important;
}

/* ---------- About ---------- */
.about-wrap { display: grid; grid-template-columns: 260px 1fr; gap: 3.25rem; align-items: start; }
.about-photo {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: 16px;
    overflow: hidden;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}
.about-photo img { width: 100%; height: 100%; object-fit: cover; }
.about-body p { color: var(--ink-muted); font-size: 1.05rem; line-height: 1.8; margin-bottom: 1.2rem; }
.about-body strong { color: var(--ink); font-weight: 600; }
.about-facts {
    display: flex; flex-wrap: wrap; gap: 0.55rem;
    margin-top: 1.5rem;
}
.about-fact {
    display: inline-flex; align-items: center; gap: 0.5rem;
    padding: 0.48rem 0.85rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface-2);
    font-size: 0.84rem;
    color: var(--ink-muted-2);
}
.about-fact .icon { width: 16px; height: 16px; color: var(--teal-700); }

/* ---------- Tech stack ---------- */
.stack-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.2rem;
}
.stack-card { padding: 1.5rem; }
.stack-card .card-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--ink-muted);
    display: flex; align-items: center; gap: 0.55rem;
    margin-bottom: 1.15rem;
    padding-bottom: 0.85rem;
    border-bottom: 1px solid var(--border);
}
.stack-card .card-label .icon { color: var(--teal-700); }
.stack-list { display: flex; flex-direction: column; gap: 0.65rem; }
.stack-row { display: flex; align-items: center; gap: 0.7rem; }
.stack-row img { width: 22px; height: 22px; }
.stack-row .dot-mark { width: 8px; height: 8px; border-radius: 50%; background: var(--teal-500); flex-shrink: 0; margin: 0 7px; }
.stack-row span { font-size: 0.93rem; color: var(--ink); }
.stack-row .lvl { margin-left: auto; font-family: var(--font-mono); font-size: 0.66rem; color: var(--ink-muted); letter-spacing: 0.03em; }

/* ---------- Process ---------- */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.2rem;
}
.process-card { padding: 1.45rem; }
.process-card .icon { color: var(--teal-700); margin-bottom: 0.85rem; }
.process-card h3 { font-family: var(--font-display); font-size: 1.08rem; font-weight: 700; margin-bottom: 0.4rem; letter-spacing: -0.015em; }
.process-card p { color: var(--ink-muted-2); font-size: 0.89rem; line-height: 1.6; }

/* ---------- Education ---------- */
.edu-item {
    display: grid;
    grid-template-columns: 150px 1fr;
    gap: 2.5rem;
    padding-bottom: 2.5rem;
}
.edu-item:last-child { padding-bottom: 0; }
.edu-date { font-family: var(--font-mono); font-size: 0.76rem; color: var(--ink-muted); padding-top: 0.35rem; }
.edu-body h3 { font-family: var(--font-display); font-size: 1.18rem; font-weight: 700; margin-bottom: 0.35rem; letter-spacing: -0.02em; }
.edu-school { color: var(--teal-700); font-size: 0.93rem; margin-bottom: 0.75rem; }
.edu-body p { color: var(--ink-muted); line-height: 1.7; }
.edu-achievement {
    margin-top: 1rem;
    padding: 0.95rem 1.15rem;
    background: var(--teal-050);
    border-left: 3px solid var(--teal-700);
    border-radius: var(--radius-sm);
}
.edu-achievement p { color: var(--ink-muted-2); margin-bottom: 0.3rem; }
.edu-achievement p:last-child { margin-bottom: 0; }
.edu-achievement strong { color: var(--ink); }

/* ---------- Certifications ---------- */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.2rem;
}
.cert-card { padding: 1.5rem; }
.cert-head { display: flex; align-items: center; justify-content: space-between; gap: 0.75rem; margin-bottom: 1rem; }
.cert-mark { width: 38px; height: 38px; border-radius: 9px; display: grid; place-items: center; background: var(--teal-050); color: var(--teal-700); border: 1px solid var(--teal-500); flex-shrink: 0; }
.cert-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--ink-muted); }
.cert-status {
    font-family: var(--font-mono);
    font-size: 0.64rem;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    padding: 0.24rem 0.58rem;
    border-radius: 20px;
    background: var(--rust-050);
    color: var(--rust-700);
    border: 1px solid var(--rust-500);
    white-space: nowrap;
}
.cert-card h3 { font-family: var(--font-display); font-size: 1.03rem; font-weight: 700; line-height: 1.35; margin-bottom: 0.4rem; letter-spacing: -0.015em; }
.cert-issuer { color: var(--teal-700); font-size: 0.88rem; margin-bottom: 0.85rem; }
.cert-card .tags { margin-top: 0.85rem; }

/* ---------- Contact ---------- */
.contact { text-align: center; }
.contact .container { max-width: 720px; }
.contact h2 { font-family: var(--font-display); font-size: clamp(1.9rem, 5vw, 3rem); font-weight: 700; letter-spacing: -0.03em; margin-bottom: 1.1rem; color: var(--ink); }
.contact p { color: var(--ink-muted); font-size: 1.05rem; line-height: 1.75; margin-bottom: 2rem; }
.contact-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; justify-content: center; }

/* ---------- Footer (petrol band, sand text — 7.3:1) ---------- */
.footer {
    padding: 2.25rem 0;
    background: var(--petrol-900);
    color: var(--sand-100);
    position: relative;
    z-index: 1;
}
.footer .container { display: flex; flex-wrap: wrap; justify-content: space-between; align-items: center; gap: 1rem; }
.footer p { color: var(--sand-100); font-size: 0.83rem; font-family: var(--font-mono); }
.footer-links { display: flex; flex-wrap: wrap; gap: 1.35rem; }
.footer-links a { color: var(--sand-100); text-decoration: none; font-size: 0.83rem; border-bottom: 1px solid transparent; transition: border-color 0.2s; }
.footer-links a:hover { border-bottom-color: var(--amber-500); }
.footer :focus-visible { outline-color: var(--sand-100); }

/* ---------- No-JS fallbacks ---------- */
/* The experience accordion collapses via JS. Without JS every panel is open
   and the toggle is hidden, so no content is unreachable. */
.no-js .exp-body { display: block; }
.no-js .exp-more { display: none; }
.no-js [data-reveal] { opacity: 1; transform: none; }

/* ---------- Reveal on scroll ---------- */
[data-reveal] {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
[data-reveal].is-visible { opacity: 1; transform: none; }

/* ---------- Scrollbar ---------- */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--surface-2); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 5px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink-muted); }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
    .about-wrap { grid-template-columns: 1fr; gap: 2rem; }
    .about-photo { max-width: 220px; }
}
@media (max-width: 768px) {
    section { padding: 4.25rem 0; }
    .case-page { padding: 7rem 0 3.5rem; }
    .nav-links { gap: 1rem; }
    .nav-links a:not(.nav-cta) { display: none; }
    .metrics { grid-template-columns: repeat(2, 1fr); gap: 1.65rem 1.25rem; }
    .hero-buttons { width: 100%; }
    .hero-buttons .btn { flex: 1 1 auto; justify-content: center; min-width: 150px; }
    .edu-item { grid-template-columns: 1fr; gap: 0.5rem; }
    .results-grid { grid-template-columns: repeat(2, 1fr); }
    .arch-flow { flex-direction: column; min-width: 0; }
    .arch-stage-label { text-align: left; }
    .arch-arrow { padding-top: 0; align-self: center; transform: rotate(90deg); }
    .case-foot .btn { flex: 1 1 auto; justify-content: center; }
    .fresh-row { grid-template-columns: 1fr; gap: 0.7rem; }
    .fresh-cells { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 480px) {
    .container { padding: 0 1.15rem; }
    .metrics { grid-template-columns: 1fr 1fr; }
    .results-grid { grid-template-columns: repeat(2, 1fr); }
    .footer .container { flex-direction: column; text-align: center; }
    .footer-links { justify-content: center; }
    .project-impact { gap: 1rem; }
}
/* 360px floor: nothing may overflow horizontally at the narrowest phones */
@media (max-width: 380px) {
    .container { padding: 0 0.95rem; }
    section { padding: 3.5rem 0; }
    .hero { padding: 6.5rem 0 3rem; }
    .metrics { grid-template-columns: 1fr; gap: 1.2rem; }
    .results-grid { grid-template-columns: 1fr; }
    .project-badge { font-size: 0.6rem; }
    .project { padding: 1.25rem; }
    .stack-card, .cert-card, .process-card { padding: 1.2rem; }
    .project-impact { flex-direction: column; gap: 0.85rem; }
    .hero-buttons .btn, .contact-actions .btn, .case-foot .btn { width: 100%; }
    .plink { flex: 1 1 100%; justify-content: center; }
    .status-badge { font-size: 0.64rem; letter-spacing: 0.03em; }
    .exp-item { padding-left: 1.4rem; }
    .code pre { padding: 0.8rem; }
    .code code { font-size: 0.72rem; }
    .arch { padding: 1rem; }
    .breadcrumb { font-size: 0.7rem; }
    .freshness-inline { padding: 1.1rem; }
    .fresh-cell dd { font-size: 0.85rem; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
    html { scroll-behavior: auto; }
    [data-reveal] { opacity: 1; transform: none; }
    .btn:hover, .card:hover, .project:hover, .plink:hover { transform: none; }
}