/* ==================================================================
   PI · design system for jonathanwoodley.com
   Tokens are fixed by ~/designs/pi.json: warm stone paper, charcoal
   and dark-slate ink, a Plantin-class book serif, 0px radius on
   everything including buttons, and one weight (400) throughout —
   hierarchy comes from size and rule, not boldness. Swiss-influenced
   editorial, not a startup dashboard: keep it quiet.

   Two deliberate deviations from the literal token file, noted here
   so a future edit doesn't "fix" them back to the raw numbers:
   - h2 was given as 49.5px, larger than h1's 47.7px. Read as
     extraction noise (an h2 outscaling h1 breaks hierarchy on a
     page with many h2 section labels), so h2 is set well below h1.
   - body was given as one figure, 25.2px. Applied literally to the
     page's handful of "pull quote" intro paragraphs (masthead lede,
     the apps note, each project's standfirst) where a big opening
     serif line is a real editorial device; dense UI text (the work
     ledger, nav, footer) stays smaller so 20 rows of it stay usable.
   ================================================================== */

:root {
    --paper:  #EBE7E4;
    --panel:  #F4F2F0;
    --dark:   #2D3644;
    --ink:    #515965;
    --text:   #555D69;
    --edge:   #C9C4C0;

    /* Derived: the same grays, softened toward the paper. */
    --text-soft: #6B7078;
    --text-mute: #86898F;
    --edge-soft: #DBD7D3;

    --serif: "Source Serif 4", Georgia, "Times New Roman", serif;

    --u: 4px;                /* pi base unit */
    --shell: 1080px;
    --measure: 38rem;        /* ~68 characters at 17px */
    --measure-lg: 34rem;     /* ~68 characters at 25.2px */
}

@font-face { font-family: "Source Serif 4"; src: url("../fonts/SourceSerif4-Regular.woff2") format("woff2"); font-weight: 400; font-style: normal; font-display: swap; }
@font-face { font-family: "Source Serif 4"; src: url("../fonts/SourceSerif4-Italic.woff2")  format("woff2"); font-weight: 400; font-style: italic; font-display: swap; }
@font-face { font-family: "Source Serif 4"; src: url("../fonts/SourceSerif4-Bold.woff2")    format("woff2"); font-weight: 700; font-style: normal; font-display: swap; }

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

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: .01ms !important; transition-duration: .01ms !important; }
}

body {
    background: var(--paper);
    color: var(--text);
    font-family: var(--serif);
    font-size: 17px;
    line-height: 1.6;
    font-feature-settings: "kern", "liga";
    -webkit-font-smoothing: antialiased;
}

::selection { background: var(--dark); color: var(--paper); }

:focus-visible { outline: 2px solid var(--dark); outline-offset: 3px; }
.on-dark :focus-visible { outline-color: var(--paper); }

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

.wrap    { max-width: var(--shell);  margin: 0 auto; padding: 0 calc(var(--u) * 6); }
.measure { max-width: var(--measure); }

.skip {
    position: absolute; left: -9999px;
    background: var(--dark); color: var(--paper);
    padding: var(--u) calc(var(--u) * 4);
}
.skip:focus { left: var(--u); top: var(--u); z-index: 10; }

/* ---------- Type ---------- */

h1, h2, h3, h4 { font-family: var(--serif); font-weight: 400; line-height: 1.2; color: var(--ink); }

h1 { font-size: clamp(2rem, 6vw, 47.7px); letter-spacing: -0.01em; }
h2 { font-size: clamp(1.4rem, 3vw, 28px); }
h3 { font-size: 20px; }

p { text-wrap: pretty; }
p + p { margin-top: calc(var(--u) * 4); }
em { font-style: italic; }

a { color: inherit; text-decoration-color: var(--edge); text-underline-offset: 3px; }
a:hover { text-decoration-color: currentColor; }

/* ---------- Buttons — square corners, bordered, no fill animation ---------- */

.btn {
    display: inline-block;
    border-radius: 0;
    padding: calc(var(--u) * 3) calc(var(--u) * 6);
    font-family: var(--serif);
    font-size: 15px;
    font-weight: 400;
    text-decoration: none;
    border: 1px solid var(--edge);
    transition: border-color .15s ease, background-color .15s ease;
}
.btn--primary   { background: #E5E1DF; color: var(--text); }
.btn--primary:hover { border-color: var(--ink); }
.btn--secondary { background: var(--panel); color: var(--text); }
.btn--secondary:hover { border-color: var(--ink); }

/* On the dark panel the palette inverts: paper-toned button on charcoal. */
.on-dark .btn--primary { background: var(--paper); color: var(--dark); border-color: var(--paper); }
.on-dark .btn--primary:hover { background: #fff; }
.on-dark .btn--secondary { background: transparent; color: var(--paper); border-color: rgba(235, 231, 228, .4); }
.on-dark .btn--secondary:hover { border-color: var(--paper); }

/* ---------- Masthead ---------- */

.masthead { padding-block: calc(var(--u) * 18) calc(var(--u) * 14); }

.masthead-id {
    display: flex;
    align-items: center;
    gap: calc(var(--u) * 4);
    margin-bottom: calc(var(--u) * 8);
}
.masthead-id img {
    width: 52px; height: 52px;
    object-fit: cover;
    filter: grayscale(.4) contrast(.95);
}
.masthead-id .name { font-size: 14px; letter-spacing: .01em; }
.masthead-id .where { font-size: 14px; color: var(--text-mute); }

.masthead h1 { max-width: 19ch; margin-bottom: calc(var(--u) * 6); }

.masthead .lede {
    max-width: var(--measure-lg);
    font-size: 25.2px;
    line-height: 1.45;
    color: var(--ink);
}

.masthead-links {
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--u) * 3);
    margin-top: calc(var(--u) * 8);
}

/* ---------- Live apps — the one loud element ---------- */

.apps {
    background: var(--dark);
    color: var(--paper);
    padding: calc(var(--u) * 16) 0;
}
.apps h2 { color: var(--paper); margin-bottom: calc(var(--u) * 3); }
.apps .apps-note { font-size: 25.2px; line-height: 1.45; color: rgba(235, 231, 228, .82); max-width: var(--measure-lg); }

.app {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: calc(var(--u) * 10);
    align-items: center;
    margin-top: calc(var(--u) * 12);
    padding-top: calc(var(--u) * 12);
    border-top: 1px solid rgba(235, 231, 228, .2);
}
.app-shot { border: 1px solid rgba(235, 231, 228, .2); }
.app h3 { color: var(--paper); margin-bottom: calc(var(--u) * 4); }
.app p { color: rgba(235, 231, 228, .8); }
.app .app-actions { display: flex; flex-wrap: wrap; gap: calc(var(--u) * 3); margin-top: calc(var(--u) * 6); }

/* ---------- Work ledger ---------- */

.work { padding-block: calc(var(--u) * 18) 0; }
.work h2 { margin-bottom: calc(var(--u) * 2); }
.work-intro { font-size: 25.2px; line-height: 1.45; color: var(--ink); max-width: var(--measure-lg); margin-bottom: calc(var(--u) * 10); }

.group { margin-bottom: calc(var(--u) * 14); }
.group > h3 {
    font-size: 14px;
    font-family: var(--serif);
    font-weight: 700;
    letter-spacing: .01em;
    color: var(--ink);
    padding-bottom: calc(var(--u) * 2);
    border-bottom: 1px solid var(--ink);
    margin-bottom: 0;
}

.row {
    display: grid;
    grid-template-columns: 4.5rem 1fr;
    gap: calc(var(--u) * 6);
    padding: calc(var(--u) * 6) 0;
    border-bottom: 1px solid var(--edge-soft);
    text-decoration: none;
    color: inherit;
}
.row-year {
    font-size: 14px;
    color: var(--text-mute);
    font-variant-numeric: tabular-nums;
    padding-top: 3px;
}
.row-head { display: flex; align-items: baseline; flex-wrap: wrap; gap: calc(var(--u) * 3); }
.row-title { font-size: 20px; color: var(--ink); }
.row-note { display: block; color: var(--text); margin-top: calc(var(--u) * 2); max-width: var(--measure); }
.row-tech { display: block; margin-top: calc(var(--u) * 3); font-size: 12.5px; letter-spacing: .01em; color: var(--text-mute); }
.row-tech span { display: inline-block; margin-right: calc(var(--u) * 4); }

a.row { transition: background-color .15s ease; }
a.row:hover, a.row:focus-visible { background: var(--panel); }
a.row:hover .row-title { text-decoration: underline; text-underline-offset: 4px; }

/* Status flags. Filled = you can use it now; outlined = still building. */
.flag {
    font-size: 11px;
    letter-spacing: .03em;
    padding: 2px calc(var(--u) * 2);
    white-space: nowrap;
}
.flag--live   { background: var(--dark); color: var(--paper); }
.flag--active { border: 1px solid var(--edge); color: var(--text-mute); }

/* ---------- Skills ---------- */

.skills { padding-block: calc(var(--u) * 8) calc(var(--u) * 18); }
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
    gap: calc(var(--u) * 10);
    margin-top: calc(var(--u) * 8);
}
.skills-grid h3 {
    font-size: 14px;
    padding-bottom: calc(var(--u) * 2);
    border-bottom: 1px solid var(--edge);
    margin-bottom: calc(var(--u) * 4);
}
.skills-grid ul { list-style: none; }
.skills-grid li { color: var(--text); font-size: 15px; padding: calc(var(--u) * 1.5) 0; }

/* ---------- Certifications ---------- */

.certs { padding-block: 0 calc(var(--u) * 18); }
.cert-track {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(7rem, 1fr));
    gap: calc(var(--u) * 6);
    margin-top: calc(var(--u) * 8);
}
.cert {
    background: none; border: 0; padding: 0; cursor: pointer;
    font: inherit; color: inherit; text-align: left;
}
.cert img {
    width: 100%;
    filter: grayscale(1) contrast(.9) opacity(.65);
    transition: filter .2s ease;
}
.cert:hover img, .cert:focus-visible img { filter: none; }

.cert-dialog {
    border: 1px solid var(--edge);
    background: var(--paper);
    color: var(--text);
    padding: 0;
    max-width: 44rem;
    width: calc(100% - var(--u) * 8);
}
.cert-dialog::backdrop { background: rgba(45, 54, 68, .55); }
.cert-dialog-inner { display: grid; grid-template-columns: 12rem 1fr; gap: calc(var(--u) * 8); padding: calc(var(--u) * 8); }
.cert-dialog img { align-self: start; }
.cert-dialog h3 { margin-bottom: calc(var(--u) * 2); }
.cert-dialog .org { color: var(--text-mute); font-size: 14px; margin-bottom: calc(var(--u) * 4); }
.cert-dialog .why { color: var(--text); margin-bottom: calc(var(--u) * 6); }

/* ---------- Project pages ---------- */

.proj-head { padding-block: calc(var(--u) * 12) calc(var(--u) * 10); }
.back { font-size: 14px; color: var(--text-mute); text-decoration: none; display: inline-block; margin-bottom: calc(var(--u) * 8); }
.back:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }

.proj-head h1 { max-width: 16ch; margin-bottom: calc(var(--u) * 4); }
.proj-flags { display: flex; align-items: center; flex-wrap: wrap; gap: calc(var(--u) * 3); margin-bottom: calc(var(--u) * 6); }
.proj-year { font-size: 14px; color: var(--text-mute); font-variant-numeric: tabular-nums; }
.proj-head .standfirst { font-size: 25.2px; color: var(--ink); max-width: var(--measure-lg); line-height: 1.45; }
.proj-actions { display: flex; flex-wrap: wrap; gap: calc(var(--u) * 3); margin-top: calc(var(--u) * 8); }

.proj-body { padding-bottom: calc(var(--u) * 16); }
.proj-body h2 { font-size: 22px; margin: calc(var(--u) * 12) 0 calc(var(--u) * 4); }
.proj-body h2, .proj-body p, .proj-body ul { max-width: var(--measure); }
.proj-body p { color: var(--text); }
.proj-body code {
    font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    font-size: .82em;
    background: var(--panel);
    padding: 1px 5px;
}
.proj-body ul { list-style: none; margin-top: calc(var(--u) * 4); }
.proj-body li {
    color: var(--text);
    padding: calc(var(--u) * 3) 0 calc(var(--u) * 3) calc(var(--u) * 6);
    border-bottom: 1px solid var(--edge-soft);
    position: relative;
}
.proj-body li::before {
    content: ""; position: absolute; left: 0; top: calc(var(--u) * 4 + 6px);
    width: 10px; height: 1px; background: var(--ink);
}
.proj-body li b { color: var(--ink); font-weight: 700; }

.figure { max-width: 100%; margin: calc(var(--u) * 10) 0; }
.figure img { border: 1px solid var(--edge); }
.figure figcaption { font-size: 13px; color: var(--text-mute); margin-top: calc(var(--u) * 3); max-width: var(--measure); }
.figure-pair { display: grid; grid-template-columns: 1fr 1fr; gap: calc(var(--u) * 6); margin: calc(var(--u) * 10) 0; }
.figure-pair .figure { margin: 0; }

/* Published Power BI reports are sized by the host, so hold a 16:10 box. */
.embed {
    position: relative;
    padding-top: 62.5%;
    margin: calc(var(--u) * 8) 0;
    border: 1px solid var(--edge);
    background: var(--panel);
}
.embed iframe { position: absolute; inset: 0; width: 100%; height: 100%; border: 0; }

.spec {
    border-top: 1px solid var(--ink);
    max-width: var(--measure);
    margin-top: calc(var(--u) * 12);
    padding-top: calc(var(--u) * 6);
}
.spec dl { display: grid; grid-template-columns: 9rem 1fr; gap: calc(var(--u) * 3) calc(var(--u) * 6); font-size: 14px; }
.spec dt { color: var(--text-mute); }
.spec dd { color: var(--ink); }

/* ---------- Footer ---------- */

.foot {
    border-top: 1px solid var(--edge);
    padding-block: calc(var(--u) * 10) calc(var(--u) * 14);
    display: flex;
    flex-wrap: wrap;
    gap: calc(var(--u) * 6);
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
    color: var(--text-mute);
}
.foot-links { display: flex; flex-wrap: wrap; gap: calc(var(--u) * 6); }
.foot-links a { display: inline-flex; align-items: center; gap: calc(var(--u) * 2); text-decoration: none; color: var(--text); }
.foot-links a:hover { color: var(--ink); text-decoration: underline; text-underline-offset: 3px; }
.foot-links svg { width: 15px; height: 15px; fill: currentColor; }

/* ---------- Narrow screens ---------- */

@media (max-width: 44rem) {
    body { font-size: 16px; }
    .masthead { padding-block: calc(var(--u) * 12) calc(var(--u) * 10); }
    .masthead .lede, .apps .apps-note, .work-intro, .proj-head .standfirst { font-size: 20px; }
    .app { grid-template-columns: 1fr; gap: calc(var(--u) * 6); }
    .row { grid-template-columns: 1fr; gap: calc(var(--u) * 2); }
    .row-year { padding-top: 0; }
    .figure-pair { grid-template-columns: 1fr; }
    .cert-dialog-inner { grid-template-columns: 1fr; }
    .spec dl { grid-template-columns: 1fr; gap: 0; }
    .spec dt { margin-top: calc(var(--u) * 4); }
}