/* ==========================================================================
   Sophia Pi — site styles
   One stylesheet for every page. Design tokens first, then layout, then
   components. Anything page-specific lives at the bottom under its own
   heading rather than in a <style> block on the page itself.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Tokens
   -------------------------------------------------------------------------- */

:root {
    /* Yellow ground (the blog page's old #f6eb81) with white content surfaces.
       Text and rules are warmed to sit on the yellow rather than fight it;
       blue stays the only accent, and reads well against it. */
    --paper:        #f6eb81;
    --paper-sunk:   #f0e36a;
    --surface:      #ffffff;
    --ink:          #17160f;
    --body:         #3a382c;
    --muted:        #635f49;
    --rule:         #ddcf6b;
    --rule-strong:  #c7b74e;

    --accent:       #100dc9;
    --accent-deep:  #0b0994;
    --accent-wash:  rgba(255, 255, 255, 0.55);

    --sans:    "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --mono:    "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
    --display: var(--mono);

    /* Type scale — denser than a reading site; this is closer to a notebook. */
    --step--2: 0.6875rem;
    --step--1: 0.8125rem;
    --step-0:  1rem;
    --step-1:  1.125rem;
    --step-2:  1.375rem;
    --step-3:  clamp(1.5rem, 1.25rem + 1.2vw, 2rem);
    --step-4:  clamp(1.875rem, 1.4rem + 2.2vw, 2.75rem);

    /* Rhythm */
    --gutter:     clamp(1.25rem, 5vw, 2.5rem);
    --measure:    72ch;
    --shell:      68rem;
    --shell-slim: 52rem;

    --radius:     2px;
    --header-h:   3.75rem;
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */

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

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    background-color: var(--paper);
    color: var(--body);
    font-family: var(--sans);
    font-size: var(--step-0);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

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

/* Headings run in the mono face — the whole site reads as one technical
   system rather than a document set in a book face. */
h1, h2, h3, h4 {
    font-family: var(--display);
    color: var(--ink);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin: 0;
    text-wrap: balance;
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a {
    color: var(--accent);
    text-decoration: none;
}

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

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    border-radius: 2px;
}

hr {
    border: 0;
    border-top: 1px solid var(--rule);
    margin: 2.5rem 0;
}

/* Links in running text: underline thickens on hover instead of the default
   that collides with descenders. */
.prose a,
.link {
    background-image: linear-gradient(var(--accent), var(--accent));
    background-repeat: no-repeat;
    background-position: 0 100%;
    background-size: 100% 1px;
    padding-bottom: 1px;
    transition: background-size 0.15s ease, color 0.15s ease;
}

.prose a:hover,
.link:hover {
    background-size: 100% 2px;
    color: var(--accent-deep);
}

/* --------------------------------------------------------------------------
   3. Layout primitives
   -------------------------------------------------------------------------- */

.shell {
    width: 100%;
    max-width: var(--shell);
    margin-inline: auto;
    padding-inline: var(--gutter);
}

.shell--slim { max-width: var(--shell-slim); }

.page {
    padding-block: clamp(2rem, 5vw, 3.5rem) clamp(2.5rem, 6vw, 4.5rem);
}

.section {
    padding-block: clamp(2rem, 5vw, 3.25rem);
    scroll-margin-top: calc(var(--header-h) + 1rem);
}

.section + .section { border-top: 1px solid var(--rule); }

.stack > * + * { margin-top: 1em; }

/* Small mono label above a heading. */
.eyebrow {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin: 0 0 0.6rem;
}

/* Section title with a hairline rule running out to the right edge. */
.rule-heading {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.75rem;
}

.rule-heading h2 {
    font-size: var(--step-1);
    font-weight: 500;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

.rule-heading::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule);
}

/* --------------------------------------------------------------------------
   4. Header & footer (injected by assets/js/site.js)
   -------------------------------------------------------------------------- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    background: rgba(246, 235, 129, 0.88);
    backdrop-filter: saturate(180%) blur(10px);
    -webkit-backdrop-filter: saturate(180%) blur(10px);
    border-bottom: 1px solid var(--rule);
}

.site-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1.5rem;
    min-height: var(--header-h);
}

.wordmark {
    font-family: var(--mono);
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--ink);
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.wordmark span { color: var(--accent); }

.site-nav {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.site-nav a {
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--muted);
    padding-block: 0.3rem;
    border-bottom: 1px solid transparent;
    transition: color 0.15s ease, border-color 0.15s ease;
}

.site-nav a:hover { color: var(--ink); }

.site-nav a[aria-current="page"] {
    color: var(--ink);
    border-bottom-color: var(--accent);
}

.nav-toggle {
    display: none;
    background: none;
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius);
    color: var(--ink);
    padding: 0.35rem 0.5rem;
    cursor: pointer;
    line-height: 0;
}

@media (max-width: 820px) {
    .nav-toggle { display: block; }

    .site-nav {
        display: none;
        position: absolute;
        left: 0;
        right: 0;
        top: 100%;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: var(--paper);
        border-bottom: 1px solid var(--rule);
        padding: 0.25rem var(--gutter) 0.75rem;
    }

    .site-nav[data-open="true"] { display: flex; }

    .site-nav a {
        padding-block: 0.55rem;
        border-bottom: 1px solid var(--rule);
    }

    .site-nav a[aria-current="page"] { color: var(--accent); }
}

.site-footer {
    border-top: 1px solid var(--rule);
    background: var(--paper-sunk);
    margin-top: clamp(2.5rem, 6vw, 4rem);
    padding-block: 2rem;
}

.site-footer__inner {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 1.25rem;
}

.site-footer__links {
    display: flex;
    gap: 1.125rem;
    align-items: center;
}

.site-footer__links a {
    color: var(--muted);
    display: inline-flex;
    transition: color 0.15s ease;
}

.site-footer__links a:hover { color: var(--accent); }

.site-footer__note {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.06em;
    color: var(--muted);
}

/* --------------------------------------------------------------------------
   5. Prose
   -------------------------------------------------------------------------- */

.prose {
    max-width: var(--measure);
    color: var(--body);
}

.prose h2 {
    font-size: var(--step-1);
    font-weight: 500;
    letter-spacing: 0.02em;
    margin: 2.25rem 0 0.85rem;
}

.prose h3 {
    font-size: var(--step-0);
    margin: 1.75rem 0 0.6rem;
}

.prose > p { line-height: 1.65; }

.prose strong { color: var(--ink); font-weight: 600; }

/* Standfirst — the informal opener on every project page. Slightly larger and
   darker than body copy, but the same face; no editorial serif. */
.standfirst {
    font-size: var(--step-1);
    line-height: 1.6;
    color: var(--body);
}

.standfirst p + p { margin-top: 0.85em; }

/* Callout for notes, errata, availability caveats. */
.callout {
    border-left: 2px solid var(--accent);
    background: var(--accent-wash);
    padding: 0.85rem 1.1rem;
    font-size: var(--step--1);
    line-height: 1.6;
    color: var(--body);
}

.callout strong { color: var(--ink); }

/* --------------------------------------------------------------------------
   6. Page hero (about block on the homepage)
   -------------------------------------------------------------------------- */

.hero {
    display: grid;
    grid-template-columns: minmax(0, 12rem) minmax(0, 1fr);
    gap: clamp(1.5rem, 4vw, 3rem);
    align-items: start;
    padding-block: clamp(2rem, 5vw, 3.25rem);
}

@media (max-width: 720px) {
    .hero { grid-template-columns: 1fr; }
    .hero__portrait { max-width: 10rem; }
}

.hero__portrait {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
    border: 1px solid var(--rule-strong);
    border-radius: var(--radius);
}

.hero h1 {
    font-size: var(--step-4);
    margin-bottom: 0.35rem;
}

/* The (π) picks up the accent, matching the wordmark in the header. */
.hero h1 span { color: var(--accent); }

.hero__tagline {
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--muted);
    margin-bottom: 1.35rem;
}

.hero__bio { max-width: var(--measure); }

.hero__contact {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--muted);
}

.hero__contact span,
.hero__contact a {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.hero__contact svg { color: var(--muted); }

/* --------------------------------------------------------------------------
   7. News timeline
   -------------------------------------------------------------------------- */

.news-year {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--ink);
    margin: 1.85rem 0 0.35rem;
}

.news-year:first-child { margin-top: 0; }

.news-year::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--rule);
}

.news-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.news-list li {
    display: grid;
    grid-template-columns: 8rem minmax(0, 1fr);
    gap: 1.25rem;
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--rule);
}

.news-list li:last-child { border-bottom: 0; }

.news-list time {
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--muted);
    padding-top: 0.15rem;
}

.news-list p {
    margin: 0;
    line-height: 1.6;
}

@media (max-width: 620px) {
    .news-list li {
        grid-template-columns: 1fr;
        gap: 0.3rem;
    }
}

/* --------------------------------------------------------------------------
   8. Project cards
   -------------------------------------------------------------------------- */

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 15rem), 1fr));
    gap: 1.25rem;
}

.card {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.15s ease;
}

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

.card__media {
    aspect-ratio: 16 / 10;
    overflow: hidden;
    border-bottom: 1px solid var(--rule);
    background: var(--paper-sunk);
}

.card__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.card__body {
    display: flex;
    flex-direction: column;
    flex: 1;
    padding: 1rem 1.1rem 1.1rem;
}

.card__venue {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.45rem;
}

.card__title {
    font-size: var(--step-0);
    font-weight: 600;
    line-height: 1.35;
    margin-bottom: 0.4rem;
}

.card__title a { color: inherit; }
.card:hover .card__title a { color: var(--accent); }

.card__blurb {
    font-size: var(--step--1);
    line-height: 1.55;
    color: var(--muted);
    margin: 0 0 0.9rem;
    flex: 1;
}

.card__more {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--accent);
}

.card__more::after {
    content: " \2192";
    transition: margin-left 0.15s ease;
}

.card:hover .card__more::after { margin-left: 0.2rem; }

/* Whole card is clickable; the title link stays the real link. */
.card__link::before {
    content: "";
    position: absolute;
    inset: 0;
}

/* --------------------------------------------------------------------------
   9. Project pages
   -------------------------------------------------------------------------- */

.backlink {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    transition: color 0.15s ease;
}

.backlink:hover { color: var(--accent); }
.backlink svg { transition: transform 0.15s ease; }
.backlink:hover svg { transform: translateX(-2px); }

.project-head {
    padding-block: 1.75rem 2rem;
    max-width: var(--measure);
}

.project-head h1 {
    font-size: var(--step-3);
    margin-bottom: 0.5rem;
}

.project-head__blurb {
    font-size: var(--step-0);
    color: var(--muted);
    margin-bottom: 1.25rem;
}

/* The standardized When / Where / What strip. Every project page carries
   exactly these three fields, in this order. */
.meta {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--rule);
    font-family: var(--mono);
    font-size: var(--step--1);
    color: var(--muted);
}

.meta div {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.meta svg {
    flex-shrink: 0;
    color: var(--rule-strong);
}

.project-figure {
    margin: 0 0 clamp(1.75rem, 4vw, 2.5rem);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--surface);
}

.project-figure img {
    width: 100%;
    max-height: 24rem;
    object-fit: cover;
}

/* Resource buttons at the foot of a project page. */
.resources {
    margin-top: clamp(2rem, 5vw, 3rem);
    padding-top: 1.5rem;
    border-top: 1px solid var(--rule);
    max-width: var(--measure);
}

.resources h2 {
    font-family: var(--mono);
    font-size: var(--step--2);
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.85rem;
}

.button-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.button {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--mono);
    font-size: var(--step--1);
    padding: 0.5rem 0.85rem;
    border-radius: var(--radius);
    border: 1px solid var(--accent);
    background: var(--accent);
    color: #fff;
    transition: background 0.15s ease, border-color 0.15s ease;
}

.button:hover {
    background: var(--accent-deep);
    border-color: var(--accent-deep);
}

.button--ghost {
    background: transparent;
    color: var(--accent);
}

.button--ghost:hover {
    background: var(--accent-wash);
    color: var(--accent-deep);
}

/* --------------------------------------------------------------------------
   10. Simple page headers (blog, art, tutoring, contact, personal)
   -------------------------------------------------------------------------- */

.page-head {
    padding-block: 1.5rem clamp(1.75rem, 4vw, 2.5rem);
    max-width: var(--measure);
}

.page-head h1 {
    font-size: var(--step-4);
    margin-bottom: 0.75rem;
}

.page-head__intro {
    font-size: var(--step-0);
    line-height: 1.65;
    color: var(--body);
}

.page-head__intro p + p { margin-top: 0.85em; }

/* --------------------------------------------------------------------------
   11. Blog list
   -------------------------------------------------------------------------- */

.post-list {
    display: grid;
    gap: 1.25rem;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
}

.post {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.15s ease;
}

.post:hover { border-color: var(--accent); }

.post__media {
    aspect-ratio: 16 / 9;
    border-bottom: 1px solid var(--rule);
    overflow: hidden;
}

.post__media img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.post__body { padding: 1.1rem; }

.post__date {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.45rem;
}

.post__title {
    font-size: var(--step-1);
    margin-bottom: 0.5rem;
}

.post__title a { color: inherit; }
.post:hover .post__title a { color: var(--accent); }
.post__title a::before { content: ""; position: absolute; inset: 0; }

.post__excerpt {
    font-size: var(--step--1);
    line-height: 1.6;
    color: var(--body);
    margin: 0;
}

/* --------------------------------------------------------------------------
   12. Art gallery
   -------------------------------------------------------------------------- */

.art-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 20rem), 1fr));
    gap: 2rem 1.5rem;
    align-items: start;
}

.art-piece__caption { margin-bottom: 0.65rem; }

.art-piece__title {
    font-size: var(--step-0);
    margin-bottom: 0.2rem;
}

.art-piece__note {
    font-size: var(--step--1);
    color: var(--muted);
    margin: 0;
}

/* Instagram's embed script rewrites these; the border keeps the unstyled
   placeholder from looking broken while it loads. */
.art-grid .instagram-media {
    margin: 0 !important;
    min-width: 0 !important;
    max-width: 100% !important;
    border: 1px solid var(--rule) !important;
    border-radius: var(--radius) !important;
    box-shadow: none !important;
}

/* --------------------------------------------------------------------------
   13. Side-by-side text + photo (personal page)
   -------------------------------------------------------------------------- */

.feature {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(0, 3fr);
    gap: clamp(1.25rem, 3.5vw, 2.25rem);
    align-items: start;
    margin-bottom: clamp(2rem, 5vw, 3rem);
}

.feature--flip { grid-template-columns: minmax(0, 3fr) minmax(0, 2fr); }
.feature--flip .feature__figure { order: 2; }

@media (max-width: 720px) {
    .feature,
    .feature--flip { grid-template-columns: 1fr; }
    .feature--flip .feature__figure { order: 0; }
}

.feature__figure { margin: 0; }

.feature__figure img {
    width: 100%;
    border: 1px solid var(--rule);
    border-radius: var(--radius);
}

.feature__figure figcaption {
    font-family: var(--mono);
    font-size: var(--step--2);
    line-height: 1.5;
    color: var(--muted);
    margin-top: 0.5rem;
}

/* --------------------------------------------------------------------------
   14. Info cards (contact, tutoring)
   -------------------------------------------------------------------------- */

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 18rem), 1fr));
    gap: 2rem;
    align-items: start;
}

.info-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.info-list li {
    display: flex;
    gap: 0.85rem;
    padding: 0.85rem 0;
    border-bottom: 1px solid var(--rule);
}

.info-list li:first-child { padding-top: 0; }
.info-list li:last-child { border-bottom: 0; }

.info-list__icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: grid;
    place-items: center;
    border-radius: var(--radius);
    background: var(--accent-wash);
    color: var(--accent);
}

.info-list__label {
    font-family: var(--mono);
    font-size: var(--step--2);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 0.15rem;
}

.info-list__value {
    margin: 0;
    color: var(--ink);
    line-height: 1.5;
}

.info-list__value a { color: var(--ink); }
.info-list__value a:hover { color: var(--accent); }

.link-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.85rem;
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    margin-bottom: 0.6rem;
    color: var(--ink);
    transition: border-color 0.15s ease;
}

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

.link-card svg { color: var(--accent); flex-shrink: 0; }

.link-card__name {
    font-family: var(--mono);
    font-weight: 500;
    font-size: var(--step--1);
}

.link-card__detail {
    font-size: var(--step--2);
    color: var(--muted);
    word-break: break-all;
}

.panel {
    background: var(--surface);
    border: 1px solid var(--rule);
    border-radius: var(--radius);
    padding: clamp(1.25rem, 3.5vw, 1.85rem);
}

.panel + .panel { margin-top: 1.25rem; }

.panel h2 {
    font-size: var(--step-1);
    margin-bottom: 0.6rem;
}

.panel h3 {
    font-size: var(--step-0);
    margin-bottom: 0.35rem;
}

.split {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 16rem), 1fr));
    gap: 1.5rem;
}

/* --------------------------------------------------------------------------
   15. Utilities
   -------------------------------------------------------------------------- */

.visually-hidden {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
    border: 0;
}

.text-muted { color: var(--muted); }
.mt-lg { margin-top: clamp(1.5rem, 4vw, 2.25rem); }

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}