/*
Theme Name: Delta H2O
Theme URI: https://dh2o.org
Author: Delta Water Lab
Description: Custom Hallmark-designed theme for the Delta Water Lab. Late-night Hong Kong signage over harbour water — a vertical neon signboard, condensed display type, glow only where a tube would be.
Version: 3.6.0
Requires PHP: 8.0
License: GPL-2.0-or-later
Text Domain: delta-h2o
*/

/* Hallmark · genre: atmospheric · macrostructure: Marquee Hero · nav: N5 floating pill · footer: Ft5 statement
 * theme: custom · vibe: "late-night Hong Kong signage, harbour water" · paper: oklch(15% 0.015 220) · accent: oklch(80% 0.14 200)
 * display: Barlow Condensed · body: Inter Tight · mono: IBM Plex Mono · axes: dark / display-condensed / cool
 * enrichment: Tier-B hand-built SVG (the Δ tube sign) · studied: no · context: user-provided (HK neon, less AI-apparent)
 * pre-emit critique: P4 H4 E4 S5 R4 V5
 */

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

html, body { overflow-x: clip; }
html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  font-size: var(--text-md);
  line-height: 1.65;
  color: var(--color-ink);
  background:
    radial-gradient(ellipse 55% 40% at 82% 4%, var(--glow-faint), transparent 65%),
    radial-gradient(ellipse 45% 35% at 8% 96%, oklch(70% 0.18 350 / 0.06), transparent 60%),
    var(--color-paper);
  background-attachment: fixed;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--color-accent); text-decoration: none; }
a:hover { text-decoration: underline; text-underline-offset: 3px; }
:focus-visible { outline: 2px solid var(--color-focus); outline-offset: 2px; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 var(--page-gutter); }

/* ---------- N5 · Floating pill nav ---------- */
.nav-pill {
  position: fixed; top: var(--space-md); left: 50%;
  transform: translateX(-50%);
  display: inline-flex; align-items: center; gap: var(--space-md);
  padding: 0.5rem 1rem;
  background: color-mix(in oklch, var(--color-paper) 78%, transparent);
  backdrop-filter: blur(14px) saturate(120%);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 24px -12px oklch(0% 0 0 / 0.5), 0 0 18px -6px var(--glow-faint);
  z-index: 20;
  max-width: calc(100vw - 2 * var(--space-sm));
}
.nav-pill .wordmark {
  font-family: var(--font-display);
  font-weight: 700; font-size: 1.15rem; letter-spacing: 0.04em;
  color: var(--color-ink); white-space: nowrap;
}
.nav-pill .wordmark:hover { text-decoration: none; color: var(--color-accent); }
.nav-pill__links {
  display: flex; gap: var(--space-sm); list-style: none;
  overflow-x: auto; scrollbar-width: none;
}
.nav-pill__links::-webkit-scrollbar { display: none; }
.nav-pill__links a {
  color: var(--color-ink-2); font-size: var(--text-sm); font-weight: 500;
  white-space: nowrap; padding: 0.15rem 0.1rem;
}
.nav-pill__links a:hover,
.nav-pill__links a[aria-current="page"] { color: var(--color-accent); text-decoration: none; }

/* ---------- Marquee fold ---------- */
.marquee {
  min-height: 92svh;
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: end;
  padding: calc(var(--space-3xl) + var(--space-lg)) var(--page-gutter) var(--space-2xl);
  gap: var(--space-lg);
}
.marquee h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-display);
  line-height: 0.92;
  letter-spacing: 0.01em;
  text-transform: uppercase;
  min-width: 0;
}
.marquee h1 .lit { color: var(--color-accent); }

/* The vertical signboard — HK signs hang perpendicular to the building */
.signboard {
  writing-mode: vertical-rl;
  display: inline-flex; align-items: center; gap: var(--space-sm);
  padding: var(--space-md) var(--space-xs);
  border: 2px solid var(--color-accent);
  border-radius: 10px;
  font-family: var(--font-display);
  font-weight: 600; font-size: var(--text-lg); letter-spacing: 0.22em;
  color: var(--color-accent);
  text-transform: uppercase;
  box-shadow: 0 0 10px var(--glow-faint), 0 0 26px -6px var(--glow-soft),
              inset 0 0 14px -6px var(--glow-faint);
  text-shadow: 0 0 8px var(--glow-soft);
  animation: tube-on 2.2s var(--ease-out) 1;
  align-self: stretch;
  justify-self: end;
}
.signboard .delta-mark { width: 34px; height: 34px; }
.signboard .delta-mark svg { width: 100%; height: 100%; display: block; }
@keyframes tube-on {
  0%, 12%  { opacity: .25; box-shadow: none; text-shadow: none; }
  14%      { opacity: 1; }
  18%, 22% { opacity: .3; box-shadow: none; text-shadow: none; }
  26%, 100% {
    opacity: 1;
    box-shadow: 0 0 10px var(--glow-faint), 0 0 26px -6px var(--glow-soft),
                inset 0 0 14px -6px var(--glow-faint);
    text-shadow: 0 0 8px var(--glow-soft);
  }
}

.rule-thick {
  border: 0; border-top: 4px solid var(--color-accent);
  box-shadow: 0 0 16px -2px var(--glow-soft);
  margin: 0;
}

/* ---------- Below-fold ---------- */
.intro { padding: var(--space-2xl) 0 var(--space-xl); }
.intro p {
  font-size: var(--text-lg); color: var(--color-ink-2);
  max-width: 58ch; text-wrap: pretty;
}
.intro p strong { color: var(--color-accent); font-weight: 650; }

.demo {
  margin-top: var(--space-lg); padding: var(--space-md);
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-card);
  max-width: 40rem;
}
.demo-label {
  font-family: var(--font-mono); font-size: var(--text-xs);
  letter-spacing: 0.08em; color: var(--color-muted);
  margin-bottom: var(--space-xs);
}
.demo form { display: flex; gap: var(--space-2xs); }
.demo input[type="text"] {
  flex: 1; padding: 0.7rem 1rem; font-size: var(--text-md);
  font-family: var(--font-body);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: var(--radius-input);
  background: var(--color-paper); color: var(--color-ink); min-width: 0;
}
.demo input[type="text"]::placeholder { color: var(--color-muted); }
.demo input[type="text"]:focus { outline: 2px solid var(--color-focus); border-color: transparent; }
.demo button {
  padding: 0.7rem 1.2rem; font-size: var(--text-md); font-weight: 600;
  font-family: var(--font-body);
  background: var(--color-accent); color: var(--color-accent-ink);
  border: 0; border-radius: var(--radius-input); cursor: pointer;
  transition: box-shadow var(--dur-short) var(--ease-out);
}
.demo button:hover { box-shadow: 0 0 18px -2px var(--glow-soft); }
.demo button:active { transform: translateY(1px); }
.demo .demo-note { margin-top: var(--space-2xs); font-size: var(--text-sm); color: var(--color-muted); }

/* ---------- Sections ---------- */
.section { padding: var(--space-2xl) 0; }
.section + .section { border-top: var(--rule-hair) solid var(--color-rule-2); }
.section-head {
  display: flex; align-items: baseline; justify-content: space-between;
  margin-bottom: var(--space-lg); gap: var(--space-sm); flex-wrap: wrap;
}
.section-head h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl); font-weight: 600;
  letter-spacing: 0.03em; text-transform: uppercase;
}
.section-head .more { font-size: var(--text-sm); }

/* Publications */
.pub {
  display: flex; gap: var(--space-md);
  padding: var(--space-sm) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule-2);
}
.pub:last-child { border-bottom: 0; }
.pub-year {
  flex: none; width: 3.6rem;
  font-family: var(--font-mono); font-size: var(--text-sm);
  color: var(--color-muted); padding-top: 0.2rem;
}
.pub-title { font-weight: 600; color: var(--color-ink); }
.pub-meta { font-size: var(--text-sm); color: var(--color-muted); margin-top: 0.15rem; }
.pub-meta strong { color: var(--color-ink-2); font-weight: 650; }
.pub-why {
  margin-top: 0.45rem; font-size: 0.97rem; color: var(--color-ink-2);
  padding-left: var(--space-xs);
  border-left: 3px solid var(--color-accent);
}
.pub-links { margin-top: 0.5rem; display: flex; gap: var(--space-sm); font-size: var(--text-sm); font-weight: 550; }
.pub-links .try { color: var(--color-accent-2); font-weight: 650; }
.pub-links .try:hover { color: var(--color-accent-2); text-shadow: 0 0 10px var(--glow-pink); }

/* Δ log */
.dlog-item {
  display: flex; gap: var(--space-md); align-items: baseline;
  padding: var(--space-xs) 0;
  border-bottom: var(--rule-hair) solid var(--color-rule-2);
}
.dlog-item:last-child { border-bottom: 0; }
.dlog-date {
  flex: none; width: 8rem;
  font-family: var(--font-mono); font-size: var(--text-sm);
  color: var(--color-muted);
}
.dlog-title { font-weight: 550; color: var(--color-ink); }
.dlog-title:hover { color: var(--color-accent); }
.dlog-excerpt { font-size: var(--text-sm); color: var(--color-muted); margin-top: 0.2rem; }

/* ---------- Articles / pages ---------- */
.article { padding: calc(var(--space-3xl) + var(--space-xl)) 0 var(--space-2xl); }
.article-header h1 {
  font-family: var(--font-display);
  font-size: var(--text-display-s); font-weight: 700;
  letter-spacing: 0.02em; line-height: 1.05; text-transform: uppercase;
  overflow-wrap: anywhere; min-width: 0;
}
.article-header .meta {
  margin-top: var(--space-2xs); color: var(--color-muted);
  font-family: var(--font-mono); font-size: var(--text-sm);
}
.article-aside {
  margin-top: var(--space-2xs);
  font-family: var(--font-mono); font-size: var(--text-sm);
  color: var(--color-muted);
}
/* Everything in the body shares one reading column — including rules, figures and
   anything added later — so the column edge stays consistent. Layout blocks and
   explicit wide/full alignments are the deliberate exceptions. */
.article-body { margin-top: var(--space-lg); }
.article-body > * { max-width: var(--measure); }
.article-body > .wp-block-media-text,
.article-body > .wp-block-columns,
.article-body > .wp-block-gallery,
.article-body > .wp-block-embed,
.article-body > .wp-block-table,
.article-body > .alignwide,
.article-body > .alignfull { max-width: none; }

.article-body h2 { font-family: var(--font-display); margin: var(--space-lg) 0 var(--space-xs); font-size: var(--text-xl); letter-spacing: 0.02em; }
.article-body h3 { margin: var(--space-md) 0 var(--space-2xs); font-size: var(--text-lg); }
.article-body p, .article-body ul, .article-body ol { margin-bottom: var(--space-sm); }
.article-body ul, .article-body ol { padding-left: 1.4rem; }

/* Media + text (people bios, project splits) */
.wp-block-media-text { gap: var(--space-lg); align-items: start; margin-bottom: var(--space-lg); }
.wp-block-media-text:not(.has-media-on-the-right) { grid-template-columns: minmax(0, 38%) minmax(0, 1fr); }
.wp-block-media-text.has-media-on-the-right { grid-template-columns: minmax(0, 1fr) minmax(0, 38%); }
.wp-block-media-text__media img { border-radius: 12px; display: block; height: auto; }
.wp-block-media-text__content { padding: 0; }
.wp-block-media-text__content > *:first-child { margin-top: 0; }

.wp-block-columns { gap: var(--space-lg); margin-bottom: var(--space-lg); }
.wp-block-image img { border-radius: 12px; }

/* Wide / full alignments, once the editor offers them */
.article-body .alignwide {
  width: min(76rem, calc(100vw - 2 * var(--page-gutter)));
  margin-left: 50%; transform: translateX(-50%);
}
.article-body .alignfull {
  width: 100vw; max-width: none;
  margin-left: 50%; transform: translateX(-50%);
}

@media (max-width: 768px) {
  .wp-block-media-text.is-stacked-on-mobile,
  .wp-block-media-text:not(.has-media-on-the-right),
  .wp-block-media-text.has-media-on-the-right { grid-template-columns: minmax(0, 1fr); }
}
.article-body img { max-width: 100%; height: auto; border-radius: 10px; }
.article-body blockquote { border-left: 3px solid var(--color-accent); padding-left: var(--space-sm); color: var(--color-ink-2); margin: var(--space-sm) 0; }
.article-body pre {
  background: var(--color-paper-2); border: var(--rule-hair) solid var(--color-rule);
  border-radius: 10px; padding: var(--space-sm); overflow-x: auto;
  font-family: var(--font-mono); font-size: var(--text-sm);
}

/* ---------- Lab members ---------- */
.members {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 14rem), 1fr));
  gap: var(--space-lg) var(--space-md);
}
.member-photo {
  aspect-ratio: 4 / 5;
  background: var(--color-paper-2);
  border: var(--rule-hair) solid var(--color-rule);
  border-radius: 12px;
  overflow: hidden;
  display: grid; place-items: center;
  margin-bottom: var(--space-xs);
}
.member-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.member-photo__empty {
  font-family: var(--font-display);
  font-size: 2.5rem; color: var(--color-rule);
}
.member-name {
  font-family: var(--font-display);
  font-size: var(--text-lg); font-weight: 600;
  letter-spacing: 0.02em; text-transform: uppercase;
  line-height: 1.15;
}
.member-role {
  font-family: var(--font-mono); font-size: var(--text-xs);
  color: var(--color-accent); margin-top: 0.15rem;
}
.member-bio {
  font-size: var(--text-sm); color: var(--color-ink-2);
  margin-top: var(--space-2xs);
}
.member-bio p { margin-bottom: var(--space-2xs); }
.member-bio p:last-child { margin-bottom: 0; }
.member-links {
  margin-top: var(--space-2xs);
  display: flex; gap: var(--space-sm);
  font-size: var(--text-sm); font-weight: 550;
}

/* ---------- Ft5 · Statement footer ---------- */
.foot-stmt {
  border-top: var(--rule-hair) solid var(--color-rule);
  margin-top: var(--space-2xl);
  padding: var(--space-2xl) 0 var(--space-xl);
}
.foot-stmt__line {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 600; line-height: 1.05; letter-spacing: 0.02em;
  text-transform: uppercase;
  max-width: 24ch;
  overflow-wrap: anywhere; min-width: 0;
}
.foot-stmt__line strong { color: var(--color-accent); font-weight: 700; }
.foot-stmt__meta {
  display: flex; justify-content: space-between; align-items: baseline; gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-lg); padding-top: var(--space-sm);
  border-top: var(--rule-hair) solid var(--color-rule-2);
  color: var(--color-muted); font-size: var(--text-sm);
}
.foot-stmt__meta .wordmark { font-family: var(--font-display); font-weight: 700; letter-spacing: 0.04em; color: var(--color-ink-2); }

/* Institutional affiliation — the official PolyU knot, unaltered, on transparent.
   The mark never glows; the lab wordmark beside it carries the naming. */
.foot-affil {
  display: inline-flex; align-items: center; gap: 0.6rem;
  opacity: 0.92;
  transition: opacity var(--dur-short) var(--ease-out);
}
.foot-affil:hover { text-decoration: none; opacity: 1; }
.foot-affil img { display: block; width: 30px; height: auto; flex: none; }

/* ---------- Motion & small screens ---------- */
@media (prefers-reduced-motion: reduce) {
  .signboard { animation: none; }
  html { scroll-behavior: auto; }
}

@media (max-width: 768px) {
  .marquee {
    grid-template-columns: minmax(0, 1fr);
    align-items: start; align-content: end;
    min-height: 88svh;
  }
  .signboard {
    writing-mode: horizontal-tb;
    align-self: start; justify-self: start;
    order: -1;
    padding: var(--space-xs) var(--space-md);
    font-size: var(--text-md);
  }
  .pub, .dlog-item { flex-direction: column; gap: 0.2rem; }
  .pub-year, .dlog-date { width: auto; }
  .demo form { flex-direction: column; }
  .nav-pill { gap: var(--space-sm); }
}