/* ═══════════════════════════════════════════════════════════════
   subpage-hero.css  —  Canonical hero components for all subpages
   Single source of truth: eyebrow · title · subtitle · chips ·
   impact banner · recruiter TL;DR · divider · section headings
   Load AFTER style.css and themes.css, BEFORE page-specific styles
═══════════════════════════════════════════════════════════════ */

/* ── BACK BUTTON — inline above title ── */
.back-to-portfolio {
  display: inline-flex; align-items: center; gap: 6px;
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: 0.06em;
  color: var(--text3); text-decoration: none;
  padding: 6px 12px; border-radius: 6px;
  border: 1px solid var(--border); background: transparent;
  margin-bottom: 28px;
  transition: color 0.18s, border-color 0.18s, background 0.18s;
}
.back-to-portfolio:hover {
  color: var(--text2); border-color: var(--border2); background: var(--surface2);
}

/* ── END-OF-PAGE BACK NAV — subtle centered button after closing card ── */
.dp-end-nav {
  display: flex; justify-content: center;
  margin-top: 36px; padding-top: 28px;
  border-top: 1px solid var(--border2);
}
.dp-end-nav-btn {
  display: inline-flex !important; align-items: center; gap: 7px;
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 11.5px; font-weight: 600; letter-spacing: 0.05em;
  color: var(--text3); text-decoration: none;
  padding: 9px 18px !important; border-radius: 7px;
  border: 1px solid var(--border); background: transparent;
  margin-bottom: 0 !important;
  transition: all 0.18s ease;
}
.dp-end-nav-btn svg { width: 12px; height: 12px; flex-shrink: 0; transition: transform 0.18s ease; }
.dp-end-nav-btn:hover {
  color: var(--accent);
  border-color: var(--accent-dim, rgba(201,168,76,.45));
  background: var(--accent-glow, rgba(201,168,76,0.07));
  transform: translateY(-1px);
  box-shadow: 0 3px 10px rgba(201,168,76,0.10);
}
.dp-end-nav-btn:hover svg { transform: translateX(-3px); }


/* ── EYEBROW / OVERLINE ── */
.dp-hero-eyebrow {
  font-family: 'DM Mono', 'JetBrains Mono', monospace;
  font-size: 10px; letter-spacing: 0.18em; text-transform: uppercase;
  color: var(--accent); opacity: 0.85; margin-bottom: 14px;
}

/* ── PAGE TITLE & SUBTITLE ── */
.dp-page-title {
  font-family: 'Source Serif 4', serif;
  font-size: 52px; font-weight: 600;
  color: var(--text); line-height: 1.05; margin-bottom: 16px;
  letter-spacing: -0.01em;
}
.dp-page-subtitle {
  font-family: 'Source Serif 4', serif;
  font-style: italic; font-size: 19px;
  color: var(--text2); line-height: 1.65; margin-bottom: 26px;
  max-width: 600px;
}

/* ── CHIPS / META ROW ── */
.dp-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-bottom: 4px; }
.dp-chip {
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 10px;
  padding: 3px 9px; border-radius: 4px; letter-spacing: 0.04em;
  border: 1px solid var(--border2); background: var(--surface); color: var(--text3);
  transition: border-color 0.15s; white-space: nowrap;
}
.dp-chip.purple { background: rgba(155,127,212,0.08); border-color: rgba(155,127,212,0.22); color: var(--purple); }
.dp-chip.gold   { background: rgba(201,168,76,0.07);  border-color: rgba(201,168,76,0.22);  color: var(--accent); }
.dp-chip.blue   { background: rgba(91,159,212,0.07);  border-color: rgba(91,159,212,0.22);  color: var(--blue); }
.dp-chip.green  { background: rgba(93,186,138,0.07);  border-color: rgba(93,186,138,0.22);  color: var(--green); }
.dp-chip.red    { background: rgba(220,100,100,0.07); border-color: rgba(220,100,100,0.22); color: #dc6464; }
.dp-chip.orange { background: rgba(220,140,60,0.07);  border-color: rgba(220,140,60,0.22);  color: #e08040; }

/* ── IMPACT BANNER ── */
.dp-impact-banner {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 0; margin: 36px 0 0;
  border: 1px solid var(--border2); border-radius: 12px;
  overflow: hidden; background: var(--surface);
}
.dp-impact-cell {
  padding: 22px 16px; text-align: center;
  border-right: 1px solid var(--border);
  position: relative; transition: background 0.2s;
}
.dp-impact-cell:last-child { border-right: none; }
.dp-impact-cell:hover { background: var(--surface2); }
.dp-impact-cell::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
}
/* Color sequence — overrideable per page with nth-child */
.dp-impact-cell:nth-child(1)::before { background: var(--accent); }
.dp-impact-cell:nth-child(2)::before { background: var(--blue); }
.dp-impact-cell:nth-child(3)::before { background: var(--green); }
.dp-impact-cell:nth-child(4)::before { background: var(--purple); }
.dp-impact-cell:nth-child(5)::before { background: var(--red, #d45b5b); }
.dp-impact-num {
  font-family: 'Outfit', 'Manrope', sans-serif;
  font-size: 28px; font-weight: 300; color: var(--text);
  line-height: 1; margin-bottom: 5px; letter-spacing: -0.03em;
}
.dp-impact-label {
  font-family: 'Source Serif 4', serif;
  font-size: 10px; font-weight: 500; color: var(--text3);
  letter-spacing: 0.06em; text-transform: uppercase; line-height: 1.4;
}
/* Num color per column — overrideable */
.dp-impact-cell:nth-child(1) .dp-impact-num { color: var(--accent); }
.dp-impact-cell:nth-child(2) .dp-impact-num { color: var(--blue); }
.dp-impact-cell:nth-child(3) .dp-impact-num { color: var(--green); }
.dp-impact-cell:nth-child(4) .dp-impact-num { color: var(--purple); }
.dp-impact-cell:nth-child(5) .dp-impact-num { color: var(--red, #d45b5b); }

/* ── RECRUITER TL;DR ── */
.dp-tldr {
  background: var(--surface); border: 1px solid var(--border2);
  border-radius: 12px; padding: 28px 32px;
  margin: 36px 0 0; position: relative; overflow: hidden;
}
.dp-tldr::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--blue), var(--purple), transparent);
}
.dp-tldr-label {
  font-family: 'DM Mono', 'JetBrains Mono', monospace;
  font-size: 9px; letter-spacing: 0.16em; text-transform: uppercase;
  color: var(--text3); margin-bottom: 10px;
}
.dp-tldr-title  { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 8px; }
.dp-tldr-body   { font-size: 13px; color: var(--text2); line-height: 1.75; margin-bottom: 14px; }
.dp-tldr-impact {
  font-size: 12.5px; color: var(--text2); line-height: 1.7;
  padding: 10px 14px; background: var(--surface2); border-radius: 6px;
  border-left: 2px solid var(--accent); margin-bottom: 18px;
}
.dp-tldr-impact span {
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 9px;
  color: var(--text3); display: block; margin-bottom: 3px;
  letter-spacing: 0.12em; text-transform: uppercase;
}
.dp-skills-row { display: flex; flex-wrap: wrap; gap: 5px; }
.dp-skill-tag {
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 9.5px; padding: 3px 9px;
  border-radius: 4px; background: var(--surface2); border: 1px solid var(--border2); color: var(--text3);
  transition: border-color 0.18s, color 0.18s, background 0.18s; cursor: default;
}
.dp-skill-tag:hover { border-color: var(--accent); color: var(--accent); background: rgba(201,168,76,0.05); }

/* ── DIVIDER ── */
.dp-hr {
  height: 1px;
  background: linear-gradient(90deg, var(--border2) 0%, transparent 80%);
  margin: 44px 0;
}

/* ── SECTION HEADINGS ── */
.dp-h2 {
  font-family: 'Source Serif 4', serif;
  font-size: 26px; font-weight: 600;
  color: var(--text); margin-bottom: 4px; margin-top: 48px;
  display: flex; align-items: center; gap: 12px;
}
section:first-of-type .dp-h2,
.dp-hr + section .dp-h2 { margin-top: 0; }
.dp-h3 {
  font-family: 'DM Mono', 'JetBrains Mono', monospace;
  font-size: 10px; color: var(--text3);
  letter-spacing: 0.12em; text-transform: uppercase;
  margin-bottom: 22px; padding-bottom: 10px;
  border-bottom: 1px solid var(--border);
}

/* ── BODY TEXT ── */
.dp-body { font-size: 13.5px; line-height: 1.9; color: var(--text2); margin-bottom: 14px; }
.dp-body strong { color: var(--text); font-weight: 500; }
.dp-body em { color: var(--accent); font-style: normal; }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .dp-page-title { font-size: 38px; }
  .dp-impact-banner { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 540px) {
  .dp-page-title { font-size: 28px; }
  .dp-page-subtitle { font-size: 16px; }
  .dp-impact-banner { grid-template-columns: repeat(2, 1fr); }
  .dp-tldr { padding: 20px 18px; }
}

/* ═══════════════════════════════════════════════════════════════
   UNIFIED LINK BUTTONS  —  dp-link-btn
   One consistent shape/position/color system for every external
   action in a hero: live site, GitHub/source, PDF/report, preprint.
   Color code (fixed across the whole portfolio):
     live      → green   (it's running, it's "go")
     github    → gold/accent (brand-neutral default)
     pdf       → blue    (a document)
     preprint  → green   (published record / Zenodo)
═══════════════════════════════════════════════════════════════ */
.dp-link-row { margin-top: 18px; margin-bottom: 22px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; position: relative; z-index: 20; }

.dp-link-btn {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: 'DM Mono', 'JetBrains Mono', monospace;
  padding: 9px 16px;
  background: var(--surface2);
  border: 1px solid var(--border2);
  border-radius: 8px;
  text-decoration: none;
  color: var(--text2);
  cursor: pointer; user-select: none;
  transition: all 0.18s ease;
  position: relative;
}
.dp-link-btn svg { flex-shrink: 0; opacity: 0.75; transition: opacity 0.15s; width: 15px; height: 15px; }
.dp-link-btn:hover svg { opacity: 1; }
.dp-link-btn-text { font-size: 12px; font-weight: 600; letter-spacing: 0.03em; }
.dp-link-btn-sub {
  font-size: 10px; color: var(--text3);
  border-left: 1px solid var(--border2);
  padding-left: 10px;
  transition: color 0.15s;
  white-space: nowrap;
}
.dp-link-btn:hover .dp-link-btn-sub { color: inherit; }
.dp-link-btn:hover { transform: translateY(-1px); }

/* Default hover (GitHub / generic) — gold/accent */
.dp-link-btn:hover {
  border-color: var(--accent-dim, rgba(201,168,76,.45));
  color: var(--accent);
  background: var(--accent-glow, rgba(201,168,76,0.07));
  box-shadow: 0 4px 14px rgba(201,168,76,0.12);
}

/* Live / Website / Demo — green, filled, with pulsing dot */
.dp-link-btn.live {
  background: var(--green); border-color: var(--green); color: #fff;
}
.dp-link-btn.live .dp-link-btn-sub { color: rgba(255,255,255,0.75); border-left-color: rgba(255,255,255,0.3); }
.dp-link-btn.live:hover {
  opacity: .9; transform: translateY(-1px);
  border-color: var(--green); color: #fff;
  background: var(--green); box-shadow: 0 4px 14px rgba(42,122,75,0.28);
}
.dp-link-btn.live:hover .dp-link-btn-sub { color: rgba(255,255,255,0.85); }
.dp-link-btn-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #fff; flex-shrink: 0;
  animation: dpLinkPulse 1.8s infinite;
}
@keyframes dpLinkPulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(.7)} }

/* PDF / Technical Report / Paper — blue */
.dp-link-btn.pdf:hover {
  border-color: rgba(91,159,212,0.5) !important;
  color: var(--blue, #5B9FD4) !important;
  background: rgba(91,159,212,0.08) !important;
  box-shadow: 0 4px 14px rgba(91,159,212,0.14) !important;
}
.dp-link-btn.pdf:hover .dp-link-btn-sub { color: var(--blue, #5B9FD4) !important; }

/* Preprint / Zenodo / Published record — green outline */
.dp-link-btn.preprint:hover {
  border-color: rgba(93,186,138,0.5) !important;
  color: var(--green, #5DBA8A) !important;
  background: rgba(93,186,138,0.08) !important;
  box-shadow: 0 4px 14px rgba(93,186,138,0.14) !important;
}
.dp-link-btn.preprint:hover .dp-link-btn-sub { color: var(--green, #5DBA8A) !important; }

/* GitHub — explicit class for clarity, same as default hover */
.dp-link-btn.github:hover {
  border-color: var(--accent-dim, rgba(201,168,76,.45)) !important;
  color: var(--accent) !important;
  background: var(--accent-glow, rgba(201,168,76,0.07)) !important;
  box-shadow: 0 4px 14px rgba(201,168,76,0.12) !important;
}

/* ink theme overrides */
[data-theme="ink"] .dp-link-btn {
  background: #F5F2E8; border-color: #C4BDA8; color: #3E3A32;
}
[data-theme="ink"] .dp-link-btn:hover {
  border-color: rgba(139,94,25,0.45); color: #8B5E19;
  background: rgba(139,94,25,0.06); box-shadow: 0 4px 12px rgba(139,94,25,0.1);
}
[data-theme="ink"] .dp-link-btn:hover .dp-link-btn-sub { color: #8B5E19; }
[data-theme="ink"] .dp-link-btn.live { background: #246640; border-color: #246640; color: #fff; }
[data-theme="ink"] .dp-link-btn.live:hover { background: #246640; border-color: #246640; color: #fff; }
[data-theme="ink"] .dp-link-btn.pdf:hover {
  border-color: rgba(39,82,160,0.4) !important; color: #2752A0 !important; background: rgba(39,82,160,0.06) !important;
}
[data-theme="ink"] .dp-link-btn.pdf:hover .dp-link-btn-sub { color: #2752A0 !important; }
[data-theme="ink"] .dp-link-btn.preprint:hover {
  border-color: rgba(36,102,64,0.4) !important; color: #246640 !important; background: rgba(36,102,64,0.07) !important;
}
[data-theme="ink"] .dp-link-btn.preprint:hover .dp-link-btn-sub { color: #246640 !important; }

/* ── PDF LANGUAGE DROPDOWN — shared shape for any .dp-link-btn used as a dropdown trigger ── */
.dp-link-dropdown { position: relative; display: inline-block; z-index: 10; }
.dp-link-dropdown .dp-link-btn { margin: 0; }
.dp-link-dropdown .dropdown-caret {
  width: 10px; height: 10px; margin-left: -2px; flex-shrink: 0;
  transition: transform .2s; opacity: .7;
}
.dp-link-dropdown.open .dropdown-caret { transform: rotate(180deg); }
.dp-link-dropdown-menu {
  display: none;
  position: absolute; top: calc(100% + 8px); left: 0;
  min-width: 210px;
  background: var(--surface2);
  border: 1px solid rgba(201,168,76,.38);
  border-radius: 8px; padding: 6px; z-index: 1000;
  box-shadow: 0 8px 28px rgba(0,0,0,.35);
  animation: dpLinkDropFade .15s ease;
}
@keyframes dpLinkDropFade {
  from { opacity: 0; transform: translateY(-4px); }
  to   { opacity: 1; transform: translateY(0); }
}
/* Drop-up variant — opens above the button */
.dp-link-dropdown.drop-up .dp-link-dropdown-menu {
  top: auto; bottom: calc(100% + 8px);
  animation: dpLinkDropUpFade .15s ease;
}
@keyframes dpLinkDropUpFade {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}
.dp-link-dropdown.open .dp-link-dropdown-menu { display: block; }
.dp-link-dropdown-menu a {
  display: flex; align-items: center; gap: 9px;
  padding: 8px 12px; border-radius: 5px; text-decoration: none;
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 11px; letter-spacing: .05em;
  color: var(--text2); transition: background .12s, color .12s;
}
.dp-link-dropdown-menu a:hover { background: rgba(201,168,76,.1); color: var(--accent); }
.dp-link-dropdown-menu a svg { width: 12px; height: 12px; flex-shrink: 0; opacity: .75; }
.dp-link-dropdown-menu .lang-badge {
  display: inline-flex; align-items: center; justify-content: center;
  width: 24px; height: 16px; border-radius: 3px;
  background: rgba(201,168,76,.15); border: 1px solid rgba(201,168,76,.3);
  font-family: 'DM Mono', 'JetBrains Mono', monospace; font-size: 9px; font-weight: 500;
  letter-spacing: .06em; color: var(--accent); flex-shrink: 0;
}
.dp-link-dropdown-menu .lang-label { flex: 1; }
.dp-link-dropdown-menu .lang-sub { font-size: 9px; opacity: .5; letter-spacing: .08em; text-transform: uppercase; }