/* ===================================================
   DS4CABS · ds4cabs.github.io
   =================================================== */

:root {
  --bg: #0b1020;
  --bg-soft: #0f1530;
  --bg-elev: #131a3a;
  --surface: rgba(255,255,255,0.04);
  --surface-2: rgba(255,255,255,0.07);
  --border: rgba(255,255,255,0.08);
  --border-strong: rgba(255,255,255,0.16);
  --text: #e7eaf6;
  --text-dim: #aab1cd;
  --text-mute: #7c84a3;
  --brand: #10b981;
  --brand-2: #6366f1;
  --brand-3: #22d3ee;
  --accent: #f472b6;
  --danger: #f87171;
  --warning: #fbbf24;
  --radius: 14px;
  --radius-lg: 22px;
  --shadow-lg: 0 30px 80px -20px rgba(0,0,0,0.5);
  --shadow-md: 0 12px 32px -10px rgba(0,0,0,0.45);
  --grad: linear-gradient(135deg, #10b981 0%, #22d3ee 45%, #6366f1 100%);
  --grad-soft: linear-gradient(135deg, rgba(16,185,129,.15), rgba(99,102,241,.15));

  --container: 1180px;
  --font: 'Inter', system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* ---------- light theme ---------- */
[data-theme="light"] {
  --bg: #f7f8fc;
  --bg-soft: #ffffff;
  --bg-elev: #ffffff;
  --surface: rgba(15,21,48,0.03);
  --surface-2: rgba(15,21,48,0.06);
  --border: rgba(15,21,48,0.08);
  --border-strong: rgba(15,21,48,0.16);
  --text: #0f1530;
  --text-dim: #4a5475;
  --text-mute: #6b7390;
  --grad-soft: linear-gradient(135deg, rgba(16,185,129,.10), rgba(99,102,241,.10));
  --shadow-lg: 0 30px 80px -20px rgba(20,30,80,0.15);
  --shadow-md: 0 12px 32px -10px rgba(20,30,80,0.12);
}

/* ---------- base ---------- */
* { box-sizing: border-box; }
html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px; /* keep anchor targets clear of sticky nav */
}
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background: var(--bg);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* visible focus for keyboard users */
:focus { outline: none; }
:focus-visible {
  outline: 2px solid var(--brand-3);
  outline-offset: 2px;
  border-radius: 6px;
}

/* search placeholder readable in both themes */
input::placeholder { color: var(--text-mute); opacity: 1; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--brand-3); }
p { color: var(--text-dim); margin: 0 0 1rem; }
h1, h2, h3, h4 { color: var(--text); margin: 0 0 .5rem; line-height: 1.2; letter-spacing: -0.01em; }
h2 { font-size: clamp(1.7rem, 2.5vw, 2.2rem); font-weight: 700; }
h3 { font-size: 1.15rem; font-weight: 600; }
img, svg { max-width: 100%; display: block; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ---------- nav ---------- */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  background: rgba(11, 16, 32, 0.78);                                   /* fallback */
  background: color-mix(in srgb, var(--bg) 78%, transparent);
  border-bottom: 1px solid var(--border);
}
[data-theme="light"] .nav { background: rgba(247, 248, 252, 0.82); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 12px;
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--text); flex-shrink: 0; }
.brand:hover { color: var(--text); }
.brand-text { display: flex; flex-direction: column; line-height: 1; }
.brand-text strong { font-weight: 800; letter-spacing: -0.02em; }
.brand-text small { color: var(--text-mute); font-size: .72rem; margin-top: 3px; }
.logo { display: inline-block; }

.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a {
  padding: 8px 12px; border-radius: 8px;
  color: var(--text-dim); font-weight: 500; font-size: .92rem;
  transition: color .15s, background .15s;
}
.nav-links a:hover { color: var(--text); background: var(--surface); }
.nav-links a.is-active { color: var(--text); background: var(--surface); }
.nav-links .btn { margin-left: 6px; }

.theme-toggle {
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  padding: 7px; border-radius: 8px;
  cursor: pointer; margin-left: 8px;
  display: inline-flex; align-items: center; justify-content: center;
  transition: color .15s, background .15s, border-color .15s;
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle .icon-sun  { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun  { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* mobile hamburger toggle — hidden on desktop */
.nav-toggle {
  display: none;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px; border-radius: 8px;
  cursor: pointer;
  align-items: center; justify-content: center;
}
.nav-toggle .icon-close { display: none; }
.nav-toggle[aria-expanded="true"] .icon-menu  { display: none; }
.nav-toggle[aria-expanded="true"] .icon-close { display: block; }

/* ---------- mobile nav drawer ---------- */
@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .brand-text small { display: none; }

  .nav-links {
    position: fixed;
    inset: 68px 0 auto 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 16px 20px 24px;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    transform: translateY(-12px);
    opacity: 0;
    pointer-events: none;
    transition: transform .2s ease, opacity .2s ease;
    max-height: calc(100vh - 68px);
    overflow-y: auto;
  }
  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links a {
    padding: 12px 14px;
    font-size: 1rem;
    border-radius: 10px;
  }
  .nav-links .btn { margin-left: 0; margin-top: 8px; justify-content: center; }
  .theme-toggle { margin-left: 0; margin-top: 8px; align-self: flex-start; }
}

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  padding: 11px 18px; border-radius: 10px;
  font-weight: 600; font-size: .92rem; cursor: pointer;
  border: 1px solid transparent;
  transition: transform .12s, background .15s, border-color .15s, color .15s, box-shadow .15s;
  user-select: none;
}
.btn:active { transform: translateY(1px); }
.btn-primary {
  background: var(--grad);
  color: white;
  box-shadow: 0 8px 28px -6px rgba(16,185,129,.45), 0 6px 22px -10px rgba(99,102,241,.6);
}
.btn-primary:hover { color: white; filter: brightness(1.08); }
.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--border-strong);
}
.btn-outline:hover { background: var(--surface); color: var(--text); }
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
}
.btn-ghost:hover { background: var(--surface-2); color: var(--text); }

/* ---------- hero ---------- */
.hero { position: relative; overflow: hidden; padding: 64px 0 80px; }
.hero-bg {
  position: absolute; inset: 0; z-index: 0; color: var(--border);
  pointer-events: none;
}
.grid-svg { position: absolute; inset: 0; width: 100%; height: 100%; opacity: .55; }
.blob {
  position: absolute; border-radius: 50%;
  filter: blur(70px); opacity: .55;
  animation: float 18s ease-in-out infinite;
}
.blob-1 { width: 520px; height: 520px; left: -120px; top: -120px; background: #10b981; opacity: .35; }
.blob-2 { width: 480px; height: 480px; right: -100px; top: 80px; background: #6366f1; opacity: .35; animation-delay: -6s; }
.blob-3 { width: 320px; height: 320px; left: 40%; bottom: -120px; background: #22d3ee; opacity: .25; animation-delay: -12s; }
@keyframes float {
  0%, 100% { transform: translate(0,0) scale(1); }
  50% { transform: translate(30px,-20px) scale(1.05); }
}
[data-theme="light"] .blob { opacity: .35; }
[data-theme="light"] .blob-1 { opacity: .20; }
[data-theme="light"] .blob-2 { opacity: .20; }
[data-theme="light"] .blob-3 { opacity: .14; }

.hero-inner {
  position: relative; z-index: 1;
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center;
}
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
}

.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim); font-size: .82rem; font-weight: 500;
  margin-bottom: 18px;
  max-width: 100%;
}
.eyebrow strong { color: var(--text); font-weight: 700; }
abbr[title] {
  text-decoration: none;
  border-bottom: 1px dotted var(--text-mute);
  cursor: help;
}
.dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--brand); box-shadow: 0 0 0 4px rgba(16,185,129,.18);
}
.display {
  font-size: clamp(2.1rem, 5vw, 3.6rem);
  font-weight: 800; letter-spacing: -0.025em;
  margin: 0 0 18px;
}
.lede { font-size: 1.08rem; max-width: 56ch; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 22px; }

.hero-stats {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px;
  margin-top: 38px; padding-top: 26px;
  border-top: 1px solid var(--border);
}
.hero-stats > div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 1.45rem; font-weight: 700; }
.hero-stats span { color: var(--text-mute); font-size: .82rem; margin-top: 2px; }
@media (max-width: 640px) {
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
}

/* hero terminal card */
.hero-card { perspective: 1000px; }
.terminal {
  background: linear-gradient(180deg, #0a0f25, #0a0f25);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  transform: rotate(-1deg);
  transition: transform .4s ease;
}
.terminal:hover { transform: rotate(0) translateY(-4px); }
@media (max-width: 980px) {
  .terminal { transform: none; }
  .terminal:hover { transform: translateY(-4px); }
}
@media (max-width: 520px) {
  .term-body { font-size: .76rem; padding: 14px 16px; }
}
.term-bar {
  display: flex; align-items: center; gap: 6px;
  padding: 12px 14px;
  background: #060a1b;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.term-bar span {
  width: 11px; height: 11px; border-radius: 50%;
  background: #ff5f56;
}
.term-bar span:nth-child(2) { background: #ffbd2e; }
.term-bar span:nth-child(3) { background: #27c93f; }
.term-bar em {
  margin-left: auto; font-style: normal; font-size: .78rem;
  color: #6b7390; font-family: var(--mono);
}
.term-body {
  margin: 0; padding: 20px 22px;
  font-family: var(--mono); font-size: .86rem;
  line-height: 1.7; color: #cbd2eb; overflow-x: auto;
}
.c-com { color: #6b7390; }
.c-str { color: #34d399; }
.c-flag { color: #c084fc; }
.c-ok { color: #34d399; }

/* ---------- sections ---------- */
.section { padding: 90px 0; position: relative; }
.section-alt { background: var(--bg-soft); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { max-width: 720px; margin: 0 auto 44px; text-align: center; }
.section-head h2 { font-size: clamp(1.7rem, 3vw, 2.4rem); margin-bottom: 8px; }
.section-head p { color: var(--text-dim); font-size: 1.04rem; }

.chip {
  display: inline-block;
  padding: 5px 12px; border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: .76rem; font-weight: 600;
  color: var(--text-dim); margin-bottom: 12px;
  letter-spacing: .04em; text-transform: uppercase;
}
.chip-accent {
  background: var(--grad-soft);
  border-color: rgba(99,102,241,.35);
  color: var(--text);
}

/* ---------- cards grid ---------- */
.cards {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
}
.cards-featured { grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); }
.cards-interns { grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); }

.card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 22px;
  display: flex; flex-direction: column;
  transition: transform .15s, border-color .15s, background .15s, box-shadow .15s;
  overflow: hidden;
}
.card::before {
  content: ""; position: absolute; inset: 0;
  background: var(--grad-soft);
  opacity: 0; transition: opacity .2s;
  pointer-events: none;
}
.card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow-md);
}
.card:hover::before { opacity: 1; }
.card > * { position: relative; z-index: 1; }

.card-head {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 10px;
  margin-bottom: 8px;
}
.card-title { font-size: 1.05rem; font-weight: 700; letter-spacing: -.01em; }
.card-title a { color: var(--text); }
.card-title a:hover { color: var(--brand-3); }
.card-lang {
  font-size: .72rem; color: var(--text-mute);
  padding: 3px 8px; border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  white-space: nowrap;
}
.card p { font-size: .92rem; margin: 0 0 14px; color: var(--text-dim); }
.card-meta {
  margin-top: auto;
  display: flex; gap: 12px; align-items: center;
  font-size: .8rem; color: var(--text-mute);
}
.card-meta .pill {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 8px; border-radius: 999px;
  background: var(--surface-2); border: 1px solid var(--border);
}
.card-tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: .7rem; font-weight: 600;
  background: var(--grad-soft);
  color: var(--text);
  border: 1px solid var(--border);
  margin-bottom: 12px;
  width: fit-content;
}

/* featured cards bigger */
.cards-featured .card { padding: 28px; }
.cards-featured .card-title { font-size: 1.2rem; }

/* intern cards: emphasis on author */
.card-author {
  font-size: .8rem; color: var(--text-mute);
  margin-top: 8px; font-family: var(--mono);
}

/* ---------- people: mentors, interns, leadership ---------- */
.cards-people { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }

.person-card {
  padding: 22px;
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 14px;
  align-items: start;
}
.avatar {
  width: 64px; height: 64px;
  border-radius: 50%;
  overflow: hidden;
  background: var(--grad);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  border: 1px solid var(--border-strong);
}
.avatar-img {
  width: 100%; height: 100%;
  object-fit: cover; display: block;
}
.avatar-initials {
  color: white;
  font-weight: 700;
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  font-family: var(--font);
  user-select: none;
}
.avatar-link {
  cursor: pointer;
  text-decoration: none;
  transition: transform 0.15s ease, box-shadow 0.15s ease;
}
.avatar-link:hover,
.avatar-link:focus-visible {
  transform: scale(1.05);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  outline: none;
}

.person-body { display: flex; flex-direction: column; min-width: 0; }
.person-name {
  font-size: 1.05rem;
  font-weight: 700;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
  color: var(--text);
}
.person-meta {
  font-size: .85rem;
  color: var(--text-mute);
  margin: 0 0 10px;
  line-height: 1.45;
}
.person-tags {
  display: flex; flex-wrap: wrap; gap: 4px;
  margin: 0 0 12px;
}
.person-tag {
  display: inline-block;
  padding: 2px 9px;
  border-radius: 999px;
  font-size: .72rem;
  font-weight: 500;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-dim);
  line-height: 1.4;
}

.person-project {
  display: flex; align-items: flex-start; gap: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  color: var(--text);
  margin-bottom: 10px;
  transition: border-color .15s, transform .15s;
}
.person-project:hover {
  color: var(--text);
  border-color: var(--border-strong);
  transform: translateY(-1px);
}
.person-project-icon { font-size: .95rem; line-height: 1.4; flex-shrink: 0; }
.person-project-text { display: flex; flex-direction: column; min-width: 0; line-height: 1.4; }
.person-project-text strong { font-size: .88rem; font-weight: 700; }
.person-project-text em {
  font-style: normal;
  font-size: .78rem;
  color: var(--text-dim);
  margin-top: 2px;
}

.person-links {
  display: flex; gap: 8px;
  margin-top: auto;
}
.person-link {
  width: 28px; height: 28px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: color .15s, background .15s, border-color .15s;
}
.person-link:hover {
  color: var(--text);
  background: var(--surface-2);
  border-color: var(--border-strong);
}

/* empty-state CTA shown when a people array is empty */
.empty-cta {
  text-align: center;
  padding: 40px 20px;
  background: var(--surface);
  border: 1px dashed var(--border-strong);
  border-radius: var(--radius-lg);
}
.empty-cta p { margin: 0 0 16px; color: var(--text-dim); }

/* responsive: stack avatar above content on very narrow cards */
@media (max-width: 380px) {
  .person-card { grid-template-columns: 1fr; }
  .avatar { width: 56px; height: 56px; }
}

/* ---------- toolbar / filters ---------- */
.toolbar {
  display: flex; align-items: center; gap: 14px; flex-wrap: wrap;
  margin-bottom: 26px;
}
.search {
  flex: 1; min-width: 240px;
  display: flex; align-items: center; gap: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 10px 14px;
  color: var(--text-mute);
  cursor: text;
  transition: border-color .15s, background .15s, color .15s;
}
.search:focus-within { border-color: var(--brand); color: var(--text); background: var(--surface-2); }
.search input {
  flex: 1; border: 0; outline: 0; background: transparent;
  color: var(--text); font-family: inherit; font-size: .95rem;
  min-width: 0;
}
.filters { display: flex; gap: 6px; flex-wrap: wrap; }
.filter-pill {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text-dim); font-size: .82rem; font-weight: 500;
  cursor: pointer; line-height: 1;
  transition: color .15s, background .15s, border-color .15s;
  font-family: inherit;
}
.filter-pill:hover { color: var(--text); border-color: var(--border-strong); }
.filter-pill[aria-pressed="true"] {
  background: var(--grad);
  color: white;
  border-color: transparent;
}
.filter-pill .count {
  font-size: .72rem; opacity: .7; font-variant-numeric: tabular-nums;
}
.filter-pill[aria-pressed="true"] .count { opacity: .85; }
.empty {
  text-align: center; color: var(--text-mute); padding: 40px 0;
}

.see-more { text-align: center; margin-top: 32px; }
.link-arrow {
  display: inline-flex; align-items: center; gap: 6px;
  font-weight: 600; color: var(--brand-3);
  transition: gap .15s;
}
.link-arrow:hover { gap: 10px; }

/* ---------- join / recruit 2026 ---------- */
.facts {
  list-style: none; padding: 0; margin: 0 0 36px;
  display: grid; gap: 12px;
  grid-template-columns: repeat(4, 1fr);
}
@media (max-width: 820px) { .facts { grid-template-columns: repeat(2, 1fr); } }
.facts li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  display: flex; flex-direction: column;
}
.facts strong { font-size: 1.02rem; font-weight: 700; color: var(--text); letter-spacing: -.01em; }
.facts span { color: var(--text-mute); font-size: .82rem; margin-top: 4px; }

.cards-join { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.role-card { padding: 26px; }
.role-card .card-tag { margin-bottom: 14px; }
.role-card h3 { font-size: 1.25rem; margin-bottom: 8px; }
.role-card > p { font-size: .94rem; }
.role-list {
  list-style: none; padding: 0; margin: 4px 0 20px;
  display: flex; flex-direction: column; gap: 8px;
}
.role-list li {
  position: relative; padding-left: 20px;
  font-size: .9rem; color: var(--text-dim);
}
.role-list li::before {
  content: ""; position: absolute; left: 4px; top: .55em;
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--grad);
}
.role-card .btn { margin-top: auto; align-self: flex-start; }

.timeline {
  margin-top: 44px; padding: 28px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.timeline h3 { margin-bottom: 18px; font-size: 1rem; text-transform: uppercase; letter-spacing: .12em; color: var(--text-mute); font-weight: 600; }
.timeline-list {
  list-style: none; padding: 0; margin: 0;
  display: grid; gap: 14px;
  grid-template-columns: repeat(4, 1fr);
  position: relative;
}
.timeline-list::before {
  content: ""; position: absolute;
  left: 8px; right: 8px; top: 7px; height: 2px;
  background: linear-gradient(90deg, var(--brand), var(--brand-3), var(--brand-2));
  opacity: .45; border-radius: 2px;
}
.timeline-list li {
  display: flex; flex-direction: column; gap: 2px;
  position: relative; padding-top: 22px;
}
.t-dot {
  position: absolute; top: 1px; left: 0;
  width: 14px; height: 14px; border-radius: 50%;
  background: var(--bg-soft);
  border: 2px solid var(--brand-3);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand-3) 25%, transparent);
}
.timeline-list strong { font-size: .95rem; color: var(--text); font-weight: 700; }
.timeline-list em { font-style: normal; font-size: .82rem; color: var(--text-mute); }
@media (max-width: 820px) {
  .timeline-list { grid-template-columns: 1fr; gap: 18px; }
  .timeline-list::before {
    left: 7px; right: auto; top: 8px; bottom: 8px;
    width: 2px; height: auto;
    background: linear-gradient(180deg, var(--brand), var(--brand-3), var(--brand-2));
  }
  .timeline-list li { padding-top: 0; padding-left: 28px; }
  .t-dot { top: 3px; left: 1px; }
}

.contact-strip {
  margin: 28px 0 0; text-align: center;
  font-size: .92rem; color: var(--text-dim);
}
.contact-strip a { color: var(--brand-3); font-weight: 600; }
.contact-strip a:hover { color: var(--text); }
.contact-strip .sep { color: var(--text-mute); margin: 0 6px; }

/* ---------- learn ---------- */
.learn-grid {
  display: grid; gap: 18px;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}
.learn-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex; flex-direction: column;
  transition: transform .15s, border-color .15s, background .15s;
  color: var(--text);
}
.learn-card:hover {
  transform: translateY(-3px);
  border-color: var(--border-strong);
  background: var(--surface-2);
  color: var(--text);
}
.learn-icon {
  width: 44px; height: 44px; border-radius: 12px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  margin-bottom: 14px;
}
.learn-card h3 { margin-bottom: 6px; }
.learn-card p { font-size: .92rem; flex: 1; }
.learn-card .link-arrow { margin-top: 10px; }

/* ---------- about ---------- */
.about-grid {
  display: grid; gap: 40px; grid-template-columns: 1.4fr 1fr;
  align-items: start;
}
@media (max-width: 820px) {
  .about-grid { grid-template-columns: 1fr; }
}
.about-side {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 26px;
}
.about-side h3 { margin-bottom: 14px; }
.tag-list {
  list-style: none; padding: 0; margin: 0;
  display: flex; flex-direction: column; gap: 10px;
}
.tag-list li {
  padding: 10px 12px; border-radius: 10px;
  background: var(--bg);
  border: 1px solid var(--border);
  font-size: .92rem; color: var(--text-dim);
}

/* ---------- footer ---------- */
.footer {
  border-top: 1px solid var(--border);
  background: var(--bg-soft);
  padding: 56px 0 36px;
}
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 32px;
}
.footer-inner nav { display: flex; flex-direction: column; gap: 8px; }
.footer-inner h4 { font-size: .8rem; text-transform: uppercase; letter-spacing: .12em; color: var(--text-mute); margin-bottom: 8px; }
.footer-inner a { color: var(--text-dim); font-size: .92rem; }
.footer-inner a:hover { color: var(--text); }
.footer-note { color: var(--text-mute); font-size: .82rem; margin-top: 16px; max-width: 44ch; }
@media (max-width: 700px) {
  .footer-inner { grid-template-columns: 1fr; }
}

/* ---------- subtle entrance ---------- */
@media (prefers-reduced-motion: no-preference) {
  .card, .learn-card {
    opacity: 0; transform: translateY(10px);
    animation: rise .5s ease forwards;
  }
  .card:nth-child(1)  { animation-delay: .02s; }
  .card:nth-child(2)  { animation-delay: .06s; }
  .card:nth-child(3)  { animation-delay: .10s; }
  .card:nth-child(4)  { animation-delay: .14s; }
  .card:nth-child(5)  { animation-delay: .18s; }
  .card:nth-child(6)  { animation-delay: .22s; }
  .card:nth-child(7)  { animation-delay: .26s; }
  .card:nth-child(8)  { animation-delay: .30s; }
  .card:nth-child(9)  { animation-delay: .34s; }
  @keyframes rise {
    to { opacity: 1; transform: translateY(0); }
  }
}

/* selection */
::selection { background: rgba(16,185,129,.35); color: white; }