/* ==========================================================================
   AIBE — AI for Business & Entrepreneurship at UIUC
   Design system. Colors sampled from the AIBE logo:
     navy  #04264E   teal  #128673
   ========================================================================== */

/* --- Tokens --------------------------------------------------------------- */
:root {
  /* Brand constants — identical in every theme */
  --navy:        #04264E;
  --navy-deep:   #02162E;
  --navy-soft:   #0A2A52;
  --teal:        #128673;
  --teal-deep:   #0E6F5F;   /* 6.1:1 on white — safe for small text */
  --teal-bright: #4FD1B2;   /* 8.0:1 on navy  — safe on ink bands   */

  /* Light surfaces */
  --bg:        #F5F7F9;
  --bg-elev:   #FFFFFF;
  --bg-sunk:   #ECF0F4;
  --text:      #0B2241;     /* 14:1 on --bg */
  --text-2:    #51637C;     /* 5.2:1 on --bg */
  --text-3:    #6E7F96;
  --line:      rgba(4, 38, 78, 0.13);
  --line-soft: rgba(4, 38, 78, 0.07);
  --accent:    var(--teal-deep);
  --shadow-s:  0 1px 2px rgba(4,38,78,.06), 0 2px 8px rgba(4,38,78,.05);
  --shadow-m:  0 2px 4px rgba(4,38,78,.05), 0 12px 32px -8px rgba(4,38,78,.14);
  --shadow-l:  0 4px 8px rgba(4,38,78,.05), 0 28px 60px -16px rgba(4,38,78,.22);

  /* Type */
  --font-display: "Archivo", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Rhythm */
  --gutter: clamp(20px, 5vw, 56px);
  --measure: 1180px;
  --measure-text: 68ch;
  --band-y: clamp(72px, 10vw, 148px);
  --r-s: 10px;
  --r-m: 16px;
  --r-l: 24px;

  /* Motion */
  --ease: cubic-bezier(.22,.61,.36,1);
  --ease-out: cubic-bezier(.16,1,.3,1);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #061A33;
    --bg-elev:   #0A2446;
    --bg-sunk:   #04142A;
    --text:      #E8EEF7;
    --text-2:    #9FB2CB;
    --text-3:    #8296B2;
    --line:      rgba(255,255,255,.14);
    --line-soft: rgba(255,255,255,.07);
    --accent:    var(--teal-bright);
    --shadow-s:  0 1px 2px rgba(0,0,0,.3);
    --shadow-m:  0 12px 32px -8px rgba(0,0,0,.5);
    --shadow-l:  0 28px 60px -16px rgba(0,0,0,.6);
  }
}
:root[data-theme="dark"] {
  --bg:        #061A33;
  --bg-elev:   #0A2446;
  --bg-sunk:   #04142A;
  --text:      #E8EEF7;
  --text-2:    #9FB2CB;
  --text-3:    #8296B2;
  --line:      rgba(255,255,255,.14);
  --line-soft: rgba(255,255,255,.07);
  --accent:    var(--teal-bright);
  --shadow-s:  0 1px 2px rgba(0,0,0,.3);
  --shadow-m:  0 12px 32px -8px rgba(0,0,0,.5);
  --shadow-l:  0 28px 60px -16px rgba(0,0,0,.6);
}

/* --- Reset ---------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }
html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 96px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 17px;              /* Apple's default reading size, on the web */
  line-height: 1.62;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video, canvas { display: block; max-width: 100%; }
img, video { height: auto; }
a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
button { font: inherit; }

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

:focus-visible {
  outline: 2.5px solid var(--teal-bright);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: fixed; top: 10px; left: 10px; z-index: 200;
  transform: translateY(-200%);
  background: var(--navy); color: #fff;
  padding: 12px 18px; border-radius: var(--r-s);
  font-weight: 600; text-decoration: none;
}
.skip-link:focus-visible { transform: none; }

/* --- Type scale ----------------------------------------------------------- */
h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.025em;
  line-height: 1.06;
  margin: 0;
  text-wrap: balance;
}
.t-hero   { font-size: clamp(2.65rem, 7.4vw, 5.6rem); font-weight: 800; letter-spacing: -0.038em; }
.t-h1     { font-size: clamp(2.2rem, 5.6vw, 4rem);   font-weight: 800; letter-spacing: -0.034em; }
.t-h2     { font-size: clamp(1.75rem, 3.6vw, 2.75rem); letter-spacing: -0.028em; }
.t-h3     { font-size: clamp(1.18rem, 1.9vw, 1.45rem); letter-spacing: -0.018em; line-height: 1.25; }
.t-lead   { font-size: clamp(1.08rem, 1.7vw, 1.33rem); line-height: 1.55; color: var(--text-2); }
.t-body   { font-size: 1.0625rem; color: var(--text-2); }
.t-small  { font-size: 0.95rem; color: var(--text-2); }

.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8125rem;          /* 13px — above the 11pt floor */
  font-weight: 500;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  display: flex; align-items: center; gap: 10px;
  margin: 0 0 20px;
}
.eyebrow::before {
  content: ""; width: 26px; height: 2px; flex: none;
  background: currentColor; border-radius: 2px;
}

p { margin: 0 0 1.1em; max-width: var(--measure-text); }
p:last-child { margin-bottom: 0; }

/* --- Layout --------------------------------------------------------------- */
.wrap { width: 100%; max-width: var(--measure); margin-inline: auto; padding-inline: var(--gutter); }
.wrap--wide { max-width: 1420px; }
.wrap--narrow { max-width: 860px; }
.band { padding-block: var(--band-y); position: relative; }
.band--sunk { background: var(--bg-sunk); }
.band--elev { background: var(--bg-elev); }
.band--tight { padding-block: clamp(52px, 6vw, 86px); }

/* Ink surfaces keep brand colors in both themes.
   .callout and .next are dark cards sitting inside light bands, so they need
   the same token overrides as a full-width ink band — otherwise light-theme
   text colors land on navy. */
.band--ink, .callout, .next, .hero {
  color: #E3ECF7;
  --text: #E8EFF8;
  --text-2: #AFC2DA;
  --text-3: #93A8C4;
  --line: rgba(255,255,255,.16);
  --line-soft: rgba(255,255,255,.08);
  --accent: var(--teal-bright);
  --bg-elev: rgba(255,255,255,.045);
}
.band--ink { background: var(--navy-deep); }
.band--ink h1, .band--ink h2, .band--ink h3,
.callout h1, .callout h2, .callout h3,
.next h1, .next h2, .next h3 { color: #FFFFFF; }

.grid { display: grid; gap: clamp(18px, 2.4vw, 28px); }
.grid-2 { grid-template-columns: repeat(2, minmax(0,1fr)); }
.grid-3 { grid-template-columns: repeat(3, minmax(0,1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0,1fr)); }
@media (max-width: 1200px) { .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 960px) { .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0,1fr)); } }
@media (max-width: 680px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: clamp(32px, 6vw, 88px);
  align-items: start;
}
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } }
.sticky-col { position: sticky; top: 118px; }
@media (max-width: 900px) { .sticky-col { position: static; } }

.stack > * + * { margin-top: var(--s, 20px); }

/* --- Header --------------------------------------------------------------- */
.nav {
  position: fixed; inset: 0 0 auto 0; z-index: 90;
  transition: background .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
  border-bottom: 1px solid transparent;
}
.nav__in {
  max-width: 1420px; margin-inline: auto;
  padding: 14px var(--gutter);
  display: flex; align-items: center; gap: 24px;
}
.nav__logo { display: flex; align-items: center; gap: 11px; text-decoration: none; margin-right: auto; flex: none; }
.nav__logo img { height: 34px; width: auto; }
.nav__logo .lg-light { display: none; }
.nav--over .nav__logo .lg-dark { display: none; }
.nav--over .nav__logo .lg-light { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .nav__logo .lg-dark { display: none; }
  :root:not([data-theme="light"]) .nav__logo .lg-light { display: block; }
}
:root[data-theme="dark"] .nav__logo .lg-dark { display: none; }
:root[data-theme="dark"] .nav__logo .lg-light { display: block; }
@media (max-width: 1080px) {
  .nav[data-open="true"] .nav__logo .lg-light { display: none; }
  .nav[data-open="true"] .nav__logo .lg-dark { display: block; }
}
.nav__logo-text {
  font-family: var(--font-display); font-weight: 800; font-size: 1.22rem;
  letter-spacing: -0.03em; color: var(--nav-fg, var(--text)); line-height: 1;
}
.nav__logo-sub {
  display: block; font-family: var(--font-mono); font-size: 0.5625rem; font-weight: 500;
  letter-spacing: 0.1em; text-transform: uppercase; color: var(--nav-fg-2, var(--text-3));
  margin-top: 3px;
}
.nav__links { display: flex; align-items: center; gap: 2px; }
.nav__link {
  position: relative;
  padding: 10px 14px; min-height: 44px; display: inline-flex; align-items: center;
  font-size: 0.945rem; font-weight: 500; letter-spacing: -0.005em;
  color: var(--nav-fg-2, var(--text-2)); text-decoration: none;
  border-radius: 8px;
  transition: color .22s var(--ease), background .22s var(--ease);
}
.nav__link:hover { color: var(--nav-fg, var(--text)); background: var(--nav-hover, rgba(4,38,78,.055)); }
.nav__link[aria-current="page"] { color: var(--nav-fg, var(--text)); font-weight: 600; }
.nav__link[aria-current="page"]::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px;
  background: var(--teal-bright); border-radius: 2px;
}
.nav__cta { margin-left: 10px; }

/* over the ink hero */
.nav--over {
  --nav-fg: #FFFFFF; --nav-fg-2: #C3D3E8; --nav-hover: rgba(255,255,255,.1);
  background: transparent;
}
.nav--stuck {
  background: var(--bg);                                      /* fallback */
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  backdrop-filter: saturate(180%) blur(20px);
  border-bottom-color: var(--line-soft);
  box-shadow: 0 1px 24px -8px rgba(4,38,78,.18);
}
@supports not (backdrop-filter: blur(1px)) { .nav--stuck { background: var(--bg); } }
@media (prefers-reduced-transparency: reduce) {
  .nav--stuck { background: var(--bg); -webkit-backdrop-filter: none; backdrop-filter: none; }
}

.nav__burger {
  display: none; width: 44px; height: 44px; border: 0; background: none; cursor: pointer;
  align-items: center; justify-content: center; border-radius: 10px; color: var(--nav-fg, var(--text));
}
.nav__burger span { display: block; width: 19px; height: 1.8px; background: currentColor; border-radius: 2px; position: relative; transition: transform .3s var(--ease), opacity .2s; }
.nav__burger span::before, .nav__burger span::after {
  content: ""; position: absolute; left: 0; width: 19px; height: 1.8px; background: currentColor; border-radius: 2px;
  transition: transform .3s var(--ease);
}
.nav__burger span::before { top: -6px; } .nav__burger span::after { top: 6px; }
.nav[data-open="true"] .nav__burger span { background: transparent; }
.nav[data-open="true"] .nav__burger span::before { transform: translateY(6px) rotate(45deg); }
.nav[data-open="true"] .nav__burger span::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1080px) {
  .nav__burger { display: flex; }
  .nav__links {
    position: fixed; inset: 68px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 12px var(--gutter) 26px;
    box-shadow: var(--shadow-l);
    transform: translateY(-14px); opacity: 0; pointer-events: none;
    transition: transform .34s var(--ease), opacity .24s var(--ease);
  }
  .nav[data-open="true"] .nav__links { transform: none; opacity: 1; pointer-events: auto; }
  .nav__link { --nav-fg: var(--text); --nav-fg-2: var(--text-2); font-size: 1.0625rem; padding: 14px 4px; }
  .nav__link[aria-current="page"]::after { left: 4px; right: auto; width: 22px; bottom: 8px; }
  .nav__cta { margin: 14px 0 0; }
  .nav--over .nav__links { --nav-fg: var(--text); --nav-fg-2: var(--text-2); }
}

/* --- Buttons -------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  min-height: 48px; padding: 13px 24px;
  font-family: var(--font-body); font-size: 1rem; font-weight: 600; letter-spacing: -0.008em;
  border-radius: 999px; border: 1px solid transparent; cursor: pointer;
  text-decoration: none; white-space: nowrap;
  transition: transform .22s var(--ease), background .22s var(--ease),
              border-color .22s var(--ease), box-shadow .22s var(--ease), color .22s var(--ease);
}
.btn:active { transform: scale(.975); }
.btn svg { width: 17px; height: 17px; flex: none; }

.btn--primary { background: var(--teal-deep); color: #fff; box-shadow: 0 6px 18px -8px rgba(14,111,95,.8); }
.btn--primary:hover { background: #0B5C4E; box-shadow: 0 10px 26px -10px rgba(14,111,95,.9); }
.band--ink .btn--primary,
.callout .btn--primary,
.next .btn--primary,
.hero .btn--primary { background: var(--teal-bright); color: #02231D; box-shadow: 0 8px 26px -10px rgba(79,209,178,.7); }
.band--ink .btn--primary:hover,
.callout .btn--primary:hover,
.next .btn--primary:hover,
.hero .btn--primary:hover { background: #6EE0C4; }

.btn--solid { background: var(--navy); color: #fff; }
.btn--solid:hover { background: #063464; }

.btn--ghost { background: transparent; color: var(--text); border-color: var(--line); }
.btn--ghost:hover { border-color: var(--text-3); background: var(--bg-elev); }
.band--ink .btn--ghost,
.callout .btn--ghost,
.next .btn--ghost,
.hero .btn--ghost { color: #fff; border-color: rgba(255,255,255,.32); }
.band--ink .btn--ghost:hover,
.callout .btn--ghost:hover,
.next .btn--ghost:hover,
.hero .btn--ghost:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.55); }

.btn--discord { background: #5865F2; color: #fff; }
.btn--discord:hover { background: #4752E0; }
.btn--sm { min-height: 40px; padding: 9px 17px; font-size: 0.9rem; }

.btn[aria-disabled="true"] { opacity: .52; pointer-events: none; }

.btn-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }

/* --- Cards ---------------------------------------------------------------- */
.card {
  background: var(--bg-elev);
  border: 1px solid var(--line-soft);
  border-radius: var(--r-m);
  padding: clamp(22px, 2.6vw, 32px);
  position: relative;
  transition: transform .4s var(--ease), box-shadow .4s var(--ease), border-color .4s var(--ease);
}
.card--lift:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); border-color: var(--line); }
.card__k {
  font-family: var(--font-mono); font-size: 0.75rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
}
.card h3 { margin: 0 0 10px; }
:where(.card) p { font-size: 1rem; color: var(--text-2); }

.icon-badge {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: color-mix(in srgb, var(--teal) 13%, transparent);
  color: var(--accent); margin-bottom: 20px;
}
.icon-badge svg { width: 23px; height: 23px; }

/* Feature list with trajectory ticks */
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li {
  position: relative; padding-left: 30px; margin-bottom: 13px;
  color: var(--text-2); font-size: 1.0625rem;
}
.ticks li::before {
  content: ""; position: absolute; left: 3px; top: .62em;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--bg); border: 2.5px solid var(--teal);
}
.band--ink .ticks li::before,
.callout .ticks li::before { background: var(--navy-deep); border-color: var(--teal-bright); }

/* --- Stat strip ----------------------------------------------------------- */
.stats { display: grid; grid-template-columns: repeat(4, minmax(0,1fr)); gap: 1px; background: var(--line-soft); border-radius: var(--r-m); overflow: hidden; }
.stat { background: var(--bg); padding: clamp(22px,2.6vw,30px); }
.band--ink .stat { background: var(--navy-deep); }
.stat__n {
  font-family: var(--font-display); font-weight: 800; font-size: clamp(2rem, 3.6vw, 2.85rem);
  letter-spacing: -0.04em; line-height: 1; color: var(--text);
  font-variant-numeric: tabular-nums;
}
.stat__n em { font-style: normal; color: var(--accent); }
.stat__l { margin-top: 10px; font-size: 0.9rem; color: var(--text-2); line-height: 1.4; }
@media (max-width: 760px) { .stats { grid-template-columns: repeat(2, minmax(0,1fr)); } }

/* --- Hero ----------------------------------------------------------------- */
.hero {
  position: relative; isolation: isolate;
  min-height: min(100svh, 920px);
  display: flex; align-items: flex-end;
  padding-top: 132px; padding-bottom: clamp(44px, 7vh, 86px);
  background: var(--navy-deep);
  overflow: hidden;
}
.hero--short { min-height: 0; padding-top: clamp(140px, 19vh, 210px); padding-bottom: clamp(56px, 9vh, 104px); align-items: center; }

.hero__media { position: absolute; inset: 0; z-index: -2; overflow: hidden; }
.hero__media > video, .hero__media > canvas {
  position: absolute; inset: 0;          /* stacked, not stacked up */
  width: 100%; height: 100%; object-fit: cover;
}
.hero__media > video { opacity: 0; transition: opacity 1.1s var(--ease); }
.hero__media[data-video="on"] > video { opacity: 1; }
.hero__media[data-video="on"] > canvas { opacity: 0; transition: opacity 1.1s var(--ease); }

.hero__scrim {
  position: absolute; inset: 0; z-index: -1;
  background:
    linear-gradient(100deg, rgba(2,22,46,.95) 0%, rgba(2,22,46,.88) 30%, rgba(2,22,46,.56) 56%, rgba(2,22,46,.34) 100%),
    linear-gradient(180deg, rgba(2,22,46,.6) 0%, rgba(2,22,46,.1) 24%, rgba(2,22,46,.16) 58%, rgba(2,22,46,.74) 100%);
}

.hero__inner { position: relative; width: 100%; }
.hero__kicker {
  display: inline-flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: 0.78rem; font-weight: 500;
  letter-spacing: .13em; text-transform: uppercase; color: #BFF0E2; white-space: nowrap;
  background: rgba(79,209,178,.14); border: 1px solid rgba(79,209,178,.34);
  padding: 8px 15px; border-radius: 999px; margin-bottom: 26px;
  max-width: 100%; overflow: hidden; text-overflow: ellipsis;
}
@media (max-width: 560px) { .hero__kicker { font-size: .68rem; letter-spacing: .1em; padding: 7px 12px; } }
.hero__kicker .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--teal-bright); }
.hero h1 { color: #fff; max-width: 16ch; }
.hero h1 .accent {
  color: var(--teal-bright);
  /* the logo's trajectory, under the word it belongs to */
  background-image: linear-gradient(90deg, rgba(79,209,178,.35), var(--teal-bright) 42%, var(--teal-bright));
  background-repeat: no-repeat;
  background-position: 0 101%;
  background-size: var(--underline, 0%) 5px;
  transition: background-size 1.1s .55s var(--ease-out);
  padding-bottom: 2px;
}
.hero__sub { color: #C9DAEE; font-size: clamp(1.08rem, 1.6vw, 1.3rem); max-width: 54ch; margin-top: 26px; }
.hero__actions { margin-top: 34px; }
.hero__foot {
  margin-top: clamp(40px, 6vh, 72px); padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.14);
  display: flex; flex-wrap: wrap; gap: 14px 36px; align-items: center;
  font-size: 0.925rem; color: #A9BED8;
}
.hero__foot strong { color: #fff; font-weight: 600; }

.scroll-hint {
  position: absolute; right: var(--gutter); bottom: clamp(44px, 7vh, 86px);
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-mono); font-size: .7rem; letter-spacing: .16em;
  text-transform: uppercase; color: #8FA8C6; text-decoration: none;
}
.scroll-hint__rail { width: 1px; height: 54px; background: rgba(255,255,255,.2); position: relative; overflow: hidden; }
.scroll-hint__rail::after {
  content: ""; position: absolute; inset: 0 0 auto 0; height: 40%;
  background: var(--teal-bright); animation: railDrop 2.4s var(--ease) infinite;
}
@keyframes railDrop { 0% { transform: translateY(-100%); } 60%,100% { transform: translateY(260%); } }
@media (max-width: 900px) { .scroll-hint { display: none; } }

/* --- Trajectory spine (the logo's rising line, used as section nav) -------- */
.spine {
  position: fixed; left: 26px; top: 50%; transform: translateY(-50%);
  z-index: 60; display: none;
}
@media (min-width: 1180px) { .spine { display: block; } }
.spine__rail { position: absolute; left: 5px; top: 6px; bottom: 6px; width: 2px; background: var(--line); border-radius: 2px; overflow: hidden; }
.spine__fill { position: absolute; inset: 0 0 auto 0; height: 0; background: linear-gradient(180deg, var(--teal-bright), var(--teal)); border-radius: 2px; transition: height .18s linear; }
.spine__list { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 20px; }
.spine__dot {
  position: relative; display: flex; align-items: center; gap: 12px;
  width: 44px; height: 24px; text-decoration: none;
}
.spine__dot i {
  width: 12px; height: 12px; border-radius: 50%; flex: none;
  border: 2px solid var(--line); background: var(--bg);
  transition: transform .34s var(--ease), border-color .34s var(--ease), background .34s var(--ease);
}
.spine__dot b {
  font-family: var(--font-mono); font-size: .7rem; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-2); white-space: nowrap;
  opacity: 0; transform: translateX(-6px);
  transition: opacity .3s var(--ease), transform .3s var(--ease);
  background: var(--bg-elev); border: 1px solid var(--line-soft);
  padding: 5px 10px; border-radius: 7px; box-shadow: var(--shadow-s);
  pointer-events: none;
}
.spine:hover .spine__dot b, .spine__dot:focus-visible b { opacity: 1; transform: none; }
.spine__dot[aria-current="true"] i { border-color: var(--teal); background: var(--teal); transform: scale(1.3); }
.spine__dot:hover i { border-color: var(--teal); }

/* --- Program cards ------------------------------------------------------ */
.prog {
  display: grid; grid-template-columns: 92px 1fr; gap: clamp(16px, 2.4vw, 30px);
  padding: clamp(22px,2.6vw,30px) 0; border-top: 1px solid var(--line-soft);
  align-items: start;
}
.prog:last-child { border-bottom: 1px solid var(--line-soft); }
.prog__tag {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500; letter-spacing: .1em;
  text-transform: uppercase; color: var(--accent); padding-top: 5px;
}
.prog h3 { margin-bottom: 8px; }
@media (max-width: 680px) { .prog { grid-template-columns: 1fr; gap: 8px; } }

/* --- Timeline (semester arc) ---------------------------------------------- */
.timeline { list-style: none; margin: 0; padding: 0; position: relative; }
.timeline::before {
  content: ""; position: absolute; left: 11px; top: 14px; bottom: 14px; width: 2px;
  background: linear-gradient(180deg, var(--teal), color-mix(in srgb, var(--teal) 15%, transparent));
}
.timeline li { position: relative; padding: 0 0 clamp(28px,3.4vw,42px) 52px; }
.timeline li:last-child { padding-bottom: 0; }
.timeline li::before {
  content: ""; position: absolute; left: 4px; top: 7px; width: 16px; height: 16px;
  border-radius: 50%; background: var(--bg); border: 3px solid var(--teal);
}
.band--ink .timeline li::before { background: var(--navy-deep); border-color: var(--teal-bright); }
.timeline__w {
  font-family: var(--font-mono); font-size: .73rem; letter-spacing: .11em;
  text-transform: uppercase; color: var(--accent); display: block; margin-bottom: 7px;
}
.timeline h3 { font-size: 1.22rem; margin-bottom: 7px; }

/* --- Team ----------------------------------------------------------------- */
.person { text-align: left; }
.person__photo {
  position: relative; aspect-ratio: 4 / 5; border-radius: var(--r-m); overflow: hidden;
  background:
    radial-gradient(110% 80% at 30% 15%, color-mix(in srgb, var(--teal) 22%, transparent), transparent 62%),
    var(--bg-sunk);
  border: 1px solid var(--line-soft);
  display: grid; place-items: center;
  transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.person:hover .person__photo { transform: translateY(-5px); box-shadow: var(--shadow-m); }
.person__photo img { width: 100%; height: 100%; object-fit: cover; }
.person__ph {
  font-family: var(--font-display); font-weight: 800; font-size: 2.4rem;
  letter-spacing: -.04em; color: color-mix(in srgb, var(--teal) 55%, var(--text-3));
  display: grid; place-items: center; gap: 8px;
}
.person__ph small { display: block; font-family: var(--font-mono); font-size: .64rem; font-weight: 500; letter-spacing: .14em; color: var(--text-3); }
.person__role {
  font-family: var(--font-mono); font-size: .73rem; letter-spacing: .11em; text-transform: uppercase;
  color: var(--accent); margin: 18px 0 6px;
}
.person__name { font-family: var(--font-display); font-weight: 700; font-size: 1.22rem; letter-spacing: -.02em; }
.person__name[data-placeholder] { color: var(--text-3); font-weight: 600; }
.person__meta { font-size: .94rem; color: var(--text-2); margin-top: 5px; }
.person__links { display: flex; gap: 8px; margin-top: 12px; }
.person__links a {
  width: 34px; height: 34px; border-radius: 9px; display: grid; place-items: center;
  border: 1px solid var(--line); color: var(--text-2);
  transition: color .2s, border-color .2s, background .2s;
}
.person__links a:hover { color: var(--accent); border-color: var(--accent); background: color-mix(in srgb, var(--teal) 9%, transparent); }
.person__links svg { width: 16px; height: 16px; }

/* --- Steps ---------------------------------------------------------------- */
.step { display: grid; grid-template-columns: 56px 1fr; gap: 20px; align-items: start; }
.step__n {
  width: 44px; height: 44px; border-radius: 50%; display: grid; place-items: center;
  font-family: var(--font-mono); font-size: .95rem; font-weight: 600;
  border: 1.5px solid var(--teal); color: var(--accent);
  background: color-mix(in srgb, var(--teal) 8%, transparent);
}
.step h3 { margin-bottom: 7px; }

/* --- Accordion (FAQ) ------------------------------------------------------- */
.faq { border-top: 1px solid var(--line-soft); }
.faq details { border-bottom: 1px solid var(--line-soft); }
.faq summary {
  list-style: none; cursor: pointer; padding: 22px 44px 22px 0; position: relative;
  font-family: var(--font-display); font-weight: 600; font-size: 1.12rem; letter-spacing: -.015em;
  color: var(--text);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: ""; position: absolute; right: 8px; top: 50%; width: 11px; height: 11px;
  border-right: 2px solid var(--accent); border-bottom: 2px solid var(--accent);
  transform: translateY(-70%) rotate(45deg); transition: transform .3s var(--ease);
}
.faq details[open] summary::after { transform: translateY(-30%) rotate(-135deg); }
.faq__a { padding: 0 0 24px; color: var(--text-2); animation: faqIn .34s var(--ease); }
@keyframes faqIn { from { opacity: 0; transform: translateY(-6px); } }

/* --- Callout -------------------------------------------------------------- */
.callout {
  border-radius: var(--r-l); padding: clamp(28px, 4vw, 54px);
  background:
    radial-gradient(100% 140% at 100% 0%, rgba(18,134,115,.5) 0%, transparent 60%),
    var(--navy);
  color: #fff; position: relative; overflow: hidden;
}
.callout h2 { color: #fff; }
:where(.callout) p { color: #C2D4EA; }
.callout__mark {
  position: absolute; right: -40px; bottom: -58px; width: 300px; opacity: .085;
  pointer-events: none; user-select: none;
}

/* --- Pull quote ----------------------------------------------------------- */
.pull {
  font-family: var(--font-display); font-weight: 600;
  font-size: clamp(1.4rem, 3.1vw, 2.2rem); line-height: 1.26; letter-spacing: -.028em;
  max-width: 22ch; margin: 0;
}
.pull .accent { color: var(--accent); }

/* --- Notice --------------------------------------------------------------- */
.notice {
  display: flex; gap: 13px; align-items: flex-start;
  border: 1px dashed var(--line); border-radius: var(--r-s);
  padding: 15px 18px; font-size: .95rem; color: var(--text-2);
  background: color-mix(in srgb, var(--teal) 5%, transparent);
}
.notice svg { width: 18px; height: 18px; flex: none; color: var(--accent); margin-top: 2px; }

/* --- Footer --------------------------------------------------------------- */
.foot { background: var(--navy-deep); color: #AFC2DA; padding-block: clamp(56px, 7vw, 86px) 34px; }
.foot a { color: #D4E2F2; text-decoration: none; }
.foot a:hover { color: #fff; text-decoration: underline; }
.foot__grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: clamp(28px, 4vw, 54px); }
@media (max-width: 860px) { .foot__grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 520px) { .foot__grid { grid-template-columns: 1fr; } }
.foot__logo img { height: 40px; margin-bottom: 18px; }
.foot h4 {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500; letter-spacing: .13em;
  text-transform: uppercase; color: #7E97B8; margin: 0 0 16px;
}
.foot ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 11px; font-size: .97rem; }
.foot__bottom {
  margin-top: clamp(40px, 5vw, 64px); padding-top: 24px; border-top: 1px solid rgba(255,255,255,.12);
  display: flex; flex-wrap: wrap; gap: 12px 28px; justify-content: space-between;
  font-size: .86rem; color: #7E97B8;
}
.social { display: flex; gap: 9px; }
.social a {
  width: 42px; height: 42px; border-radius: 11px; display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.17); color: #D4E2F2;
  transition: background .22s var(--ease), border-color .22s var(--ease), transform .22s var(--ease);
}
.social a:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.45); transform: translateY(-2px); }
.social svg { width: 18px; height: 18px; }

/* --- Scroll reveal -------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
  transition-delay: var(--d, 0ms);
}
[data-reveal="left"]  { transform: translateX(-22px); }
[data-reveal="right"] { transform: translateX(22px); }
[data-reveal="scale"] { transform: scale(.975); }
.is-in[data-reveal] { opacity: 1; transform: none; }

.marquee-line { overflow: hidden; border-block: 1px solid var(--line-soft); padding-block: 18px; }
.marquee-line__track { display: flex; gap: 48px; width: max-content; animation: slide 42s linear infinite; }
.marquee-line span {
  font-family: var(--font-mono); font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--text-3); display: flex; align-items: center; gap: 48px; white-space: nowrap;
}
.marquee-line span::after { content: "◆"; color: var(--teal); font-size: .6rem; }
@keyframes slide { to { transform: translateX(-50%); } }
.marquee-line:hover .marquee-line__track { animation-play-state: paused; }

/* --- Reduced motion ------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  [data-reveal] { opacity: 1 !important; transform: none !important; }
  .hero h1 .accent { background-size: 100% 4px; }
  .marquee-line__track { animation: none; }
}

/* --- Events ---------------------------------------------------------------
   The calendar page. Rows are built by wireEvents() in js/aibe.js from the
   data in js/events.js.
   -------------------------------------------------------------------------- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.ev-bar {
  display: flex; flex-wrap: wrap; gap: 14px 20px; align-items: center;
  justify-content: space-between; margin-bottom: clamp(22px, 2.6vw, 34px);
  padding-bottom: 20px; border-bottom: 1px solid var(--line-soft);
}
.ev-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.chip {
  min-height: 38px; padding: 8px 15px; border-radius: 999px; cursor: pointer;
  font-family: var(--font-body); font-size: .9rem; font-weight: 500;
  background: transparent; color: var(--text-2);
  border: 1px solid var(--line);
  transition: background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.chip:hover { color: var(--text); border-color: var(--text-3); }
.chip[aria-pressed="true"] {
  background: var(--navy); border-color: var(--navy); color: #fff; font-weight: 600;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .chip[aria-pressed="true"] {
    background: var(--teal-bright); border-color: var(--teal-bright); color: #02231D;
  }
}
:root[data-theme="dark"] .chip[aria-pressed="true"] {
  background: var(--teal-bright); border-color: var(--teal-bright); color: #02231D;
}
.ev-count {
  font-family: var(--font-mono); font-size: .78rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-3); white-space: nowrap;
}

.ev-month {
  font-family: var(--font-mono); font-size: .76rem; font-weight: 500;
  letter-spacing: .14em; text-transform: uppercase; color: var(--accent);
  margin: clamp(30px, 3.4vw, 46px) 0 4px;
  padding-bottom: 10px; border-bottom: 1px solid var(--line-soft);
}
.ev-month:first-child { margin-top: 0; }

.ev-list { list-style: none; margin: 0; padding: 0; }
.ev {
  display: grid; grid-template-columns: 74px 1fr;
  gap: clamp(16px, 2.2vw, 28px);
  padding: clamp(20px, 2.2vw, 26px) 0;
  border-bottom: 1px solid var(--line-soft);
}
.ev__date {
  display: grid; justify-items: center; align-content: start; align-self: start;
  padding: 10px 0 12px; border-radius: var(--r-s);
  background: var(--bg-elev); border: 1px solid var(--line-soft);
  line-height: 1;
}
.ev__mon {
  font-family: var(--font-mono); font-size: .66rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent);
}
.ev__num {
  font-family: var(--font-display); font-weight: 800; font-size: 1.75rem;
  letter-spacing: -.035em; color: var(--text); margin: 6px 0 5px;
  font-variant-numeric: tabular-nums;
}
.ev__dow {
  font-family: var(--font-mono); font-size: .62rem; letter-spacing: .1em;
  text-transform: uppercase; color: var(--text-3);
}
.ev__body { min-width: 0; }
.ev__tag {
  font-family: var(--font-mono); font-size: .68rem; font-weight: 500;
  letter-spacing: .13em; text-transform: uppercase; color: var(--accent);
  margin: 0 0 7px;
}
.ev__title {
  font-family: var(--font-display); font-weight: 700;
  font-size: clamp(1.1rem, 1.7vw, 1.32rem); letter-spacing: -.02em;
  line-height: 1.22; margin: 0;
}
.ev__meta { font-size: .94rem; color: var(--text-2); margin: 7px 0 0; font-variant-numeric: tabular-nums; }
.ev__blurb { font-size: 1rem; color: var(--text-2); margin: 10px 0 0; max-width: 62ch; }
.ev__actions { display: flex; flex-wrap: wrap; gap: 9px; margin-top: 15px; }

@media (max-width: 560px) {
  .ev { grid-template-columns: 58px 1fr; gap: 14px; }
  .ev__num { font-size: 1.45rem; }
}

.ev-empty {
  border: 1px dashed var(--line); border-radius: var(--r-m);
  padding: clamp(26px, 3.4vw, 40px); text-align: center;
  color: var(--text-2); max-width: none;
}

.next {
  border-radius: var(--r-l); padding: clamp(28px, 4vw, 54px);
  background:
    radial-gradient(110% 150% at 100% 0%, rgba(18,134,115,.5) 0%, transparent 62%),
    var(--navy);
  position: relative; overflow: hidden;
}
.next__when {
  font-family: var(--font-mono); font-size: .82rem; letter-spacing: .05em;
  color: #BFF0E2; margin: 20px 0 0;
}

.ev-draft {
  display: flex; gap: 13px; align-items: flex-start;
  border: 1px solid color-mix(in srgb, var(--teal) 34%, transparent);
  border-radius: var(--r-s); padding: 15px 18px;
  background: color-mix(in srgb, var(--teal) 8%, transparent);
  font-size: .95rem; color: var(--text-2);
  margin-bottom: clamp(26px, 3vw, 38px);
}
.ev-draft svg { width: 18px; height: 18px; flex: none; color: var(--accent); margin-top: 2px; }
.ev-draft strong { color: var(--text); font-weight: 600; }

.rhythm { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); gap: 1px; background: var(--line-soft); border-radius: var(--r-m); overflow: hidden; }
.rhythm > div { background: var(--bg); padding: clamp(20px,2.4vw,28px); }
.band--ink .rhythm > div { background: var(--navy-deep); }
.rhythm dt {
  font-family: var(--font-mono); font-size: .72rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase; color: var(--accent); margin-bottom: 10px;
}
.rhythm dd { margin: 0; font-size: 1.02rem; color: var(--text-2); }
.rhythm dd strong { color: var(--text); font-weight: 600; display: block; font-family: var(--font-display); font-size: 1.1rem; letter-spacing: -.015em; margin-bottom: 4px; }
@media (max-width: 760px) { .rhythm { grid-template-columns: 1fr; } }

/* --- Sponsorship tiers ----------------------------------------------------- */
.tiers { align-items: start; }
.tier { display: flex; flex-direction: column; }
.tier__amt {
  font-family: var(--font-display); font-weight: 800;
  font-size: clamp(1.8rem, 2.8vw, 2.3rem); letter-spacing: -.04em; line-height: 1;
  color: var(--text); margin: 10px 0 20px; font-variant-numeric: tabular-nums;
}
.tier__amt span {
  display: block; font-family: var(--font-body); font-size: .88rem; font-weight: 400;
  letter-spacing: 0; color: var(--text-3); margin-top: 8px;
}
.tier__list { margin-top: auto; }
.tier__list li { font-size: 1rem; }
.tier--featured {
  border-color: color-mix(in srgb, var(--teal) 45%, transparent);
  box-shadow: var(--shadow-m);
}
.tier__flag {
  position: absolute; top: -11px; left: clamp(22px, 2.6vw, 32px);
  font-family: var(--font-mono); font-size: .66rem; font-weight: 500;
  letter-spacing: .12em; text-transform: uppercase;
  background: var(--teal-deep); color: #fff;
  padding: 5px 11px; border-radius: 999px; margin: 0;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .tier__flag { background: var(--teal-bright); color: #02231D; }
}
:root[data-theme="dark"] .tier__flag { background: var(--teal-bright); color: #02231D; }

.partner-strip {
  display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between;
  gap: 20px 32px;
}
.partner-strip .eyebrow { margin-bottom: 12px; }