/* ===== AI Innovation Sprint — Innovation Hub ===== */
:root {
  --navy: #3B4965;
  --navy-footer: #2f3b52;
  --lav: #8C82C6;
  --lav-hover: #7a6fbb;
  --lav-tint: #BCB6E2;
  --lav-wash: #F1EFF9;
  --sage: #8D9B9C;
  --taupe: #C0A392;
  --teal: #5CA1A3;
  --orange: #E29357;
  --coral: #D77171;
  --olive: #909366;
  --brown: #876B5B;
  --white: #ffffff;
  --border: #e7e9ef;
  --border-lav: #e2ddf3;
  --star-empty: #d8d5e6;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: 'Source Sans 3', system-ui, sans-serif;
  color: var(--navy);
  line-height: 1.6;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--lav); text-decoration: none; }
a:hover { color: var(--navy); }
::selection { background: var(--lav-tint); color: var(--navy); }
img { max-width: 100%; }
h1, h2, h3, h4 { margin: 0; }
p { margin: 0; }

.wrap { max-width: 1180px; margin: 0 auto; padding-left: 40px; padding-right: 40px; }

/* ===== Header ===== */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: #fff; border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 12px rgba(59,73,101,0.05);
}
.site-header--hero {
  background: rgba(59,73,101,0.82);
  backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.12);
  box-shadow: none;
}
.site-header__inner {
  display: flex; align-items: center; justify-content: space-between; gap: 24px;
  padding-top: 18px; padding-bottom: 18px;
}
.brand { display: flex; align-items: center; }
.brand img { height: 30px; width: auto; display: block; }
.nav { display: flex; align-items: center; gap: 34px; }
.nav a { font-size: 15px; font-weight: 500; color: var(--sage); }
.nav a:hover { color: var(--navy); }
.nav a.is-active { color: var(--navy); font-weight: 600; }
.site-header--hero .nav a { color: rgba(255,255,255,0.8); }
.site-header--hero .nav a:hover { color: #fff; }
.site-header--hero .nav a.is-active { color: #fff; font-weight: 600; }
.btn-pill {
  background: var(--lav); color: #fff !important; font-weight: 600; font-size: 15px;
  padding: 11px 22px; border-radius: 999px;
}
.btn-pill:hover { background: var(--lav-hover); color: #fff; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer; padding: 8px; margin: -8px -8px -8px 0;
}
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--navy); margin: 5px 0; border-radius: 2px; }
.site-header--hero .nav-toggle span { background: #fff; }

/* ===== Buttons ===== */
.btn-cta {
  display: inline-block; background: var(--lav); color: #fff !important; font-weight: 700;
  font-size: 17px; padding: 16px 34px; border-radius: 999px;
  box-shadow: 0 14px 34px rgba(140,130,198,0.4); border: none; cursor: pointer;
}
.btn-cta:hover { background: var(--lav-hover); }

/* ===== Eyebrows / headings ===== */
.eyebrow {
  color: var(--lav); font-weight: 700; font-size: 13px; letter-spacing: 0.2em;
  text-transform: uppercase; margin-bottom: 14px;
}
.eyebrow--tint { color: var(--lav-tint); }
.page-title { font-size: 48px; font-weight: 700; letter-spacing: -0.02em; }
.section-h { font-size: 34px; font-weight: 700; letter-spacing: -0.01em; color: var(--navy); }

/* ===== Hero ===== */
.hero { position: relative; overflow: hidden; background: var(--navy); color: #fff; }
.hero__texture {
  position: absolute; right: -60px; bottom: -60px; width: 520px; height: 520px;
  background-image: radial-gradient(rgba(188,182,226,0.55) 2px, transparent 2px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(circle at 100% 100%, #000 0%, transparent 68%);
  mask-image: radial-gradient(circle at 100% 100%, #000 0%, transparent 68%);
  pointer-events: none;
}
.hero__inner { padding-top: 96px; padding-bottom: 104px; position: relative; }
.badge {
  position: absolute; top: 78px; right: 40px; width: 150px; height: 150px; border-radius: 50%;
  background: var(--lav);
  display: flex; align-items: center; justify-content: center; padding: 26px;
}
.badge__logo { width: 100%; height: 100%; object-fit: contain; display: block; }
.hero__body { max-width: 760px; }
.hero h1 { font-size: 66px; line-height: 1.04; font-weight: 700; letter-spacing: -0.02em; margin: 18px 0 14px; }
.hero__subline { color: var(--lav-tint); font-size: 21px; font-weight: 600; margin-bottom: 20px; }
.hero__lead { font-size: 20px; line-height: 1.55; color: rgba(255,255,255,0.86); max-width: 620px; margin-bottom: 36px; }
.pillars { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 40px; }
.pillar {
  display: flex; align-items: center; gap: 10px;
  background: rgba(255,255,255,0.08); border: 1px solid rgba(255,255,255,0.16);
  padding: 12px 20px; border-radius: 999px; font-weight: 600; font-size: 15px;
}
.pillar span { color: var(--lav-tint); }

/* ===== Numbered cards ===== */
.section-intro { max-width: 640px; margin-bottom: 52px; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 34px 34px 38px;
}
.card__num { font-size: 30px; font-weight: 700; }
.card__rule { width: 44px; height: 3px; border-radius: 2px; margin: 10px 0 18px; }
.card h3 { font-size: 22px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.card p { color: var(--sage); font-size: 16.5px; }
/* accent helpers */
.ac-teal { color: var(--teal); } .bg-teal { background: var(--teal); } .bd-teal { border-top-color: var(--teal); }
.ac-orange { color: var(--orange); } .bg-orange { background: var(--orange); } .bd-orange { border-top-color: var(--orange); }
.ac-coral { color: var(--coral); } .bg-coral { background: var(--coral); } .bd-coral { border-top-color: var(--coral); }
.ac-olive { color: var(--olive); } .bg-olive { background: var(--olive); } .bd-olive { border-top-color: var(--olive); }
.ac-brown { color: var(--brown); } .bg-brown { background: var(--brown); } .bd-brown { border-top-color: var(--brown); }

/* ===== In a nutshell ===== */
.nutshell {
  background: var(--lav-wash); border: 1px solid var(--border-lav); border-radius: 20px;
  padding: 40px 44px; display: flex; align-items: center; gap: 28px;
}
.nutshell__icon {
  flex: none; width: 64px; height: 64px; border-radius: 50%; background: var(--lav);
  display: flex; align-items: center; justify-content: center;
}
.nutshell__label { color: var(--lav); font-weight: 700; font-size: 13px; letter-spacing: 0.16em; text-transform: uppercase; margin-bottom: 6px; }
.nutshell p { font-size: 22px; font-weight: 600; color: var(--navy); line-height: 1.4; }

/* ===== Steps (5-up) ===== */
.steps { display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px; }
.step { border-top: 3px solid; padding-top: 20px; }
.step__num { font-size: 26px; font-weight: 700; }
.step h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin: 8px 0; }
.step p { color: var(--sage); font-size: 15px; }

/* ===== Journey (navy band timeline) ===== */
.band-navy { background: var(--navy); color: #fff; }
.journey { padding: 80px 0; }
.journey__sub { color: var(--lav-tint); font-weight: 600; margin-bottom: 44px; }
.timeline { display: grid; grid-template-columns: repeat(6, 1fr); position: relative; }
.timeline__line { position: absolute; left: 0; right: 0; top: 9px; height: 2px; background: rgba(255,255,255,0.18); }
.tl-item { position: relative; padding-right: 16px; }
.tl-item:last-child { padding-right: 0; }
.tl-dot { width: 18px; height: 18px; border-radius: 50%; background: var(--lav); border: 3px solid var(--navy); box-shadow: 0 0 0 2px var(--lav); }
.tl-wk { color: var(--lav-tint); font-weight: 700; font-size: 12px; letter-spacing: 0.1em; margin: 18px 0 6px; }
.tl-item h4 { font-size: 15px; font-weight: 700; margin-bottom: 6px; }
.tl-item p { font-size: 13.5px; color: rgba(255,255,255,0.72); }

/* ===== Team / submission cards ===== */
.card-top { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 28px; border-top: 4px solid; }
.card-top h3 { font-size: 18px; font-weight: 700; color: var(--navy); margin-bottom: 10px; }
.card-top p { color: var(--sage); font-size: 15px; }
.card-sub { background: #fff; border: 1px solid var(--border); border-radius: 16px; padding: 30px; }
.card-sub .card__rule { width: 40px; margin: 8px 0 14px; }
.card-sub h3 { font-size: 19px; font-weight: 700; color: var(--navy); margin-bottom: 8px; }
.card-sub p { color: var(--sage); font-size: 15.5px; }
.card-sub .card__num { font-size: 26px; }

/* ===== Submission recipe ===== */
.recipe {
  margin-top: 24px; background: var(--lav-wash); border: 1px solid var(--border-lav);
  border-radius: 16px; padding: 26px 30px; display: flex; flex-wrap: wrap; align-items: center; gap: 12px;
}
.recipe__label { color: var(--lav); font-weight: 700; font-size: 13px; letter-spacing: 0.14em; text-transform: uppercase; margin-right: 6px; }
.chip { background: #fff; border: 1px solid var(--border-lav); border-radius: 999px; padding: 7px 15px; font-weight: 600; font-size: 14px; color: var(--navy); }

/* ===== Tracks ===== */
.tracks { display: flex; flex-wrap: wrap; gap: 14px; }
.track {
  display: flex; align-items: center; gap: 12px; background: #fff;
  border: 1px solid var(--border); border-left: 5px solid; border-radius: 12px;
  padding: 18px 24px; font-weight: 700; color: var(--navy); font-size: 17px;
}
.bl-teal { border-left-color: var(--teal); }
.bl-orange { border-left-color: var(--orange); }
.bl-coral { border-left-color: var(--coral); }
.bl-olive { border-left-color: var(--olive); }
.bl-brown { border-left-color: var(--brown); }

/* ===== Examples ===== */
.group-head { display: flex; align-items: center; gap: 14px; margin-bottom: 22px; }
.group-dot { width: 10px; height: 10px; border-radius: 50%; }
.group-head h3 { font-size: 15px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--navy); }
.group-line { flex: 1; height: 1px; background: var(--border); }
.examples { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 20px; }
.example { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 26px; }
.example__head { display: flex; justify-content: space-between; align-items: baseline; gap: 12px; margin-bottom: 8px; }
.example h4 { font-size: 18px; font-weight: 700; color: var(--navy); }
.example p { color: var(--sage); font-size: 15px; }
.stars { color: var(--lav); font-size: 15px; letter-spacing: 1px; white-space: nowrap; }
.stars .off { color: var(--star-empty); }

/* ===== Register band ===== */
.register { position: relative; overflow: hidden; background: var(--navy); color: #fff; }
.register__texture {
  position: absolute; left: -40px; top: -40px; width: 340px; height: 340px;
  background-image: radial-gradient(rgba(188,182,226,0.4) 2px, transparent 2px);
  background-size: 22px 22px;
  -webkit-mask-image: radial-gradient(circle at 0 0, #000 0%, transparent 70%);
  mask-image: radial-gradient(circle at 0 0, #000 0%, transparent 70%);
  pointer-events: none;
}
.register__inner {
  position: relative; padding-top: 72px; padding-bottom: 72px;
  display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center;
}
.register h2 { font-size: 38px; font-weight: 700; letter-spacing: -0.02em; margin-bottom: 14px; line-height: 1.1; }
.register__lead { font-size: 17px; color: rgba(255,255,255,0.78); max-width: 420px; }
.form-card { background: #fff; border-radius: 20px; padding: 34px; box-shadow: 0 24px 60px rgba(0,0,0,0.28); }
.form { display: flex; flex-direction: column; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.hp { position: absolute; left: -9999px; top: -9999px; }
.form label { display: block; font-size: 13px; font-weight: 600; color: var(--navy); margin-bottom: 6px; }
.form input {
  width: 100%; padding: 13px 15px; border: 1.5px solid #d9dce4; border-radius: 10px;
  font-size: 15px; font-family: inherit; color: var(--navy);
}
.form input:focus { border-color: var(--lav); outline: none; }
.req { color: var(--coral); }
.form-submit {
  background: var(--lav); color: #fff; border: none; font-weight: 700; font-size: 16px;
  padding: 15px; border-radius: 10px; cursor: pointer; font-family: inherit; margin-top: 4px;
}
a.form-submit { display: block; text-align: center; text-decoration: none; }
.form-submit:hover { background: var(--lav-hover); }
.form-submit:disabled { opacity: 0.65; cursor: default; }
.form-status { min-height: 20px; font-size: 14px; font-weight: 600; }
.form-note { font-size: 12.5px; color: var(--sage); text-align: center; }

/* ===== Footer ===== */
.site-footer { background: var(--navy-footer); color: rgba(255,255,255,0.8); }
.site-footer__inner {
  padding-top: 34px; padding-bottom: 34px; display: flex; flex-wrap: wrap; gap: 16px;
  justify-content: space-between; align-items: center; font-size: 14.5px;
}
.site-footer__copy { color: rgba(255,255,255,0.6); }

/* ===== Responsive ===== */
@media (max-width: 960px) {
  .grid-2, .grid-4, .steps, .register__inner { grid-template-columns: 1fr; }
  .timeline { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .timeline__line { display: none; }
  .hero h1 { font-size: 46px; }
  .page-title { font-size: 36px; }
  .badge { position: static; margin-bottom: 28px; }
  .nav-toggle { display: block; }
  .nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 24px rgba(59,73,101,0.12); padding: 8px 0;
  }
  .site-header.is-open .nav { display: flex; }
  .nav a { padding: 14px 40px; font-size: 16px; color: var(--navy); }
  .nav a.is-active { color: var(--navy); }
  .nav a.btn-pill {
    display: block; margin: 12px 24px 4px; padding: 15px; text-align: center;
    border-radius: 10px; font-weight: 700;
  }
  .site-header--hero .nav { background: #fff; }
  .site-header--hero .nav a { color: var(--navy); }
  .site-header--hero .nav a.is-active { color: var(--navy); }
  .site-header--hero .nav a.btn-pill { color: #fff !important; }
}
@media (max-width: 560px) {
  .wrap { padding-left: 22px; padding-right: 22px; }
  .grid-4, .timeline, .form-row { grid-template-columns: 1fr; }
}