/* ============ WalkBG design system ============ */
:root {
  --sky: #1e9be9;
  --sky-light: #5bb8f0;
  --sky-dark: #1077c0;
  --navy: #0e1726;
  --navy-soft: #16243a;
  --sun: #f5a623;
  --ink: #131a24;
  --muted: #5d6b7a;
  --bg: #f6f9fc;
  --card: #ffffff;
  --line: #e4ebf2;
  --ok: #1faa59;

  --maxw: 1140px;
  --radius: 16px;
  --shadow: 0 10px 30px -12px rgba(14, 23, 38, 0.25);
  --font-display: 'Oswald', system-ui, sans-serif;
  --font-body: 'Inter', system-ui, -apple-system, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
h1, h2, h3, .display {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: 0.5px;
  margin: 0 0 0.4em;
}
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); text-transform: uppercase; }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1rem; }
a { color: var(--sky-dark); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; display: block; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.section { padding: clamp(3rem, 8vw, 6rem) 0; }
.section--dark { background: var(--navy); color: #eaf1f8; }
.section--dark h2 { color: #fff; }
.section--dark p { color: #b9c6d6; }

.eyebrow {
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 3px;
  font-size: 0.8rem;
  color: var(--sky);
  font-weight: 600;
  margin-bottom: 0.6rem;
}
.lead { font-size: 1.15rem; color: var(--muted); max-width: 60ch; }

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: 1px;
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.85rem 1.6rem;
  border-radius: 999px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s;
}
.btn:hover { text-decoration: none; transform: translateY(-2px); }
.btn--primary { background: var(--sky); color: #fff; box-shadow: 0 8px 20px -8px var(--sky); }
.btn--primary:hover { background: var(--sky-dark); }
.btn--ghost { border-color: rgba(255, 255, 255, 0.4); color: #fff; }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.1); }
.btn--dark { background: var(--navy); color: #fff; }

.grid { display: grid; gap: 1.5rem; }
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.72rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  padding: 0.2rem 0.6rem;
  border-radius: 999px;
  background: rgba(30, 155, 233, 0.12);
  color: var(--sky-dark);
}
.muted { color: var(--muted); }
.center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
@media (max-width: 640px) { .section { padding: 2.5rem 0; } }

/* ============ Header ============ */
.hdr {
  position: sticky; top: 0; z-index: 1000;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.hdr__inner { display: flex; align-items: center; gap: 1.5rem; height: 64px; }
.hdr__brand {
  font-family: var(--font-display); font-weight: 700; text-transform: uppercase;
  letter-spacing: 1px; color: var(--ink); display: flex; align-items: center; gap: 0.5rem;
}
.hdr__brand:hover { text-decoration: none; }
.hdr__dot { width: 12px; height: 12px; border-radius: 50%; background: var(--sky); box-shadow: 0 0 0 4px rgba(30, 155, 233, 0.2); }
.hdr__nav { display: flex; gap: 1.4rem; margin-left: auto; }
.hdr__nav a { color: var(--muted); font-weight: 500; font-size: 0.95rem; }
.hdr__nav a:hover { color: var(--ink); text-decoration: none; }
.hdr__cta { padding: 0.55rem 1.1rem; font-size: 0.85rem; }
@media (max-width: 880px) { .hdr__nav { display: none; } .hdr__cta { margin-left: auto; } }

/* ============ Hero ============ */
.hero { position: relative; color: #fff; overflow: hidden; background: linear-gradient(160deg, #1e9be9 0%, #1077c0 55%, #0e3a63 100%); }
.hero__bg {
  position: absolute; inset: 0;
  background:
    radial-gradient(1200px 400px at 80% -10%, rgba(255, 255, 255, 0.25), transparent 60%),
    url('https://images.unsplash.com/photo-1502920917128-1aa500764cbd?w=1600&q=70') center/cover;
  opacity: 0.28; mix-blend-mode: overlay;
}
.hero__inner { position: relative; padding: clamp(4rem, 12vh, 8rem) 0 clamp(3rem, 8vh, 5rem); }
.hero__eyebrow { font-family: var(--font-display); text-transform: uppercase; letter-spacing: 3px; font-size: 0.85rem; opacity: 0.9; }
.hero__title { font-size: clamp(2.6rem, 8vw, 5.5rem); text-transform: uppercase; max-width: 16ch; text-shadow: 0 4px 30px rgba(0, 0, 0, 0.25); }
.hero__sub { font-size: clamp(1.1rem, 2.5vw, 1.5rem); max-width: 40ch; color: #eaf4fd; }
.hero__cta { display: flex; gap: 1rem; flex-wrap: wrap; margin: 2rem 0 2.5rem; }
.hero__stats { display: flex; gap: 2.5rem; flex-wrap: wrap; padding-top: 1.5rem; border-top: 1px solid rgba(255, 255, 255, 0.25); }
.hero__stat { display: flex; flex-direction: column; }
.hero__num { font-family: var(--font-display); font-size: 2rem; font-weight: 700; }
.hero__lbl { font-size: 0.85rem; opacity: 0.85; text-transform: uppercase; letter-spacing: 1px; }

/* ============ About ============ */
.about { display: grid; grid-template-columns: 1fr 1fr; gap: 3rem; }
.about__list { list-style: none; padding: 0; margin: 1rem 0 0; }
.about__list li { position: relative; padding-left: 1.8rem; margin-bottom: 0.6rem; font-weight: 500; }
.about__list li::before { content: '➤'; position: absolute; left: 0; color: var(--sky); }
@media (max-width: 760px) { .about { grid-template-columns: 1fr; gap: 2rem; } }

/* ============ Stats ============ */
.stats__highlights { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2.5rem 0 3rem; }
.stats__hl { background: var(--navy-soft); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius); padding: 1.6rem; }
.stats__big { display: block; font-family: var(--font-display); font-size: 1.9rem; color: var(--sky-light); font-weight: 700; margin-bottom: 0.4rem; }
.stats__cap { color: #9fb1c4; font-size: 0.95rem; }
.stats__grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 1.5rem; }
.stats__panel { background: var(--navy-soft); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius); padding: 1.8rem; }
.stats__panel h3 { color: #fff; margin-bottom: 1.2rem; }
.bar { display: flex; align-items: center; gap: 0.8rem; margin-bottom: 0.7rem; }
.bar__label { width: 70px; font-size: 0.85rem; color: #b9c6d6; }
.bar__track { flex: 1; height: 12px; background: rgba(255, 255, 255, 0.08); border-radius: 999px; overflow: hidden; }
.bar__fill { height: 100%; border-radius: 999px; background: linear-gradient(90deg, var(--sky), var(--sky-light)); }
.bar__val { width: 48px; text-align: right; font-weight: 600; font-size: 0.85rem; }
.gender__bar { display: flex; height: 56px; border-radius: 12px; overflow: hidden; margin-bottom: 1.2rem; font-family: var(--font-display); font-weight: 600; }
.gender__male, .gender__female { display: flex; align-items: center; justify-content: center; color: #fff; }
.gender__male { background: linear-gradient(90deg, var(--sky-dark), var(--sky)); }
.gender__female { background: linear-gradient(90deg, var(--sun), #f7b94d); }
@media (max-width: 820px) { .stats__highlights { grid-template-columns: 1fr; } .stats__grid { grid-template-columns: 1fr; } }

/* ============ Previous projects ============ */
.proj { grid-template-columns: 1fr 1fr; }
.proj__card { display: flex; flex-direction: column; }
.proj__img { height: 220px; background-size: cover; background-position: center; position: relative; }
.proj__tag { position: absolute; top: 1rem; left: 1rem; background: #fff; }
.proj__body { padding: 1.6rem; flex: 1; display: flex; flex-direction: column; }
.proj__stat { margin-top: auto; font-family: var(--font-display); font-weight: 700; color: var(--sky-dark); text-transform: uppercase; letter-spacing: 0.5px; }
@media (max-width: 720px) { .proj { grid-template-columns: 1fr; } }

/* ============ Sponsors ============ */
.spons__head { max-width: 60ch; }
.spons__perks { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.5rem; margin: 2.5rem 0; }
.spons__perk { background: var(--navy-soft); border: 1px solid rgba(255, 255, 255, 0.08); border-radius: var(--radius); padding: 1.6rem; }
.spons__icon { font-size: 2rem; display: block; margin-bottom: 0.6rem; }
.spons__perk h3 { color: #fff; }
.spons__logorow { display: flex; flex-wrap: wrap; gap: 2rem; align-items: center; justify-content: center; margin-top: 1rem; }
.spons__logorow img { height: 48px; filter: grayscale(1) brightness(2); opacity: 0.85; }
.spons__cta { margin-top: 2.5rem; padding: 1.8rem; display: flex; align-items: center; justify-content: space-between; gap: 1.5rem; flex-wrap: wrap; color: var(--ink); }
@media (max-width: 820px) { .spons__perks { grid-template-columns: 1fr; } }

/* ============ Footer ============ */
.ftr { background: var(--navy); color: #cdd9e6; padding: 3rem 0 1.5rem; }
.ftr__inner { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: space-between; align-items: center; padding-bottom: 2rem; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.ftr__brand { font-family: var(--font-display); font-weight: 700; text-transform: uppercase; letter-spacing: 1px; color: #fff; font-size: 1.2rem; }
.ftr__tag { margin: 0.3rem 0 0; color: #8ba0b6; }
.ftr__social { display: flex; gap: 1.4rem; }
.ftr__social a { color: #cdd9e6; font-weight: 500; }
.ftr__legal { padding-top: 1.5rem; font-size: 0.85rem; }

/* ============ Live tracker ============ */
.tracker {
  display: grid; grid-template-columns: 1.6fr 1fr; gap: 1.5rem;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); overflow: hidden;
}
.tracker__map { min-height: 460px; height: 100%; width: 100%; z-index: 1; }
.tracker__panel { padding: 1.8rem; display: flex; flex-direction: column; gap: 1.2rem; }
.tracker__live { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-display); font-weight: 600; letter-spacing: 2px; color: #d12; font-size: 0.85rem; }
.tracker__dot { width: 10px; height: 10px; border-radius: 50%; background: #d12; box-shadow: 0 0 0 0 rgba(221, 17, 34, 0.5); animation: pulse 1.8s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(221, 17, 34, 0.5); } 70% { box-shadow: 0 0 0 12px rgba(221, 17, 34, 0); } 100% { box-shadow: 0 0 0 0 rgba(221, 17, 34, 0); } }
.tracker__bar { height: 12px; background: var(--line); border-radius: 999px; overflow: hidden; }
.tracker__fill { height: 100%; background: linear-gradient(90deg, var(--sky), var(--sky-light)); border-radius: 999px; transition: width 0.6s ease; }
.tracker__nums { display: flex; align-items: baseline; gap: 0.5rem; margin-top: 0.5rem; font-family: var(--font-display); font-weight: 700; font-size: 1.3rem; }
.tracker__pct { margin-left: auto; color: var(--sky-dark); }
.tracker__now { border-top: 1px solid var(--line); padding-top: 1rem; }
.tracker__day { font-family: var(--font-display); font-weight: 700; text-transform: uppercase; color: var(--sky-dark); margin: 0 0 0.3rem; }
.tracker__note { font-size: 1.05rem; margin: 0 0 0.3rem; }
.tracker__time { font-size: 0.85rem; margin: 0; }
.tracker__route { list-style: none; margin: auto 0 0; padding: 1rem 0 0; border-top: 1px solid var(--line); display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tracker__route li { font-size: 0.8rem; color: var(--muted); background: var(--bg); border: 1px solid var(--line); padding: 0.25rem 0.6rem; border-radius: 999px; }
.walkbg-pin { position: relative; }
.walkbg-pin__dot { position: absolute; inset: 0; display: flex; align-items: center; justify-content: center; font-size: 18px; }
.walkbg-pin__pulse { position: absolute; left: 50%; top: 50%; width: 28px; height: 28px; margin: -14px 0 0 -14px; border-radius: 50%; background: rgba(30, 155, 233, 0.4); animation: pulse-pin 1.8s infinite; }
@keyframes pulse-pin { 0% { transform: scale(0.6); opacity: 0.8; } 100% { transform: scale(2.2); opacity: 0; } }
@media (max-width: 820px) { .tracker { grid-template-columns: 1fr; } .tracker__map { min-height: 320px; } }

/* ============ Social feed ============ */
.sf__filters { display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 1.8rem; }
.sf__filter { font-family: var(--font-display); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; font-size: 0.82rem; padding: 0.5rem 1.1rem; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--muted); cursor: pointer; transition: all 0.15s; }
.sf__filter:hover { color: var(--ink); border-color: var(--sky-light); }
.sf__filter.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }
.sf__grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); gap: 1.5rem; }
.sf-card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); color: var(--ink); transition: transform 0.18s ease, box-shadow 0.18s ease; }
.sf-card:hover { transform: translateY(-4px); text-decoration: none; box-shadow: 0 18px 40px -16px rgba(14,23,38,.35); }
.sf-card__img { position: relative; aspect-ratio: 16 / 10; background-size: cover; background-position: center; }
.sf-card__text { position: relative; aspect-ratio: 16 / 6; background: linear-gradient(135deg, var(--navy), var(--navy-soft)); }
.sf-card__play { position: absolute; inset: 0; margin: auto; width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: rgba(0,0,0,0.55); color: #fff; border-radius: 50%; font-size: 1.3rem; }
.sf-card__badge { position: absolute; top: 0.7rem; left: 0.7rem; color: #fff; font-size: 0.72rem; font-weight: 600; padding: 0.25rem 0.6rem; border-radius: 999px; letter-spacing: 0.3px; }
.sf-card__badge--inline { position: static; display: inline-block; margin: 1rem; }
.sf-card__body { padding: 1.1rem 1.2rem 1.2rem; display: flex; flex-direction: column; gap: 0.4rem; flex: 1; }
.sf-card__title { font-weight: 700; margin: 0; line-height: 1.3; }
.sf-card__summary { color: var(--muted); font-size: 0.92rem; margin: 0; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.sf-card__foot { margin-top: auto; padding-top: 0.6rem; display: flex; justify-content: space-between; align-items: center; font-size: 0.82rem; border-top: 1px solid var(--line); }
.sf-card__metrics { display: flex; gap: 0.8rem; font-weight: 600; }
.sf-empty { text-align: center; color: var(--muted); }

/* ============ Demo banner + error ============ */
.demo-banner { background: #fff8e6; border-bottom: 1px solid #f3e3b3; color: #8a6d18; text-align: center; font-size: 0.9rem; padding: 0.6rem 1rem; }
.demo-banner code { background: #f3e3b3; padding: 0.1rem 0.4rem; border-radius: 4px; }
.errpage { max-width: 600px; margin: 6rem auto; text-align: center; padding: 0 20px; }
.errpage h1 { font-size: 4rem; color: var(--sky-dark); }