:root { --bg: #030a1c; --deep: #0b4a8a; --ice: #19d0ff; --frost: #e8fbff; --aurora: #7dffb0; --ease: cubic-bezier(.2, .7, .2, 1); }
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--frost); font-family: "Inter", system-ui, sans-serif; font-size: 1.05rem; line-height: 1.65; overflow-x: hidden; padding-bottom: 8.5rem; }
a { color: inherit; }
:focus-visible { outline: 2px solid var(--ice); outline-offset: 3px; }
h1, h2, h3 { font-family: "Unbounded", sans-serif; margin: 0; text-transform: uppercase; letter-spacing: -.03em; }

.tagfix { position: fixed; right: .8rem; top: 4.4rem; z-index: 95; background: rgba(232, 251, 255, .92); color: var(--bg); font: 500 .72rem/1.3 "Inter", sans-serif; padding: .45rem .85rem; border-radius: 99px; text-decoration: none; max-width: calc(100vw - 1.6rem); }
.tagfix:hover { background: var(--ice); }
.progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; transform-origin: left; transform: scaleX(0); background: linear-gradient(90deg, var(--ice), var(--aurora)); z-index: 100; }

.top { position: fixed; inset: 3px 0 auto 0; z-index: 60; display: flex; justify-content: space-between; align-items: center; padding: 1rem clamp(1.2rem, 4vw, 3rem); background: linear-gradient(var(--bg), transparent); }
.logo { font-family: "Unbounded", sans-serif; font-weight: 900; letter-spacing: .2em; text-decoration: none; }
.top nav { display: flex; gap: 1.6rem; font-size: .9rem; }
.top nav a { text-decoration: none; opacity: .8; transition: opacity .3s, color .3s, text-shadow .3s; }
.top nav a:hover { opacity: 1; color: var(--ice); text-shadow: 0 0 14px var(--ice); }

.hero { position: relative; min-height: 100svh; display: flex; align-items: flex-end; overflow: hidden; background: radial-gradient(80% 90% at 50% 100%, #0b4a8a, var(--bg) 70%); }
.aurora { z-index: 1; mix-blend-mode: screen; opacity: .6; position: absolute; inset: -20% -10% auto -10%; height: 70%; background: conic-gradient(from 200deg at 50% 100%, transparent, rgba(125, 255, 176, .25), rgba(25, 208, 255, .3), transparent 60%); filter: blur(50px); animation: sway 12s ease-in-out infinite alternate; }
@keyframes sway { from { transform: translateX(-4%) skewX(-6deg); } to { transform: translateX(4%) skewX(6deg); } }
.cave { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; will-change: transform; }
.shade { position: absolute; inset: 0; background: linear-gradient(180deg, rgba(3, 10, 28, .55) 0%, rgba(3, 10, 28, .3) 40%, rgba(3, 10, 28, .88) 100%); }
.hero-text { position: relative; z-index: 5; padding: 0 clamp(1.2rem, 6vw, 5rem) clamp(5rem, 10vh, 7rem); }
.eyebrow { letter-spacing: .3em; text-transform: uppercase; font-size: .75rem; color: var(--ice); margin: 0 0 1rem; }
.hero h1 { font-weight: 900; font-size: clamp(3.2rem, 14vw, 12rem); line-height: 1.1; }
.hero h1 > * { padding-top: .12em; }
.l { display: block; overflow: hidden; padding-bottom: .1em; }
.l > span { display: inline-block; transform: translateY(110%); animation: up 1.3s var(--ease) .1s forwards; }
.l:nth-child(2) > span { animation-delay: .3s; }
@keyframes up { to { transform: none; } }
.ice { background: linear-gradient(90deg, #fff, var(--ice) 60%, var(--aurora)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.sub { max-width: 46ch; margin: 1.4rem 0 1.8rem; color: #bfe8f4; }
.cta { display: inline-block; text-decoration: none; font-weight: 500; border: 1px solid var(--ice); color: var(--ice); padding: .8rem 1.6rem; border-radius: 99px; transition: background .3s, color .3s, box-shadow .3s; }
.cta:hover { background: var(--ice); color: var(--bg); box-shadow: 0 0 40px rgba(25, 208, 255, .6); }

.why { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: rgba(25, 208, 255, .2); border-block: 1px solid rgba(25, 208, 255, .2); }
.stat { background: var(--bg); padding: clamp(2.5rem, 7vw, 5rem) clamp(1.2rem, 3vw, 2.5rem); }
.stat b { display: block; font-family: "Unbounded", sans-serif; font-weight: 900; font-size: clamp(3.5rem, 9vw, 7rem); line-height: 1; background: linear-gradient(180deg, #fff, var(--ice)); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat span { color: #9fd3e3; }

.tours { padding: clamp(4rem, 10vw, 8rem) clamp(1.2rem, 5vw, 4rem); }
.tours h2 { font-weight: 900; font-size: clamp(2.4rem, 8vw, 7rem); line-height: 1.1; margin-bottom: 3rem; }
.tour-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.4rem; }
.tour { position: relative; border-radius: 24px; overflow: hidden; background: linear-gradient(180deg, #0a1d3d, #050f26); border: 1px solid rgba(25, 208, 255, .25); transition: transform .5s var(--ease), border-color .4s, box-shadow .5s; }
.tour:hover, .tour.is-picked { transform: translateY(-10px); border-color: var(--ice); box-shadow: 0 0 60px -10px rgba(25, 208, 255, .55); }
.vis { aspect-ratio: 15 / 8; overflow: hidden; }
.vis { background: #0a2a55; }
.vis img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .8s var(--ease); }
.tour:hover .vis img { transform: scale(1.12); }
.tb { padding: 1.4rem 1.5rem 1.6rem; }
.dur { font-size: .75rem; letter-spacing: .2em; text-transform: uppercase; color: var(--ice); }
.tb h3 { font-weight: 700; font-size: 1.5rem; margin: .4rem 0 .6rem; }
.tb p { color: #a9d3e0; margin: 0 0 1.2rem; font-size: .98rem; }
.row { display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.row b { font-family: "Unbounded", sans-serif; font-weight: 700; font-size: 1.2rem; }
.pick { font: 500 .95rem "Inter", sans-serif; color: var(--bg); background: var(--frost); border: 0; padding: .6rem 1.3rem; border-radius: 99px; cursor: pointer; transition: background .3s, transform .3s; }
.pick:hover { background: var(--ice); transform: scale(1.06); }

.quote { padding: clamp(5rem, 12vw, 9rem) 1.5rem; text-align: center; background: radial-gradient(60% 80% at 50% 50%, rgba(25, 208, 255, .22), transparent); }
.quote p { font-family: "Unbounded", sans-serif; font-weight: 300; font-size: clamp(1.6rem, 5vw, 4rem); line-height: 1.15; max-width: 20ch; margin: 0 auto 1rem; letter-spacing: -.03em; }
.quote span { color: #9fd3e3; font-size: .85rem; letter-spacing: .2em; text-transform: uppercase; }
.credits { flex: 1 0 100%; margin: 0; font-size: .78rem; }
.credits a { text-decoration: underline; }
footer { display: flex; justify-content: space-between; flex-wrap: wrap; gap: .5rem; padding: 1.4rem clamp(1.2rem, 5vw, 4rem); font-size: .85rem; color: #8fbccb; border-top: 1px solid rgba(25, 208, 255, .15); }

/* sticky booking bar */
.bar { position: fixed; left: 50%; bottom: .8rem; transform: translateX(-50%); z-index: 80; width: min(960px, calc(100% - 1.4rem)); display: flex; flex-wrap: wrap; gap: .7rem; align-items: end; padding: .8rem 1rem; border-radius: 22px; background: rgba(8, 24, 52, .78); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px); border: 1px solid rgba(25, 208, 255, .4); box-shadow: 0 10px 50px rgba(0, 0, 0, .5); }
.bar label { display: grid; gap: .15rem; font-size: .68rem; letter-spacing: .15em; text-transform: uppercase; color: #9fd3e3; flex: 1 1 120px; }
.bar select, .bar input { font: 400 .95rem "Inter", sans-serif; background: rgba(232, 251, 255, .08); color: var(--frost); border: 1px solid rgba(232, 251, 255, .25); border-radius: 10px; padding: .55rem .7rem; width: 100%; color-scheme: dark; letter-spacing: 0; text-transform: none; }
.bar select option { color: #000; }
.bar button { font: 700 .95rem "Inter", sans-serif; background: linear-gradient(90deg, var(--ice), var(--aurora)); color: var(--bg); border: 0; border-radius: 12px; padding: .7rem 1.8rem; cursor: pointer; flex: 0 0 auto; transition: filter .3s, transform .3s; }
.bar button:hover { filter: brightness(1.15); transform: translateY(-2px); }
#out { flex: 1 1 100%; font-size: .85rem; color: var(--aurora); min-height: 0; }
#out:empty { display: none; }

.js .rv { opacity: 0; transform: translateY(46px); transition: opacity 1s var(--ease), transform 1s var(--ease); transition-delay: var(--d, 0s); }
.js .rv.in { opacity: 1; transform: none; }

@media (max-width: 860px) {
  .tour-grid, .why { grid-template-columns: 1fr; }
  .top nav a:not(:last-child) { display: none; }
  body { padding-bottom: 12rem; }
  .bar label { flex: 1 1 40%; }
  .bar button { flex: 1 1 100%; }
  .tagfix { top: 4rem; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation: none !important; transition: none !important; }
  .l > span { transform: none; }
  .js .rv { opacity: 1; transform: none; }
}