*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --bg:#0e0f11;--surface:#16181c;--surface2:#1e2028;--border:#2a2d38;
  --accent:#e8d5a3;--accent2:#c9a96e;--danger:#e07070;--warn:#e0b870;--ok:#7ec8a0;
  --text:#e8e6e0;--muted:#8b8e9b;
  --font-display:'DM Serif Display',Georgia,serif;
  --font-body:'DM Sans',system-ui,-apple-system,'PingFang SC','Microsoft YaHei',sans-serif;
  --font-mono:'DM Mono',ui-monospace,monospace;
}
html{font-size:16px;scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font-body);font-weight:300;min-height:100vh;
  background-image:radial-gradient(ellipse 60% 50% at 80% 10%,rgba(232,213,163,.05) 0%,transparent 60%),
  radial-gradient(ellipse 40% 30% at 10% 80%,rgba(201,169,110,.04) 0%,transparent 50%)}
a{color:var(--accent2)}

/* HEADER */
header{border-bottom:1px solid var(--border);padding:14px 36px;display:flex;align-items:center;gap:14px;
  position:sticky;top:0;background:rgba(14,15,17,.94);backdrop-filter:blur(12px);z-index:200;flex-wrap:wrap}
.brand{font-family:var(--font-display);font-size:1.25rem;color:var(--accent);text-decoration:none}
.subtitle{font-size:.68rem;color:var(--muted);font-family:var(--font-mono);letter-spacing:.08em;text-transform:uppercase}
.header-right{margin-left:auto;display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.lang-switcher{display:flex;gap:4px}
.lang-btn{border:1px solid var(--border);border-radius:6px;color:var(--muted);text-decoration:none;
  font-family:var(--font-mono);font-size:.68rem;padding:5px 9px;transition:all .15s;letter-spacing:.05em}
.lang-btn:hover,.lang-btn.active{border-color:var(--accent2);color:var(--accent);background:var(--surface2)}

/* SECTION NAV */
.section-nav{display:flex;border-bottom:1px solid var(--border);background:var(--surface);overflow-x:auto}
.section-nav a{color:var(--muted);font-size:.82rem;padding:13px 20px;text-decoration:none;white-space:nowrap;
  border-bottom:2px solid transparent;transition:color .15s}
.section-nav a:hover{color:var(--accent);border-bottom-color:var(--accent2)}

/* LAYOUT */
.page-wrap{display:flex;gap:22px;max-width:1080px;margin:0 auto;padding:24px 22px 80px}
.main-col{flex:1;min-width:0}
.side-col{width:290px;flex-shrink:0}
@media(max-width:880px){.side-col{display:none}}
@media(max-width:580px){header{padding:12px 16px}.page-wrap{padding:16px 16px 60px}.section-nav a{padding:12px 14px}}

/* HERO */
.hero{margin-bottom:18px}
.hero h1{font-family:var(--font-display);font-weight:400;font-size:1.9rem;line-height:1.2;color:var(--accent);margin-bottom:8px}
.hero p{font-size:.92rem;color:var(--muted);line-height:1.65;max-width:62ch}
@media(max-width:580px){.hero h1{font-size:1.5rem}}

/* CARD */
.card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:22px;margin-bottom:14px;scroll-margin-top:80px}
.card-title{font-family:var(--font-mono);font-size:.66rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:16px}
.card h2{font-family:var(--font-display);font-weight:400;font-size:1.35rem;color:var(--accent);margin-bottom:14px}
.card .card-title{font-family:var(--font-mono);font-size:.66rem;font-weight:400;color:var(--muted);margin-bottom:16px}
.card h3{font-size:.95rem;font-weight:500;color:var(--text);margin:18px 0 6px}
.prose p,.prose li{font-size:.88rem;color:var(--muted);line-height:1.75}
.prose p+p{margin-top:10px}
.prose ul,.prose ol{padding-left:20px;margin-top:6px}
.prose strong{color:var(--text);font-weight:500}

/* RING */
.result-block{display:flex;align-items:center;gap:26px}
@media(max-width:480px){.result-block{flex-direction:column;align-items:stretch;gap:14px}.ring-wrap{align-self:center}}
.ring-wrap{position:relative;flex-shrink:0}
.ring-svg{transform:rotate(-90deg)}
.ring-track{fill:none;stroke:var(--border);stroke-width:8}
.ring-fill{fill:none;stroke-width:8;stroke-linecap:round;transition:stroke-dashoffset .8s cubic-bezier(.4,0,.2,1),stroke .4s}
.ring-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring-days{font-family:var(--font-display);font-size:2.5rem;line-height:1}
.ring-label{font-family:var(--font-mono);font-size:.57rem;letter-spacing:.1em;text-transform:uppercase;color:var(--muted);margin-top:2px}
.result-stats{flex:1}
.stat-row{display:flex;justify-content:space-between;align-items:baseline;gap:10px;padding:8px 0;border-bottom:1px solid var(--border)}
.stat-row:last-child{border-bottom:none}
.stat-label{font-size:.78rem;color:var(--muted)}
.stat-value{font-family:var(--font-mono);font-size:.88rem;font-weight:500;text-align:right}
.alert{border-radius:8px;padding:11px 15px;font-size:.81rem;line-height:1.5;display:none;margin-top:12px}
.alert.show{display:block}
.alert-ok{background:rgba(126,200,160,.1);border:1px solid rgba(126,200,160,.25);color:var(--ok)}
.alert-warn{background:rgba(224,184,112,.1);border:1px solid rgba(224,184,112,.25);color:var(--warn)}
.alert-danger{background:rgba(224,112,112,.1);border:1px solid rgba(224,112,112,.25);color:var(--danger)}

/* TRIPS */
.trips-header{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:12px;flex-wrap:wrap}
.btn{background:none;border:1px solid var(--border);border-radius:8px;color:var(--text);
  font-family:var(--font-body);font-size:.8rem;padding:7px 13px;cursor:pointer;transition:background .15s,border-color .15s}
.btn:hover{background:var(--surface2);border-color:var(--accent2)}
.btn:disabled{opacity:.4;cursor:default}
.btn-accent{background:var(--accent);border-color:var(--accent);color:#111;font-weight:500}
.btn-accent:hover{background:var(--accent2);border-color:var(--accent2)}
.btn-sm{font-size:.74rem;padding:6px 11px}
.trips-list{display:flex;flex-direction:column;gap:9px}
.trip-row{display:grid;grid-template-columns:1fr 1fr auto auto;gap:9px;align-items:end;
  background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:11px 13px;
  animation:slideIn .2s ease}
@keyframes slideIn{from{opacity:0;transform:translateY(-5px)}to{opacity:1;transform:translateY(0)}}
.trip-row label{font-size:.67rem;color:var(--muted);font-family:var(--font-mono);letter-spacing:.08em;display:block;margin-bottom:4px}
input[type="date"]{background:var(--surface);border:1px solid var(--border);border-radius:6px;
  color:var(--text);font-family:var(--font-mono);font-size:.78rem;padding:6px 9px;width:100%;
  outline:none;cursor:pointer;color-scheme:dark;transition:border-color .15s}
input[type="date"]:focus{border-color:var(--accent2)}
.trip-days-badge{font-family:var(--font-mono);font-size:.7rem;background:var(--surface);border:1px solid var(--border);
  border-radius:6px;padding:6px 9px;text-align:center;min-width:48px;white-space:nowrap}
.remove-btn{background:none;border:none;color:var(--muted);cursor:pointer;font-size:1.1rem;
  padding:5px 4px;transition:color .15s;line-height:1}
.remove-btn:hover{color:var(--danger)}
.trip-row.future{border-style:dashed}
.trip-row.overlap{border-color:rgba(224,184,112,.5)}
.trip-row.over{border-color:rgba(224,112,112,.5);background:rgba(224,112,112,.06)}
.trip-msg{grid-column:1/-1;font-size:.7rem;font-family:var(--font-mono);padding:2px;letter-spacing:.02em}
.trip-msg.warn{color:var(--warn)}.trip-msg.danger{color:var(--danger)}.trip-msg.muted{color:var(--muted)}
@media(max-width:480px){.trip-row{grid-template-columns:1fr 1fr}.trip-days-badge{justify-self:start}.remove-btn{justify-self:end}}

/* TIMELINE */
.timeline{position:relative;height:32px;border-radius:6px;overflow:hidden;background:var(--surface2);margin-top:4px}
.timeline-bar{position:absolute;height:100%;border-radius:4px;transition:all .4s cubic-bezier(.4,0,.2,1);
  display:flex;align-items:center;justify-content:center;font-size:.6rem;font-family:var(--font-mono);overflow:hidden}
.timeline-bar-label{white-space:nowrap;padding:0 5px;color:rgba(0,0,0,.7);font-weight:500}
.timeline-axis{display:flex;justify-content:space-between;font-family:var(--font-mono);font-size:.62rem;color:var(--muted);margin-top:6px}
.timeline-legend{display:flex;gap:12px;margin-top:8px;flex-wrap:wrap}
.legend-item{display:flex;align-items:center;gap:5px;font-size:.69rem;color:var(--muted)}
.legend-dot{width:9px;height:9px;border-radius:2px;flex-shrink:0}

/* PROJECTION */
.proj-row{display:flex;align-items:center;gap:9px;margin-bottom:11px;flex-wrap:wrap}
.proj-row label{font-size:.79rem;color:var(--muted);white-space:nowrap}
.proj-row input[type="date"]{width:auto;background:var(--surface2)}
.proj-result{font-family:var(--font-mono);font-size:.8rem;padding:13px 15px;background:var(--surface2);
  border:1px solid var(--border);border-radius:8px;line-height:1.7;display:none}
.proj-result.show{display:block}

/* SHARE */
.share-box{display:flex;gap:9px;align-items:center;flex-wrap:wrap}
.share-url{flex:1;min-width:0;background:var(--surface2);border:1px solid var(--border);border-radius:8px;
  padding:9px 13px;font-family:var(--font-mono);font-size:.72rem;color:var(--muted);
  word-break:break-all;min-height:40px;display:flex;align-items:center}
.copy-toast{font-family:var(--font-mono);font-size:.73rem;color:var(--ok);opacity:0;transition:opacity .3s}
.small-note{font-size:.8rem;color:var(--muted);margin-bottom:12px;line-height:1.6}

/* INFO */
.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px}
@media(max-width:480px){.info-grid{grid-template-columns:1fr}}
.info-item{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:15px}
.info-item .num{font-family:var(--font-display);font-size:1.8rem;color:var(--accent);line-height:1}
.info-item .desc{font-size:.76rem;color:var(--muted);margin-top:5px;line-height:1.5}

/* COUNTRIES */
.countries-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:11px;margin-top:16px;padding:0;list-style:none}
@media(max-width:600px){.countries-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:360px){.countries-grid{grid-template-columns:1fr}}
.country-card{background:var(--surface2);border:1px solid var(--border);border-radius:8px;
  padding:13px;display:flex;align-items:center;gap:11px;transition:border-color .15s}
.country-card:hover{border-color:var(--accent2)}
.flag{font-size:1.5rem;line-height:1}
.cname{font-size:.85rem;font-weight:500;color:var(--text)}
.cnote{font-size:.68rem;color:var(--muted);margin-top:2px}

/* FAQ */
.faq-item{border:1px solid var(--border);border-radius:8px;margin-bottom:8px;overflow:hidden}
.faq-item summary{background:var(--surface2);padding:13px 16px;font-size:.88rem;cursor:pointer;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:'▾';font-size:.7rem;color:var(--muted);transition:transform .3s}
.faq-item[open] summary::after{transform:rotate(180deg)}
.faq-item summary:hover{background:var(--surface)}
.faq-item h3{font-size:inherit;font-weight:400;margin:0;color:inherit}
.faq-a{background:var(--surface);padding:13px 16px;font-size:.84rem;color:var(--muted);line-height:1.75}

/* BREADCRUMB & GUIDE LINKS */
.breadcrumb{font-family:var(--font-mono);font-size:.7rem;color:var(--muted);margin-bottom:10px;letter-spacing:.04em}
.breadcrumb a{text-decoration:none}
.guide-links{list-style:none;display:flex;flex-direction:column;gap:9px}
.guide-links li{background:var(--surface2);border:1px solid var(--border);border-radius:8px;padding:13px 15px;transition:border-color .15s}
.guide-links li:hover{border-color:var(--accent2)}
.guide-links a{font-weight:500;text-decoration:none;display:block}
.guide-links span{font-size:.78rem;color:var(--muted);display:block;margin-top:3px}

/* EMPTY */
.empty-state{text-align:center;padding:32px 18px;color:var(--muted);font-size:.81rem}
.empty-state .big{font-size:1.9rem;margin-bottom:9px}

/* SIDEBAR */
.side-sticky{position:sticky;top:80px;display:flex;flex-direction:column;gap:14px}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:10px;padding:16px}
.side-card-title{font-family:var(--font-mono);font-size:.6rem;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);margin-bottom:11px}
.qf{display:flex;justify-content:space-between;gap:10px;font-size:.78rem;padding:6px 0;border-bottom:1px solid var(--border)}
.qf:last-child{border-bottom:none}
.qf-val{font-family:var(--font-mono);font-size:.76rem;color:var(--accent);text-align:right}

footer{max-width:1080px;margin:0 auto;padding:18px 22px 48px;font-size:.72rem;
  color:var(--muted);line-height:1.7;border-top:1px solid var(--border)}
footer a{text-decoration:none}
footer p+p{margin-top:8px}

[data-tip]{position:relative;cursor:help}
[data-tip]::after{content:attr(data-tip);position:absolute;bottom:calc(100% + 8px);left:0;
  background:#2a2d38;border:1px solid var(--border);border-radius:6px;
  padding:5px 9px;font-size:.68rem;width:max-content;max-width:240px;white-space:normal;pointer-events:none;opacity:0;
  transition:opacity .15s;z-index:50;font-family:var(--font-body);font-weight:300;color:var(--text)}
[data-tip]:hover::after{opacity:1}