:root{
  --navy:#16324F;
  --navy-deep:#0F2338;
  --sky:#3E8FBF;
  --paper:#F3F6F8;
  --card:#FFFFFF;
  --ink:#16202B;
  --ink-soft:#65717D;
  --ink-faint:#98A2AD;
  --line:#E3E8EC;
  --danger:#B3432B;
  --radius-card:20px;
}
*{box-sizing:border-box;}
html,body{margin:0;padding:0;}
body{
  font-family:'Inter',system-ui,sans-serif;
  color:var(--ink);
  background:var(--paper);
  -webkit-font-smoothing:antialiased;
}
button{font-family:inherit;}
input,textarea{font-family:inherit;}
.hidden{display:none !important;}

/* On a real phone this fills the screen edge to edge. On a wider
   browser it settles into a phone-width column so it's still easy to
   read while testing on desktop. */
.app-shell{
  position:relative;
  min-height:100dvh;
  max-width:480px;
  margin:0 auto;
  background:var(--paper);
  overflow:hidden;
}
@media (min-width:560px){
  body{background:#EAEDF1;}
  .app-shell{
    min-height:calc(100dvh - 48px);
    margin:24px auto;
    border-radius:28px;
    box-shadow:0 30px 60px -24px rgba(10,15,20,.35);
  }
}

/* ---------- auth screen ---------- */
.auth-screen{
  min-height:100dvh;
  display:flex;align-items:center;justify-content:center;
  padding:24px;
}
.auth-card{
  width:100%;max-width:360px;
  background:var(--card);border-radius:20px;
  padding:32px 26px;
  box-shadow:0 1px 2px rgba(22,32,43,.06),0 8px 24px -14px rgba(22,32,43,.18);
  text-align:center;
}
.auth-card h1{font:700 26px 'Space Grotesk';margin:0 0 8px;}
.auth-copy{font:400 14px 'Inter';color:var(--ink-soft);line-height:1.5;margin:0 0 20px;}
.auth-input{
  width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font:400 15px 'Inter';color:var(--ink);background:#fff;margin-bottom:12px;
  text-align:center;
}
.auth-status{font:500 13px 'Inter';color:var(--ink-soft);min-height:18px;margin:12px 0 0;}
.auth-status.error{color:var(--danger);}

/* ---------- app chrome ---------- */
.app{
  position:relative;
  min-height:100dvh;
  display:flex;flex-direction:column;
  padding-top:env(safe-area-inset-top);
}
.app-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 20px 4px;
  flex-shrink:0;
}
.app-header h1{
  font:700 26px 'Space Grotesk';
  margin:0;
  letter-spacing:-.01em;
}
.header-actions{display:flex;gap:8px;}
.icon-btn{
  width:38px;height:38px;border-radius:50%;
  border:none;background:#fff;
  display:flex;align-items:center;justify-content:center;
  color:var(--navy);
  box-shadow:0 1px 2px rgba(22,32,43,.08);
  cursor:pointer;
  transition:opacity .15s ease, transform .1s ease;
}
.icon-btn:active{transform:scale(.92);}
.icon-btn:disabled{opacity:.32;pointer-events:none;}
.icon-btn svg{width:18px;height:18px;}

.tabs{
  position:relative;
  display:flex;gap:22px;
  padding:14px 20px 0;
  border-bottom:1px solid var(--line);
  flex-shrink:0;
}
.tab{
  background:none;border:none;cursor:pointer;
  font:600 15px 'Inter';color:var(--ink-faint);
  padding:0 2px 12px;
}
.tab.active{color:var(--navy);}
.tab-indicator{
  position:absolute;bottom:-1px;height:2.5px;background:var(--navy);
  border-radius:2px;
  transition:left .22s cubic-bezier(.4,0,.2,1), width .22s cubic-bezier(.4,0,.2,1);
}

.list{
  flex:1;overflow-y:auto;
  padding:18px 18px calc(110px + env(safe-area-inset-bottom));
  display:flex;flex-direction:column;gap:16px;
  -webkit-overflow-scrolling:touch;
}

.empty{
  margin-top:60px;
  text-align:center;
  color:var(--ink-soft);
  font:500 14.5px 'Inter';
  padding:0 30px;
  line-height:1.5;
}

/* ---------- card (collapsed by default; tap the chevron to reveal route/date) ---------- */
.card{position:relative;}
.card-top{
  background:var(--card);
  border-radius:var(--radius-card);
  padding:18px 20px 4px;
  box-shadow:0 1px 2px rgba(22,32,43,.06),0 8px 24px -14px rgba(22,32,43,.18);
  transition:border-radius .1s linear;
}
.card.expanded .card-top{border-radius:var(--radius-card) var(--radius-card) 0 0;}
.countdown{
  font:600 13.5px 'Inter';color:var(--sky);
}
.countdown.past{color:var(--ink-faint);}
.top-divider{border-top:1px solid var(--line);margin:10px 0 12px;}
.leg{display:flex;flex-direction:column;gap:2px;}
.loc{
  font:600 17px 'Space Grotesk';color:var(--ink);
  letter-spacing:-.005em;
}
.loc.linkable{color:var(--navy);cursor:pointer;text-decoration:underline;text-decoration-color:var(--line);text-underline-offset:3px;}
.loc.linkable:active{opacity:.6;}
.leg-note{font:400 13px 'Inter';color:var(--ink-soft);line-height:1.4;}
.route-arrow{
  font:600 14px 'Inter';color:var(--ink-faint);
  padding:6px 0 6px 2px;
}

.chevron-btn{
  display:flex;align-items:center;justify-content:center;
  width:30px;height:30px;border-radius:50%;
  background:none;border:none;padding:0;cursor:pointer;
  color:var(--ink-faint);flex-shrink:0;
}
.chevron-btn svg{width:16px;height:16px;transition:transform .25s ease;}
.chevron-btn svg.flipped{transform:rotate(180deg);}

.card-footer{
  display:flex;align-items:center;justify-content:space-between;
  margin-top:12px;
}
.footer-date{font:500 12px 'Inter';color:var(--ink-soft);}

/* height-animated expand region (CSS grid trick — no JS measuring needed) */
.card-expand-wrap{
  display:grid;grid-template-rows:0fr;
  transition:grid-template-rows .3s cubic-bezier(.4,0,.2,1);
}
.card.expanded .card-expand-wrap{grid-template-rows:1fr;}
.card-expand-inner{overflow:hidden;}

.divider-bar{height:16px;background:var(--navy);}

.expand-body{
  background:var(--card);
  border-radius:0 0 var(--radius-card) var(--radius-card);
  padding:16px 20px 20px;
  box-shadow:0 10px 26px -14px rgba(22,32,43,.22);
}
.stats-row{display:grid;grid-template-columns:1fr auto 1fr;align-items:start;gap:8px;}
.stat-side.right{text-align:right;}
.stat-label{font:500 11.5px 'Inter';color:var(--ink-soft);line-height:1.35;min-height:2.7em;}
.stat-label-detail{color:var(--ink);font-weight:600;}
.stat-value{font:600 19px 'Space Grotesk';color:var(--ink);margin-top:2px;}
.conf-center{text-align:center;padding:0 6px;}
.conf-value{
  font:600 27px 'IBM Plex Mono';letter-spacing:.01em;
  color:var(--navy);cursor:pointer;
  user-select:all;-webkit-user-select:all;
}
.conf-manage-btn{
  margin-top:7px;padding:6px 16px;border-radius:8px;
  background:#EEF1F4;color:var(--navy);border:none;
  font:600 12.5px 'Inter';cursor:pointer;
}
.conf-manage-btn:active{opacity:.7;}

.actions-row{display:flex;gap:10px;margin-top:16px;}
.btn-flat{
  flex:1;text-align:center;padding:12px 8px;border-radius:10px;
  background:#EEF1F4;color:var(--navy);border:none;
  font:600 14.5px 'Inter';cursor:pointer;
  transition:opacity .12s ease;
}
.btn-flat:active{opacity:.7;}

.btn{
  display:block;width:100%;text-align:center;
  padding:13px;border-radius:12px;margin-top:10px;
  font:600 15px 'Inter';border:none;cursor:pointer;
  transition:transform .1s ease, opacity .15s ease;
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--navy);color:#fff;}
.btn-secondary{background:transparent;color:var(--navy);border:1.5px solid #C7D1DA;}

/* ---------- FAB ---------- */
.fab{
  position:absolute;
  right:22px;bottom:calc(28px + env(safe-area-inset-bottom));
  width:58px;height:58px;border-radius:50%;
  background:var(--navy);color:#fff;border:none;
  font:400 30px 'Inter';line-height:1;
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 14px 26px -10px rgba(15,35,56,.55);
  cursor:pointer;z-index:40;
  transition:transform .12s ease;
}
.fab:active{transform:scale(.93);}

/* ---------- sheets & dialogs ---------- */
.backdrop{
  position:fixed;inset:0;background:rgba(14,20,27,.42);
  opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:60;
}
.backdrop.open{opacity:1;pointer-events:auto;}

.page{
  position:fixed;inset:0;background:var(--paper);
  max-width:480px;margin:0 auto;
  display:flex;flex-direction:column;
  transform:translateY(100%);
  transition:transform .28s cubic-bezier(.32,.72,.33,1);
  z-index:70;
}
.page.open{transform:translateY(0);}
.page-header{
  display:flex;align-items:center;justify-content:space-between;
  padding:calc(16px + env(safe-area-inset-top)) 16px 12px;
  border-bottom:1px solid var(--line);
  flex-shrink:0;background:var(--paper);
}
.page-header .txt-btn{
  background:none;border:none;font:600 15px 'Inter';cursor:pointer;padding:6px 4px;
}
.page-header .txt-btn.cancel{color:var(--ink-soft);}
.page-header .txt-btn.save{color:var(--navy);}
.page-header .txt-btn:disabled{opacity:.35;pointer-events:none;}
.page-header h2{font:700 17px 'Space Grotesk';margin:0;}
.page-body{flex:1;overflow-y:auto;padding:16px 18px calc(40px + env(safe-area-inset-bottom));-webkit-overflow-scrolling:touch;}

.paste-intro{font:400 13.5px 'Inter';color:var(--ink-soft);line-height:1.5;margin:0 0 10px;}
textarea.paste-area{
  width:100%;min-height:150px;resize:vertical;
  padding:12px 13px;border:1px solid var(--line);border-radius:12px;
  font:400 13.5px 'IBM Plex Mono';color:var(--ink);background:#fff;
  line-height:1.5;
}
textarea.paste-area:focus,input:focus,textarea:focus{outline:2px solid var(--sky);outline-offset:1px;}

.field{margin-bottom:14px;}
.field label{display:block;font:500 12px 'Inter';color:var(--ink-soft);margin-bottom:5px;}
.field input{
  width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;
  font:400 15px 'Inter';color:var(--ink);background:#fff;
}
.field-row{display:flex;gap:10px;}
.field-row .field{flex:1;}
.section-label{
  font:600 12px 'Inter';color:var(--ink-faint);
  margin:22px 0 10px;
}
.raw-toggle{
  font:500 13px 'Inter';color:var(--navy);background:none;border:none;
  padding:0;cursor:pointer;margin-top:4px;
}
.raw-text{
  margin-top:8px;width:100%;min-height:90px;
  padding:10px 11px;border:1px solid var(--line);border-radius:10px;
  font:400 12px 'IBM Plex Mono';color:var(--ink-soft);background:#F8F9FB;
  resize:vertical;
}

/* trip tools sheet + dialogs */
.sheet{
  position:fixed;left:0;right:0;bottom:0;background:#fff;
  max-width:480px;margin:0 auto;
  border-radius:22px 22px 0 0;
  padding:10px 16px calc(20px + env(safe-area-inset-bottom));
  transform:translateY(100%);
  transition:transform .25s cubic-bezier(.32,.72,.33,1);
  box-shadow:0 -10px 30px rgba(15,25,35,.18);
  z-index:80;
}
.sheet.open{transform:translateY(0);}
.sheet-grabber{width:36px;height:4px;border-radius:3px;background:var(--line);margin:4px auto 14px;}
.sheet h3{font:700 16px 'Space Grotesk';margin:0 0 12px;padding:0 4px;}
.sheet .btn{margin-top:8px;}
.sheet .btn-danger{background:transparent;color:var(--danger);border:1.5px solid #ECD3CB;}
.sheet .btn-plain{background:var(--paper);color:var(--ink);}

.dialog-wrap{
  position:fixed;inset:0;display:flex;align-items:center;justify-content:center;
  padding:0 34px;z-index:90;
  opacity:0;pointer-events:none;transition:opacity .18s ease;
}
.dialog-wrap.open{opacity:1;pointer-events:auto;}
.dialog{
  background:#fff;border-radius:18px;padding:20px 20px 16px;
  width:100%;max-width:340px;box-shadow:0 20px 50px rgba(10,15,20,.3);
}
.dialog p{font:400 14px 'Inter';color:var(--ink);line-height:1.5;margin:0 0 16px;}
.dialog .dlg-actions{display:flex;gap:10px;}
.dialog .dlg-actions .btn{margin-top:0;}

.toast{
  position:fixed;left:50%;bottom:calc(96px + env(safe-area-inset-bottom));
  transform:translate(-50%,10px);
  background:var(--navy-deep);color:#fff;
  font:500 13.5px 'Inter';padding:11px 18px;border-radius:100px;
  opacity:0;pointer-events:none;transition:opacity .2s ease, transform .2s ease;
  z-index:100;white-space:nowrap;
}
.toast.show{opacity:1;transform:translate(-50%,0);}

@media (prefers-reduced-motion: reduce){
  *{transition-duration:.001ms !important;}
}