*{box-sizing:border-box;}
html,body{height:100%;}
body{
  margin:0; background:var(--bg); color:var(--ink);
  font-family:-apple-system,BlinkMacSystemFont,"Inter","Segoe UI",sans-serif;
  font-variant-numeric:tabular-nums;
  -webkit-font-smoothing:antialiased;
  padding-top:env(safe-area-inset-top,0px);
  padding-bottom:env(safe-area-inset-bottom,0px);
}

a{color:inherit;}

.topbar{
  display:flex; align-items:center; justify-content:space-between;
  padding:14px 24px; border-bottom:1px solid var(--border); background:var(--surface);
  position:sticky; top:0; z-index:20;
  padding-top:calc(14px + env(safe-area-inset-top,0px));
}
.mark{display:flex; align-items:center; gap:8px;}
.mark .app-icon{width:19px; height:19px; color:var(--accent); flex-shrink:0; display:inline-flex;}
.mark .app-icon svg{width:100%; height:100%;}
.mark span{font-weight:600; font-size:15px; letter-spacing:0.01em;}
.who{display:flex; align-items:center; gap:14px; font-size:13px; color:var(--ink-soft);}
.who a{text-decoration:none; border-bottom:1px solid var(--border-strong);}
.who a:hover{color:var(--ink);}

/* Buttons */
.btn{
  padding:9px 14px; border-radius:var(--radius); font-size:14px; font-weight:500;
  font-family:inherit; cursor:pointer; border:1px solid var(--border); background:var(--surface); color:var(--ink);
  white-space:nowrap;
}
.btn:hover{border-color:var(--border-strong); background:var(--surface-alt);}
.btn-primary{background:var(--accent); border-color:var(--accent); color:#fff; font-weight:600;}
.btn-primary:hover{background:var(--accent-dark); border-color:var(--accent-dark);}
.btn:disabled{opacity:0.5; cursor:not-allowed;}

input:focus, select:focus, textarea:focus, button:focus-visible{
  outline:2px solid var(--accent); outline-offset:1px;
}

/* Dark mode toggle */
.theme-toggle{
  width:32px; height:32px; border-radius:50%; border:1px solid var(--border); background:var(--surface);
  display:flex; align-items:center; justify-content:center; cursor:pointer; color:var(--ink-soft); padding:0;
  flex-shrink:0;
}
.theme-toggle:hover{color:var(--ink); border-color:var(--border-strong);}
.theme-toggle svg{width:16px; height:16px;}
.theme-toggle .icon-moon{display:none;}
:root[data-theme="dark"] .theme-toggle .icon-sun{display:none;}
:root[data-theme="dark"] .theme-toggle .icon-moon{display:block;}
@media (prefers-color-scheme: dark){
  :root:not([data-theme="light"]) .theme-toggle .icon-sun{display:none;}
  :root:not([data-theme="light"]) .theme-toggle .icon-moon{display:block;}
}

/* Cards (login / import) */
.center-page{
  min-height:100%; display:flex; align-items:center; justify-content:center; padding:24px;
  position:relative;
}
.center-page .theme-toggle{position:absolute; top:20px; right:20px;}
.card{
  width:100%; max-width:420px; background:var(--surface);
  border:1px solid var(--border); border-radius:var(--radius-lg); padding:36px 32px;
}
.card h1{font-size:20px; font-weight:600; margin:0 0 6px;}
.card p.sub{color:var(--ink-soft); font-size:14px; margin:0 0 24px; line-height:1.5;}

.field{margin-bottom:14px;}
.field label{display:block; font-size:13px; font-weight:500; color:var(--ink-soft); margin-bottom:6px;}
.field input[type="text"], .field input[type="password"], .field textarea{
  width:100%; padding:10px 12px; border:1px solid var(--border); border-radius:var(--radius);
  font-size:15px; font-family:inherit; background:var(--surface); color:var(--ink);
}
.field textarea{resize:vertical; min-height:70px;}

.error-box{
  background:var(--danger-bg); color:var(--danger); border-radius:var(--radius); padding:10px 12px;
  font-size:13px; margin-bottom:16px;
}
.warning-box{
  background:var(--danger-bg); color:var(--danger); border-radius:var(--radius); padding:12px 14px;
  font-size:13.5px; margin-bottom:18px; line-height:1.5;
}

/* Modal */
.overlay{
  position:fixed; inset:0; background:var(--overlay); display:none;
  align-items:flex-start; justify-content:center; padding:8vh 16px; z-index:100; overflow-y:auto;
}
.overlay.open{display:flex;}
.modal{
  background:var(--surface); border-radius:var(--radius-lg); width:100%; max-width:440px; padding:26px 26px 22px;
  border:1px solid var(--border);
}
.modal h2{margin:0 0 18px; font-size:17px; font-weight:600;}
.modal-actions{display:flex; justify-content:flex-end; gap:8px; margin-top:20px;}

/* Toast */
#toast{
  position:fixed; bottom:20px; left:50%; transform:translateX(-50%) translateY(10px);
  background:var(--toast-bg); color:var(--toast-ink); padding:10px 16px; border-radius:6px; font-size:13.5px;
  opacity:0; pointer-events:none; transition:opacity .15s, transform .15s; z-index:200; max-width:90vw;
}
#toast.show{opacity:1; transform:translateX(-50%) translateY(0);}
#toast.err{background:var(--danger);}