:root{
  --bg:#0f1720;
  --bg-accent:linear-gradient(180deg,#0b1220 0%, #101827 100%);
  --glass: rgba(255,255,255,0.06);
  --glass-strong: rgba(255,255,255,0.08);
  --panel-text:#e6eef8;
  --muted: #9fb0c8;
  --accent:#4ade80;
  --accent-dark:#22c55e;
  --radius:14px;
  --shadow: 0 8px 30px rgba(2,6,23,0.6);
  --transition:200ms cubic-bezier(.2,.8,.2,1);
}
[data-theme="light"] {
  --bg:#f3f6f9;
  --bg-accent:linear-gradient(180deg,#f8fafc 0%, #eef2f6 100%);
  --glass: rgba(10,25,40,0.03);
  --glass-strong: rgba(10,25,40,0.06);
  --panel-text:#0b1320;
  --muted:#4b6b83;
  --accent:#16a34a;
  --accent-dark:#13803d;
  --shadow: 0 10px 30px rgba(16,24,40,0.08);
}

*{box-sizing:border-box}
html,body{
  height:100%;
  margin:0;
  font-family: "Roboto", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: var(--bg-accent);
  color:var(--panel-text);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:28px;
}

.container {
  width:100%;
  max-width:980px;
  display:grid;
  gap:28px;
}

.card {
  background: var(--glass);
  backdrop-filter: blur(8px) saturate(120%);
  border-radius: var(--radius);
  padding:20px;
  box-shadow: var(--shadow);
  display:flex;
  flex-direction:column;
  gap:12px;
  min-width:320px;
}

.form-row{ display:flex; flex-direction:column; gap:8px; }

label { font-size:13px; color:var(--muted); }
input[type="date"], select {
  appearance:none;
  padding:12px 14px;
  border-radius:10px;
  border:1px solid rgba(255,255,255,0.04);
  background: linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.01));
  color:var(--panel-text);
  font-size:15px;
  transition: box-shadow var(--transition), transform var(--transition);
}
input[type="date"]:focus, select:focus {
  outline:none;
  box-shadow: 0 6px 20px rgba(16,24,40,0.15);
  transform: translateY(-1px);
}

.button {
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:10px;
  padding:12px 16px;
  border-radius:12px;
  background: linear-gradient(180deg,var(--accent),var(--accent-dark));
  color:#fff;
  font-weight:600;
  border:none;
  cursor:pointer;
  transition: transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 8px 20px rgba(34,197,94,0.12);
}
.button:active{ transform: translateY(1px); }
.button[disabled]{ opacity:0.6; cursor:not-allowed; transform:none; box-shadow:none; }

.result {
  display: none;
  margin-top:8px;
  padding:12px;
  border-radius:10px;
  background:var(--glass-strong);
  color:var(--panel-text);
  font-size:15px;
  min-height:48px;
  display:flex;
  align-items:center;
  gap:10px;
}

.theme-toggle { position: fixed; top: 18px; right: 18px; z-index:1200; display:flex; gap:8px; align-items:center; }
.theme-btn{
  width:44px; height:28px; border-radius:16px; border:none; padding:4px;
  display:inline-flex; align-items:center; justify-content:center;
  background: linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01));
  cursor:pointer; transition:transform .15s ease, background .15s ease;
}
.theme-btn:active{ transform: translateY(1px); }
.theme-btn svg { width:20px; height:20px; display:block; }

@media (max-width:920px){
  .container{ grid-template-columns: 1fr; }
  .photos{ grid-template-columns: repeat(2,1fr); }
  .hero{ order:2; }
  .card{ order:1; width:100%; }
}