/* Hospital Management System (Vanilla JS + LocalStorage) */
:root{
  --bg: #f6f8fc;
  --surface: #ffffff;
  --surface-2: #f0f4ff;
  --text: #0f172a;
  --muted: #64748b;
  --border: rgba(15,23,42,.12);
  --shadow: 0 10px 30px rgba(2,6,23,.08);

  --primary: #1d4ed8;      /* hospital blue */
  --primary-2: #2563eb;
  --accent: #0ea5e9;       /* sky */
  --good: #16a34a;
  --warn: #f59e0b;
  --bad: #dc2626;

  --radius: 14px;
  --radius-sm: 10px;
  --ring: 0 0 0 4px rgba(37,99,235,.18);
}

html, body { height: 100%; }
body{
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Liberation Sans", sans-serif;
  background: radial-gradient(1200px 600px at 15% -10%, rgba(14,165,233,.15), transparent 60%),
              radial-gradient(1000px 500px at 95% 0%, rgba(29,78,216,.14), transparent 55%),
              var(--bg);
  color: var(--text);
}

/* Dark mode */
body.theme-dark{
  --bg: #0b1220;
  --surface: rgba(15,23,42,.92);
  --surface-2: rgba(30,41,59,.65);
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: rgba(226,232,240,.14);
  --shadow: 0 18px 45px rgba(0,0,0,.38);

  --primary: #60a5fa;
  --primary-2: #3b82f6;
  --accent: #38bdf8;
  background: radial-gradient(1200px 600px at 15% -10%, rgba(56,189,248,.18), transparent 60%),
              radial-gradient(1000px 500px at 95% 0%, rgba(96,165,250,.14), transparent 55%),
              var(--bg);
}

*{ box-sizing: border-box; }
a{ color: inherit; text-decoration: none; }

.container{
  width: min(1160px, 92vw);
  margin: 0 auto;
}

.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: blur(14px);
  background: color-mix(in srgb, var(--surface) 80%, transparent);
  border-bottom: 1px solid var(--border);
}
.topbar-inner{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  padding: 14px 0;
}
.brand{
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: .2px;
}
.brand-badge{
  width: 34px;
  height: 34px;
  border-radius: 12px;
  background: linear-gradient(145deg, var(--primary), var(--accent));
  box-shadow: 0 10px 18px rgba(29,78,216,.25);
}
.top-actions{ display: flex; gap: 10px; align-items: center; }

.btn{
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  cursor: pointer;
  transition: transform .12s ease, background .12s ease, border-color .12s ease;
}
.btn:hover{ transform: translateY(-1px); border-color: color-mix(in srgb, var(--primary) 35%, var(--border)); }
.btn:active{ transform: translateY(0px); }
.btn-primary{
  background: linear-gradient(145deg, var(--primary), var(--primary-2));
  color: #fff;
  border-color: transparent;
}
.btn-danger{
  background: color-mix(in srgb, var(--bad) 10%, var(--surface));
  border-color: color-mix(in srgb, var(--bad) 40%, var(--border));
}
.btn-ghost{
  background: transparent;
}
.btn:focus{ outline: none; box-shadow: var(--ring); }
.btn[disabled]{ opacity: .55; cursor: not-allowed; transform: none; }
.btn-sm{ padding: 8px 10px; border-radius: 10px; font-size: 14px; }

.pill{
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--muted);
}
.status{
  font-weight: 700;
  color: var(--text);
}
.status.booked{ color: color-mix(in srgb, var(--primary) 80%, var(--text)); }
.status.completed{ color: var(--good); }
.status.cancelled{ color: var(--bad); }

.auth-wrap{
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 20px;
  padding: 28px 0 46px;
}
.auth-hero{
  background: linear-gradient(145deg, color-mix(in srgb, var(--primary) 9%, var(--surface)),
                                     color-mix(in srgb, var(--accent) 7%, var(--surface)));
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px;
  box-shadow: var(--shadow);
  overflow: hidden;
  position: relative;
}
.auth-hero h1{ margin: 0 0 10px; font-size: 30px; }
.auth-hero p{ margin: 0; color: var(--muted); line-height: 1.55; }
.auth-card{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.card-title{ display:flex; align-items:center; justify-content:space-between; gap:10px; margin-bottom: 12px; }
.card-title h2{ margin: 0; font-size: 18px; }

.grid-2{ display:grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.grid-3{ display:grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }

.field{ display:flex; flex-direction:column; gap: 6px; }
label{ font-size: 13px; color: var(--muted); }
input, select, textarea{
  width: 100%;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text);
  padding: 10px 12px;
  border-radius: 12px;
  outline: none;
  transition: box-shadow .12s ease, border-color .12s ease;
}
textarea{ min-height: 92px; resize: vertical; }
input:focus, select:focus, textarea:focus{ box-shadow: var(--ring); border-color: color-mix(in srgb, var(--primary) 55%, var(--border)); }
.help{ font-size: 12px; color: var(--muted); }
.error{
  background: color-mix(in srgb, var(--bad) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--bad) 40%, var(--border));
  padding: 10px 12px;
  border-radius: 12px;
  color: color-mix(in srgb, var(--bad) 75%, var(--text));
  font-size: 14px;
}
.success{
  background: color-mix(in srgb, var(--good) 10%, var(--surface));
  border: 1px solid color-mix(in srgb, var(--good) 35%, var(--border));
  padding: 10px 12px;
  border-radius: 12px;
  color: color-mix(in srgb, var(--good) 70%, var(--text));
  font-size: 14px;
}

/* Dashboard layout */
.dashboard{
  display: grid;
  grid-template-columns: 270px 1fr;
  gap: 16px;
  padding: 18px 0 36px;
}
.sidebar{
  position: sticky;
  top: 76px;
  align-self: start;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.sidebar-head{
  padding: 14px 14px 10px;
  border-bottom: 1px solid var(--border);
}
.who{
  display: flex; flex-direction: column;
  gap: 6px;
}
.who strong{ font-size: 14px; }
.nav{
  display:flex;
  flex-direction:column;
  padding: 10px;
  gap: 8px;
}
.nav a{
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  color: var(--muted);
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.nav a:hover{
  background: var(--surface-2);
  border-color: var(--border);
  color: var(--text);
}
.nav a.active{
  background: color-mix(in srgb, var(--primary) 10%, var(--surface));
  border-color: color-mix(in srgb, var(--primary) 25%, var(--border));
  color: var(--text);
}

.content{
  display: flex;
  flex-direction: column;
  gap: 14px;
}
.panel{
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  box-shadow: var(--shadow);
}
.panel h3{ margin: 0 0 10px; font-size: 16px; }
.cards{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}
.stat{
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 14px;
  background: linear-gradient(145deg, var(--surface), color-mix(in srgb, var(--primary) 6%, var(--surface)));
}
.stat .k{ font-size: 13px; color: var(--muted); }
.stat .v{ font-size: 26px; font-weight: 900; margin-top: 6px; }

.table{
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 12px;
  border: 1px solid var(--border);
}
.table th, .table td{
  padding: 10px 10px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: top;
  font-size: 14px;
}
.table th{
  font-size: 12px;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
  background: var(--surface-2);
}
.table tr:hover td{ background: color-mix(in srgb, var(--primary) 5%, var(--surface)); }
.table td.actions{ white-space: nowrap; }

.row{ display:flex; gap: 10px; align-items: center; flex-wrap: wrap; }
.spacer{ flex: 1; }
.muted{ color: var(--muted); }
.section{ display:none; }
.section.active{ display:block; animation: fadein .18s ease-out; }
@keyframes fadein{ from{ opacity:0; transform: translateY(4px); } to{ opacity:1; transform: translateY(0);} }

.chip{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 6px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  font-size: 13px;
}
.chip.good{ background: color-mix(in srgb, var(--good) 10%, var(--surface)); border-color: color-mix(in srgb, var(--good) 35%, var(--border)); }
.chip.warn{ background: color-mix(in srgb, var(--warn) 12%, var(--surface)); border-color: color-mix(in srgb, var(--warn) 35%, var(--border)); }
.chip.bad{ background: color-mix(in srgb, var(--bad) 10%, var(--surface)); border-color: color-mix(in srgb, var(--bad) 35%, var(--border)); }

/* Responsive */
@media (max-width: 980px){
  .auth-wrap{ grid-template-columns: 1fr; }
  .dashboard{ grid-template-columns: 1fr; }
  .sidebar{ position: static; top: auto; }
  .cards{ grid-template-columns: 1fr; }
}

@media (max-width: 640px){
  .grid-2, .grid-3{ grid-template-columns: 1fr; }
  .topbar-inner{ padding: 12px 0; }
  .brand{ font-size: 14px; }
  .btn{ padding: 10px 10px; }
  .table{ display: block; overflow-x: auto; }
}