/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-hover: #1d4ed8;
  --danger: #dc2626;
  --danger-hover: #b91c1c;
  --secondary: #6b7280;
  --secondary-hover: #4b5563;
  --success: #16a34a;
  --bg: #f8fafc;
  --surface: #ffffff;
  --border: #e2e8f0;
  --text: #1e293b;
  --text-muted: #64748b;
  --radius: 8px;
  --shadow: 0 1px 3px rgba(0,0,0,.1), 0 1px 2px rgba(0,0,0,.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.5;
  min-height: 100vh;
}

/* Layout */
.container { max-width: 1100px; margin: 0 auto; padding: 0 1rem; }

/* Navbar */
.navbar {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: .75rem 0;
  box-shadow: var(--shadow);
  position: sticky; top: 0; z-index: 100;
}
.navbar-inner {
  display: flex; align-items: center; justify-content: space-between;
  max-width: 1100px; margin: 0 auto; padding: 0 1rem;
}
.navbar-brand { font-size: 1.25rem; font-weight: 700; color: var(--primary); text-decoration: none; }
.navbar-user { display: flex; align-items: center; gap: .75rem; font-size: .9rem; color: var(--text-muted); }

/* Login page */
.login-wrapper {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh; padding: 1rem;
}
.login-card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow-md);
  padding: 2.5rem; width: 100%; max-width: 420px;
}
.login-card h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: .25rem; }
.login-card .subtitle { color: var(--text-muted); margin-bottom: 1.75rem; font-size: .9rem; }

/* Forms */
.form-group { margin-bottom: 1.1rem; }
label { display: block; font-size: .875rem; font-weight: 500; margin-bottom: .35rem; }
input[type="text"], input[type="password"], input[type="date"], input[type="email"] {
  width: 100%; padding: .6rem .8rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .95rem; background: var(--surface); color: var(--text);
  transition: border-color .15s;
  outline: none;
}
input:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  padding: .55rem 1.1rem; border: none; border-radius: var(--radius);
  font-size: .875rem; font-weight: 500; cursor: pointer;
  transition: background .15s, transform .1s; text-decoration: none;
}
.btn:active { transform: scale(.98); }
.btn:disabled { opacity: .6; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-hover); }
.btn-danger  { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled)  { background: var(--danger-hover); }
.btn-secondary { background: var(--secondary); color: #fff; }
.btn-secondary:hover:not(:disabled) { background: var(--secondary-hover); }
.btn-outline { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline:hover { background: rgba(37,99,235,.07); }
.btn-full { width: 100%; }
.btn-sm { padding: .35rem .7rem; font-size: .8rem; }

/* Cards */
.card {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); box-shadow: var(--shadow);
  padding: 1.5rem; margin-bottom: 1.5rem;
}
.card-title { font-size: 1.1rem; font-weight: 600; margin-bottom: 1rem; }

/* Tables */
.table-wrapper { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: .9rem; }
thead { background: var(--bg); }
th { text-align: left; padding: .65rem 1rem; font-weight: 600; font-size: .8rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); border-bottom: 1px solid var(--border); }
td { padding: .7rem 1rem; border-bottom: 1px solid var(--border); vertical-align: middle; }
tr:last-child td { border-bottom: none; }
tr:hover { background: var(--bg); }
.empty-state { text-align: center; color: var(--text-muted); padding: 2rem !important; }
.actions { display: flex; gap: .4rem; align-items: center; white-space: nowrap; }

/* Error / Status */
.error-msg { color: var(--danger); font-size: .875rem; margin-top: .5rem; min-height: 1.2em; }
.status-msg { font-size: .875rem; padding: .5rem .75rem; border-radius: var(--radius); margin-bottom: 1rem; }
.status-success { background: #dcfce7; color: #166534; }
.status-error { background: #fee2e2; color: #991b1b; }

/* Badges */
.badge {
  display: inline-block; padding: .2rem .5rem; border-radius: 4px;
  font-size: .75rem; font-weight: 500;
  background: #e2e8f0; color: #475569;
}
.badge-admin { background: #dbeafe; color: #1e40af; }
.badge-blocked { background: #fee2e2; color: #991b1b; }
.badge-ok { background: #dcfce7; color: #166534; }
.badge-otp { background: #fef3c7; color: #92400e; }

/* WebSocket status */
.ws-status {
  display: inline-flex; align-items: center; gap: .4rem;
  font-size: .8rem; font-weight: 500; padding: .25rem .6rem;
  border-radius: 999px;
}
.ws-status::before { content: ''; display: block; width: 8px; height: 8px; border-radius: 50%; }
.ws-connected { background: #dcfce7; color: #166534; }
.ws-connected::before { background: #16a34a; }
.ws-disconnected { background: #fee2e2; color: #991b1b; }
.ws-disconnected::before { background: #dc2626; }
.ws-error { background: #fef3c7; color: #92400e; }
.ws-error::before { background: #d97706; }

/* Session count */
.session-count-badge {
  background: var(--primary); color: #fff;
  padding: .1rem .5rem; border-radius: 999px; font-size: .8rem; font-weight: 600;
}
.session-id { font-size: .78rem; color: var(--text-muted); }

/* Main content spacing */
.main { padding: 2rem 0; }
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 1.5rem;
}
.page-header h1 { font-size: 1.4rem; font-weight: 700; }

/* Grid layout for dashboard */
.grid-2 { display: grid; grid-template-columns: 1fr 2fr; gap: 1.5rem; }
@media (max-width: 768px) { .grid-2 { grid-template-columns: 1fr; } }

/* Admin header row */
.admin-header-row {
  display: flex; align-items: center; gap: 1rem; margin-bottom: 1rem; flex-wrap: wrap;
}

/* Search bar */
.search-bar { margin-bottom: 1rem; }
.search-bar input[type="text"] {
  width: 100%; padding: .55rem .8rem;
  border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .9rem; background: var(--surface); color: var(--text);
  outline: none; transition: border-color .15s;
}
.search-bar input[type="text"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }

/* Pagination bar */
.pagination-bar {
  display: flex; align-items: center; justify-content: center; gap: .75rem;
  padding: .75rem 0; margin-top: .5rem;
}
.page-info { font-size: .85rem; color: var(--text-muted); min-width: 140px; text-align: center; }

/* Date input group */
.date-input-group {
  display: flex; align-items: center; gap: .25rem;
}
.date-input-group input[type="number"] {
  padding: .6rem .5rem; border: 1px solid var(--border); border-radius: var(--radius);
  font-size: .95rem; background: var(--surface); color: var(--text);
  outline: none; transition: border-color .15s; text-align: center;
  -moz-appearance: textfield;
}
.date-input-group input[type="number"]::-webkit-inner-spin-button,
.date-input-group input[type="number"]::-webkit-outer-spin-button {
  -webkit-appearance: none; margin: 0;
}
.date-input-group input[type="number"]:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }
.date-input-group input#birthYear { width: 5.5rem; }
.date-input-group input#birthMonth,
.date-input-group input#birthDay { width: 3.5rem; }
.date-sep { color: var(--text-muted); font-weight: 500; }

/* Language selector */
.lang-select {
  padding: .3rem .5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--surface);
  color: var(--text);
  font-size: .8rem;
  cursor: pointer;
  outline: none;
}
.lang-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,.15); }

.login-card-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: .25rem;
}
.login-card-title h1 { margin-bottom: 0; }