:root {
  --bg: #eef2f4;
  --surface: #ffffff;
  --ink: #1a2330;
  --muted: #5c6b7a;
  --line: #d7e0e8;
  --accent: #c8102e;
  --accent-2: #e11d3a;
  --danger: #b42318;
  --warning: #b54708;
  --info: #175cd3;
  --success: #067647;
  --sidebar: #0a0a0a;
  --sidebar-text: #d0d0d0;
  --radius: 12px;
  --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  --font: "Segoe UI", "Trebuchet MS", sans-serif;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  min-height: 100vh;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

/* Login */
.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  background:
    radial-gradient(circle at 15% 20%, rgba(200, 16, 46, 0.28), transparent 40%),
    radial-gradient(circle at 85% 80%, rgba(37, 99, 180, 0.22), transparent 45%),
    linear-gradient(160deg, #0a0a0a 0%, #1a1a1a 45%, #eef2f4 45%);
}
.login-card {
  width: 100%;
  max-width: 420px;
  background: var(--surface);
  border-radius: 18px;
  padding: 36px 32px;
  box-shadow: var(--shadow);
}
.login-brand {
  background: #000;
  border-radius: 14px;
  padding: 18px 20px;
  margin: 0 0 18px;
  text-align: center;
}
.login-brand img {
  display: block;
  width: 100%;
  max-width: 280px;
  height: auto;
  margin: 0 auto;
}
.login-card h1 {
  margin: 0 0 6px;
  font-size: 1.8rem;
  letter-spacing: -0.02em;
}
.login-card .subtitle {
  margin: 0 0 28px;
  color: var(--muted);
  text-align: center;
}
.login-meta {
  margin-top: 18px;
  font-size: 0.85rem;
  color: var(--muted);
  background: #f5f5f5;
  border-radius: 8px;
  padding: 12px;
}
.login-download {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px solid #e5e5e5;
}
.login-download .login-meta {
  margin-top: 10px;
  text-align: center;
  background: transparent;
  padding: 0;
}

/* App shell */
.app-body { display: flex; min-height: 100vh; }
.sidebar {
  width: 250px;
  background: linear-gradient(180deg, #0a0a0a, #141414);
  color: var(--sidebar-text);
  padding: 22px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
  flex-shrink: 0;
}
.brand {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 0 4px 4px;
}
.brand-logo {
  display: block;
  width: 100%;
  max-width: 210px;
  height: auto;
  border-radius: 10px;
  background: #000;
}
.brand-panel {
  color: #9a9a9a;
  font-size: 0.8rem;
  padding-left: 4px;
}
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--accent-2); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.brand strong { display: block; color: #fff; }
.brand small { color: #9a9a9a; }
.sidebar nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar nav a {
  color: var(--sidebar-text);
  padding: 11px 14px;
  border-radius: 10px;
  text-decoration: none;
}
.sidebar nav a:hover,
.sidebar nav a.active {
  background: rgba(255,255,255,0.1);
  color: #fff;
  text-decoration: none;
}
.sidebar-quota {
  background: rgba(255,255,255,0.08);
  border-radius: 12px;
  padding: 14px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.sidebar-quota span { font-size: 0.85rem; color: #9a9a9a; }
.sidebar-quota strong { font-size: 1.4rem; color: #fff; }

.main { flex: 1; display: flex; flex-direction: column; min-width: 0; }
.topbar {
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  padding: 18px 28px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.topbar h1 { margin: 0; font-size: 1.35rem; }
.topbar-user { color: var(--muted); font-size: 0.95rem; }
.content { padding: 24px 28px 40px; }

/* Components */
.grid { display: grid; gap: 16px; }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 1100px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 760px) {
  .app-body { flex-direction: column; }
  .sidebar { width: 100%; }
  .grid-4, .grid-2 { grid-template-columns: 1fr; }
  .content, .topbar { padding-left: 16px; padding-right: 16px; }
}

.stat-card, .panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.stat-card { padding: 18px 20px; }
.stat-card .label { color: var(--muted); font-size: 0.9rem; }
.stat-card .value { font-size: 1.8rem; font-weight: 700; margin-top: 6px; letter-spacing: -0.03em; }

.panel { padding: 20px 22px; margin-top: 16px; }
.panel h2 { margin: 0 0 16px; font-size: 1.1rem; }
.panel-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; gap: 12px; flex-wrap: wrap;
}
.panel-header h2 { margin: 0; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 0.92rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
@media (max-width: 700px) { .form-row { grid-template-columns: 1fr; } }

input[type="text"], input[type="email"], input[type="password"],
input[type="number"], input[type="file"], select, textarea {
  width: 100%;
  padding: 11px 12px;
  border: 1px solid var(--line);
  border-radius: 10px;
  font: inherit;
  background: #fff;
  color: var(--ink);
}
textarea { min-height: 120px; resize: vertical; }
input:focus, select:focus, textarea:focus {
  outline: none;
  border-color: var(--accent-2);
  box-shadow: 0 0 0 3px rgba(26, 143, 122, 0.15);
}

.btn {
  display: inline-block;
  border: none;
  border-radius: 10px;
  padding: 10px 16px;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  background: var(--accent);
  color: #fff;
}
.btn:hover { background: var(--accent-2); text-decoration: none; color: #fff; }
.btn-secondary { background: #334155; }
.btn-secondary:hover { background: #475569; }
.btn-danger { background: var(--danger); }
.btn-warning { background: var(--warning); }
.btn-sm { padding: 7px 11px; font-size: 0.85rem; }
.btn-block { width: 100%; text-align: center; }

.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td {
  text-align: left;
  padding: 11px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 0.94rem;
  vertical-align: top;
}
th { color: var(--muted); font-weight: 600; font-size: 0.82rem; text-transform: uppercase; letter-spacing: 0.04em; }
tr:hover td { background: #f8fbfa; }

.badge {
  display: inline-block;
  padding: 4px 9px;
  border-radius: 999px;
  font-size: 0.78rem;
  font-weight: 600;
  background: #e8eef3;
  color: #334155;
}
.badge-success { background: #dcfae6; color: var(--success); }
.badge-danger { background: #fee4e2; color: var(--danger); }
.badge-warning { background: #fef0c7; color: var(--warning); }
.badge-info { background: #d1e9ff; color: var(--info); }

.alert {
  padding: 12px 14px;
  border-radius: 10px;
  margin-bottom: 14px;
  font-size: 0.95rem;
}
.alert-success { background: #dcfae6; color: var(--success); }
.alert-error { background: #fee4e2; color: var(--danger); }
.alert-info { background: #d1e9ff; color: var(--info); }

.help { color: var(--muted); font-size: 0.88rem; margin-top: 6px; }
.actions { display: flex; gap: 8px; flex-wrap: wrap; }
.muted { color: var(--muted); }
.mono { font-family: Consolas, monospace; font-size: 0.88rem; word-break: break-all; }
.empty { padding: 24px; text-align: center; color: var(--muted); }

.sms-meter {
  margin-top: 8px;
  padding: 10px 12px;
  border-radius: 10px;
  background: #f7f7f8;
  border: 1px solid #e2e5e9;
  font-size: 0.9rem;
  font-weight: 600;
}
.sms-meter-unicode {
  background: #fff7ed;
  border-color: #f5d0a9;
}
.sms-meter .help { font-weight: 400; margin-top: 6px; }

.filter-bar {
  margin-top: 4px;
  padding-top: 4px;
}
.filter-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}
@media (max-width: 1100px) {
  .filter-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
  .filter-grid { grid-template-columns: 1fr; }
}
.filter-bar .form-group { margin-bottom: 0; }
.filter-bar label {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--muted);
  font-weight: 600;
}