/* --- GB SMS Design System - Dark Theme --- */
:root {
  --primary: #7e22ce;
  --primary-light: #a855f7;
  --primary-glow: rgba(168, 85, 247, 0.15);
  --secondary: #1e293b;
  --text-light: #f8fafc;
  --text-muted: #94a3b8;
  --danger: #ef4444;
  --success: #22c55e;
  --warning: #f59e0b;
  --info: #3b82f6;
  --panel: #1e293b;
  --panel-border: rgba(255, 255, 255, 0.06);
  --background: #0f172a;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: 'Inter', 'Segoe UI', sans-serif; }
body { background-color: var(--background); color: var(--text-light); min-height: 100vh; }

/* === LOGIN === */
.login-wrapper {
  min-height: 100vh; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, #0f172a 0%, #1a1035 50%, #0f172a 100%);
  padding: 20px;
}
.login-box {
  background: var(--panel); border: 1px solid var(--panel-border);
  border-radius: 16px; padding: 40px; width: 100%; max-width: 420px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}
.login-box .brand {
  text-align: center; margin-bottom: 30px;
}
.login-box .brand h1 {
  font-size: 28px; color: var(--primary-light); display: flex;
  align-items: center; justify-content: center; gap: 10px;
}
.login-box .brand p { color: var(--text-muted); font-size: 14px; margin-top: 8px; }

/* === NAVIGATION === */
.main-nav {
  background: linear-gradient(135deg, #1a1035 0%, var(--background) 100%);
  border-bottom: 1px solid var(--panel-border);
  position: sticky; top: 0; z-index: 1000;
  backdrop-filter: blur(12px);
}
.main-nav .nav-inner {
  max-width: 1400px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between; height: 60px;
}
.main-nav .brand {
  display: flex; align-items: center; gap: 10px; text-decoration: none;
  color: var(--primary-light); font-weight: 700; font-size: 20px;
}
.main-nav .nav-links { display: flex; align-items: center; gap: 4px; list-style: none; }
.main-nav .nav-links a {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px;
  border-radius: 8px; color: var(--text-muted); text-decoration: none;
  font-size: 14px; font-weight: 500; transition: all 0.2s; white-space: nowrap; cursor: pointer;
}
.main-nav .nav-links a:hover { color: var(--text-light); background: rgba(255,255,255,0.06); }
.main-nav .nav-links a.active { color: var(--primary-light); background: var(--primary-glow); }
.nav-user-info { display: flex; align-items: center; gap: 12px; }
.nav-balance {
  background: rgba(34,197,94,0.15); color: var(--success); padding: 6px 14px;
  border-radius: 50px; font-size: 13px; font-weight: 600;
  display: flex; align-items: center; gap: 6px;
}
.nav-username {
  color: var(--text-muted); font-size: 13px;
  display: flex; align-items: center; gap: 6px;
}
.nav-toggle {
  display: none; background: none; border: none; color: var(--text-light);
  font-size: 22px; cursor: pointer; padding: 8px;
}
@media (max-width: 768px) {
  .nav-toggle { display: block; }
  .main-nav .nav-links {
    display: none; position: absolute; top: 60px; left: 0; right: 0;
    background: var(--panel); border-bottom: 1px solid var(--panel-border);
    padding: 10px; flex-direction: column; gap: 2px;
  }
  .main-nav .nav-links.open { display: flex; }
  .main-nav .nav-links a { width: 100%; padding: 12px 16px; }
  .nav-user-info { flex-wrap: wrap; justify-content: center; gap: 8px; }
}

/* === LAYOUT === */
.container { width: 100%; max-width: 1400px; margin: 0 auto; padding: 20px; }
.page-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px; flex-wrap: wrap; gap: 10px;
}
.page-title { font-size: 22px; font-weight: 700; color: var(--primary-light); display: flex; align-items: center; gap: 10px; }

/* === GRID === */
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.span-2 { grid-column: span 2; }
.span-3 { grid-column: span 3; }
@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .span-2, .span-3 { grid-column: span 1; }
}

/* === PANEL === */
.panel {
  background: var(--panel); border-radius: 12px; padding: 20px;
  box-shadow: var(--shadow); border: 1px solid var(--panel-border);
}
.panel-header { display: flex; align-items: center; margin-bottom: 16px; gap: 10px; }
.panel-title { font-size: 16px; font-weight: 600; }
.icon { color: var(--primary-light); font-size: 18px; }

/* === STATS CARD === */
.stat-card {
  background: rgba(0,0,0,0.2); border-radius: 10px; padding: 16px; text-align: center;
  border: 1px solid var(--panel-border);
}
.stat-value { font-size: 26px; font-weight: 700; margin: 6px 0; }
.stat-label { font-size: 13px; color: var(--text-muted); }

/* === FORMS === */
.input-group { margin-bottom: 14px; }
.input-label { display: block; margin-bottom: 6px; font-weight: 500; font-size: 14px; }
.input, .select-input {
  width: 100%; padding: 11px 14px; border-radius: 8px;
  border: 1px solid rgba(255,255,255,0.1);
  background: rgba(0,0,0,0.2); color: var(--text-light);
  font-size: 14px; transition: all 0.2s;
}
.input:focus, .select-input:focus { outline: none; border-color: var(--primary-light); }
textarea.input { min-height: 100px; resize: vertical; }

/* === BUTTONS === */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 10px 20px; border-radius: 8px; font-weight: 600; font-size: 14px;
  cursor: pointer; transition: all 0.2s; border: none; text-decoration: none;
}
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--primary-light); }
.btn-secondary { background: rgba(255,255,255,0.1); color: var(--text-light); }
.btn-secondary:hover:not(:disabled) { background: rgba(255,255,255,0.15); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover:not(:disabled) { opacity: 0.85; }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover:not(:disabled) { opacity: 0.85; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-block { width: 100%; }

/* === TABLE === */
.table-wrapper { overflow-x: auto; border-radius: 8px; background: rgba(0,0,0,0.15); }
table.data-table { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data-table th, table.data-table td {
  padding: 10px 12px; text-align: left;
  border-bottom: 1px solid rgba(255,255,255,0.06); white-space: nowrap;
}
table.data-table th {
  background: rgba(0,0,0,0.3); color: var(--primary-light);
  font-weight: 600; position: sticky; top: 0;
}
table.data-table tr:hover { background: rgba(255,255,255,0.03); }

/* === BADGES === */
.badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 50px; font-size: 12px; font-weight: 600;
}
.badge-success { background: rgba(34,197,94,0.2); color: var(--success); }
.badge-danger { background: rgba(239,68,68,0.2); color: var(--danger); }
.badge-warning { background: rgba(245,158,11,0.2); color: var(--warning); }
.badge-info { background: rgba(59,130,246,0.2); color: var(--info); }
.badge-primary { background: var(--primary-glow); color: var(--primary-light); }

/* === FILE UPLOAD === */
.file-upload { position: relative; width: 100%; margin-bottom: 16px; }
.file-upload-label {
  display: flex; align-items: center; justify-content: center; gap: 10px;
  background: rgba(255,255,255,0.05); border: 1px dashed rgba(255,255,255,0.2);
  border-radius: 8px; padding: 28px; cursor: pointer; transition: all 0.2s; text-align: center;
}
.file-upload-label:hover { background: rgba(255,255,255,0.1); }
.file-upload input[type="file"] { position: absolute; width: 0; height: 0; opacity: 0; }

/* === LOGS === */
.logs-container {
  max-height: 350px; overflow-y: auto; background: rgba(0,0,0,0.2);
  border-radius: 8px; padding: 12px; border: 1px solid rgba(255,255,255,0.06);
}
.log-item {
  padding: 8px; border-bottom: 1px solid rgba(255,255,255,0.04);
  display: flex; align-items: flex-start; gap: 8px; font-size: 13px;
}
.log-item:last-child { border-bottom: none; }

/* === PROGRESS === */
.progress-bar { width: 100%; height: 6px; background: rgba(255,255,255,0.1); border-radius: 3px; overflow: hidden; margin-top: 10px; }
.progress-fill { height: 100%; background: var(--primary); width: 0%; transition: width 0.3s; }

/* === ALERT === */
.alert { padding: 12px 16px; border-radius: 8px; display: flex; align-items: center; gap: 10px; margin-bottom: 14px; font-size: 14px; }
.alert-info { background: rgba(59,130,246,0.1); border-left: 3px solid var(--info); }
.alert-warning { background: rgba(245,158,11,0.1); border-left: 3px solid var(--warning); }
.alert-danger { background: rgba(239,68,68,0.1); border-left: 3px solid var(--danger); }
.alert-success { background: rgba(34,197,94,0.1); border-left: 3px solid var(--success); }

/* === MODAL === */
.modal-overlay {
  display: none; position: fixed; z-index: 2000; inset: 0;
  background: rgba(0,0,0,0.7); align-items: center; justify-content: center; padding: 20px;
}
.modal-overlay.active { display: flex; }
.modal {
  background: var(--panel); width: 100%; max-width: 520px;
  border-radius: 14px; box-shadow: 0 10px 40px rgba(0,0,0,0.4);
  animation: modalIn 0.25s ease; display: flex; flex-direction: column; max-height: 90vh;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(-16px); } to { opacity: 1; transform: translateY(0); } }
.modal-header {
  padding: 16px 20px; display: flex; justify-content: space-between; align-items: center;
  border-bottom: 1px solid var(--panel-border);
}
.modal-header h3 { font-size: 17px; display: flex; align-items: center; gap: 8px; }
.modal-close { color: var(--text-muted); font-size: 22px; cursor: pointer; background: none; border: none; transition: color 0.2s; }
.modal-close:hover { color: var(--primary-light); }
.modal-body { padding: 20px; overflow-y: auto; flex: 1; }
.modal-footer { padding: 12px 20px; display: flex; justify-content: flex-end; gap: 10px; border-top: 1px solid var(--panel-border); }

/* === TABS === */
.tabs { display: flex; gap: 2px; border-bottom: 1px solid var(--panel-border); margin-bottom: 20px; }
.tab-btn {
  padding: 10px 18px; background: none; border: none; color: var(--text-muted);
  font-size: 14px; font-weight: 500; cursor: pointer; border-bottom: 2px solid transparent;
  transition: all 0.2s;
}
.tab-btn:hover { color: var(--text-light); }
.tab-btn.active { color: var(--primary-light); border-bottom-color: var(--primary-light); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* === MISC === */
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-muted); }
.text-primary { color: var(--primary-light); }
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.flex { display: flex; }
.flex-wrap { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-end { justify-content: flex-end; }
.hidden { display: none !important; }
@keyframes spin { to { transform: rotate(360deg); } }
.spinner { animation: spin 1s linear infinite; }
.footer {
  border-top: 1px solid var(--panel-border);
  padding: 20px; text-align: center; color: var(--text-muted); font-size: 13px; margin-top: 30px;
}

/* === VARIABLE BUTTONS === */
.var-btn {
  background: var(--primary); color: #fff; border: none; border-radius: 6px;
  padding: 6px 12px; font-size: 12px; cursor: pointer; display: inline-flex;
  align-items: center; gap: 4px; transition: all 0.2s;
}
.var-btn:hover { background: var(--primary-light); }

/* === MESSAGE PREVIEW === */
.msg-preview-item {
  padding: 14px; margin-bottom: 8px; background: rgba(255,255,255,0.03);
  border-radius: 8px; border-left: 3px solid var(--primary);
}
.msg-preview-header { display: flex; justify-content: space-between; margin-bottom: 6px; font-size: 13px; flex-wrap: wrap; gap: 4px; }
.msg-preview-body { padding: 8px 10px; background: rgba(0,0,0,0.2); border-radius: 6px; font-size: 13px; word-break: break-word; }

/* === PAGINATION === */
.pagination { display: flex; align-items: center; justify-content: center; gap: 8px; margin-top: 16px; }
.pagination .btn { min-width: 36px; }
.pagination-info { font-size: 13px; color: var(--text-muted); }

/* === FILTER BAR === */
.filter-bar { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; align-items: flex-end; }
.filter-bar .input-group { margin-bottom: 0; flex: 1; min-width: 140px; }
.filter-bar .input, .filter-bar .select-input { padding: 8px 10px; font-size: 13px; }