/* ══════════════════════════════════
   SMS Platform — Main Stylesheet
   ══════════════════════════════════ */

:root {
  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-soft: #eef2ff;
  --green: #10b981;
  --green-soft: #ecfdf5;
  --amber: #f59e0b;
  --amber-soft: #fffbeb;
  --red: #ef4444;
  --red-soft: #fef2f2;
  --blue: #3b82f6;
  --blue-soft: #eff6ff;
  --gray-50: #f8fafc;
  --gray-100: #f1f5f9;
  --gray-150: #eef1f5;
  --gray-200: #e2e8f0;
  --gray-300: #cbd5e1;
  --gray-400: #94a3b8;
  --gray-500: #64748b;
  --gray-600: #475569;
  --gray-700: #334155;
  --gray-800: #1e293b;
  --gray-900: #0f172a;
  --radius: 10px;
  --radius-lg: 14px;
  --sidebar-w: 220px;
  --topbar-h: 60px;
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow: 0 1px 3px rgba(0,0,0,0.1),0 1px 2px rgba(0,0,0,0.06);
}

* { margin:0; padding:0; box-sizing:border-box; }

body {
  font-family: "PingFang SC","Noto Sans SC","Microsoft YaHei",-apple-system,sans-serif;
  background: var(--gray-100); color: var(--gray-800); min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--primary); text-decoration: none; }

/* ════ Login page ════ */
body.auth-page {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  display: flex; align-items: center; justify-content: center;
}

.auth-card {
  background: #fff; border-radius: 20px; padding: 48px 40px 40px;
  width: 420px; max-width: calc(100vw - 32px);
  box-shadow: 0 25px 50px -12px rgba(0,0,0,0.25);
}

.auth-icon {
  width: 56px; height: 56px; background: var(--primary-soft);
  border-radius: 16px; display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px; font-size: 28px;
}

.auth-card h1 { text-align:center; font-size:22px; font-weight:700; color:var(--gray-900); margin-bottom:4px; }
.auth-card .subtitle { text-align:center; font-size:14px; color:var(--gray-400); margin-bottom:36px; }
.auth-card .footer-text { text-align:center; font-size:12px; color:var(--gray-400); margin-top:28px; }

/* ════ App layout ════ */
body.app-page { display: flex; }

/* Sidebar */
.sidebar {
  width: var(--sidebar-w); min-height: 100vh; background: var(--gray-900); color: #fff;
  position: fixed; left:0; top:0; bottom:0; display:flex; flex-direction:column; z-index:100;
}
.sidebar-brand { padding:20px 20px 24px; border-bottom:1px solid rgba(255,255,255,0.08); }
.sidebar-brand .icon { font-size:22px; margin-bottom:6px; }
.sidebar-brand h2 { font-size:16px; font-weight:700; }
.sidebar-brand span { font-size:11px; color:rgba(255,255,255,0.45); }

.sidebar-nav { flex:1; padding:12px 10px; }
.nav-item {
  display:flex; align-items:center; gap:10px; padding:10px 14px;
  border-radius:var(--radius); font-size:14px; color:rgba(255,255,255,0.65);
  cursor:pointer; transition:all 0.15s; margin-bottom:2px; text-decoration:none; font-weight:500;
}
.nav-item:hover { background:rgba(255,255,255,0.06); color:#fff; }
.nav-item.active { background:var(--primary); color:#fff; font-weight:600; }
.nav-icon { font-size:17px; width:22px; text-align:center; flex-shrink:0; }

.sidebar-footer { padding:14px 16px; border-top:1px solid rgba(255,255,255,0.08); font-size:11px; color:rgba(255,255,255,0.3); }

/* Main area */
.main-wrap { margin-left:var(--sidebar-w); flex:1; min-width:0; }

.topbar {
  height:var(--topbar-h); background:#fff; border-bottom:1px solid var(--gray-200);
  display:flex; align-items:center; justify-content:flex-end; padding:0 28px; gap:16px;
  position:sticky; top:0; z-index:50;
}
.topbar .user-info { font-size:13px; color:var(--gray-500); display:flex; align-items:center; gap:8px; }
.topbar .user-info strong { color:var(--gray-800); }
.avatar {
  width:32px; height:32px; border-radius:50%; background:var(--primary-soft);
  color:var(--primary); display:flex; align-items:center; justify-content:center;
  font-size:14px; font-weight:700;
}

.content { padding:24px 28px; }

/* ════ Card ════ */
.card {
  background:#fff; border-radius:var(--radius-lg); border:1px solid var(--gray-150);
  box-shadow:0 1px 2px rgba(0,0,0,0.03); margin-bottom:20px;
}
.card-header {
  padding:16px 22px; border-bottom:1px solid var(--gray-100);
  font-size:15px; font-weight:600; color:var(--gray-800);
  display:flex; align-items:center; gap:8px;
}
.card-body { padding:20px 22px; }

/* ════ Stat cards ════ */
.stat-grid { display:grid; grid-template-columns:repeat(4,1fr); gap:16px; margin-bottom:24px; }
.stat-card {
  background:#fff; border-radius:var(--radius-lg); padding:18px 22px;
  border:1px solid var(--gray-150); box-shadow:0 1px 2px rgba(0,0,0,0.03);
}
.stat-card .stat-label { font-size:13px; color:var(--gray-400); margin-bottom:6px; }
.stat-card .stat-value { font-size:28px; font-weight:700; color:var(--gray-900); }
.stat-card .stat-sub { font-size:12px; color:var(--gray-400); margin-top:4px; }

/* ════ Form elements ════ */
.form-group { margin-bottom:16px; }
.form-label { display:block; font-size:13px; font-weight:600; color:var(--gray-600); margin-bottom:5px; }
.form-input, .form-select, textarea.form-input {
  width:100%; padding:10px 12px; border:1.5px solid var(--gray-200);
  border-radius:8px; font-size:14px; color:var(--gray-800);
  outline:none; background:var(--gray-50); font-family:inherit;
  transition:border-color 0.15s;
}
.form-input:focus, .form-select:focus { border-color:var(--primary); background:#fff; }
.form-select { cursor:pointer; appearance:none; background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E"); background-repeat:no-repeat; background-position:right 12px center; padding-right:36px; }
textarea.form-input { resize:vertical; min-height:70px; }
.form-hint { font-size:12px; color:var(--gray-400); margin-top:4px; }

.form-row { display:grid; grid-template-columns:1fr 1fr; gap:16px; }
.form-row.col3 { grid-template-columns:1fr 1fr 1fr; }

/* ════ Buttons ════ */
.btn {
  display:inline-flex; align-items:center; gap:6px;
  padding:10px 20px; border-radius:9px; font-size:14px; font-weight:600;
  border:none; cursor:pointer; transition:all 0.12s; font-family:inherit;
  white-space:nowrap;
}
.btn-primary { background:var(--primary); color:#fff; }
.btn-primary:hover { background:var(--primary-hover); }
.btn-outline { background:#fff; border:1.5px solid var(--gray-200); color:var(--gray-700); }
.btn-outline:hover { border-color:var(--gray-300); background:var(--gray-50); }
.btn-danger { background:var(--red); color:#fff; }
.btn-danger:hover { background:#dc2626; }
.btn-green { background:var(--green); color:#fff; }
.btn-green:hover { background:#059669; }
.btn-lg { padding:12px 28px; font-size:15px; }

.btn-sm {
  padding:6px 14px; border-radius:7px; font-size:13px; font-weight:500;
  border:1.5px solid var(--gray-200); background:#fff; color:var(--gray-600);
  cursor:pointer; transition:all 0.12s; font-family:inherit;
}
.btn-sm:hover { border-color:var(--gray-300); background:var(--gray-50); }

/* ════ Table ════ */
.data-table { width:100%; border-collapse:collapse; }
.data-table th {
  text-align:left; padding:12px 16px; font-size:12px; font-weight:700;
  color:var(--gray-400); text-transform:uppercase; letter-spacing:0.03em;
  border-bottom:2px solid var(--gray-100); background:var(--gray-50);
}
.data-table td { padding:12px 16px; border-bottom:1px solid var(--gray-50); font-size:14px; color:var(--gray-700); }
.data-table tbody tr:hover { background:var(--gray-50); }
.data-table tbody tr:last-child td { border-bottom:none; }
.data-table input[type="checkbox"] { width:16px; height:16px; accent-color:var(--primary); }

/* ════ Radio group ════ */
.radio-group { display:flex; gap:20px; margin-bottom:16px; }
.radio-item { display:flex; align-items:center; gap:7px; font-size:14px; color:var(--gray-700); cursor:pointer; }
.radio-item input[type="radio"] { accent-color:var(--primary); width:16px; height:16px; }

/* ════ Chips ════ */
.chip-list { display:flex; flex-wrap:wrap; gap:8px; min-height:36px; align-items:center; }
.chip {
  display:inline-flex; align-items:center; gap:6px;
  background:var(--primary-soft); color:var(--primary); font-size:13px;
  padding:5px 10px; border-radius:20px; font-weight:500;
}
.chip .remove { cursor:pointer; opacity:0.5; font-size:16px; line-height:1; }
.chip .remove:hover { opacity:1; }

/* ════ Badges ════ */
.badge {
  display:inline-block; padding:3px 10px; border-radius:20px; font-size:12px; font-weight:600;
}
.badge-pending { background:var(--amber-soft); color:var(--amber); }
.badge-done { background:var(--green-soft); color:var(--green); }
.badge-cancel { background:var(--gray-100); color:var(--gray-400); }
.group-badge { background:var(--primary-soft); color:var(--primary); padding:3px 10px; border-radius:20px; font-size:12px; font-weight:500; }

/* ════ Pagination ════ */
.pagination {
  display:flex; align-items:center; justify-content:space-between;
  padding:12px 22px; border-top:1px solid var(--gray-100); font-size:13px; color:var(--gray-500);
}
.page-btns { display:flex; gap:4px; }
.page-btn {
  width:34px; height:34px; display:flex; align-items:center; justify-content:center;
  border:1px solid var(--gray-200); border-radius:8px; font-size:13px;
  cursor:pointer; background:#fff; color:var(--gray-600); font-family:inherit;
}
.page-btn.active { background:var(--primary); color:#fff; border-color:var(--primary); }
.page-btn:hover:not(.active) { border-color:var(--gray-300); }

/* ════ Modal ════ */
.modal-overlay {
  position:fixed; inset:0; background:rgba(0,0,0,0.4); z-index:200;
  display:flex; align-items:center; justify-content:center;
}
.modal {
  background:#fff; border-radius:16px; width:480px; max-width:calc(100vw - 32px);
  box-shadow:0 25px 50px -12px rgba(0,0,0,0.25); overflow:hidden;
}
.modal-header {
  padding:18px 24px; border-bottom:1px solid var(--gray-100);
  font-size:16px; font-weight:700; color:var(--gray-800);
  display:flex; align-items:center; justify-content:space-between;
}
.modal-close {
  width:32px; height:32px; border-radius:50%; border:none; background:var(--gray-100);
  font-size:18px; cursor:pointer; color:var(--gray-400);
  display:flex; align-items:center; justify-content:center; line-height:1;
}
.modal-close:hover { background:var(--gray-200); color:var(--gray-600); }
.modal-body { padding:20px 24px; }
.modal-footer { padding:14px 24px; border-top:1px solid var(--gray-100); display:flex; gap:10px; justify-content:flex-end; }

/* ════ Template preview ════ */
.template-preview {
  background:var(--gray-50); border:1.5px dashed var(--gray-200);
  border-radius:8px; padding:12px 16px; font-size:14px; color:var(--gray-600);
  line-height:1.6; margin-bottom:16px;
}
.template-preview .var { color:var(--primary); font-weight:600; background:var(--primary-soft); padding:1px 5px; border-radius:4px; }
.var-tag {
  display:inline-block; padding:2px 8px; border-radius:4px; font-size:12px; font-weight:500;
  background:var(--primary-soft); color:var(--primary); margin-right:4px;
}

/* ════ Schedule time box ════ */
.schedule-time-box {
  display:flex; gap:12px; align-items:center; margin-bottom:16px;
  padding:14px 16px; background:var(--amber-soft); border-radius:var(--radius);
  border:1.5px dashed var(--amber);
}
.schedule-time-box label { font-size:13px; font-weight:600; color:var(--gray-600); white-space:nowrap; }
.schedule-time-box input { padding:8px 12px; border:1.5px solid var(--gray-200); border-radius:7px; font-size:14px; font-family:inherit; outline:none; }
.schedule-time-box input:focus { border-color:var(--primary); }

/* ════ Result bar ════ */
.result-bar {
  display:flex; align-items:center; gap:16px; padding:16px 20px;
  background:var(--green-soft); border-radius:var(--radius); margin-top:16px;
}

/* ════ Dropzone ════ */
.dropzone {
  border:2px dashed var(--gray-200); border-radius:12px; padding:32px;
  text-align:center; cursor:pointer; transition:all 0.15s; margin-bottom:14px;
}
.dropzone:hover { border-color:var(--primary); background:var(--primary-soft); }
.dropzone .dz-icon { font-size:36px; margin-bottom:8px; }
.dropzone .dz-text { font-size:14px; color:var(--gray-500); }

/* ════ Group tabs ════ */
.group-tabs { display:flex; gap:6px; flex-wrap:wrap; }
.group-tab {
  padding:7px 16px; border-radius:20px; font-size:13px; font-weight:500;
  cursor:pointer; border:1.5px solid var(--gray-200); background:#fff;
  color:var(--gray-600); transition:all 0.12s; white-space:nowrap;
}
.group-tab:hover { border-color:var(--primary); color:var(--primary); }
.group-tab.active { background:var(--primary); color:#fff; border-color:var(--primary); }
.group-tab .count { font-size:11px; opacity:0.7; margin-left:3px; }

/* ════ Filter bar ════ */
.filter-bar {
  display:flex; align-items:center; gap:10px; padding:14px 22px;
  border-bottom:1px solid var(--gray-100); flex-wrap:wrap;
}
.filter-bar label { font-size:12px; font-weight:600; color:var(--gray-400); white-space:nowrap; }
.filter-input, .filter-select {
  padding:7px 12px; border:1.5px solid var(--gray-200); border-radius:7px;
  font-size:13px; color:var(--gray-700); outline:none; background:#fff; font-family:inherit;
}
.filter-input:focus, .filter-select:focus { border-color:var(--primary); }

/* ════ Two column layout ════ */
.two-col { display:grid; grid-template-columns:1fr 1fr; gap:20px; }

/* ════ Tip box ════ */
.tip-box {
  background:var(--primary-soft); border-radius:var(--radius); padding:14px 18px;
  margin-bottom:20px; font-size:13px; color:var(--gray-600); line-height:1.8;
}

/* ════ Action links ════ */
.action-link { color:var(--primary); cursor:pointer; font-size:13px; font-weight:500; background:none; border:none; font-family:inherit; }
.action-link.danger { color:var(--red); }
.action-link + .action-link { margin-left:12px; }

/* ════ Spinner ════ */
.spinner {
  display:inline-block; width:16px; height:16px;
  border:2px solid rgba(255,255,255,0.3); border-top-color:#fff;
  border-radius:50%; animation:spin 0.6s linear infinite;
}
@keyframes spin { to { transform:rotate(360deg); } }

/* ════ Error message ════ */
.error-msg { color:var(--red); font-size:13px; text-align:center; margin-top:16px; padding:8px 12px; background:var(--red-soft); border-radius:8px; display:none; }

/* ════ Responsive tweaks ════ */
@media (max-width:768px) {
  .sidebar { width:60px; }
  .sidebar-brand h2, .sidebar-brand span, .nav-item span:not(.nav-icon), .sidebar-footer { display:none; }
  .sidebar-brand { padding:16px 12px; }
  .sidebar-nav { padding:8px 6px; }
  .nav-item { justify-content:center; padding:12px; }
  .main-wrap { margin-left:60px; }
  .stat-grid { grid-template-columns:repeat(2,1fr); }
  .two-col { grid-template-columns:1fr; }
  .form-row, .form-row.col3 { grid-template-columns:1fr; }
}