/* ===== FONTS ===== */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=JetBrains+Mono:wght@400;500&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  --bg-primary: #0a0e1a;
  --bg-secondary: #111827;
  --bg-card: #1a1f36;
  --bg-card-hover: #1e2542;
  --bg-sidebar: #0d1224;
  --bg-input: #151b30;
  --text-primary: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --accent: #6c5ce7;
  --accent-hover: #7c6ff7;
  --accent-glow: rgba(108, 92, 231, 0.25);
  --success: #10b981;
  --success-bg: rgba(16, 185, 129, 0.12);
  --warning: #f59e0b;
  --warning-bg: rgba(245, 158, 11, 0.12);
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.12);
  --border: #1e293b;
  --border-light: #2a3450;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 4px 24px rgba(0,0,0,0.3);
  --shadow-lg: 0 12px 48px rgba(0,0,0,0.5);
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
  --sidebar-width: 260px;
  --font-sans: 'Inter', -apple-system, sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
}

/* ===== RESET ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; }
button { cursor: pointer; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-secondary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--accent); }

/* ===== LOGIN SCREEN ===== */
#login-screen {
  display: flex; align-items: center; justify-content: center;
  min-height: 100vh;
  background: radial-gradient(ellipse at 50% 0%, rgba(108,92,231,0.15) 0%, transparent 60%), var(--bg-primary);
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 48px 40px;
  width: 100%; max-width: 420px;
  text-align: center;
  box-shadow: var(--shadow-lg);
  animation: fadeInUp 0.6s ease;
}
.login-card .logo-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  font-size: 28px;
}
.login-card h1 { font-size: 1.5rem; font-weight: 700; margin-bottom: 6px; }
.login-card p { color: var(--text-secondary); font-size: 0.9rem; margin-bottom: 28px; }
.login-card input {
  width: 100%; padding: 14px 18px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 1rem; text-align: center; letter-spacing: 4px;
  transition: border var(--transition);
}
.login-card input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.login-card input.error { border-color: var(--danger); animation: shake 0.4s ease; }
.login-error { color: var(--danger); font-size: 0.82rem; margin-top: 8px; min-height: 20px; }

/* ===== APP LAYOUT ===== */
#app-shell { display: none; min-height: 100vh; }
.app-layout { display: flex; min-height: 100vh; }

/* ===== SIDEBAR ===== */
.sidebar {
  width: var(--sidebar-width); background: var(--bg-sidebar);
  border-right: 1px solid var(--border);
  display: flex; flex-direction: column;
  position: fixed; top: 0; left: 0; bottom: 0; z-index: 100;
  transition: transform var(--transition);
}
.sidebar-header {
  padding: 20px 18px; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 12px;
}
.sidebar-header .logo-mark {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 18px; flex-shrink: 0;
}
.sidebar-header h2 { font-size: 0.95rem; font-weight: 700; line-height: 1.2; }
.sidebar-header span { font-size: 0.72rem; color: var(--text-muted); }

/* Business selector */
.biz-selector { padding: 12px 14px; border-bottom: 1px solid var(--border); }
.biz-selector select {
  width: 100%; padding: 9px 12px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 0.82rem;
}
.biz-selector .add-biz-btn {
  width: 100%; margin-top: 8px; padding: 8px;
  background: transparent; border: 1px dashed var(--border-light);
  border-radius: var(--radius-sm); color: var(--text-muted);
  font-size: 0.78rem; display: flex; align-items: center; justify-content: center; gap: 6px;
  transition: all var(--transition);
}
.biz-selector .add-biz-btn:hover { border-color: var(--accent); color: var(--accent); }

/* Nav links */
.sidebar-nav { flex: 1; padding: 10px 10px; overflow-y: auto; }
.nav-link {
  display: flex; align-items: center; gap: 10px;
  padding: 11px 14px; border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 0.85rem; font-weight: 500;
  transition: all var(--transition); border: none; background: none; width: 100%; text-align: left;
}
.nav-link:hover { background: var(--bg-card); color: var(--text-primary); }
.nav-link.active { background: var(--accent); color: #fff; }
.nav-link .nav-icon { font-size: 1.1rem; width: 22px; text-align: center; }

.sidebar-footer {
  padding: 14px; border-top: 1px solid var(--border);
}
.sidebar-footer button {
  width: 100%; padding: 9px; background: transparent;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-muted); font-size: 0.78rem;
  transition: all var(--transition);
}
.sidebar-footer button:hover { border-color: var(--danger); color: var(--danger); }

/* ===== MAIN CONTENT ===== */
.main-content {
  flex: 1; margin-left: var(--sidebar-width);
  background: var(--bg-primary);
}
.page-header {
  padding: 24px 32px 0;
  display: flex; align-items: center; justify-content: space-between;
}
.page-header h1 { font-size: 1.55rem; font-weight: 700; }
.page-body { padding: 20px 32px 40px; }

/* Mobile hamburger */
.hamburger {
  display: none; position: fixed; top: 14px; left: 14px; z-index: 200;
  width: 40px; height: 40px;
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  align-items: center; justify-content: center; font-size: 1.2rem;
  color: var(--text-primary); cursor: pointer;
}
.sidebar-overlay {
  display: none; position: fixed; inset: 0; background: rgba(0,0,0,0.5);
  z-index: 99;
}

/* ===== CARDS ===== */
.card {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 24px;
  transition: all var(--transition);
}
.card:hover { border-color: var(--border-light); }
.card-header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.card-header h3 { font-size: 1rem; font-weight: 600; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 16px; }

/* ===== BADGE ===== */
.badge {
  display: inline-flex; align-items: center; gap: 5px;
  padding: 4px 10px; border-radius: 20px;
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
}
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-idle { background: rgba(100,116,139,0.12); color: var(--text-muted); }

/* ===== FORMS ===== */
.form-group { margin-bottom: 18px; }
.form-group label {
  display: block; font-size: 0.82rem; font-weight: 500;
  color: var(--text-secondary); margin-bottom: 6px;
}
.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 11px 14px;
  background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text-primary);
  font-size: 0.88rem; transition: border var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
  outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow);
}
.form-group textarea { resize: vertical; min-height: 120px; font-family: var(--font-sans); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 10px 20px; border-radius: var(--radius-sm);
  font-size: 0.85rem; font-weight: 600;
  border: none; transition: all var(--transition);
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); box-shadow: 0 0 20px var(--accent-glow); }
.btn-success { background: var(--success); color: #fff; }
.btn-success:hover { opacity: 0.9; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-outline {
  background: transparent; border: 1px solid var(--border);
  color: var(--text-secondary);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-sm { padding: 7px 14px; font-size: 0.78rem; }
.btn-lg { padding: 13px 28px; font-size: 0.95rem; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* ===== TABS ===== */
.tabs { display: flex; gap: 4px; border-bottom: 1px solid var(--border); margin-bottom: 24px; }
.tab-btn {
  padding: 10px 18px; background: none; border: none;
  color: var(--text-muted); font-size: 0.85rem; font-weight: 500;
  border-bottom: 2px solid transparent; transition: all var(--transition);
  cursor: pointer;
}
.tab-btn:hover { color: var(--text-secondary); }
.tab-btn.active { color: var(--accent); border-bottom-color: var(--accent); }
.tab-panel { display: none; animation: fadeIn 0.3s ease; }
.tab-panel.active { display: block; }

/* ===== CODE BLOCK ===== */
.code-block {
  position: relative; background: #0d1117;
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  overflow: hidden; margin: 12px 0;
}
.code-block-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 8px 14px; background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
  font-size: 0.75rem; color: var(--text-muted);
}
.code-block pre {
  padding: 14px; overflow-x: auto;
  font-family: var(--font-mono); font-size: 0.78rem;
  line-height: 1.6; color: #c9d1d9;
  max-height: 300px;
}
.copy-btn {
  padding: 4px 10px; background: var(--accent); color: #fff;
  border: none; border-radius: 4px; font-size: 0.72rem; font-weight: 600;
  cursor: pointer; transition: all var(--transition);
}
.copy-btn:hover { background: var(--accent-hover); }

/* ===== TEMPLATE EDITOR ===== */
.template-editor { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.chip-bar { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 12px; }
.chip {
  padding: 5px 12px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: 20px;
  font-size: 0.75rem; color: var(--accent); cursor: pointer;
  font-family: var(--font-mono); transition: all var(--transition);
}
.chip:hover { background: var(--accent); color: #fff; border-color: var(--accent); }
.preview-pane {
  background: #fff; color: #1a1a2e; border-radius: var(--radius-sm);
  padding: 24px; font-size: 0.9rem; line-height: 1.7;
  border: 1px solid var(--border); min-height: 200px;
  white-space: pre-wrap;
}

/* ===== TABLE ===== */
.data-table { width: 100%; border-collapse: separate; border-spacing: 0; }
.data-table th {
  padding: 10px 14px; text-align: left;
  font-size: 0.75rem; font-weight: 600; text-transform: uppercase;
  color: var(--text-muted); border-bottom: 1px solid var(--border);
  letter-spacing: 0.5px;
}
.data-table td {
  padding: 12px 14px; font-size: 0.85rem;
  border-bottom: 1px solid var(--border); color: var(--text-secondary);
}
.data-table tr:hover td { background: var(--bg-card-hover); }
.data-table .status-dot {
  display: inline-block; width: 8px; height: 8px; border-radius: 50%; margin-right: 6px;
}
.data-table .status-dot.sent { background: var(--success); }
.data-table .status-dot.skipped { background: var(--warning); }
.data-table .status-dot.error { background: var(--danger); }

/* ===== TOGGLE SWITCH ===== */
.toggle-wrap { display: flex; align-items: center; gap: 12px; }
.toggle {
  position: relative; width: 48px; height: 26px;
  background: var(--border); border-radius: 13px;
  cursor: pointer; transition: background var(--transition);
  border: none;
}
.toggle.on { background: var(--accent); }
.toggle::after {
  content: ''; position: absolute;
  top: 3px; left: 3px; width: 20px; height: 20px;
  background: #fff; border-radius: 50%;
  transition: transform var(--transition);
}
.toggle.on::after { transform: translateX(22px); }

/* ===== TOAST ===== */
.toast-container { position: fixed; top: 20px; right: 20px; z-index: 9999; display: flex; flex-direction: column; gap: 8px; }
.toast {
  padding: 14px 20px; border-radius: var(--radius-sm);
  font-size: 0.85rem; font-weight: 500;
  box-shadow: var(--shadow);
  animation: slideInRight 0.3s ease, fadeOut 0.3s ease 3.5s forwards;
  max-width: 380px;
}
.toast-success { background: var(--success); color: #fff; }
.toast-error { background: var(--danger); color: #fff; }
.toast-info { background: var(--accent); color: #fff; }

/* ===== MODAL ===== */
.modal-overlay {
  display: none; position: fixed; inset: 0;
  background: rgba(0,0,0,0.6); z-index: 500;
  align-items: center; justify-content: center;
  animation: fadeIn 0.2s ease;
}
.modal-overlay.show { display: flex; }
.modal {
  background: var(--bg-card); border: 1px solid var(--border);
  border-radius: var(--radius-lg); padding: 32px;
  width: 90%; max-width: 500px;
  box-shadow: var(--shadow-lg); animation: fadeInUp 0.3s ease;
}
.modal h2 { font-size: 1.2rem; margin-bottom: 18px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 24px; }

/* ===== DASHBOARD STAT CARDS ===== */
.stat-card { text-align: center; padding: 28px; }
.stat-card .stat-value { font-size: 2rem; font-weight: 800; color: var(--accent); margin-bottom: 6px; }
.stat-card .stat-label { font-size: 0.82rem; color: var(--text-muted); }
.stat-card .stat-icon { font-size: 2rem; margin-bottom: 10px; }

/* ===== SCHEDULER CARD ===== */
.scheduler-card { max-width: 500px; }
.scheduler-card .time-picker {
  display: flex; align-items: center; gap: 12px; margin: 16px 0;
}
.scheduler-card .time-picker input[type="time"] {
  padding: 10px 14px; background: var(--bg-input);
  border: 1px solid var(--border); border-radius: var(--radius-sm);
  color: var(--text-primary); font-size: 1.1rem;
}

/* ===== ANIMATIONS ===== */
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes fadeInUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideInRight { from { opacity: 0; transform: translateX(80px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeOut { from { opacity: 1; } to { opacity: 0; } }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-6px); }
  75% { transform: translateX(6px); }
}
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.5; } }
.page-section { animation: fadeInUp 0.4s ease; }

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .hamburger { display: flex; }
  .sidebar { transform: translateX(-100%); }
  .sidebar.open { transform: translateX(0); }
  .sidebar-overlay.show { display: block; }
  .main-content { margin-left: 0; }
  .page-header { padding: 18px 16px 0; padding-top: 60px; }
  .page-body { padding: 16px 16px 32px; }
  .template-editor { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .card-grid { grid-template-columns: 1fr; }
}