:root {
  --bg-light: #f8fafc;
  --bg-gradient: linear-gradient(135deg, #eef2f6 0%, #f8fafc 100%);
  --panel-bg: #ffffff;
  --border-color: rgba(15, 23, 42, 0.06);
  --primary: #4f46e5;
  --primary-glow: rgba(79, 70, 229, 0.15);
  --secondary: #7c3aed;
  --text-main: #0f172a;
  --text-muted: #64748b;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --font-sans: 'Inter', sans-serif;
  --font-heading: 'Outfit', sans-serif;
}

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

body {
  background: var(--bg-gradient);
  color: var(--text-main);
  font-family: var(--font-sans);
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }
.mt-4 { margin-top: 1rem; }
.mt-2 { margin-top: 0.5rem; }
.w-full { width: 100%; }

.app-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: 2rem;
}

/* Glass & Light Panels */
.glass-panel {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.06), 0 1px 3px rgba(0, 0, 0, 0.02);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

/* Typography */
h1, h2, h3 { font-family: var(--font-heading); font-weight: 700; color: var(--text-main); }
p { color: var(--text-muted); }

/* Buttons */
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  border: none;
  padding: 0.75rem 1.5rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(79, 70, 229, 0.3);
}

.btn-icon {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 50%;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}
.btn-icon:hover {
  background: #f1f5f9;
  color: var(--primary);
}

/* Tabs & Period Switches */
.tab-controls {
  display: flex;
  gap: 0.5rem;
  background: #f1f5f9;
  padding: 0.25rem;
  border-radius: 8px;
  border: 1px solid var(--border-color);
}
.tab-btn {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.5rem 1rem;
  font-size: 0.85rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.tab-btn.active {
  background: var(--panel-bg);
  color: var(--primary);
  box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

/* Auth Section */
.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 80vh;
}
.auth-card {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  padding: 3rem;
  border-radius: 20px;
  width: 100%;
  max-width: 450px;
  text-align: center;
  box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.1);
}
.auth-logo {
  display: inline-flex;
  padding: 1rem;
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border-radius: 16px;
  color: #fff;
  margin-bottom: 1.5rem;
}
.auth-card h1 { margin-bottom: 0.5rem; }
.auth-card p { color: var(--text-muted); margin-bottom: 2rem; }

.auth-tabs {
  display: flex;
  gap: 1rem;
  margin-bottom: 1.5rem;
  background: #f1f5f9;
  padding: 0.25rem;
  border-radius: 10px;
}
.auth-tab {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text-muted);
  padding: 0.6rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s;
}
.auth-tab.active {
  background: var(--panel-bg);
  color: var(--primary);
  box-shadow: 0 2px 6px rgba(0,0,0,0.05);
}

/* Forms */
.form-group {
  text-align: left;
  margin-bottom: 1.25rem;
}
.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
}
.form-group input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: #f8fafc;
  border: 1px solid rgba(15, 23, 42, 0.1);
  color: var(--text-main);
  border-radius: 8px;
  outline: none;
  font-size: 0.95rem;
  transition: all 0.3s;
}
.form-group input:focus {
  border-color: var(--primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
}

/* Dashboard Header */
.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border-color);
}
.header-left .logo-group {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: #fff;
  padding: 0.5rem;
  border-radius: 10px;
  display: flex;
}
.header-right {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.user-badge {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  background: var(--panel-bg);
  padding: 0.5rem 1rem;
  border-radius: 20px;
  border: 1px solid var(--border-color);
  box-shadow: 0 2px 5px rgba(0,0,0,0.03);
}
.user-avatar {
  background: #f1f5f9;
  color: var(--primary);
  border-radius: 50%;
  padding: 0.25rem;
  display: flex;
}

/* KPI Grid */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}
.kpi-card {
  padding: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.25rem;
}
.kpi-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.08);
}
.kpi-icon {
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary);
  padding: 0.75rem;
  border-radius: 12px;
  display: flex;
}
.kpi-label { color: var(--text-muted); font-size: 0.85rem; font-weight: 600; margin-bottom: 0.25rem; }
.kpi-value { font-size: 1.6rem; font-weight: 700; font-family: var(--font-heading); color: var(--text-main); }
.kpi-subtext { font-size: 0.8rem; font-weight: 500; margin-top: 0.25rem; }

.highlight-kpi {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  border: none;
  box-shadow: 0 10px 25px rgba(79, 70, 229, 0.2);
}
.highlight-kpi .kpi-label { color: rgba(255, 255, 255, 0.8); }
.highlight-kpi .kpi-value { color: #fff; }
.highlight-kpi .kpi-icon { background: rgba(255,255,255,0.2); color: #fff; }

.btn-glass {
  background: rgba(255, 255, 255, 0.2);
  border: none;
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  transition: background 0.2s;
}
.btn-glass:hover { background: rgba(255, 255, 255, 0.3); }

/* Main Grid */
.main-grid {
  display: grid;
  grid-template-columns: 1fr 2.2fr;
  gap: 2rem;
}
@media(max-width: 950px) {
  .main-grid { grid-template-columns: 1fr; }
}

.form-panel {
  height: fit-content;
}

.panel-header {
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.panel-header h3 {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.05rem;
  color: var(--text-main);
}

#bmi-form { padding: 1.5rem; }
.calculated-preview {
  background: rgba(79, 70, 229, 0.06);
  padding: 0.85rem;
  border-radius: 8px;
  border: 1px dashed var(--primary);
  color: var(--primary);
  text-align: center;
  font-weight: 600;
  font-size: 0.9rem;
  margin-top: 1rem;
}

/* Charts & Stats */
.chart-container { padding: 1.5rem; height: 320px; position: relative; }
.stat-summary-box {
  background: #f8fafc;
  border-radius: 12px;
  padding: 1rem 1.5rem;
  margin: 0 1.5rem 1.5rem 1.5rem;
  display: flex;
  justify-content: space-around;
  border: 1px solid var(--border-color);
}
.stat-item {
  text-align: center;
}
.stat-item-label {
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 0.25rem;
}
.stat-item-val {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-main);
}

/* Target & Insights Panel */
.insights-card {
  padding: 1.5rem;
  margin-bottom: 1.5rem;
}
.insights-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--primary);
}
.insights-content {
  font-size: 0.9rem;
  line-height: 1.5;
  color: #334155;
}
.target-bar-container {
  background: #f1f5f9;
  height: 8px;
  border-radius: 4px;
  overflow: hidden;
  margin-top: 0.75rem;
  position: relative;
}
.target-bar {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  height: 100%;
  width: 0%;
  transition: width 0.5s ease-in-out;
}

/* Table styling */
.table-responsive { padding: 1.5rem; overflow-x: auto; }
.data-table {
  width: 100%;
  border-collapse: collapse;
}
.data-table th, .data-table td {
  padding: 1rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.data-table th { color: var(--text-muted); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 0.05em; }
.data-table td { font-size: 0.95rem; }
.data-table tr:hover td { background: #f8fafc; }
.empty-state { text-align: center; padding: 2rem; color: var(--text-muted); }

/* Toast Notification */
.toast {
  position: fixed;
  top: 20px;
  right: 20px;
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  padding: 1rem 1.5rem;
  border-radius: 8px;
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
  z-index: 1000;
  font-weight: 600;
  transition: opacity 0.3s, transform 0.3s;
}
.toast.success { border-left: 4px solid var(--success); color: var(--text-main); }
.toast.error { border-left: 4px solid var(--danger); color: var(--danger); }

/* Modal Overlay & Settings */
.modal-overlay {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1100;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}
.settings-modal {
  background: var(--panel-bg);
  border: 1px solid var(--border-color);
  padding: 2rem;
  border-radius: 16px;
  width: 100%;
  max-width: 400px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
  transform: translateY(-20px);
  transition: transform 0.3s ease;
}
.modal-overlay.active .settings-modal {
  transform: translateY(0);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.5rem;
}
.modal-header h3 {
  font-size: 1.15rem;
}
.close-modal-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  display: flex;
  font-size: 1.25rem;
}
.close-modal-btn:hover {
  color: var(--danger);
}

/* Chart Toggles */
.chart-options {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.75rem;
  padding: 0 1.5rem;
}
.checkbox-group {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 600;
  cursor: pointer;
  user-select: none;
}
.checkbox-group input {
  accent-color: var(--primary);
  cursor: pointer;
}

/* Streak Badge */
.streak-container {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  margin-bottom: 1rem;
}
.streak-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
  color: #d97706;
  padding: 0.4rem 0.85rem;
  border-radius: 20px;
  font-weight: 700;
  font-size: 0.85rem;
  border: 1px solid #fde68a;
  box-shadow: 0 4px 10px rgba(217, 119, 6, 0.08);
}

/* Milestones Grid */
.milestones-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.75rem;
  margin-top: 0.5rem;
}
.milestone-badge {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 0.35rem;
  opacity: 0.35;
  filter: grayscale(100%);
  transition: all 0.3s ease;
}
.milestone-badge.unlocked {
  opacity: 1;
  filter: grayscale(0%);
}
.badge-icon {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: #f1f5f9;
  color: #64748b;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.15rem;
  border: 2px solid var(--border-color);
}
.milestone-badge.unlocked .badge-icon {
  background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
  color: #d97706;
  border-color: #fcd34d;
  box-shadow: 0 4px 10px rgba(217, 119, 6, 0.15);
}
.badge-title {
  font-size: 0.7rem;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

/* Calendar Grid */
.calendar-header {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
  text-align: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.35rem;
  margin-top: 0.5rem;
}
.calendar-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.35rem;
}
.calendar-day {
  aspect-ratio: 1;
  border-radius: 6px;
  background: #e2e8f0;
  border: 1px solid rgba(0,0,0,0.02);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.7rem;
  font-weight: 700;
  color: #475569;
  position: relative;
  cursor: pointer;
  transition: transform 0.2s;
}
.calendar-day:hover {
  transform: scale(1.1);
  z-index: 2;
}
.calendar-day.gain {
  background: #d1fae5;
  border-color: #a7f3d0;
  color: #065f46;
}
.calendar-day.loss {
  background: #fee2e2;
  border-color: #fecaca;
  color: #991b1b;
}
.calendar-day.no-change {
  background: #f1f5f9;
  border-color: #e2e8f0;
  color: #64748b;
}
.calendar-day.missed {
  background: transparent;
  border: 1.5px dashed #cbd5e1;
  color: #94a3b8;
}
.calendar-day::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%);
  background: #0f172a;
  color: #fff;
  padding: 0.35rem 0.6rem;
  border-radius: 6px;
  font-size: 0.65rem;
  font-weight: 500;
  white-space: nowrap;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease-in-out;
  box-shadow: 0 4px 10px rgba(0,0,0,0.15);
  z-index: 10;
}
.calendar-day:hover::after {
  opacity: 1;
}

/* Forecast Table */
.forecast-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 0.5rem;
}
.forecast-table th, .forecast-table td {
  padding: 0.6rem 0.75rem;
  font-size: 0.8rem;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.forecast-table th {
  color: var(--text-muted);
  font-weight: 700;
  text-transform: uppercase;
}
.forecast-table td {
  color: var(--text-main);
}
.forecast-table tr:last-child td {
  border-bottom: none;
}

/* MAIN TAB CONTROLS & NAVIGATION */
.main-tabs-container {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 2rem;
  border-bottom: 2px solid var(--border-color);
  padding-bottom: 0.25rem;
}
.main-tab-btn {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-muted);
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.1rem;
  padding: 0.5rem 0.75rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  transition: color 0.3s ease;
}
.main-tab-btn i {
  width: 18px;
  height: 18px;
}
.main-tab-btn:hover {
  color: var(--primary);
}
.main-tab-btn.active {
  color: var(--primary);
}
.main-tab-btn.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  border-radius: 3px;
}

#expense-form {
  padding: 1.5rem;
}

/* MOBILE RESPONSIVENESS POLISH */

/* Prevent any horizontal scroll on any screen */
html, body {
  overflow-x: hidden;
  width: 100%;
}

/* ===== TABLET (max-width: 768px) ===== */
@media (max-width: 768px) {
  .app-container {
    padding: 1rem;
  }

  /* Header: stack vertically */
  .dash-header {
    flex-direction: column;
    align-items: stretch;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
  }
  .header-left {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
  }
  .header-left .logo-group h2 {
    font-size: 1.2rem;
  }
  .header-right {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    border-top: 1px solid var(--border-color);
    padding-top: 0.75rem;
    gap: 0.5rem;
    flex-wrap: wrap;
  }
  .streak-container {
    margin-bottom: 0 !important;
  }

  /* KPI Cards: 2 columns on tablet */
  .kpi-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    margin-bottom: 1.25rem;
  }
  .kpi-card {
    padding: 1rem;
    gap: 0.75rem;
  }
  .kpi-value {
    font-size: 1.35rem;
  }

  /* Main Grid: single column */
  .main-grid {
    grid-template-columns: 1fr !important;
    gap: 1rem;
  }

  /* Main Tabs */
  .main-tabs-container {
    gap: 0.75rem;
    margin-bottom: 1.25rem;
  }
  .main-tab-btn {
    font-size: 0.95rem;
    padding: 0.5rem 0.25rem;
  }

  /* Chart options: wrap */
  .chart-options {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 0 1rem;
  }

  /* Stat summary: wrap vertically */
  .stat-summary-box {
    flex-direction: column;
    gap: 0.75rem;
    align-items: center;
    padding: 1rem;
    margin: 0 1rem 1rem 1rem;
  }

  /* Milestones: 3 cols on tablet */
  .milestones-grid {
    grid-template-columns: repeat(3, 1fr);
  }

  /* Panel header: wrap for long titles */
  .panel-header {
    flex-wrap: wrap;
    gap: 0.5rem;
    padding: 1rem;
  }
  .panel-header h3 {
    font-size: 0.95rem;
  }

  /* Tables: smaller text */
  .data-table th, .data-table td {
    padding: 0.6rem 0.5rem;
    font-size: 0.8rem;
  }

  /* Forecast table */
  .forecast-table th, .forecast-table td {
    padding: 0.5rem;
    font-size: 0.75rem;
  }

  /* Auth card: smaller padding */
  .auth-card {
    padding: 2rem 1.5rem;
    margin: 0 0.5rem;
  }
}

/* ===== PHONE (max-width: 480px) ===== */
@media (max-width: 480px) {
  .app-container {
    padding: 0.5rem;
  }

  /* Header */
  .dash-header {
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    gap: 0.5rem;
  }
  .header-left .logo-group {
    gap: 0.5rem;
  }
  .header-left .logo-group h2 {
    font-size: 1.05rem;
  }
  .logo-icon {
    padding: 0.35rem;
    border-radius: 8px;
  }
  .header-right {
    padding-top: 0.5rem;
  }
  .user-badge {
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    gap: 0.4rem;
  }
  .user-avatar {
    padding: 0.15rem;
  }
  .btn-icon {
    width: 34px;
    height: 34px;
  }
  .streak-badge {
    font-size: 0.75rem;
    padding: 0.3rem 0.6rem;
  }

  /* KPI Cards: single column on phone */
  .kpi-grid {
    grid-template-columns: 1fr !important;
    gap: 0.5rem;
    margin-bottom: 1rem;
  }
  .kpi-card {
    padding: 0.85rem;
    gap: 0.6rem;
  }
  .kpi-icon {
    padding: 0.5rem;
    border-radius: 10px;
  }
  .kpi-value {
    font-size: 1.2rem;
  }
  .kpi-label {
    font-size: 0.75rem;
  }
  .kpi-subtext {
    font-size: 0.7rem;
  }
  /* Highlight KPI button */
  .btn-glass {
    padding: 0.35rem 0.75rem;
    font-size: 0.75rem;
    gap: 0.3rem;
  }

  /* Main Tabs: fill width, smaller text */
  .main-tabs-container {
    gap: 0;
    margin-bottom: 1rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .main-tab-btn {
    font-size: 0.85rem;
    padding: 0.5rem 0.4rem;
    white-space: nowrap;
    gap: 0.3rem;
  }
  .main-tab-btn i {
    width: 14px;
    height: 14px;
  }

  /* Main Grid */
  .main-grid {
    gap: 0.75rem !important;
  }

  /* Glass panels */
  .glass-panel {
    border-radius: 12px;
  }

  /* Forms */
  #bmi-form, #expense-form {
    padding: 1rem;
  }
  .form-group {
    margin-bottom: 1rem;
  }
  .form-group label {
    font-size: 0.8rem;
  }
  .form-group input {
    padding: 0.65rem 0.85rem;
    font-size: 0.9rem;
  }
  .btn-primary {
    padding: 0.65rem 1rem;
    font-size: 0.9rem;
  }
  .calculated-preview {
    font-size: 0.8rem;
    padding: 0.65rem;
  }

  /* Panel headers */
  .panel-header {
    padding: 0.85rem 1rem;
  }
  .panel-header h3 {
    font-size: 0.9rem;
    gap: 0.35rem;
  }

  /* Chart */
  .chart-container {
    padding: 0.75rem;
    height: 250px;
  }
  .chart-options {
    flex-direction: column;
    gap: 0.4rem;
    padding: 0 0.75rem;
  }
  .checkbox-group {
    font-size: 0.75rem;
  }

  /* Stat summary */
  .stat-summary-box {
    margin: 0 0.75rem 0.75rem 0.75rem;
    padding: 0.75rem;
    gap: 0.5rem;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
  }
  .stat-item-label {
    font-size: 0.65rem;
  }
  .stat-item-val {
    font-size: 0.9rem;
  }

  /* Tables */
  .table-responsive {
    padding: 0.5rem;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .data-table th, .data-table td {
    padding: 0.5rem 0.35rem;
    font-size: 0.72rem;
    white-space: nowrap;
  }
  .data-table th {
    letter-spacing: 0;
  }

  /* Calendar grid */
  .calendar-header {
    font-size: 0.55rem;
    gap: 0.2rem;
    margin-bottom: 0.2rem;
  }
  .calendar-grid {
    gap: 0.2rem;
  }
  .calendar-day {
    font-size: 0.6rem;
    border-radius: 4px;
  }

  /* Insights cards */
  .insights-card {
    padding: 1rem;
    margin-bottom: 0.75rem;
  }
  .insights-title {
    font-size: 0.9rem;
    gap: 0.35rem;
    margin-bottom: 0.5rem;
  }
  .insights-content {
    font-size: 0.82rem;
  }

  /* Target progress bar */
  .target-bar-container {
    height: 6px;
  }

  /* Milestones: 4 columns tightly packed */
  .milestones-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.4rem;
  }
  .badge-icon {
    width: 36px;
    height: 36px;
    font-size: 0.95rem;
  }
  .badge-title {
    font-size: 0.6rem;
  }

  /* Forecast table */
  .forecast-table th, .forecast-table td {
    padding: 0.4rem 0.3rem;
    font-size: 0.7rem;
  }

  /* Inline prediction stat rows (inside goal progress panel) */
  #prediction-stats-group > div {
    font-size: 0.8rem !important;
  }

  /* Expense summary inline flex rows */
  .insights-content > div {
    font-size: 0.82rem !important;
  }

  /* Speed cards inline KPI grid */
  .kpi-grid[style*="margin-top"] {
    grid-template-columns: repeat(2, 1fr) !important;
    gap: 0.5rem !important;
  }

  /* Calendar legend (inline styles in HTML) */
  div[style*="font-size: 0.75rem"][style*="justify-content: center"] {
    flex-wrap: wrap !important;
    gap: 0.4rem !important;
    font-size: 0.65rem !important;
  }

  /* Toast notification */
  .toast {
    top: 10px;
    right: 10px;
    left: 10px;
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
  }

  /* Auth card on phone */
  .auth-card {
    padding: 1.5rem 1rem;
    border-radius: 16px;
    margin: 0 0.25rem;
  }
  .auth-card h1 {
    font-size: 1.3rem;
  }
  .auth-card p {
    font-size: 0.85rem;
    margin-bottom: 1.5rem;
  }
  .auth-logo {
    padding: 0.75rem;
    border-radius: 12px;
    margin-bottom: 1rem;
  }
  .auth-tabs {
    gap: 0.5rem;
  }

  /* Modals */
  .settings-modal {
    margin: 0.5rem;
    padding: 1.5rem;
    max-width: calc(100vw - 1rem);
    border-radius: 14px;
  }
  .confirmation-modal {
    max-width: calc(100vw - 1rem) !important;
  }
  .modal-header h3 {
    font-size: 1rem;
  }
}

/* ===== VERY SMALL PHONE (max-width: 360px) ===== */
@media (max-width: 360px) {
  .app-container {
    padding: 0.35rem;
  }

  .header-left .logo-group h2 {
    font-size: 0.95rem;
  }

  .kpi-value {
    font-size: 1.1rem;
  }

  .main-tab-btn {
    font-size: 0.78rem;
    padding: 0.4rem 0.25rem;
  }

  .milestones-grid {
    grid-template-columns: repeat(4, 1fr);
    gap: 0.3rem;
  }
  .badge-icon {
    width: 32px;
    height: 32px;
    font-size: 0.85rem;
  }
  .badge-title {
    font-size: 0.55rem;
  }

  .data-table th, .data-table td {
    padding: 0.4rem 0.25rem;
    font-size: 0.65rem;
  }

  .chart-container {
    height: 220px;
    padding: 0.5rem;
  }

  .auth-card {
    padding: 1.25rem 0.75rem;
  }
}

/* DELETE BUTTON & ACTION COLUMN STYLES */
.btn-delete {
  background: transparent;
  border: none;
  color: var(--danger);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 6px;
  transition: all 0.2s ease;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}
.btn-delete:hover {
  background: rgba(239, 68, 68, 0.1);
  color: #dc2626;
  transform: scale(1.1);
}
.btn-delete i {
  width: 15px;
  height: 15px;
}
.actions-col {
  text-align: center;
}

/* CUSTOM CONFIRMATION MODAL */
.confirmation-modal {
  max-width: 380px !important;
  border-radius: 16px !important;
  text-align: left;
}
#btn-confirm-cancel:hover {
  background: #cbd5e1 !important;
  color: #1e293b !important;
}