/* ========================================================
   AEROSYNC - ULTRA MODERN DESIGN SYSTEM & STYLESHEET
   ======================================================== */

:root {
  /* Color Palette */
  --bg-main: #0B0F19;
  --bg-card: rgba(17, 24, 39, 0.75);
  --bg-card-hover: rgba(30, 41, 59, 0.7);
  --bg-surface: #131B2E;
  --bg-subtle: rgba(255, 255, 255, 0.04);
  --bg-input: rgba(15, 23, 42, 0.65);
  
  --border-subtle: rgba(255, 255, 255, 0.08);
  --border-medium: rgba(255, 255, 255, 0.14);
  --border-focus: #6366F1;

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;
  --text-inverse: #0B0F19;

  /* Accents & Categories */
  --primary: #6366F1;
  --primary-hover: #4F46E5;
  --primary-light: rgba(99, 102, 241, 0.15);
  
  --cat-work: #3B82F6;
  --cat-work-bg: rgba(59, 130, 246, 0.15);
  --cat-personal: #10B981;
  --cat-personal-bg: rgba(16, 185, 129, 0.15);
  --cat-meeting: #8B5CF6;
  --cat-meeting-bg: rgba(139, 92, 246, 0.15);
  --cat-important: #EF4444;
  --cat-important-bg: rgba(239, 68, 68, 0.15);
  --cat-reminder: #F59E0B;
  --cat-reminder-bg: rgba(245, 158, 11, 0.15);
  --cat-finance: #06B6D4;
  --cat-finance-bg: rgba(6, 182, 212, 0.15);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-full: 9999px;

  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 10px 25px -5px rgba(0, 0, 0, 0.4), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 20px 40px -10px rgba(0, 0, 0, 0.6);
  --glow-primary: 0 0 25px rgba(99, 102, 241, 0.35);

  --transition-fast: 0.15s ease;
  --transition-base: 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html, body {
  width: 100%;
  min-height: 100vh;
  background-color: var(--bg-main);
  background-image: 
    radial-gradient(at 15% 15%, rgba(99, 102, 241, 0.12) 0px, transparent 50%),
    radial-gradient(at 85% 85%, rgba(16, 185, 129, 0.08) 0px, transparent 50%),
    radial-gradient(at 50% 50%, rgba(14, 165, 233, 0.06) 0px, transparent 50%);
  background-attachment: fixed;
  color: var(--text-primary);
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Utilities */
.hidden { display: none !important; }
.flex-between { display: flex; justify-content: space-between; align-items: center; }

/* ========================================================
   SECURITY LOCK SCREEN / GATEWAY
   ======================================================== */
.auth-overlay {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: rgba(11, 15, 25, 0.88);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  transition: opacity 0.35s ease, visibility 0.35s ease;
}

.auth-overlay:not(.active) {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  box-shadow: var(--shadow-lg), var(--glow-primary);
  text-align: center;
  animation: modalScaleUp 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-card.shake {
  animation: shake 0.45s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

.auth-icon-wrap {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.25rem;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(99, 102, 241, 0.2), rgba(16, 185, 129, 0.1));
  border: 1px solid rgba(99, 102, 241, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
}

.auth-shield-icon {
  width: 30px;
  height: 30px;
}

.auth-title {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 0.35rem;
  background: linear-gradient(135deg, #FFF, #94A3B8);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.auth-subtitle {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-bottom: 0.85rem;
}

.auth-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  background: rgba(99, 102, 241, 0.15);
  color: #818CF8;
  border: 1px solid rgba(99, 102, 241, 0.25);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 1.75rem;
}

.auth-form {
  text-align: left;
}

.password-input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.password-input {
  padding-right: 3rem !important;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
}

.toggle-password-btn {
  position: absolute;
  right: 0.75rem;
  background: none;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  padding: 0.35rem;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast);
}

.toggle-password-btn:hover {
  color: var(--text-primary);
}

.toggle-password-btn svg {
  width: 20px;
  height: 20px;
}

.auth-error-msg {
  color: #F87171;
  font-size: 0.82rem;
  margin-top: 0.5rem;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.remember-row {
  margin: 1.25rem 0 1.5rem;
}

/* Custom Checkbox */
.custom-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 0.65rem;
  cursor: pointer;
  user-select: none;
  font-size: 0.85rem;
  color: var(--text-secondary);
}

.custom-checkbox-label input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.checkbox-box {
  width: 18px;
  height: 18px;
  border: 1.5px solid var(--border-medium);
  border-radius: 5px;
  background: var(--bg-input);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.custom-checkbox-label input:checked + .checkbox-box {
  background: var(--primary);
  border-color: var(--primary);
}

.custom-checkbox-label input:checked + .checkbox-box::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

/* ========================================================
   CORE APP LAYOUT
   ======================================================== */
.app-layout {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  padding-bottom: 5rem; /* space for mobile bottom bar */
}

/* App Header */
.app-header {
  position: sticky;
  top: 0;
  z-index: 40;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1.75rem;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-subtle);
}

.header-left {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, #4F46E5, #06B6D4);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFF;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.35);
}

.logo-mark svg {
  width: 22px;
  height: 22px;
}

.brand-name {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.header-date {
  font-size: 0.78rem;
  color: var(--text-muted);
}

/* Desktop Navigation Segment */
.desktop-nav {
  display: flex;
  align-items: center;
  background: rgba(15, 23, 42, 0.6);
  padding: 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--border-subtle);
  gap: 0.25rem;
}

.nav-tab {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1rem;
  border-radius: var(--radius-full);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-tab svg {
  width: 17px;
  height: 17px;
}

.nav-tab:hover {
  color: var(--text-primary);
}

.nav-tab.active {
  background: var(--primary);
  color: #FFF;
  box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.badge-counter {
  background: rgba(255, 255, 255, 0.2);
  color: #FFF;
  font-size: 0.7rem;
  padding: 0.1rem 0.4rem;
  border-radius: var(--radius-full);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* Main Container */
.main-container {
  max-width: 1240px;
  width: 100%;
  margin: 0 auto;
  padding: 1.75rem 1.25rem;
  flex: 1;
}

.view-section {
  display: none;
  animation: fadeIn 0.25s ease-out;
}

.view-section.active {
  display: block;
}

/* ========================================================
   VIEW 1: DASHBOARD
   ======================================================== */
.stats-ribbon {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
  margin-bottom: 1.75rem;
}

.stat-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  transition: transform var(--transition-fast), border-color var(--transition-fast);
}

.stat-card:hover {
  transform: translateY(-2px);
  border-color: var(--border-medium);
}

.stat-icon-wrap {
  width: 46px;
  height: 46px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.stat-icon-wrap svg {
  width: 24px;
  height: 24px;
}

.bg-blue-subtle { background: rgba(59, 130, 246, 0.15); color: #60A5FA; }
.bg-emerald-subtle { background: rgba(16, 185, 129, 0.15); color: #34D399; }
.bg-purple-subtle { background: rgba(168, 85, 247, 0.15); color: #C084FC; }

.stat-label {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
  font-weight: 500;
}

.stat-value {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.dashboard-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.dash-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
}

.card-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
  padding-bottom: 0.85rem;
  border-bottom: 1px solid var(--border-subtle);
}

.card-title {
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.card-subtitle {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.events-stack, .tasks-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  flex: 1;
}

.dash-task-quick-input {
  margin-bottom: 1rem;
}

/* Event Item Card */
.event-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--bg-subtle);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  border-left: 4px solid var(--primary);
  transition: all var(--transition-fast);
}

.event-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
}

.event-item.cat-work { border-left-color: var(--cat-work); }
.event-item.cat-personal { border-left-color: var(--cat-personal); }
.event-item.cat-meeting { border-left-color: var(--cat-meeting); }
.event-item.cat-important { border-left-color: var(--cat-important); }
.event-item.cat-reminder { border-left-color: var(--cat-reminder); }

.event-info {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.event-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-primary);
}

.event-meta {
  font-size: 0.78rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.event-time-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.event-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* Empty state */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 3rem 1.5rem;
  color: var(--text-muted);
  text-align: center;
  gap: 0.5rem;
}

.empty-state svg {
  width: 44px;
  height: 44px;
  stroke: var(--text-muted);
  opacity: 0.6;
  margin-bottom: 0.5rem;
}

/* ========================================================
   VIEW 2: FULL CALENDAR
   ======================================================== */
.calendar-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.calendar-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.cal-nav-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.current-month-label {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  min-width: 190px;
}

.cal-filter-group {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.calendar-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow-md);
}

.weekdays-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  text-align: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--border-subtle);
}

.days-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.5rem;
}

.cal-day-cell {
  min-height: 105px;
  background: rgba(15, 23, 42, 0.4);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  display: flex;
  flex-direction: column;
  cursor: pointer;
  transition: all var(--transition-fast);
  position: relative;
}

.cal-day-cell:hover {
  background: var(--bg-card-hover);
  border-color: var(--primary);
  transform: translateY(-1px);
}

.cal-day-cell.other-month {
  opacity: 0.35;
  background: transparent;
}

.cal-day-cell.today {
  border-color: rgba(99, 102, 241, 0.6);
  background: rgba(99, 102, 241, 0.08);
}

.cal-day-cell.today .day-num {
  background: var(--primary);
  color: #FFF;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
}

.day-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.35rem;
}

.day-num {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.day-events-pills {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  overflow: hidden;
}

.cal-pill {
  font-size: 0.72rem;
  font-weight: 600;
  padding: 0.15rem 0.45rem;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  line-height: 1.2;
}

.cal-pill.cat-work { background: var(--cat-work-bg); color: #93C5FD; border-left: 2px solid var(--cat-work); }
.cal-pill.cat-personal { background: var(--cat-personal-bg); color: #6EE7B7; border-left: 2px solid var(--cat-personal); }
.cal-pill.cat-meeting { background: var(--cat-meeting-bg); color: #C4B5FD; border-left: 2px solid var(--cat-meeting); }
.cal-pill.cat-important { background: var(--cat-important-bg); color: #FCA5A5; border-left: 2px solid var(--cat-important); }
.cal-pill.cat-reminder { background: var(--cat-reminder-bg); color: #FCD34D; border-left: 2px solid var(--cat-reminder); }

.more-pills-label {
  font-size: 0.68rem;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 0.1rem;
}

/* ========================================================
   VIEW 3: TO-DO TASK TRACKER
   ======================================================== */
.tasks-page-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.task-page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.section-heading {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.section-subheading {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.task-progress-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.25rem;
  min-width: 250px;
}

.progress-info-row {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  margin-bottom: 0.5rem;
}

.progress-text-label {
  color: var(--text-muted);
}

.progress-text-score {
  font-weight: 700;
  color: var(--primary);
}

.progress-bar-container {
  height: 7px;
  background: rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-full);
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #6366F1, #10B981);
  border-radius: var(--radius-full);
  transition: width 0.3s ease;
}

/* New Task Card */
.new-task-card {
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
}

.task-title-input {
  font-size: 1rem;
  font-weight: 500;
  margin-bottom: 0.85rem;
}

.task-form-options {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.task-option-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mini-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  font-weight: 600;
}

.mini-input, .mini-select {
  padding: 0.45rem 0.75rem !important;
  font-size: 0.85rem !important;
  height: 38px;
}

.task-add-submit-btn {
  margin-left: auto;
  align-self: flex-end;
  height: 38px;
}

/* Toolbar & Filters */
.tasks-toolbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}

.task-filter-chips {
  display: flex;
  gap: 0.5rem;
  overflow-x: auto;
  padding-bottom: 0.25rem;
}

.filter-chip {
  padding: 0.4rem 0.95rem;
  border-radius: var(--radius-full);
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.filter-chip:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
}

.filter-chip.active {
  background: var(--primary);
  color: #FFF;
  border-color: var(--primary);
}

.task-search-wrap {
  position: relative;
  min-width: 240px;
}

.task-search-wrap .search-icon {
  position: absolute;
  left: 0.75rem;
  top: 50%;
  transform: translateY(-50%);
  width: 17px;
  height: 17px;
  stroke: var(--text-muted);
}

.search-input {
  padding-left: 2.25rem !important;
  height: 38px;
}

/* Task Item Component */
.tasks-list-container {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.task-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 0.95rem 1.25rem;
  transition: all var(--transition-fast);
  gap: 0.75rem;
}

.task-item:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-medium);
}

.task-item.completed {
  opacity: 0.6;
}

.task-item.completed .task-text {
  text-decoration: line-through;
  color: var(--text-muted);
}

.task-left-meta {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  flex: 1;
}

.task-check-circle {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 2px solid var(--border-medium);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.task-item:not(.completed) .task-check-circle:hover {
  border-color: var(--primary);
  background: rgba(99, 102, 241, 0.15);
}

.task-item.completed .task-check-circle {
  background: #10B981;
  border-color: #10B981;
}

.task-item.completed .task-check-circle::after {
  content: "";
  width: 5px;
  height: 9px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg) translate(-1px, -1px);
}

.task-text-group {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
}

.task-text {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-primary);
}

.task-badges {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-wrap: wrap;
}

.badge-tag {
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-full);
}

.priority-high { background: rgba(239, 68, 68, 0.15); color: #F87171; }
.priority-medium { background: rgba(245, 158, 11, 0.15); color: #FBBF24; }
.priority-low { background: rgba(59, 130, 246, 0.15); color: #60A5FA; }

.due-badge {
  font-size: 0.72rem;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 0.25rem;
}

.due-badge.overdue {
  color: #EF4444;
  font-weight: 600;
}

.task-actions {
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

/* ========================================================
   BUTTONS & FORM ELEMENTS
   ======================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.65rem 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
  user-select: none;
}

.btn-primary {
  background: var(--primary);
  color: #FFF;
  box-shadow: 0 4px 14px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(99, 102, 241, 0.45);
}

.btn-outline {
  background: transparent;
  border-color: var(--border-medium);
  color: var(--text-primary);
}

.btn-outline:hover {
  background: var(--bg-subtle);
  border-color: var(--text-secondary);
}

.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 0.4rem 0.75rem;
}

.btn-ghost:hover {
  background: var(--primary-light);
}

.btn-sm {
  padding: 0.4rem 0.85rem;
  font-size: 0.82rem;
  border-radius: var(--radius-sm);
}

.btn-block {
  width: 100%;
}

.btn-icon {
  width: 18px;
  height: 18px;
}

.btn-icon-square {
  width: 38px;
  height: 38px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon-square:hover {
  color: var(--text-primary);
  border-color: var(--border-medium);
  background: var(--bg-card-hover);
}

.btn-icon-square svg {
  width: 18px;
  height: 18px;
}

.btn-icon-ghost {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-icon-ghost:hover {
  color: var(--text-primary);
  background: var(--bg-subtle);
}

.btn-icon-ghost svg {
  width: 19px;
  height: 19px;
}

/* Forms */
.form-group {
  margin-bottom: 1.15rem;
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.65rem 0.95rem;
  background: var(--bg-input);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.9rem;
  transition: all var(--transition-fast);
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.25);
}

.form-select {
  cursor: pointer;
}

.form-select option {
  background: #111827;
  color: #FFF;
}

/* ========================================================
   MODALS
   ======================================================== */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 100;
  background: rgba(11, 15, 25, 0.8);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  animation: fadeIn 0.2s ease-out;
}

.modal-card {
  width: 100%;
  max-width: 520px;
  background: var(--bg-surface);
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 1.75rem;
  max-height: 90vh;
  overflow-y: auto;
  animation: modalScaleUp 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.modal-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  margin-bottom: 1.25rem;
}

.modal-title {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.close-modal-btn {
  font-size: 1.5rem;
  line-height: 1;
}

.modal-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 0.75rem;
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
}

/* Day Schedule List in Modal */
.day-events-container {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 320px;
  overflow-y: auto;
  margin: 1rem 0;
}

/* Backup Content */
.backup-desc {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  line-height: 1.6;
}

.backup-action-card {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  background: var(--bg-subtle);
  margin-bottom: 0.85rem;
}

.backup-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: rgba(99, 102, 241, 0.15);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.backup-icon svg {
  width: 20px;
  height: 20px;
}

.backup-text {
  flex: 1;
}

.backup-text h4 {
  font-size: 0.9rem;
  font-weight: 600;
}

.backup-text p {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.file-input-label {
  cursor: pointer;
}

.hidden-file-input {
  display: none;
}

/* ========================================================
   MOBILE BOTTOM NAVIGATION & RESPONSIVENESS
   ======================================================== */
.mobile-bottom-nav {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: rgba(11, 15, 25, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-subtle);
  z-index: 50;
  align-items: center;
  justify-content: space-around;
  padding: 0 0.5rem;
  padding-bottom: env(safe-area-inset-bottom);
}

.mobile-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.2rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 0.7rem;
  font-weight: 600;
  cursor: pointer;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.mobile-nav-item svg {
  width: 22px;
  height: 22px;
}

.mobile-nav-item.active {
  color: var(--primary);
}

.mobile-fab-center {
  background: var(--primary);
  color: #FFF;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  margin-top: -24px;
  box-shadow: 0 4px 16px rgba(99, 102, 241, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-fab-center svg {
  width: 24px;
  height: 24px;
}

/* Toast Notifications */
.toast-container {
  position: fixed;
  bottom: 5rem;
  right: 1.5rem;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: #1E293B;
  color: #FFF;
  border: 1px solid var(--border-medium);
  border-radius: var(--radius-md);
  padding: 0.75rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 500;
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 0.65rem;
  animation: toastSlideIn 0.25s ease-out;
}

.toast-success { border-left: 4px solid #10B981; }
.toast-error { border-left: 4px solid #EF4444; }

/* Keyframe Animations */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes modalScaleUp {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

@keyframes toastSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes shake {
  10%, 90% { transform: translate3d(-2px, 0, 0); }
  20%, 80% { transform: translate3d(4px, 0, 0); }
  30%, 50%, 70% { transform: translate3d(-6px, 0, 0); }
  40%, 60% { transform: translate3d(6px, 0, 0); }
}

/* ========================================================
   RESPONSIVE BREAKPOINTS (MOBILE & TABLET OPTIMIZATIONS)
   ======================================================== */
@media (max-width: 900px) {
  .dashboard-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  .desktop-nav {
    display: none;
  }

  .mobile-bottom-nav {
    display: flex;
  }

  .hide-mobile {
    display: none;
  }

  .cal-day-cell {
    min-height: 64px;
    padding: 0.35rem;
  }

  .cal-pill {
    padding: 0.1rem 0.25rem;
    font-size: 0.65rem;
  }

  .form-row-2 {
    grid-template-columns: 1fr;
  }

  .app-header {
    padding: 0.75rem 1rem;
  }

  .toast-container {
    bottom: 5.5rem;
    right: 1rem;
    left: 1rem;
  }
}