/* ============================
   CSS Custom Properties
   ============================ */
:root {
  --bg-primary: #0a0e27;
  --bg-secondary: #111638;
  --bg-card: rgba(255, 255, 255, 0.05);
  --bg-card-hover: rgba(255, 255, 255, 0.08);
  --border-card: rgba(255, 255, 255, 0.1);
  --text-primary: #f0f2ff;
  --text-secondary: #8a8fb5;
  --text-muted: #5a5f80;
  --accent: #00d4aa;
  --accent-secondary: #00b4d8;
  --gradient-accent: linear-gradient(135deg, #00d4aa 0%, #00b4d8 100%);
  --gradient-accent-hover: linear-gradient(135deg, #00e4ba 0%, #00c4e8 100%);
  --status-upcoming: #00d4aa;
  --status-overdue: #ff4d6a;
  --status-done: #5a5f80;
  --danger: #ff4d6a;
  --danger-hover: #ff6b82;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-xs: 6px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
  --shadow-btn: 0 4px 16px rgba(0, 212, 170, 0.25);
  --font-stack: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
  --tab-height: 64px;
  --header-height: 56px;
  --safe-bottom: env(safe-area-inset-bottom, 0px);
}

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

html {
  font-size: 16px;
  -webkit-tap-highlight-color: transparent;
}

body {
  font-family: var(--font-stack);
  background: var(--bg-primary);
  color: var(--text-primary);
  min-height: 100vh;
  min-height: 100dvh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ============================
   Header
   ============================ */
.app-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: rgba(10, 14, 39, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-card);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
}

.header-content {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-icon {
  font-size: 1.5rem;
}

.app-header h1 {
  font-size: 1.15rem;
  font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: -0.3px;
}

/* ============================
   Main Content
   ============================ */
.app-main {
  padding-top: calc(var(--header-height) + 12px);
  padding-bottom: calc(var(--tab-height) + var(--safe-bottom) + 16px);
  padding-left: 16px;
  padding-right: 16px;
  max-width: 500px;
  margin: 0 auto;
}

/* ============================
   Tab Content Visibility
   ============================ */
.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn 0.25s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ============================
   Stats Row
   ============================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 20px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 14px 10px;
  text-align: center;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.stat-number {
  font-size: 1.7rem;
  font-weight: 800;
  line-height: 1;
  margin-bottom: 4px;
}

.stat-number.accent { color: var(--accent); }
.stat-number.warn { color: #ffb347; }
.stat-number.danger { color: var(--danger); }

.stat-label {
  font-size: 0.7rem;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 600;
}

/* ============================
   Section Headings
   ============================ */
.section-heading {
  font-size: 0.95rem;
  font-weight: 700;
  margin: 20px 0 10px;
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-primary);
}

/* ============================
   Cards
   ============================ */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  padding: 20px;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  box-shadow: var(--shadow-card);
  margin-bottom: 14px;
}

.card h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 6px;
}

.card-desc {
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 16px;
  line-height: 1.4;
}

/* ============================
   Lead Cards
   ============================ */
.leads-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.lead-card {
  background: var(--bg-card);
  border: 1px solid var(--border-card);
  border-radius: var(--radius);
  padding: 16px;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background 0.2s, transform 0.2s;
  animation: slideUp 0.3s ease both;
}

.lead-card:hover {
  background: var(--bg-card-hover);
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}

.lead-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 8px;
}

.lead-name {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lead-name .urgency-flag {
  font-size: 0.75rem;
  background: var(--danger);
  color: #fff;
  padding: 1px 6px;
  border-radius: 4px;
  font-weight: 700;
  letter-spacing: 0.3px;
}

.lead-status {
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 3px 10px;
  border-radius: 20px;
  white-space: nowrap;
}

.lead-status.upcoming {
  background: rgba(0, 212, 170, 0.15);
  color: var(--status-upcoming);
}

.lead-status.overdue {
  background: rgba(255, 77, 106, 0.15);
  color: var(--status-overdue);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}

.lead-status.done {
  background: rgba(90, 95, 128, 0.2);
  color: var(--status-done);
}

.lead-details {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 10px;
}

.lead-detail {
  font-size: 0.82rem;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  gap: 6px;
}

.lead-detail span.emoji {
  font-size: 0.9rem;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.lead-actions {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.lead-action-btn {
  font-size: 0.75rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-card);
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  transition: all 0.2s;
  font-family: var(--font-stack);
}

.lead-action-btn:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.lead-action-btn.done-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.lead-action-btn.delete-btn:hover {
  border-color: var(--danger);
  color: var(--danger);
}

/* ============================
   Form Elements
   ============================ */
textarea, input[type="text"], input[type="date"] {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-card);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text-primary);
  font-family: var(--font-stack);
  font-size: 0.92rem;
  outline: none;
  transition: border-color 0.25s, box-shadow 0.25s;
  resize: vertical;
}

textarea:focus, input[type="text"]:focus, input[type="date"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.15), 0 0 20px rgba(0, 212, 170, 0.08);
}

input[type="date"]::-webkit-calendar-picker-indicator {
  filter: invert(1) brightness(0.7);
}

label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 14px;
}

label input, label textarea {
  margin-top: 6px;
}

.urgency-label {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-direction: row;
  cursor: pointer;
  user-select: none;
}

.urgency-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--accent);
  cursor: pointer;
  margin-top: 0;
}

/* ============================
   Buttons
   ============================ */
.btn-primary {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--gradient-accent);
  color: #0a0e27;
  font-family: var(--font-stack);
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: transform 0.15s, box-shadow 0.2s, opacity 0.2s;
  box-shadow: var(--shadow-btn);
  letter-spacing: -0.2px;
  margin-top: 4px;
}

.btn-primary:hover {
  background: var(--gradient-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0, 212, 170, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-confirm {
  margin-top: 8px;
}

.btn-secondary {
  padding: 10px 22px;
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-stack);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
}

.btn-secondary:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.btn-danger {
  padding: 10px 22px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--danger);
  color: #fff;
  font-family: var(--font-stack);
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background 0.2s;
}

.btn-danger:hover {
  background: var(--danger-hover);
}

/* ============================
   Filter Bar
   ============================ */
.filter-bar {
  display: flex;
  gap: 8px;
  margin-bottom: 16px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.filter-bar::-webkit-scrollbar { display: none; }

.filter-btn {
  padding: 8px 18px;
  border-radius: 20px;
  border: 1px solid var(--border-card);
  background: transparent;
  color: var(--text-secondary);
  font-family: var(--font-stack);
  font-size: 0.82rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  white-space: nowrap;
  flex-shrink: 0;
}

.filter-btn.active {
  background: var(--gradient-accent);
  color: var(--bg-primary);
  border-color: transparent;
}

.filter-btn:not(.active):hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

/* ============================
   Empty States
   ============================ */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--text-muted);
}

.empty-icon {
  font-size: 3rem;
  margin-bottom: 12px;
  opacity: 0.5;
}

.empty-state p {
  font-size: 0.92rem;
  margin-bottom: 4px;
}

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

/* ============================
   Modals
   ============================ */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  z-index: 200;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  animation: fadeIn 0.2s ease;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius) var(--radius) 0 0;
  padding: 24px 20px calc(20px + var(--safe-bottom));
  width: 100%;
  max-width: 500px;
  max-height: 85vh;
  overflow-y: auto;
  animation: slideUpModal 0.3s ease;
}

.modal-card-sm {
  text-align: center;
  padding: 28px 20px calc(24px + var(--safe-bottom));
}

.modal-card-sm h2 {
  margin-bottom: 8px;
}

.modal-card-sm p {
  color: var(--text-secondary);
  font-size: 0.88rem;
  margin-bottom: 20px;
}

@keyframes slideUpModal {
  from { transform: translateY(100%); }
  to { transform: translateY(0); }
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.modal-header h2 {
  font-size: 1.1rem;
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: 1px solid var(--border-card);
  background: transparent;
  color: var(--text-secondary);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s;
}

.modal-close:hover {
  background: var(--bg-card-hover);
  color: var(--text-primary);
}

.modal-actions {
  display: flex;
  gap: 10px;
  justify-content: center;
}

/* ============================
   Toast Notifications
   ============================ */
#toast-container {
  position: fixed;
  top: calc(var(--header-height) + 10px);
  left: 50%;
  transform: translateX(-50%);
  z-index: 300;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
  width: calc(100% - 32px);
  max-width: 468px;
}

.toast {
  background: var(--bg-secondary);
  border: 1px solid var(--border-card);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--text-primary);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
  animation: toastIn 0.3s ease, toastOut 0.3s ease 2.5s forwards;
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 8px;
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(-12px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateY(0); }
  to { opacity: 0; transform: translateY(-12px); }
}

/* ============================
   Bottom Tab Bar
   ============================ */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(var(--tab-height) + var(--safe-bottom));
  padding-bottom: var(--safe-bottom);
  background: rgba(10, 14, 39, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-top: 1px solid var(--border-card);
  display: flex;
  justify-content: space-around;
  align-items: center;
  z-index: 100;
  max-width: 500px;
  margin: 0 auto;
}

/* Ensure tab bar stretches full width on wider screens */
@media (min-width: 500px) {
  .tab-bar {
    left: 50%;
    transform: translateX(-50%);
    width: 500px;
  }
}

.tab-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  background: none;
  border: none;
  color: var(--text-muted);
  font-family: var(--font-stack);
  cursor: pointer;
  padding: 6px 16px;
  transition: color 0.2s;
  -webkit-tap-highlight-color: transparent;
}

.tab-btn.active {
  color: var(--accent);
}

.tab-icon {
  font-size: 1.35rem;
  line-height: 1;
}

.add-icon {
  width: 40px;
  height: 40px;
  background: var(--gradient-accent);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-top: -12px;
  box-shadow: 0 4px 16px rgba(0, 212, 170, 0.3);
}

.tab-label {
  font-size: 0.65rem;
  font-weight: 600;
  letter-spacing: 0.3px;
}

/* ============================
   Extracted Card Styles
   ============================ */
.extracted-card {
  border-color: rgba(0, 212, 170, 0.25);
  animation: slideUp 0.35s ease;
}

/* ============================
   Scrollbar (Webkit)
   ============================ */
::-webkit-scrollbar {
  width: 4px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--border-card);
  border-radius: 4px;
}

/* ============================
   Selection
   ============================ */
::selection {
  background: rgba(0, 212, 170, 0.3);
  color: var(--text-primary);
}