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

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

:root {
  --primary: #0ea5e9;
  --primary-light: #38bdf8;
  --primary-dark: #0284c7;
  --primary-glow: rgba(14, 165, 233, 0.15);
  --accent: #06b6d4;
  --accent-light: #22d3ee;

  --bg-deep: #06090f;
  --bg: #0b1121;
  --bg-elevated: #111a2e;
  --bg-card: #15203a;
  --bg-card-hover: #1a2744;
  --bg-surface: #1e2d4a;

  --border: rgba(56, 189, 248, 0.08);
  --border-hover: rgba(56, 189, 248, 0.18);
  --border-active: rgba(14, 165, 233, 0.4);

  --text: #f1f5f9;
  --text-secondary: #94a3b8;
  --text-muted: #64748b;
  --text-dim: #475569;

  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;

  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.5);
  --shadow-glow: 0 0 30px rgba(14, 165, 233, 0.1);

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;

  --transition: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  background: var(--bg-deep);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   LAYOUT
   ============================================ */

.app {
  display: flex;
  min-height: 100vh;
}

/* ============================================
   SIDEBAR
   ============================================ */

.sidebar {
  width: 280px;
  background: var(--bg);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  position: fixed;
  height: 100vh;
  z-index: 100;
  backdrop-filter: blur(20px);
}

.sidebar::before {
  content: '';
  position: absolute;
  top: 0;
  right: 0;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-glow), transparent 30%, transparent 70%, var(--primary-glow));
}

.logo {
  padding: 1.75rem 1.5rem;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.logo::after {
  content: '';
  position: absolute;
  bottom: -1px;
  left: 1.5rem;
  right: 1.5rem;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--primary), transparent);
  opacity: 0.3;
}

.logo h1 {
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-light));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav {
  flex: 1;
  padding: 0.75rem 0;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: var(--border) transparent;
}

.nav::-webkit-scrollbar {
  width: 4px;
}
.nav::-webkit-scrollbar-thumb {
  background: var(--border-hover);
  border-radius: 4px;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.7rem 1.5rem;
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 450;
  transition: all var(--transition);
  position: relative;
  margin: 0 0.5rem;
  border-radius: var(--radius-sm);
}

.nav-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 0;
  background: var(--primary);
  border-radius: 0 3px 3px 0;
  transition: height var(--transition);
}

.nav-item:hover {
  background: var(--primary-glow);
  color: var(--text-secondary);
}

.nav-item.active {
  background: var(--primary-glow);
  color: var(--primary-light);
  font-weight: 500;
}

.nav-item.active::before {
  height: 60%;
}

.tscontact {
  font-weight: 600;
}

.nav-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 6px currentColor;
}

.badge {
  margin-left: auto;
  background: var(--primary);
  color: white;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 0.15rem 0.55rem;
  border-radius: 20px;
  letter-spacing: 0.02em;
}

.sidebar-footer {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--border);
}

.btn-manage {
  display: block;
  text-align: center;
  padding: 0.65rem;
  background: transparent;
  border: 1px solid var(--border-hover);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.8125rem;
  font-weight: 500;
  transition: all var(--transition);
  letter-spacing: 0.01em;
}

.btn-manage:hover {
  border-color: var(--primary);
  color: var(--primary-light);
  background: var(--primary-glow);
  box-shadow: var(--shadow-glow);
}

/* ============================================
   MAIN CONTENT
   ============================================ */

.main {
  flex: 1;
  margin-left: 280px;
  padding: 2rem 2.5rem;
  background: var(--bg-deep);
  min-height: 100vh;
}

.main::before {
  content: '';
  position: fixed;
  top: 0;
  left: 280px;
  right: 0;
  height: 200px;
  background: radial-gradient(ellipse at 50% 0%, rgba(14, 165, 233, 0.04) 0%, transparent 70%);
  pointer-events: none;
  z-index: 0;
}

/* ============================================
   TOP BAR
   ============================================ */

.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.search-box {
  display: flex;
  gap: 0;
  position: relative;
}

.search-box input {
  width: 320px;
  padding: 0.7rem 1rem;
  border: 1px solid var(--border);
  border-right: none;
  border-radius: var(--radius-md) 0 0 var(--radius-md);
  background: var(--bg-elevated);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  transition: all var(--transition);
}

.search-box input::placeholder {
  color: var(--text-dim);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary);
  background: var(--bg-card);
  box-shadow: 0 0 0 3px var(--primary-glow);
}

.search-box button {
  padding: 0.7rem 1rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-left: none;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  font-size: 0.875rem;
}

.search-box input:focus + button {
  border-color: var(--primary);
}

.btn-primary {
  padding: 0.7rem 1.5rem;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-weight: 600;
  font-size: 0.875rem;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.1));
  opacity: 0;
  transition: opacity var(--transition);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

.btn-primary:hover::before {
  opacity: 1;
}

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

/* ============================================
   STATS BAR
   ============================================ */

.stats-bar {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
  position: relative;
  z-index: 1;
}

.stat-item {
  flex: 1;
  text-align: center;
  padding: 1.25rem 1.5rem;
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: opacity var(--transition);
}

.stat-item:hover {
  border-color: var(--border-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.stat-item:hover::before {
  opacity: 1;
}

.stat-value {
  display: block;
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-light);
  letter-spacing: -0.02em;
  line-height: 1.2;
}

.stat-label {
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-top: 0.25rem;
}

/* ============================================
   CONTACTS GRID
   ============================================ */

.contacts-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.contact-card {
  background: var(--bg-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  transition: all var(--transition-slow);
  position: relative;
  overflow: hidden;
}

.contact-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary-glow), transparent 60%);
  opacity: 0;
  transition: opacity var(--transition-slow);
}

.contact-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.contact-card:hover::before {
  opacity: 1;
}

.contact-avatar {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: white;
  letter-spacing: 0.02em;
  position: relative;
  z-index: 1;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.contact-info {
  position: relative;
  z-index: 1;
}

.contact-info h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  letter-spacing: -0.01em;
  color: var(--text);
}

.contact-company {
  color: var(--primary-light);
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 0.15rem;
}

.contact-email,
.contact-phone {
  color: var(--text-muted);
  font-size: 0.8125rem;
  line-height: 1.6;
}

.contact-tag {
  display: inline-block;
  padding: 0.2rem 0.65rem;
  border-radius: 20px;
  font-size: 0.7rem;
  font-weight: 600;
  width: fit-content;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  position: relative;
  z-index: 1;
}

.contact-actions {
  display: flex;
  gap: 0.4rem;
  position: absolute;
  top: 1rem;
  right: 1rem;
  opacity: 0;
  transition: opacity var(--transition);
  z-index: 2;
}

.contact-card:hover .contact-actions {
  opacity: 1;
}

.btn-icon {
  padding: 0.4rem 0.5rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  font-size: 0.8rem;
  transition: all var(--transition);
  display: flex;
  align-items: center;
}

.btn-icon:hover {
  background: var(--bg-surface);
  border-color: var(--border-hover);
  transform: scale(1.05);
}

.empty-state {
  grid-column: 1 / -1;
  text-align: center;
  color: var(--text-dim);
  padding: 4rem 2rem;
  font-size: 0.9375rem;
  font-weight: 400;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(6, 9, 15, 0.85);
  backdrop-filter: blur(8px);
  justify-content: center;
  align-items: center;
  z-index: 1000;
}

.modal.active {
  display: flex;
  animation: modalFadeIn 0.25s ease-out;
}

@keyframes modalFadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}

.modal-content {
  background: var(--bg-card);
  padding: 2rem;
  border-radius: var(--radius-xl);
  width: 90%;
  max-width: 520px;
  position: relative;
  border: 1px solid var(--border-hover);
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--shadow-lg), 0 0 60px rgba(14, 165, 233, 0.05);
  animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
  from {
    transform: translateY(20px) scale(0.97);
    opacity: 0;
  }
  to {
    transform: translateY(0) scale(1);
    opacity: 1;
  }
}

.modal-close {
  position: absolute;
  top: 1rem;
  right: 1.25rem;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text-dim);
  transition: color var(--transition);
  line-height: 1;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
}

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

.modal-content h2 {
  margin-bottom: 1.75rem;
  font-size: 1.25rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

/* ============================================
   FORMS
   ============================================ */

.form-group {
  margin-bottom: 1.125rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.4rem;
  color: var(--text-secondary);
  font-size: 0.8125rem;
  font-weight: 500;
  letter-spacing: 0.01em;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.7rem 0.875rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  background: var(--bg);
  color: var(--text);
  font-size: 0.875rem;
  font-family: inherit;
  transition: all var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--text-dim);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-elevated);
}

.form-group select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' fill='%2394a3b8' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.875rem center;
  padding-right: 2.5rem;
}

.form-group textarea {
  resize: vertical;
  min-height: 80px;
}

.form-row {
  display: flex;
  gap: 1rem;
}

.form-row .form-group {
  flex: 1;
}

.btn-submit {
  width: 100%;
  padding: 0.8rem;
  background: var(--primary);
  border: none;
  border-radius: var(--radius-md);
  color: white;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: all var(--transition);
  letter-spacing: 0.01em;
  margin-top: 0.5rem;
}

.btn-submit:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 20px rgba(14, 165, 233, 0.3);
  transform: translateY(-1px);
}

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

/* ============================================
   EDIT PAGE
   ============================================ */

.container-centered {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  background: var(--bg-deep);
}

.edit-card {
  background: var(--bg-elevated);
  padding: 2.5rem;
  border-radius: var(--radius-xl);
  width: 100%;
  max-width: 600px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-lg);
}

.edit-header {
  margin-bottom: 2rem;
}

.back-link {
  color: var(--primary-light);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  margin-bottom: 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  transition: color var(--transition);
}

.back-link:hover {
  color: var(--accent-light);
}

.edit-header h1 {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.form-actions {
  display: flex;
  gap: 0.75rem;
  margin-top: 1.75rem;
}

.btn-secondary {
  flex: 1;
  padding: 0.8rem;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-muted);
  text-decoration: none;
  text-align: center;
  font-size: 0.9rem;
  font-weight: 500;
  font-family: inherit;
  transition: all var(--transition);
}

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

.form-actions .btn-submit {
  flex: 1;
  width: auto;
  margin-top: 0;
}

/* ============================================
   CATEGORIES PAGE
   ============================================ */

.add-category-form {
  margin-bottom: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--border);
}

.add-category-form .form-row {
  align-items: flex-end;
}

.color-picker {
  width: 46px !important;
  height: 42px;
  padding: 2px !important;
  border: 1px solid var(--border) !important;
  border-radius: var(--radius-sm) !important;
  cursor: pointer;
  background: var(--bg) !important;
}

.categories-list {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.category-item {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  padding: 0.875rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

.category-item:hover {
  border-color: var(--border-hover);
  background: var(--bg-elevated);
}

.category-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
  box-shadow: 0 0 8px currentColor;
}

.category-name {
  flex: 1;
  font-weight: 500;
  font-size: 0.9rem;
}

.category-count {
  color: var(--text-dim);
  font-size: 0.8125rem;
}

.delete-form {
  display: inline;
}

.btn-delete-small {
  width: 28px;
  height: 28px;
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid rgba(239, 68, 68, 0.15);
  border-radius: var(--radius-sm);
  color: #f87171;
  font-size: 1.1rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  line-height: 1;
}

.btn-delete-small:hover {
  background: var(--danger);
  border-color: var(--danger);
  color: white;
  box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 1024px) {
  .main {
    padding: 1.5rem;
  }

  .search-box input {
    width: 240px;
  }
}

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

  .main {
    margin-left: 0;
    padding: 1.25rem;
  }

  .main::before {
    left: 0;
  }

  .topbar {
    flex-direction: column;
    gap: 0.75rem;
  }

  .search-box {
    width: 100%;
  }

  .search-box input {
    width: 100%;
  }

  .btn-primary {
    width: 100%;
  }

  .stats-bar {
    flex-wrap: wrap;
  }

  .stat-item {
    min-width: 0;
  }

  .contacts-grid {
    grid-template-columns: 1fr;
  }

  .form-row {
    flex-direction: column;
    gap: 0;
  }

  .edit-card {
    padding: 1.5rem;
  }
}