/* --- Font Imports --- */
@import url("https://fonts.googleapis.com/css2?family=Vazir:wght@400;500;600;700&display=swap");

/* --- CSS Reset & Defensive Styles --- */
:root {
  --primary: #dc2626;
  --primary-dark: #b91c1c;
  --primary-light: #ef4444;
  --secondary: #f97316;
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #dc2626;
  --dark: #1f2937;
  --gray: #6b7280;
  --light-gray: #f3f4f6;
  --white: #ffffff;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --radius: 12px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Vazir", "Inter", sans-serif;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  min-height: 100vh;
  color: var(--dark);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- Main Layout --- */
.main-container {
  max-width: 1400px;
  width: 100%; /* اضافه شدن برای جلوگیری از کوچک شدن */
  margin: 0 auto;
  padding: 1rem;
}

/* --- Page Header --- */
.page-header {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}

.page-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex: 1;
}

.page-title i {
  color: var(--primary);
}

/* --- Statistics Cards --- */
.stats-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
  margin-bottom: 2rem;
}

.stat-card {
  background: var(--white);
  border-radius: 20px;
  padding: 2rem 1.5rem;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  position: relative;
  overflow: hidden;
  opacity: 0;
  transform: translateY(30px) scale(0.9);
}

.stat-card.visible {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.stat-card::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.1) 0%,
    rgba(255, 255, 255, 0) 70%
  );
  opacity: 0;
  transition: opacity 0.4s ease;
}

.stat-card:hover::before {
  opacity: 1;
}
.stat-card:hover {
  transform: translateY(-10px) scale(1.03);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.stat-card.primary:hover {
  box-shadow: 0 20px 40px rgba(220, 38, 38, 0.25);
}
.stat-card.success:hover {
  box-shadow: 0 20px 40px rgba(16, 185, 129, 0.25);
}
.stat-card.warning:hover {
  box-shadow: 0 20px 40px rgba(245, 158, 11, 0.25);
}
.stat-card.danger:hover {
  box-shadow: 0 20px 40px rgba(239, 68, 68, 0.25);
}

.stat-icon {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  margin-bottom: 1.5rem;
  transition: all 0.4s ease;
  position: relative;
  z-index: 1;
}

.stat-card:hover .stat-icon {
  transform: scale(1.1);
  filter: drop-shadow(0 0 10px rgba(0, 0, 0, 0.2));
}

.stat-card.primary .stat-icon {
  background: linear-gradient(
    135deg,
    var(--primary-light),
    var(--primary-dark)
  );
  color: var(--white);
}
.stat-card.success .stat-icon {
  background: linear-gradient(135deg, #34d399, var(--success));
  color: var(--white);
}
.stat-card.warning .stat-icon {
  background: linear-gradient(135deg, #fbbf24, var(--warning));
  color: var(--white);
}
.stat-card.danger .stat-icon {
  background: linear-gradient(135deg, #f87171, var(--danger));
  color: var(--white);
}

.stat-content {
  position: relative;
  z-index: 1;
}
.stat-value {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--dark);
  line-height: 1;
  margin-bottom: 0.5rem;
  transition: all 0.3s ease;
}
.stat-card:hover .stat-value {
  transform: scale(1.05);
}
.stat-label {
  color: var(--gray);
  font-size: 0.95rem;
  font-weight: 500;
}

/* --- Content Sections --- */
.content-section {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.5rem;
  box-shadow: var(--shadow);
}

.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--light-gray);
  flex-wrap: wrap;
  gap: 0.75rem;
}

.section-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex: 1;
}

.section-title i {
  color: var(--primary);
}

/* --- Buttons --- */
.btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius);
  font-weight: 600;
  font-size: 0.9rem;
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  white-space: nowrap;
  min-height: 44px;
  text-decoration: none;
}
.btn-primary {
  background: var(--primary);
  color: var(--white);
}
.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
}
.btn-secondary {
  background: var(--light-gray);
  color: var(--dark);
  border: 1px solid #ddd;
}
.btn-secondary:hover {
  background: #e5e7eb;
}
.btn-success {
  background: var(--success);
  color: var(--white);
}
.btn-success:hover {
  background: #059669;
}
.btn-warning {
  background: var(--warning);
  color: var(--white);
}
.btn-warning:hover {
  background: #d97706;
}
.btn-danger {
  background: var(--danger);
  color: var(--white);
}
.btn-danger:hover {
  background: #b91c1c;
}

/* --- Forms --- */
.form-container {
  display: none;
}
.form-container.active {
  display: block;
}
.form-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1rem;
  margin-bottom: 1.25rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.form-label {
  font-weight: 500;
  color: var(--dark);
  font-size: 0.9rem;
}
.form-input {
  padding: 0.75rem;
  border: 1px solid #e5e7eb;
  border-radius: var(--radius);
  font-size: 0.95rem;
  transition: var(--transition);
  background: var(--white);
  min-height: 44px;
  font-family: "Vazir", sans-serif;
}
.form-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.1);
}

/* --- Filters --- */
.filters-wrapper {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
  padding: 1.25rem;
  background-color: #f8f9fa;
  border: 1px solid #e9ecef;
  border-radius: 8px;
}
.search-bar {
  position: relative;
}
.search-bar .fas {
  position: absolute;
  inset-inline-start: 1rem;
  top: 50%;
  transform: translateY(-50%);
  color: #6c757d;
}
.search-input {
  width: 100%;
  padding-block: 0.75rem;
  padding-inline-start: 2.75rem;
  padding-inline-end: 1rem;
  font-family: "Vazir", sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: #343a40;
  border: 1px solid #ced4da;
  border-radius: 4px;
  background-color: var(--white);
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.search-input::placeholder {
  color: #6c757d;
  font-weight: 400;
}
.search-input:focus {
  border-color: var(--primary);
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(220, 38, 38, 0.25);
}
.filters-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1rem;
}
.custom-select {
  display: block;
  width: 100%;
  padding: 0.75rem 2.5rem 0.75rem 1rem;
  font-family: "Vazir", sans-serif;
  font-size: 0.95rem;
  font-weight: 500;
  color: #343a40;
  line-height: 1.5;
  background-color: var(--white);
  background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: left 0.75rem center;
  background-size: 16px 12px;
  border: 1px solid #ced4da;
  border-radius: 4px;
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}
.custom-select:focus {
  border-color: var(--primary);
  outline: 0;
  box-shadow: 0 0 0 0.2rem rgba(220, 38, 38, 0.25);
}

/* --- Client Cards Grid (CRITICAL FIX) --- */
.clients-grid {
  display: grid;
  /* این خط اصلی‌ترین دلیل مشکل بود. حالا بسیار محکم شده */
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 300px), 1fr));
  gap: 1rem;
}

.client-card-link {
  text-decoration: none;
  color: inherit;
  display: block;
  /* این خط جلوی overflow شدن محتوا رو میگیره */
  min-width: 0;
}

.client-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.25rem;
  box-shadow: var(--shadow);
  transition: var(--transition);
  border-top: 3px solid var(--primary);
  cursor: pointer;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.client-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-top-color: var(--primary-dark);
}
.client-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
  gap: 0.75rem;
}
.client-info {
  flex: 1;
}
.client-info h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--dark);
  margin-bottom: 0.25rem;
}
.client-info p {
  color: var(--gray);
  font-size: 0.9rem;
}
.client-status {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  align-items: flex-end;
  flex-shrink: 0;
}
.status-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  white-space: nowrap;
}
.status-active {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}
.status-inactive {
  background: rgba(220, 38, 38, 0.1);
  color: var(--danger);
}
.purchase-badge {
  padding: 0.25rem 0.75rem;
  border-radius: 20px;
  font-size: 0.8rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 0.25rem;
  white-space: nowrap;
}
.purchase-active {
  background: var(--primary);
  color: white;
}
.purchase-inactive {
  background: var(--gray);
  color: white;
}
.client-details {
  margin: 1rem 0;
  padding: 0.75rem 0;
  border-top: 1px solid var(--light-gray);
  border-bottom: 1px solid var(--light-gray);
}
.detail-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.5rem;
  font-size: 0.9rem;
  gap: 0.5rem;
}
.detail-label {
  color: var(--gray);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
}
.detail-label i {
  color: var(--primary);
}
.detail-value {
  color: var(--dark);
  font-weight: 500;
  text-align: left;
}
.client-meta {
  font-size: 0.8rem;
  color: var(--gray);
  margin-bottom: 1rem;
}
.view-details {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  color: var(--primary);
  font-weight: 500;
  padding: 0.5rem 0;
  transition: var(--transition);
}
.view-details:hover {
  color: var(--primary-dark);
}

/* --- Import Section --- */
.import-section {
  display: flex;
  gap: 0.75rem;
  align-items: center;
  flex-wrap: wrap;
}
.file-input-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
  flex: 1;
  min-width: 140px;
}
.file-input-wrapper input[type="file"] {
  position: absolute;
  left: -9999px;
}
.file-input-label {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--light-gray);
  color: var(--dark);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid #ddd;
  min-height: 44px;
}
.file-input-label:hover {
  background: #e5e7eb;
}

/* --- Loading, Modal, Toast, Empty State --- */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 9999;
}
.loading-overlay.active {
  display: flex;
}
.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top: 4px solid var(--primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}
@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  padding: 1rem;
}
.modal.active {
  display: flex;
}
.modal-content {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  max-width: 500px;
  width: 100%;
  box-shadow: var(--shadow-lg);
}
.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1.25rem;
}
.modal-title {
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--dark);
}
.modal-close {
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--gray);
}
.modal-close:hover {
  color: var(--dark);
}
.modal-body {
  margin-bottom: 1.25rem;
  color: var(--gray);
  font-size: 1rem;
}
.modal-footer {
  display: flex;
  gap: 0.75rem;
  justify-content: flex-end;
  flex-wrap: wrap;
}

.empty-state {
  text-align: center;
  padding: 2rem 1rem;
  color: var(--gray);
  grid-column: 1 / -1;
}
.empty-state i {
  font-size: 3rem;
  margin-bottom: 1rem;
  opacity: 0.5;
  color: var(--primary);
}
.empty-state p {
  font-size: 1rem;
}

.toast {
  position: fixed;
  bottom: 1rem;
  left: 50%;
  transform: translateX(-50%);
  padding: 0.75rem 1.25rem;
  border-radius: var(--radius);
  color: var(--white);
  font-weight: 500;
  box-shadow: var(--shadow-lg);
  z-index: 10000;
  display: none;
  text-align: center;
  font-size: 0.9rem;
}
.toast.show {
  display: block;
}
.toast.success {
  background: var(--success);
}
.toast.error {
  background: var(--danger);
}

/* --- Pagination --- */
.pagination-container {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.5rem;
  margin-top: 2rem;
  flex-wrap: wrap;
}
.pagination-btn {
  padding: 0.5rem 0.75rem;
  border: 1px solid var(--light-gray);
  background: var(--white);
  color: var(--dark);
  border-radius: var(--radius);
  cursor: pointer;
  transition: var(--transition);
  font-weight: 500;
  font-size: 0.9rem;
  min-width: 44px;
  min-height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.pagination-btn:hover:not(.active):not(:disabled) {
  background: var(--light-gray);
}
.pagination-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.pagination-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.pagination-info {
  color: var(--gray);
  font-size: 0.9rem;
  margin: 0 0.5rem;
}

/* --- Responsive Design (Robust) --- */
@media (max-width: 1024px) {
  .stats-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .main-container {
    padding: 0.75rem;
  }
  .page-header {
    flex-direction: column;
    text-align: center;
  }
  .stats-container {
    grid-template-columns: 1fr;
    gap: 1rem;
  }
  .form-grid {
    grid-template-columns: 1fr;
  }
  .filters-list {
    grid-template-columns: 1fr;
  }
  .clients-grid {
    grid-template-columns: 1fr;
  }
  .import-section {
    flex-direction: column;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 480px) {
  .page-header,
  .content-section {
    padding: 1rem;
  }
  .form-grid {
    gap: 0.75rem;
  }
  .client-card {
    padding: 1rem;
  }
  .client-header {
    flex-direction: column;
    align-items: flex-start;
  }
  .client-status {
    align-items: flex-start;
    margin-top: 0.5rem;
  }
  .detail-row {
    flex-direction: column;
    align-items: flex-start;
    gap: 0.25rem;
  }
  .detail-value {
    text-align: right;
  }
  .btn {
    padding: 0.625rem 1rem;
    font-size: 0.85rem;
  }
  .search-input {
    padding: 0.625rem 2.5rem 0.625rem 0.75rem;
  }
  .custom-select {
    padding: 0.625rem 2.25rem 0.625rem 0.75rem;
  }
  .pagination-btn {
    min-width: 36px;
    min-height: 36px;
    font-size: 0.85rem;
  }
  .modal-content {
    padding: 1rem;
  }
  .modal-header {
    margin-bottom: 1rem;
  }
  .modal-body {
    margin-bottom: 1rem;
  }
  .modal-footer {
    flex-direction: column;
  }
  .modal-footer .btn {
    width: 100%;
    justify-content: center;
  }
  .toast {
    bottom: 0.5rem;
    left: 0.5rem;
    right: 0.5rem;
    transform: none;
  }
}