/* ===== GLOBAL STYLES ===== */
:root[data-theme="light"] {
  --bg-color: #f5f5f5;
  --card-bg: #ffffff;
  --text-color: #333333;
  --border-color: #e0e0e0;
  --modal-backdrop: rgba(0, 0, 0, 0.5);
  --loading-backdrop: rgba(255, 255, 255, 0.8);
  --shadow-color: rgba(0, 0, 0, 0.1);

  --primary-color: #3498db;
  --primary-dark: #2980b9;
  --secondary-color: #2ecc71;
  --danger-color: #e74c3c;
  --text-color: #333333;
  --light-gray: #f5f5f5;
  --medium-gray: #e0e0e0;
  --dark-gray: #777777;
  --white: #ffffff;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  --border-radius: 8px;
  --transition: all 0.3s ease;
}

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

:root[data-theme="dark"] {
  --bg-color: #1a1a1a;
  --card-bg: #2d2d2d;
  --text-color: #e0e0e0;
  --border-color: #404040;
  --modal-backdrop: rgba(0, 0, 0, 0.7);
  --loading-backdrop: rgba(0, 0, 0, 0.8);
  --shadow-color: rgba(0, 0, 0, 0.3);
  --primary-color: #4dabf7;
  --primary-dark: #339af0;
  --secondary-color: #40c057;
  --danger-color: #fa5252;
  --light-gray: #2d2d2d;
  --medium-gray: #404040;
  --dark-gray: #909090;
  --white: #2d2d2d;
}

body {
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-color);
  padding: 0;
  margin: 0;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px;
}

/* ===== HEADER ===== */
header {
  background-color: var(--card-bg);
  box-shadow: var(--shadow);
  padding: 20px 0;
  margin-bottom: 30px;
}

header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.app-title {
  display: flex;
  align-items: center;
}

.app-title h1 {
  color: var(--primary-color);
  font-size: 2.2rem;
  margin: 0;
}

.app-title i {
  font-size: 2rem;
  margin-right: 15px;
  color: var(--primary-color);
}

/* ===== MAIN CONTENT ===== */
.main-content {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 30px;
}

@media (max-width: 768px) {
  .main-content {
    grid-template-columns: 1fr;
  }
}

/* ===== FORM PANEL ===== */
.form-panel {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 25px;
}

.form-panel h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
  font-size: 1.5rem;
  border-bottom: 2px solid var(--medium-gray);
  padding-bottom: 10px;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--text-color);
}

.form-control {
  width: 100%;
  padding: 12px;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.25);
}

.file-input-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
  width: 100%;
}

.file-input-label {
  display: block;
  background-color: var(--primary-color);
  color: var(--white);
  text-align: center;
  padding: 12px;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
}

.file-input-label:hover {
  background-color: var(--primary-dark);
}

.file-input-label i {
  margin-right: 8px;
}

.file-input {
  position: absolute;
  font-size: 100px;
  opacity: 0;
  right: 0;
  top: 0;
  cursor: pointer;
}

.file-name {
  margin-top: 8px;
  font-size: 0.9rem;
  color: var(--dark-gray);
  word-break: break-all;
}

.btn {
  display: inline-block;
  font-weight: 500;
  text-align: center;
  white-space: nowrap;
  vertical-align: middle;
  user-select: none;
  border: none;
  padding: 12px 25px;
  font-size: 1rem;
  line-height: 1.5;
  border-radius: var(--border-radius);
  transition: var(--transition);
  cursor: pointer;
  width: 100%;
}

.btn-primary {
  color: var(--white);
  background-color: var(--primary-color);
}

.btn-primary:hover {
  background-color: var(--primary-dark);
}

.btn-secondary {
  color: var(--white);
  background-color: var(--secondary-color);
}

.btn-secondary:hover {
  background-color: #27ae60;
}

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

.btn-danger:hover {
  background-color: #c0392b;
}

/* ===== WARRANTIES LIST ===== */
.warranties-panel {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 25px;
}

.warranties-panel h2 {
  color: var(--primary-color);
  margin-bottom: 20px;
  font-size: 1.5rem;
  border-bottom: 2px solid var(--medium-gray);
  padding-bottom: 10px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.refresh-btn {
  background: none;
  border: none;
  color: var(--primary-color);
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
}

.refresh-btn:hover {
  transform: rotate(90deg);
}

.search-box {
  margin-bottom: 20px;
  position: relative;
}

.search-box input {
  width: 100%;
  padding: 12px 15px 12px 40px;
  border: 1px solid var(--medium-gray);
  border-radius: var(--border-radius);
  font-size: 1rem;
  transition: var(--transition);
}

.search-box input:focus {
  outline: none;
  border-color: var(--primary-color);
  box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.25);
}

.search-box i {
  position: absolute;
  left: 15px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--dark-gray);
}

.warranties-list {
  max-height: 600px;
  overflow-y: auto;
}

.warranty-card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
  padding: 15px;
  margin-bottom: 15px;
  transition: var(--transition);
  border-left: 4px solid var(--primary-color);
  position: relative;
}

.warranty-card:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transform: translateY(-2px);
}

.warranty-card.expired {
  border-left-color: var(--danger-color);
}

.warranty-card.expiring-soon {
  border-left-color: #f39c12;
}

.warranty-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 10px;
}

.warranty-title {
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-color);
  margin: 0;
}

.warranty-actions {
  display: flex;
  gap: 10px;
}

.action-btn {
  background: none;
  border: none;
  font-size: 1rem;
  cursor: pointer;
  color: var(--dark-gray);
  transition: var(--transition);
}

.edit-btn:hover {
  color: var(--primary-color);
}

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

.warranty-details {
  color: var(--dark-gray);
  font-size: 0.9rem;
}

.warranty-details div {
  margin-bottom: 5px;
}

.warranty-details span {
  font-weight: 500;
  color: var(--text-color);
}

.warranty-status {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-top: 10px;
}

.status-active {
  background-color: rgba(46, 204, 113, 0.15);
  color: #27ae60;
}

.status-expired {
  background-color: rgba(231, 76, 60, 0.15);
  color: #c0392b;
}

.status-expiring {
  background-color: rgba(243, 156, 18, 0.15);
  color: #d35400;
}

.invoice-link {
  display: inline-flex;
  align-items: center;
  color: var(--primary-color);
  text-decoration: none;
  font-weight: 500;
  margin-top: 10px;
  transition: var(--transition);
}

.invoice-link i {
  margin-right: 5px;
}

.invoice-link:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

/* ===== MODAL ===== */
.modal-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--modal-backdrop);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.modal {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  width: 90%;
  max-width: 500px;
  transform: translateY(-20px);
  transition: var(--transition);
}

.modal-backdrop.active .modal {
  transform: translateY(0);
}

.modal-header {
  padding: 20px;
  border-bottom: 1px solid var(--medium-gray);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.modal-title {
  font-size: 1.2rem;
  color: var(--text-color);
  margin: 0;
}

.close-btn {
  background: none;
  border: none;
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
  color: var(--dark-gray);
  transition: var(--transition);
}

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

.modal-body {
  padding: 20px;
}

.modal-footer {
  padding: 15px 20px;
  border-top: 1px solid var(--medium-gray);
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}

.modal-footer .btn {
  width: auto;
}

/* ===== TOAST NOTIFICATIONS ===== */
.toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 1001;
}

.toast {
  min-width: 250px;
  margin-bottom: 10px;
  padding: 15px 20px;
  border-radius: var(--border-radius);
  box-shadow: 0 3px 10px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  justify-content: space-between;
  animation: slide-in 0.3s ease, fade-out 0.3s ease 2.7s forwards;
}

@keyframes slide-in {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

@keyframes fade-out {
  from { opacity: 1; }
  to { opacity: 0; }
}

.toast-success {
  background-color: var(--secondary-color);
  color: var(--white);
}

.toast-error {
  background-color: var(--danger-color);
  color: var(--white);
}

.toast-warning {
  background-color: #f39c12;
  color: var(--white);
}

.toast-info {
  background-color: var(--primary-color);
  color: var(--white);
}

.toast-close {
  background: none;
  border: none;
  color: var(--white);
  opacity: 0.7;
  cursor: pointer;
  font-size: 1.2rem;
  transition: var(--transition);
}

.toast-close:hover {
  opacity: 1;
}

/* ===== LOADING SPINNER ===== */
.loading-spinner {
  display: inline-block;
  position: relative;
  width: 80px;
  height: 80px;
}

.loading-spinner:after {
  content: " ";
  display: block;
  border-radius: 50%;
  width: 0;
  height: 0;
  margin: 8px;
  box-sizing: border-box;
  border: 32px solid var(--primary-color);
  border-color: var(--primary-color) transparent var(--primary-color) transparent;
  animation: loading-spinner 1.2s infinite;
}

@keyframes loading-spinner {
  0% { transform: rotate(0); animation-timing-function: cubic-bezier(0.55, 0.055, 0.675, 0.19); }
  50% { transform: rotate(180deg); animation-timing-function: cubic-bezier(0.215, 0.61, 0.355, 1); }
  100% { transform: rotate(360deg); }
}

.loading-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--loading-backdrop);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1002;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.loading-container.active {
  opacity: 1;
  visibility: visible;
}

/* ===== EMPTY STATE ===== */
.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--dark-gray);
}

.empty-state i {
  font-size: 3rem;
  margin-bottom: 15px;
  opacity: 0.3;
}

.empty-state h3 {
  font-size: 1.2rem;
  margin-bottom: 10px;
}

.empty-state p {
  font-size: 0.9rem;
}

/* ===== RESPONSIVE ADJUSTMENTS ===== */
@media (max-width: 768px) {
  .main-content {
    grid-template-columns: 1fr;
  }
  
  .form-panel, .warranties-panel {
    margin-bottom: 20px;
  }
  
  .warranty-header {
    flex-direction: column;
  }
  
  .warranty-actions {
    margin-top: 10px;
  }
}

/* ===== SETTINGS MENU ===== */
.settings-container {
  position: relative;
  z-index: 100;
}

.settings-btn {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--primary-color);
  font-size: 1.2rem;
  cursor: pointer;
  transition: var(--transition);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
}

.settings-btn:hover {
  transform: rotate(30deg);
  background-color: var(--primary-color);
  color: var(--white);
}

.settings-menu {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  padding: 15px;
  min-width: 220px;
  z-index: 100;
  display: none;
  border: 1px solid var(--border-color);
}

.settings-menu.active {
  display: block;
  animation: slide-in-top 0.3s forwards;
}

@keyframes slide-in-top {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.settings-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--border-color);
}

.settings-item:last-child {
  border-bottom: none;
}

.settings-item span {
  font-weight: 500;
  color: var(--text-color);
}

/* Toggle Switch */
.toggle-switch {
  position: relative;
  display: inline-block;
  width: 50px;
  height: 24px;
  margin-left: 10px;
}

.toggle-switch input {
  opacity: 0;
  width: 0;
  height: 0;
}

.toggle-slider {
  position: absolute;
  cursor: pointer;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--medium-gray);
  transition: var(--transition);
  border-radius: 34px;
  box-shadow: inset 0 0 5px rgba(0, 0, 0, 0.2);
}

.toggle-slider:before {
  position: absolute;
  content: "";
  height: 16px;
  width: 16px;
  left: 4px;
  bottom: 4px;
  background-color: var(--white);
  transition: var(--transition);
  border-radius: 50%;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

input:checked + .toggle-slider {
  background-color: var(--primary-color);
}

input:checked + .toggle-slider:before {
  transform: translateX(26px);
}

.toggle-slider:after {
  content: '☀️';
  position: absolute;
  top: 3px;
  left: 6px;
  font-size: 12px;
  color: var(--white);
  opacity: 0.7;
  transition: var(--transition);
}

input:checked + .toggle-slider:after {
  content: '🌙';
  left: auto;
  right: 6px;
}

/* ===== UTILITIES ===== */
.text-danger {
  color: var(--danger-color);
}

.text-warning {
  color: #f39c12;
}

.text-success {
  color: var(--secondary-color);
}

.text-center {
  text-align: center;
}

.mt-10 {
  margin-top: 10px;
}

.mt-20 {
  margin-top: 20px;
}

.mb-10 {
  margin-bottom: 10px;
}

.mb-20 {
  margin-bottom: 20px;
}