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

html,
body {
  width: 100%;
  min-height: 100vh;
}

html {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen,
    Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;
  background-color: var(--bg-primary-color);
  color: var(--text-primary-color);
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* Header */
header {
  background: linear-gradient(
    135deg,
    var(--gradient-start),
    var(--gradient-end)
  );
  padding: var(--padding-lg) var(--padding-xl);
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
  backdrop-filter: blur(10px);
}

.header-content {
  max-width: 1600px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--gutter-sm);
}

.logo i {
  font-size: 2rem;
  color: var(--accent-color);
}

.logo h1 {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  background: linear-gradient(
    135deg,
    var(--accent-color),
    var(--accent-secondary)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.header-actions {
  display: flex;
  gap: var(--gutter-sm);
}

/* Main */
main {
  width: 100%;
  max-width: 1600px;
  margin: 0 auto;
}

main section {
  width: 100%;
  padding: var(--padding-xl);
  display: flex;
  gap: var(--gutter-xl);
}

/* Buttons */
.btn {
  padding: var(--padding-md) var(--padding-lg);
  border: none;
  outline: none;
  border-radius: var(--border-radius-md);
  background-color: var(--bg-active-color);
  cursor: pointer;
  color: var(--text-active-color);
  font-weight: 600;
  font-size: var(--font-size-sm);
  transition: all 0.3s ease;
  display: inline-flex;
  align-items: center;
  gap: var(--gutter-xs);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

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

.btn-icon {
  padding: var(--padding-sm);
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
}

.btn-icon i {
  font-size: 1.25rem;
}

.btn-sm {
  padding: var(--padding-xs) var(--padding-sm);
  font-size: 0.8rem;
}

.btn-primary {
  background: linear-gradient(
    135deg,
    var(--accent-color),
    var(--accent-secondary)
  );
  color: white;
}

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

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

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

/* Left Panel */
main section .left {
  display: flex;
  flex-direction: column;
  gap: var(--gutter-lg);
  width: 70%;
}

main section .top {
  display: flex;
  align-items: center;
  gap: var(--gutter-md);
  flex-wrap: wrap;
}

main section .bottom {
  background-color: var(--bg-secondary-color);
  width: 100%;
  padding: var(--padding-2xl);
  min-height: 500px;
  border-radius: var(--border-radius-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  border: 2px dashed var(--border-color);
  transition: all 0.3s ease;
}

main section .bottom:hover {
  border-color: var(--accent-color);
}

.placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--gutter-md);
  text-align: center;
  animation: fadeIn 0.5s ease;
}

.placeholder i {
  font-size: 6rem;
  color: var(--accent-color);
  opacity: 0.6;
}

.placeholder p {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--text-primary-color);
}

.placeholder span {
  font-size: var(--font-size-sm);
  color: var(--text-secondary-color);
}

.canvas-container {
  display: none;
  position: relative;
  width: 100%;
  height: 100%;
  align-items: center;
  justify-content: center;
}

canvas {
  max-height: 70vh;
  max-width: 100%;
  border-radius: var(--border-radius-md);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
  animation: fadeIn 0.5s ease;
}

.zoom-controls {
  position: absolute;
  bottom: var(--padding-md);
  right: var(--padding-md);
  background-color: var(--bg-tertiary-color);
  padding: var(--padding-sm);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  gap: var(--gutter-sm);
  backdrop-filter: blur(10px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

#zoom-level {
  font-size: var(--font-size-sm);
  font-weight: 600;
  min-width: 50px;
  text-align: center;
}

/* Right Panel */
main section .right {
  width: 30%;
  background-color: var(--bg-secondary-color);
  padding: var(--padding-lg);
  border-radius: var(--border-radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--gutter-lg);
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
  max-height: calc(100vh - 150px);
  overflow-y: auto;
  position: sticky;
  top: 100px;
}

/* Custom Scrollbar */
main section .right::-webkit-scrollbar {
  width: 8px;
}

main section .right::-webkit-scrollbar-track {
  background: var(--bg-tertiary-color);
  border-radius: var(--border-radius-sm);
}

main section .right::-webkit-scrollbar-thumb {
  background: var(--accent-color);
  border-radius: var(--border-radius-sm);
}

/* Tabs */
.tabs {
  display: flex;
  gap: var(--gutter-xs);
  background-color: var(--bg-tertiary-color);
  padding: var(--padding-xs);
  border-radius: var(--border-radius-md);
}

.tab-btn {
  flex: 1;
  padding: var(--padding-sm) var(--padding-md);
  background-color: transparent;
  border: none;
  border-radius: var(--border-radius-sm);
  color: var(--text-secondary-color);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--gutter-xs);
  font-weight: 600;
  font-size: var(--font-size-sm);
}

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

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

.tab-content {
  display: none;
  animation: fadeIn 0.3s ease;
}

.tab-content.active {
  display: flex;
  flex-direction: column;
  gap: var(--gutter-lg);
}

/* Section Header */
.section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding-bottom: var(--padding-md);
  border-bottom: 2px solid var(--border-color);
}

.section-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 700;
}

.subtitle {
  font-size: var(--font-size-sm);
  color: var(--text-secondary-color);
}

/* Filters */
.filters {
  display: flex;
  flex-direction: column;
  gap: var(--gutter-lg);
}

.filter {
  width: 100%;
  padding: var(--padding-md);
  background-color: var(--bg-tertiary-color);
  border-radius: var(--border-radius-md);
  transition: all 0.3s ease;
}

.filter:hover {
  transform: translateX(4px);
  box-shadow: -4px 0 0 var(--accent-color);
}

.filter p {
  font-weight: 600;
  font-size: var(--font-size-md);
  margin-bottom: var(--margin-sm);
  color: var(--text-primary-color);
}

.filter input[type="range"] {
  width: 100%;
  outline: none;
  appearance: none;
  height: 4px;
  background: linear-gradient(
    to right,
    var(--accent-color) 0%,
    var(--bg-active-color) 0%
  );
  border-radius: var(--border-radius-xs);
  cursor: pointer;
}

.filter input[type="range"]::-webkit-slider-thumb {
  appearance: none;
  height: 18px;
  width: 18px;
  border-radius: 50%;
  background-color: var(--accent-color);
  cursor: pointer;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
  transition: all 0.3s ease;
}

.filter input[type="range"]::-webkit-slider-thumb:hover {
  transform: scale(1.2);
  box-shadow: 0 0 0 8px rgba(99, 102, 241, 0.1);
}

.filter input[type="range"]::-moz-range-thumb {
  height: 18px;
  width: 18px;
  border-radius: 50%;
  background-color: var(--accent-color);
  cursor: pointer;
  border: none;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

/* Presets */
.presets-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
  gap: var(--gutter-md);
}

.preset-btn {
  padding: var(--padding-md);
  background: linear-gradient(
    135deg,
    var(--bg-tertiary-color),
    var(--bg-secondary-color)
  );
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  color: var(--text-primary-color);
  font-weight: 600;
  text-transform: capitalize;
  position: relative;
  overflow: hidden;
}

.preset-btn::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    90deg,
    transparent,
    rgba(255, 255, 255, 0.1),
    transparent
  );
  transition: left 0.5s ease;
}

.preset-btn:hover::before {
  left: 100%;
}

.preset-btn:hover {
  border-color: var(--accent-color);
  transform: translateY(-4px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
}

.preset-btn:active {
  transform: translateY(-2px);
}

/* Adjustments */
.adjustments {
  display: flex;
  flex-direction: column;
  gap: var(--gutter-lg);
}

.adjustment-group {
  padding: var(--padding-md);
  background-color: var(--bg-tertiary-color);
  border-radius: var(--border-radius-md);
}

.adjustment-group h3 {
  font-size: var(--font-size-lg);
  margin-bottom: var(--margin-md);
  color: var(--accent-color);
}

.transform-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--gutter-sm);
}

.quality-selector {
  display: flex;
  flex-direction: column;
  gap: var(--gutter-sm);
}

.quality-selector label {
  font-weight: 600;
  font-size: var(--font-size-sm);
}

.custom-select {
  padding: var(--padding-sm) var(--padding-md);
  background-color: var(--bg-secondary-color);
  color: var(--text-primary-color);
  border: 2px solid var(--border-color);
  border-radius: var(--border-radius-sm);
  outline: none;
  cursor: pointer;
  font-size: var(--font-size-sm);
  transition: all 0.3s ease;
}

.custom-select:hover,
.custom-select:focus {
  border-color: var(--accent-color);
}

/* Toast Notification */
.toast {
  position: fixed;
  bottom: -100px;
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--bg-success-color);
  color: white;
  padding: var(--padding-md) var(--padding-xl);
  border-radius: var(--border-radius-md);
  display: flex;
  align-items: center;
  gap: var(--gutter-sm);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
  z-index: 1000;
  transition: bottom 0.3s ease;
  font-weight: 600;
}

.toast.show {
  bottom: var(--padding-xl);
}

.toast i {
  font-size: 1.5rem;
}

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

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

/* Responsive */
@media (max-width: 1024px) {
  main section {
    flex-direction: column;
  }

  main section .left,
  main section .right {
    width: 100%;
  }

  main section .right {
    position: relative;
    top: 0;
    max-height: none;
  }

  .presets-grid {
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  }
}

@media (max-width: 768px) {
  header {
    padding: var(--padding-md);
  }

  .logo h1 {
    font-size: var(--font-size-xl);
  }

  main section {
    padding: var(--padding-md);
  }

  .transform-buttons {
    grid-template-columns: 1fr;
  }

  .tabs {
    flex-direction: column;
  }
}