frontend/src/App.css

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

/* ==================== LAYOUT & STRUCTURE ==================== */

.app-container {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg-gradient);
  color: var(--text-primary);
  font-family: var(--body-font);
  overflow-x: hidden;
}

.app-header {
  padding: 32px 20px;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.1));
  border-bottom: 1px solid var(--border-light);
  position: relative;
  animation: slideDown 600ms ease-out;
}

.header-content {
  max-width: 1200px;
  margin: 0 auto;
}

.logo-section {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.logo-icon {
  font-size: 28px;
  animation: float 3s ease-in-out infinite;
}

.app-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0;
  background: linear-gradient(135deg, #3b82f6, #8b5cf6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-image {
  width: 64px;
  height: 28px;
  border-radius: 8px;
  background:
    linear-gradient(90deg, rgba(17, 24, 39, 0.75) 0 50%, rgba(59, 130, 246, 0.35) 50% 100%);
  border: 1px solid rgba(59, 130, 246, 0.35);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.25);
  position: relative;
  overflow: hidden;
}

.brand-image::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: rgba(255, 255, 255, 0.65);
  transform: translateX(-1px);
}

.app-tagline {
  margin: 0;
  color: var(--text-secondary);
  font-size: 14px;
  font-weight: 500;
}

.app-shell {
  flex: 1;
  max-width: 1100px;
  width: 100%;
  margin: 0 auto;
  padding: 48px 24px;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

/* ==================== HERO SECTION ==================== */

.hero-section {
  text-align: center;
  animation: slideUp 600ms ease-out;
}

.hero-content {
  max-width: 700px;
  margin: 0 auto;
}

.eyebrow {
  text-transform: uppercase;
  letter-spacing: 0.12em;
  font-size: 12px;
  font-weight: 700;
  color: #3b82f6;
  margin: 0 0 12px;
  animation: slideUp 600ms ease-out backwards;
  animation-delay: 50ms;
}

.hero-title {
  font-size: clamp(28px, 6vw, 48px);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0 0 16px;
  background: linear-gradient(135deg, #1e293b, #3b82f6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: slideUp 600ms ease-out 100ms both;
}

.hero-description {
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-secondary);
  margin: 0 0 24px;
  animation: slideUp 600ms ease-out 200ms both;
}

.feature-pills {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 28px;
}

/* ==================== LOSSES SECTION ==================== */

.losses-section {
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.2);
  border-radius: 18px;
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  animation: slideUp 600ms ease-out 120ms both;
}

.losses-header h3 {
  margin: 0;
  font-size: 18px;
  font-weight: 700;
  color: #f8fafc;
}

.losses-subtitle {
  margin: 6px 0 0;
  font-size: 13px;
  color: rgba(226, 232, 240, 0.75);
}

.loss-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.loss-card {
  padding: 16px;
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.85);
  border: 1px solid rgba(148, 163, 184, 0.25);
  display: flex;
  flex-direction: column;
  gap: 8px;
  box-shadow: 0 12px 30px -24px rgba(15, 23, 42, 0.75);
}

.loss-name {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: #7dd3fc;
}

.loss-value {
  font-size: 15px;
  font-weight: 700;
  color: #f8fafc;
}

.loss-desc {
  margin: 0;
  font-size: 12px;
  color: rgba(226, 232, 240, 0.8);
  line-height: 1.5;
}

.pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--border-light);
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: #3b82f6;
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  animation: slideUp 600ms ease-out backwards;
}

.pill:nth-child(1) { animation-delay: 300ms; }
.pill:nth-child(2) { animation-delay: 350ms; }
.pill:nth-child(3) { animation-delay: 400ms; }

.pill:hover {
  background: rgba(59, 130, 246, 0.15);
  border-color: #3b82f6;
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.2);
}

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

.main-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
  animation: slideUp 600ms ease-out 100ms both;
}

/* Upload Bar */

.upload-bar {
  display: flex;
  flex-direction: column;
  gap: 16px;
  width: 100%;
}

.upload-bar.has-results {
  grid-column: 1;
  grid-row: 1;
}

.sidebar-header {
  padding: 12px 0;
  border-bottom: 1px solid var(--border-light);
}

.sidebar-header h3 {
  font-size: 14px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #3b82f6;
  margin: 0;
}

/* Compact Dropzone */

.compact-dropzone {
  padding: 18px 22px !important;
  border-radius: 14px !important;
  max-width: 100% !important;
  animation: slideUp 600ms ease-out 150ms both;
}

.compact-dropzone.has-file {
  padding: 18px 22px !important;
}

.compact-upload-content {
  display: flex;
  flex-direction: row;
  justify-content: space-between;
  align-items: center;
  align-items: center;
  gap: 12px;
  padding: 0;
}

.compact-upload-icon {
  font-size: 32px;
  animation: bounce 2s ease-in-out infinite;
}

.compact-upload-text {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  text-align: left;
}

/* Compact Preview */

.compact-preview {
  display: flex;
  flex-direction: row;
  gap: 14px;
  padding: 0 !important;
  align-items: center;
  justify-content: space-between;
}

.compact-preview-image {
  width: 180px;
  height: 120px;
  border-radius: 10px;
  object-fit: cover;
  animation: slideUp 400ms ease-out;
}

.file-meta {
  text-align: left;
  width: auto;
  flex: 1;
}

.file-name-compact {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  word-break: break-all;
}

.file-size-compact {
  font-size: 10px;
  color: var(--text-secondary);
  margin: 2px 0 0;
}

/* Compact Buttons */

.compact-button {
  padding: 8px 14px !important;
  font-size: 12px !important;
  border-radius: 8px !important;
}

.compact-enhance-button {
  width: 100%;
  padding: 10px 16px !important;
  font-size: 13px !important;
  animation: slideUp 600ms ease-out 200ms both;
}

.compact-reset-button {
  width: 100%;
  padding: 8px 12px !important;
  font-size: 12px !important;
}

.compact-alert {
  font-size: 12px !important;
  padding: 10px 12px !important;
  max-width: 100% !important;
  margin: 0 !important;
}

/* Results Main */

.results-main {
  display: flex;
  flex-direction: column;
  gap: 20px;
  width: 100%;
}

.results-main .section-title {
  margin: 0 0 8px;
  animation: slideUp 600ms ease-out 50ms both;
}

.dropzone::before {
  content: "";
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(59, 130, 246, 0.05), transparent 50%);
  pointer-events: none;
}

.dropzone::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent, rgba(255, 255, 255, 0.4), transparent);
  opacity: 0;
  transition: opacity 300ms ease;
  pointer-events: none;
}

.dropzone:hover::after {
  opacity: 1;
}

.dropzone.dropzone-active {
  border-color: #3b82f6;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(139, 92, 246, 0.06));
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(59, 130, 246, 0.18);
}

.dropzone.has-file {
  border-color: var(--border-light);
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.05), rgba(34, 197, 94, 0.05));
}

#imagePicker {
  display: none;
}

.upload-button,
.change-button {
  display: inline-block;
  padding: 12px 28px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 4px 15px rgba(59, 130, 246, 0.35);
  position: relative;
  overflow: hidden;
}

.upload-button::before,
.change-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 400ms, height 400ms;
}

.upload-button:hover::before,
.change-button:hover::before {
  width: 300px;
  height: 300px;
}

.upload-button:hover,
.change-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.45);
}

.upload-button:active,
.change-button:active {
  transform: translateY(-1px);
  box-shadow: 0 5px 15px rgba(59, 130, 246, 0.3);
}

.upload-button:focus-visible,
.change-button:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* Base Dropzone Styling */

.dropzone {
  border: 2px dashed var(--border-medium);
  border-radius: 16px;
  padding: 48px 32px;
  text-align: center;
  background: linear-gradient(135deg, rgba(248, 250, 252, 0.9), rgba(241, 245, 249, 0.7));
  backdrop-filter: blur(10px);
  transition: all 300ms cubic-bezier(0.23, 1, 0.320, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

/* File Preview */

.file-preview {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  animation: slideUp 300ms ease-out;
}

.preview-image {
  max-width: 100%;
  max-height: 300px;
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  animation: slideUp 500ms ease-out;
  transition: transform 250ms ease;
}

.preview-image:hover {
  transform: scale(1.02);
}

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

.file-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  margin: 0;
  word-break: break-all;
}

.file-size {
  font-size: 12px;
  color: var(--text-secondary);
  margin: 4px 0 0;
}

/* ==================== ACTION SECTION ==================== */

.action-section {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-top: 24px;
  animation: slideUp 600ms ease-out 200ms both;
}

.enhance-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: linear-gradient(135deg, #3b82f6, #2563eb);
  color: white;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 8px 25px rgba(59, 130, 246, 0.35);
  position: relative;
  overflow: hidden;
}

.enhance-button::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 500ms ease;
}

.enhance-button:hover:not(:disabled)::before {
  left: 100%;
}

.enhance-button:hover:not(:disabled) {
  transform: translateY(-4px);
  box-shadow: 0 12px 35px rgba(59, 130, 246, 0.45);
}

.enhance-button:active:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(59, 130, 246, 0.3);
}

.enhance-button:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

.enhance-button:disabled {
  opacity: 0.85;
  cursor: not-allowed;
}

.enhance-button.processing {
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
}

.spinner {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2.5px solid rgba(255, 255, 255, 0.25);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
  margin-right: 2px;
}

/* ==================== ALERTS ==================== */

.alert {
  max-width: 600px;
  margin: 0 auto;
  padding: 14px 16px;
  border-radius: 10px;
  font-size: 14px;
  animation: slideDown 300ms ease-out;
  border-left: 4px solid transparent;
  backdrop-filter: blur(8px);
}

.alert-error {
  background: linear-gradient(135deg, rgba(239, 68, 68, 0.12), rgba(220, 38, 38, 0.08));
  border: 1px solid rgba(239, 68, 68, 0.35);
  border-left-color: #ef4444;
  color: #b91c1c;
}

.alert-success {
  background: linear-gradient(135deg, rgba(16, 185, 129, 0.12), rgba(34, 197, 94, 0.08));
  border: 1px solid rgba(16, 185, 129, 0.35);
  border-left-color: #10b981;
  color: #065f46;
}

/* ==================== COMPARISON SECTION ==================== */

.comparison-section {
  animation: slideUp 500ms ease-out;
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text-primary);
  animation: slideUp 500ms ease-out 50ms both;
}

.section-subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 0 0 24px;
  animation: slideUp 500ms ease-out 100ms both;
}

/* Comparison Images */

.comparison-images {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  max-width: 1700px;
  width: 100%;
  margin: 0 auto;
  animation: slideUp 600ms ease-out 150ms both;
}

.comparison-item {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.comparison-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: #3b82f6;
  padding: 8px 12px;
  background: rgba(59, 130, 246, 0.1);
  border-radius: 6px;
  text-align: center;
}

.comparison-image {
  width: 100%;
  height: clamp(300px, 34vw, 520px);
  border-radius: 12px;
  object-fit: cover;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  animation: slideUp 600ms ease-out 150ms both;
}

.comparison-image:hover {
  transform: scale(1.02);
  box-shadow: 0 25px 70px rgba(0, 0, 0, 0.2);
}

/* Result Actions */

.result-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 28px;
  animation: slideUp 600ms ease-out 250ms both;
}

.download-button,
.reset-button {
  padding: 12px 28px;
  border: none;
  border-radius: 10px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 250ms cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.download-button {
  background: linear-gradient(135deg, #10b981, #059669);
  color: white;
  box-shadow: 0 4px 15px rgba(16, 185, 129, 0.35);
}

.download-button::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 400ms, height 400ms;
}

.download-button:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(16, 185, 129, 0.45);
}

.download-button:hover::before {
  width: 300px;
  height: 300px;
}

.download-button:active {
  transform: translateY(-1px);
}

.download-button:focus-visible {
  outline: 2px solid #10b981;
  outline-offset: 2px;
}

.reset-button {
  background: var(--bg-secondary);
  color: var(--text-primary);
  border: 1.5px solid var(--border-medium);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.reset-button:hover {
  background: var(--bg-tertiary);
  border-color: var(--border-dark);
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.reset-button:active {
  transform: translateY(-1px);
}

.reset-button:focus-visible {
  outline: 2px solid #3b82f6;
  outline-offset: 2px;
}

/* ==================== EMPTY STATE ==================== */

.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 60px 20px;
  color: var(--text-secondary);
  animation: fadeIn 500ms ease-out 300ms both;
}

.empty-icon {
  font-size: 64px;
  opacity: 0.5;
  animation: float 3s ease-in-out infinite;
}

.empty-state p {
  margin: 0;
  font-size: 16px;
  font-weight: 500;
}

/* ==================== FOOTER ==================== */

.app-footer {
  padding: 24px 20px;
  text-align: center;
  background: linear-gradient(135deg, rgba(59, 130, 246, 0.05), rgba(139, 92, 246, 0.05));
  border-top: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 13px;
  margin-top: auto;
  animation: slideUp 600ms ease-out 400ms both;
}

/* ==================== ANIMATIONS ==================== */

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

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

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

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

@keyframes bounce {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.05);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes shimmer {
  0% {
    background-position: -1000px 0;
  }
  100% {
    background-position: 1000px 0;
  }
}

@keyframes pulse-glow {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.5);
  }
  50% {
    box-shadow: 0 0 0 10px rgba(59, 130, 246, 0);
  }
}

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

@media (max-width: 1024px) {
  .main-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .upload-bar {
    position: static;
  }

  .comparison-images {
    grid-template-columns: 1fr 1fr;
  }

  .comparison-image {
    height: clamp(260px, 34vw, 420px);
  }
}

@media (max-width: 768px) {
  .app-shell {
    padding: 32px 16px;
    gap: 32px;
  }

  .app-header {
    padding: 24px 16px;
  }

  .main-layout {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .upload-bar {
    order: 2;
  }

  .results-main {
    order: 1;
  }

  .dropzone {
    padding: 36px 20px;
    border-radius: 16px;
  }

  .hero-title {
    font-size: clamp(24px, 5vw, 36px);
  }

  .preview-image {
    max-height: 200px;
  }

  .comparison-images {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .comparison-image {
    height: 240px;
  }

  .feature-pills {
    gap: 8px;
  }

  .pill {
    font-size: 12px;
    padding: 6px 12px;
  }

  .result-actions {
    flex-direction: column;
    width: 100%;
  }

  .download-button,
  .reset-button {
    width: 100%;
  }

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

@media (max-width: 480px) {
  .app-shell {
    padding: 24px 12px;
    gap: 24px;
  }

  .dropzone {
    padding: 28px 16px;
    border-radius: 12px;
  }

  .dropzone-title {
    font-size: 16px;
  }

  .upload-icon {
    font-size: 36px;
  }

  .hero-title {
    font-size: 24px;
  }

  .feature-pills {
    gap: 6px;
  }

  .pill {
    font-size: 11px;
  }

  .comparison-images {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .comparison-image {
    aspect-ratio: 4/3;
  }

  .comparison-label {
    font-size: 11px;
  }

  .logo-section {
    gap: 8px;
  }

  .app-title {
    font-size: 20px;
  }

  .main-layout {
    grid-template-columns: 1fr;
  }

  .compact-button {
    padding: 6px 10px !important;
  }
}

.actions {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.enhance-btn,
.reset-btn,
.download-btn {
  border: none;
  border-radius: 12px;
  padding: 11px 16px;
  font-family: var(--body-font);
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  transition: transform 200ms ease, box-shadow 200ms ease, opacity 200ms ease;
}

.enhance-btn {
  color: #f2fffc;
  background: linear-gradient(130deg, #1f7b85, #14545c);
  box-shadow: 0 12px 30px -20px rgba(15, 76, 83, 0.9);
}

.enhance-btn:disabled {
  opacity: 0.72;
  cursor: not-allowed;
}

.reset-btn {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.72);
  border: 1px solid var(--panel-border);
}

.download-btn {
  text-decoration: none;
  color: var(--text-main);
  background: #f3c969;
}

.enhance-btn:hover,
.reset-btn:hover,
.download-btn:hover {
  transform: translateY(-1px);
}

.error-banner {
  margin-top: 12px;
  border-radius: 12px;
  padding: 10px 12px;
  color: #6e1f16;
  background: #ffe8e1;
  border: 1px solid #f7c2b8;
}

.preview-grid {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.preview-card {
  border: 1px solid var(--panel-border);
  border-radius: 20px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.82);
  min-height: 310px;
}

h2 {
  margin: 2px 0 10px;
  color: var(--text-main);
  font-family: var(--display-font);
  font-size: 1.16rem;
}

.placeholder {
  width: 100%;
  height: 260px;
  border-radius: 12px;
}

.preview-card img {
  display: block;
  max-width: 100%;
  max-height: min(70vh, 560px);
  width: auto;
  height: auto;
  margin: 0 auto;
  object-fit: contain;
  image-rendering: auto;
  border-radius: 12px;
  border: 1px solid rgba(10, 47, 54, 0.15);
  background: #f7fbfa;
}

.placeholder {
  display: grid;
  place-items: center;
  text-align: center;
  color: var(--text-muted);
  padding: 20px;
  background: linear-gradient(120deg, rgba(221, 231, 232, 0.5), rgba(248, 251, 250, 0.95));
  border: 1px solid rgba(10, 47, 54, 0.08);
}

@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 900px) {
  .app-shell {
    padding-top: 24px;
  }

  .panel {
    padding: 16px;
  }

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

  .preview-card {
    min-height: 270px;
  }

  .placeholder {
    height: 220px;
  }

  .preview-card img {
    max-height: 420px;
  }
}