/* Import design tokens */
@import url('variables.css');

/* ============================================
   BASE PAGE LAYOUT - APP THEME
   ============================================ */

.app-body {
  margin: 0;
  font-family: var(--font-family-primary);
  min-height: 100vh;
  line-height: var(--line-height-relaxed);
  background-color: var(--color-bg-primary);
  color: var(--color-text-primary);
  display: flex;
  flex-direction: column;
  overflow-x: hidden;
}

.app-main-content {
  flex: 1 0 auto;
  display: flex;
  flex-direction: column;
  margin-left: 240px;
  background-color: var(--color-bg-primary);
  min-height: 100vh;
  overflow-x: hidden;
}

h1 {
  font-size: var(--font-size-5xl);
  color: var(--color-text-primary);
  text-align: center;
  margin: 0;
  font-weight: var(--font-weight-bold);
  letter-spacing: -0.02em;
}

h3 {
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-semibold);
  margin: 0;
}

/* ============================================
   APP CONTAINER & GRID LAYOUT
   ============================================ */

.i2v-container {
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-lg);
}

.i2v-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
  margin-top: var(--space-2xl);
}

@media (max-width: 1024px) {
  .i2v-grid {
    grid-template-columns: 1fr;
  }
}

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

.app-hero-section {
  width: 100%;
  padding: var(--space-2xl) var(--space-lg);
}

.hero-header {
  text-align: center;
  margin-bottom: var(--space-3xl);
  animation: fadeIn var(--transition-slow);
}

.hero-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.hero-title {
  font-size: clamp(2.5rem, 8vw, 3.5rem);
  line-height: var(--line-height-tight);
  background: var(--color-accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 600px;
  margin: 0;
  line-height: var(--line-height-relaxed);
}

/* ============================================
   MODE SELECTOR
   ============================================ */

.mode-selector-card {
  background: linear-gradient(135deg, var(--color-bg-secondary) 0%, rgba(168, 85, 247, 0.05) 100%);
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  margin-bottom: var(--space-2xl);
  animation: slideUp var(--transition-slow);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.mode-selector-label {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
  color: var(--color-text-primary);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid rgba(168, 85, 247, 0.2);
}

.mode-icon {
  font-size: var(--font-size-2xl);
}

.mode-buttons {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-lg);
}

.mode-btn {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-md);
  background: var(--color-bg-tertiary);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-lg);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: all var(--transition-base);
  min-height: 110px;
}

.mode-btn:hover {
  background: rgba(168, 85, 247, 0.08);
  border-color: var(--color-accent-purple);
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(168, 85, 247, 0.15);
}

.mode-btn.mode-btn-active {
  background: var(--color-accent-gradient);
  border-color: var(--color-accent-pink);
  color: white;
  box-shadow: 0 12px 32px rgba(168, 85, 247, 0.6);
  font-weight: var(--font-weight-bold);
  transform: translateY(-4px) scale(1.02);
}

.mode-btn.mode-btn-active:hover {
  box-shadow: 0 16px 40px rgba(168, 85, 247, 0.7);
  transform: translateY(-6px) scale(1.02);
}

.mode-btn.mode-btn-active .mode-btn-icon {
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.mode-btn.mode-btn-active .mode-btn-text {
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-base);
}

.mode-btn.mode-btn-active::before {
  content: '✓';
  position: absolute;
  top: 8px;
  right: 8px;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-full);
  color: white;
  font-weight: bold;
  font-size: var(--font-size-sm);
}

.mode-btn-icon {
  font-size: var(--font-size-4xl);
}

.mode-btn-text {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

.mode-badge {
  position: absolute;
  top: 6px;
  left: 6px;
  width: 60px;
  background: var(--color-success);
  color: white;
  padding: 3px 8px;
  border-radius: var(--radius-full);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  letter-spacing: 0.3px;
  text-transform: uppercase;
  z-index: 10;
}

/* ============================================
   MAIN APP CONTAINER
   ============================================ */

.app-container {
  flex: 1;
  padding: var(--space-lg);
  max-width: 900px;
  width: 100%;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-2xl);
}

/* ============================================
   STATUS BADGE CONTAINER
   ============================================ */

.status-badge-container {
  padding: 0 var(--space-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.status-badge {
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  border-left: 4px solid;
  animation: slideUp var(--transition-base);
}

.status-badge-success {
  background: rgba(16, 185, 129, 0.1);
  border-left-color: var(--color-success);
}

.status-badge-info {
  background: rgba(59, 130, 246, 0.1);
  border-left-color: var(--color-info);
}

.badge-icon {
  font-size: var(--font-size-2xl);
  flex-shrink: 0;
}

.badge-content {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.badge-content strong {
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-semibold);
}

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

.countdown-timer {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  margin: 0;
  padding-top: var(--space-xs);
}

/* ============================================
   UPLOAD FORM CARD
   ============================================ */

/* Native App Card System */
.i2v-card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
  transition: all var(--transition-base);
  display: flex;
  flex-direction: column;
  margin-bottom: var(--space-2xl);
}

.i2v-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.16);
}

.i2v-card-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-border);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.05), rgba(236, 72, 153, 0.05));
}

.i2v-card-header h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-text-primary);
  letter-spacing: -0.3px;
  margin: 0;
}

.i2v-card-body {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.i2v-card-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--color-border);
  background: rgba(168, 85, 247, 0.03);
}

/* Styling for cards is handled by .i2v-card classes */

.upload-step {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  padding-bottom: var(--space-lg);
  border-bottom: 1px solid var(--color-border);
}

.upload-step:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.step-header {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--color-accent-gradient);
  border-radius: var(--radius-full);
  color: var(--color-text-primary);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-xl);
  flex-shrink: 0;
}

.step-title {
  margin: 0;
  font-size: var(--font-size-2xl);
}

/* ============================================
   UPLOAD TABS
   ============================================ */

.upload-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  margin-bottom: var(--space-lg);
}

.upload-tab-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: var(--space-md) var(--space-lg);
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-weight: var(--font-weight-medium);
  transition: all var(--transition-base);
}

.upload-tab-btn:hover {
  color: var(--color-text-primary);
}

.upload-tab-btn.active {
  border-bottom-color: var(--color-accent-purple);
  color: var(--color-text-primary);
}

.upload-tab-content {
  display: none;
  animation: fadeIn var(--transition-base);
}

.upload-tab-content.active {
  display: block;
}

/* ============================================
   DROP ZONE
   ============================================ */

.drop-zone {
  border: 2px dashed var(--color-accent-purple);
  padding: var(--space-2xl);
  text-align: center;
  border-radius: var(--radius-lg);
  background: rgba(168, 85, 247, 0.05);
  cursor: pointer;
  transition: all var(--transition-base);
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 200px;
}

.drop-zone:hover {
  background: rgba(168, 85, 247, 0.1);
  border-color: var(--color-accent-pink);
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(168, 85, 247, 0.15);
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-lg);
}

.drop-icon {
  font-size: 3rem;
  line-height: 1;
}

.drop-hint {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: var(--font-size-sm);
}

/* ============================================
   UPLOAD BUTTONS
   ============================================ */

.upload-btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  padding: var(--space-md) var(--space-xl);
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 4px 12px rgba(168, 85, 247, 0.3);
  font-size: var(--font-size-base);
}

.upload-btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(168, 85, 247, 0.4);
}

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

/* ============================================
   URL INPUT GROUP
   ============================================ */

.url-input-group {
  display: flex;
  gap: var(--space-md);
}

.url-input {
  flex: 1;
  padding: var(--space-md);
  background: var(--color-bg-tertiary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-family-primary);
  transition: all var(--transition-base);
}

.url-input:focus {
  outline: none;
  border-color: var(--color-accent-purple);
  box-shadow: 0 0 0 3px rgba(168, 85, 247, 0.1);
  background: var(--color-bg-secondary);
}

.btn-load {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-base);
  font-size: var(--font-size-base);
}

.btn-load:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(168, 85, 247, 0.3);
}

/* ============================================
   MEDIA PREVIEWS
   ============================================ */

.media-preview {
  width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  margin-top: var(--space-lg);
}

.media-details {
  padding: var(--space-lg);
  background: rgba(255, 255, 255, 0.05);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-border);
  margin-top: var(--space-lg);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* ============================================
   GALLERY SECTIONS
   ============================================ */

.templates-gallery {
  margin-top: var(--space-xl);
}

.gallery-title {
  margin: 0 0 var(--space-lg);
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
}

.templates-carousel {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
  gap: var(--space-md);
  overflow-x: auto;
  padding-bottom: var(--space-sm);
}

.templates-carousel::-webkit-scrollbar {
  height: 6px;
}

.templates-carousel::-webkit-scrollbar-track {
  background: rgba(168, 85, 247, 0.05);
  border-radius: 3px;
}

.templates-carousel::-webkit-scrollbar-thumb {
  background: var(--color-accent-purple);
  border-radius: 3px;
}

.template-item {
  position: relative;
  aspect-ratio: 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  cursor: pointer;
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
  transition: all var(--transition-base);
  border: 2px solid transparent;
}

.template-item:hover {
  transform: scale(1.05);
  box-shadow: 0 8px 16px rgba(168, 85, 247, 0.3);
  border-color: var(--color-accent-purple);
}

.template-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.template-overlay {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 0, 0, 0.3);
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.template-item:hover .template-overlay {
  opacity: 1;
}

/* ============================================
   PROCESSING CARD
   ============================================ */

/* Styling for cards is handled by .i2v-card classes */

.processing-options {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin: 0;
}

.payment-checkbox {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  cursor: pointer;
  user-select: none;
  position: relative;
}

.checkbox-label {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  font-weight: var(--font-weight-medium);
}

/* ============================================
   PROCESS BUTTON
   ============================================ */

.btn-process {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  position: relative;
  padding: var(--space-lg) var(--space-2xl);
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  border: none;
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-lg);
  cursor: pointer;
  transition: all var(--transition-base);
  box-shadow: 0 8px 20px rgba(168, 85, 247, 0.3);
  min-height: 56px;
}

.btn-process:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 28px rgba(168, 85, 247, 0.4);
}

.btn-process:active {
  transform: translateY(-1px);
}

.btn-process:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.btn-icon {
  font-size: var(--font-size-2xl);
}

.btn-text {
  font-weight: var(--font-weight-bold);
}

.badge-free-indicator {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--color-success);
  color: white;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  white-space: nowrap;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
  z-index: 10;
}

.processing-note {
  margin: 0;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
}

/* ============================================
   STATUS MESSAGE
   ============================================ */

.status-message {
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  font-weight: var(--font-weight-medium);
  animation: slideUp var(--transition-base);
}

.status-message.hidden {
  display: none;
}

.status-message.success {
  background: rgba(16, 185, 129, 0.1);
  border: 1px solid var(--color-success);
  color: var(--color-success);
}

.status-message.error {
  background: rgba(239, 68, 68, 0.1);
  border: 1px solid var(--color-error);
  color: var(--color-error);
}

.status-message.info {
  background: rgba(59, 130, 246, 0.1);
  border: 1px solid var(--color-info);
  color: var(--color-info);
}

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

.result-modal {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  backdrop-filter: blur(6px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  animation: fadeIn var(--transition-base);
  padding: var(--space-lg);
}

.result-modal.show {
  display: flex;
}

.modal-content {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
  max-width: 700px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  transition: all var(--transition-base);
}

.modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--space-lg) var(--space-2xl);
  border-bottom: 1px solid rgba(var(--color-border-rgb), 0.5);
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.03), rgba(236, 72, 153, 0.03));
}

.modal-title {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0;
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
  color: var(--color-text-primary);
  letter-spacing: -0.3px;
}

.modal-title-icon {
  font-size: var(--font-size-3xl);
  line-height: 1;
}

.modal-close {
  background: none;
  border: none;
  font-size: 24px;
  color: var(--color-text-secondary);
  cursor: pointer;
  padding: 6px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  flex-shrink: 0;
}

.modal-close:hover {
  background: rgba(168, 85, 247, 0.12);
  color: var(--color-accent-purple);
}

.modal-close:active {
  background: rgba(168, 85, 247, 0.2);
}

.modal-body {
  padding: var(--space-2xl);
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.result-container {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  align-items: center;
}

.comparison-container {
  display: flex;
  gap: var(--space-lg);
  justify-content: center;
  width: 100%;
}

.result-image {
  width: 100%;
  max-width: 100%;
  height: auto;
  border-radius: var(--radius-lg);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
  display: block;
  transition: all var(--transition-base);
}

.result-image:hover {
  box-shadow: 0 12px 32px rgba(168, 85, 247, 0.2);
}

/* ============================================
   IMAGE COMPARISON SLIDER
   ============================================ */

.img-comp-container {
  position: relative;
  width: 100%;
  min-height: 300px;
  max-height: 600px;
  overflow: hidden;
  margin-bottom: var(--space-lg);
  display: flex;
  justify-content: center;
  align-items: center;
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-border);
  background: var(--color-bg-secondary);
}

.img-comp-after,
.img-comp-before {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-comp-before {
  z-index: 2;
  border-right: 2px solid var(--color-accent-purple);
  clip-path: inset(0 0 0 0);
}

.img-comp-after {
  z-index: 1;
}

.img-comp-after img,
.img-comp-before img {
  width: auto;
  height: auto;
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  display: block;
}

.img-comp-slider {
  position: absolute;
  z-index: 3;
  top: 0;
  bottom: 0;
  width: 40px;
  margin-left: -20px;
  cursor: ew-resize;
  display: flex;
  align-items: center;
  justify-content: center;
}

.img-comp-handle {
  background: var(--color-accent-purple);
  border-radius: 50%;
  width: 30px;
  height: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
}

.img-comp-arrow-left,
.img-comp-arrow-right {
  font-size: 12px;
  color: var(--color-text-primary);
  margin: 0 2px;
}

.img-comp-vertical-line {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background-color: var(--color-accent-purple);
  transform: translateX(-50%);
  z-index: 4;
}

.modal-footer {
  display: flex;
  gap: var(--space-md);
  padding: var(--space-lg) var(--space-2xl);
  border-top: 1px solid rgba(var(--color-border-rgb), 0.5);
  background: rgba(168, 85, 247, 0.02);
}

.btn-download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-md);
  flex: 1;
  padding: var(--space-md) var(--space-lg);
  background: var(--color-accent-gradient);
  color: var(--color-text-primary);
  text-decoration: none;
  border-radius: var(--radius-md);
  font-weight: var(--font-weight-semibold);
  transition: all var(--transition-base);
  border: none;
  cursor: pointer;
}

.btn-download:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 16px rgba(168, 85, 247, 0.3);
}

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

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: scale(0.98);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ============================================
   OUTPUT PLACEHOLDER
   ============================================ */

.output-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(135deg, rgba(168, 85, 247, 0.05), rgba(236, 72, 153, 0.05));
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 20px;
  text-align: center;
  min-height: 300px;
}

.output-icon {
  font-size: 48px;
  color: var(--color-text-secondary);
  opacity: 0.4;
}

.output-text {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  margin: 0;
  line-height: var(--line-height-relaxed);
}

.output-placeholder-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

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

/* ============================================
   MEDIA QUERIES
   ============================================ */

/* ============================================
   TABLET - 1024px and below
   ============================================ */
@media (max-width: 1024px) {
  .app-main-content {
    margin-left: 0;
    width: 100%;
  }

  .i2v-container {
    padding: var(--space-lg);
  }

  .i2v-grid {
    grid-template-columns: 1fr;
  }
}

/* ============================================
   MOBILE - 768px and below
   ============================================ */
@media (max-width: 768px) {
  .app-main-content {
    margin-left: 0;
    width: 100%;
    margin-top: 60px;
    overflow-x: hidden;
  }

  .i2v-container {
    padding: var(--space-lg) var(--space-md);
    max-width: 100%;
    overflow-x: hidden;
  }

  .i2v-grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .hero-title {
    font-size: clamp(2rem, 6vw, 3rem);
  }

  .hero-subtitle {
    font-size: var(--font-size-base);
    max-width: 90vw;
  }

  .mode-selector-card {
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
  }

  .mode-buttons {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  .mode-btn {
    padding: var(--space-md);
    font-size: var(--font-size-sm);
  }

  .i2v-card {
    border-radius: 10px;
    padding: 0;
  }

  .i2v-card-header {
    padding: 16px 20px;
    font-size: var(--font-size-lg);
  }

  .i2v-card-header h3 {
    font-size: 18px;
  }

  .i2v-card-body {
    padding: 16px;
    gap: 12px;
  }

  .i2v-card-footer {
    padding: 16px;
  }

  .upload-tabs {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .upload-tab-btn {
    padding: 10px 16px;
    font-size: 13px;
  }

  .step-header {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .step-number {
    font-size: var(--font-size-lg);
  }

  .step-title {
    font-size: var(--font-size-base);
  }

  .form-label {
    font-size: 12px;
    letter-spacing: 0.3px;
  }

  .form-control,
  .form-select {
    padding: 10px 12px;
    font-size: 14px;
  }

  .upload-zone {
    padding: 24px 16px;
    min-height: 150px;
  }

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

  .upload-text {
    font-size: 14px;
  }

  .upload-button {
    padding: 8px 16px;
    font-size: 13px;
  }

  .upload-hint {
    font-size: 12px;
  }

  .media-preview {
    border-radius: 8px;
  }

  .media-details {
    font-size: 12px;
  }

  .templates-gallery {
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
  }

  .modal-content {
    max-height: 95vh;
    max-width: 95vw;
    margin: var(--space-md);
    border-radius: 10px;
  }

  .modal-header {
    padding: 16px 20px;
    font-size: var(--font-size-lg);
  }

  .modal-title {
    font-size: var(--font-size-lg);
  }

  .modal-body {
    padding: 16px;
  }

  .modal-footer {
    padding: 16px;
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: auto;
    padding: 10px 16px;
    font-size: 14px;
  }

  .btn-primary {
    width: 100%;
  }

  .btn-process {
    padding: 12px 16px;
    font-size: 14px;
    width: 100%;
  }

  .btn-lg {
    padding: 12px 16px;
    font-size: 14px;
  }

  .payment-checkbox {
    gap: 8px;
  }

  .processing-note {
    font-size: 12px;
  }

  .result-image {
    border-radius: 8px;
  }

  .output-placeholder {
    padding: 32px 16px;
  }

  .output-icon {
    font-size: 48px;
  }

  .output-text {
    font-size: 14px;
  }

  .status-message {
    font-size: 12px;
  }
}

/* ============================================
   SMALL MOBILE - 480px and below
   ============================================ */
@media (max-width: 480px) {
  .app-main-content {
    margin-left: 0;
    width: 100%;
    padding-top: 60px;
  }

  .i2v-container {
    padding: var(--space-md) 12px;
    max-width: 100%;
    overflow-x: hidden;
  }

  .i2v-grid {
    gap: 12px;
  }

  .app-hero-section {
    padding: var(--space-lg) 12px;
  }

  .hero-title {
    font-size: clamp(1.5rem, 5vw, 2.25rem);
  }

  .hero-subtitle {
    font-size: 13px;
    max-width: 95vw;
  }

  .mode-selector-card {
    padding: var(--space-md);
    margin-bottom: var(--space-lg);
  }

  .mode-selector-label {
    font-size: 12px;
    gap: 8px;
    margin-bottom: var(--space-md);
  }

  .mode-icon {
    font-size: 18px;
  }

  .mode-buttons {
    gap: 8px;
  }

  .mode-btn {
    padding: 12px;
    font-size: 11px;
    flex-direction: row;
  }

  .mode-btn-icon {
    font-size: 16px;
  }

  .mode-btn-text {
    font-size: 11px;
  }

  .i2v-card {
    border-radius: 8px;
  }

  .i2v-card-header {
    padding: 12px 16px;
  }

  .i2v-card-header h3 {
    font-size: 16px;
  }

  .i2v-card-body {
    padding: 12px;
    gap: 12px;
  }

  .i2v-card-footer {
    padding: 12px;
  }

  .upload-step {
    padding: 0;
  }

  .step-header {
    gap: 8px;
    margin-bottom: var(--space-md);
  }

  .step-number {
    font-size: 16px;
    width: 24px;
    height: 24px;
  }

  .step-title {
    font-size: 14px;
  }

  .upload-tabs {
    gap: 8px;
  }

  .upload-tab-btn {
    padding: 8px 12px;
    font-size: 12px;
  }

  .upload-tab-btn.active {
    padding: 8px 12px;
  }

  .form-label {
    font-size: 11px;
    letter-spacing: 0.3px;
    margin-bottom: 6px;
  }

  .form-control,
  .form-select {
    padding: 9px 11px;
    font-size: 14px;
    border-radius: 6px;
  }

  .form-group {
    gap: 8px;
    margin-bottom: 12px;
  }

  .form-help-text {
    font-size: 11px;
  }

  .upload-zone {
    padding: 20px 12px;
    min-height: 140px;
    border-radius: 8px;
  }

  .upload-icon {
    font-size: 32px;
  }

  .upload-text {
    font-size: 13px;
    margin: 12px 0;
  }

  .upload-button {
    padding: 8px 12px;
    font-size: 12px;
  }

  .upload-hint {
    font-size: 11px;
    line-height: 1.3;
  }

  .url-input-group {
    gap: 8px;
  }

  .url-input-group input {
    padding: 9px 11px;
    font-size: 13px;
  }

  .media-preview {
    border-radius: 8px;
    max-width: 100%;
  }

  .media-details {
    font-size: 11px;
    margin-top: 8px;
  }

  .frames-gallery {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .templates-gallery {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .template-item {
    aspect-ratio: 1;
  }

  .template-item img {
    border-radius: 6px;
  }

  .modal-overlay {
    padding: 0;
  }

  .modal-content {
    max-height: 95vh;
    max-width: 95vw;
    margin: 0;
    border-radius: 8px 8px 0 0;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
  }

  .modal-header {
    padding: 12px 16px;
  }

  .modal-header h3 {
    font-size: 16px;
  }

  .modal-title {
    font-size: 16px;
    gap: 8px;
  }

  .modal-title-icon {
    font-size: 18px;
  }

  .modal-close {
    width: 28px;
    height: 28px;
  }

  .modal-close i {
    font-size: 16px;
  }

  .modal-body {
    padding: 12px;
  }

  .result-container {
    max-width: 100%;
  }

  .result-image {
    width: 100%;
    border-radius: 8px;
  }

  .comparison-container {
    margin-top: 12px;
  }

  .modal-footer {
    padding: 12px;
    gap: 8px;
    flex-direction: column;
  }

  .btn {
    padding: 10px 12px;
    font-size: 13px;
    border-radius: 6px;
    width: 100%;
  }

  .btn-primary {
    width: 100%;
  }

  .btn-secondary {
    width: 100%;
  }

  .btn-sm {
    padding: 8px 12px;
    font-size: 12px;
  }

  .btn-lg {
    padding: 11px 14px;
    font-size: 13px;
    width: 100%;
  }

  .btn-process {
    width: 100%;
    padding: 11px 14px;
    font-size: 13px;
  }

  .btn-icon {
    font-size: 14px;
  }

  .btn-text {
    font-size: 13px;
  }

  .payment-checkbox {
    gap: 8px;
    margin-bottom: var(--space-md);
  }

  .checkbox-label {
    font-size: 13px;
  }

  .processing-note {
    font-size: 12px;
    margin: 8px 0 0 0;
  }

  .payment-card {
    flex-direction: column;
    gap: 12px;
    padding: 12px;
  }

  .payment-info {
    gap: 4px;
  }

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

  .payment-amount {
    font-size: 18px;
  }

  .payment-status {
    font-size: 12px;
    gap: 8px;
  }

  .status-badge-container {
    padding: 0 12px;
  }

  .status-badge {
    padding: 12px;
    margin-bottom: 12px;
  }

  .badge-icon {
    font-size: 16px;
  }

  .badge-content {
    gap: 4px;
  }

  .badge-content strong {
    font-size: 13px;
  }

  .badge-content span {
    font-size: 11px;
  }

  .countdown-timer {
    font-size: 11px;
  }

  .result-section {
    padding: 0;
  }

  .output-placeholder {
    padding: 24px 16px;
    min-height: 200px;
  }

  .output-icon {
    font-size: 40px;
  }

  .output-text {
    font-size: 13px;
  }

  .status-message {
    font-size: 12px;
  }

  .hidden {
    display: none !important;
  }

  .d-none {
    display: none !important;
  }
}

/* ============================================
   UTILITIES
   ============================================ */

.hidden {
  display: none !important;
}

.w-100 {
  width: 100% !important;
}

/* Utility for smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Prevent horizontal scroll */
body,
html {
  overflow-x: hidden;
}

/* ============================================
   NAVBAR STYLES FOR MOBILE
   ============================================ */

.navbar {
  background: rgba(20, 20, 30, 0.8);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(168, 85, 247, 0.1);
  transition: all var(--transition-base);
}

.navbar-toggle-btn {
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: 1.5em;
  cursor: pointer;
  padding: var(--space-sm);
  transition: all var(--transition-base);
}

.navbar-toggle-btn:hover {
  color: var(--color-accent-purple);
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  margin: 0 auto;
}

.mobile-logo h3 {
  margin: 0;
  font-size: var(--font-size-lg);
}

/* ============================================
   RESPONSIVE NAVBAR & SIDEBAR
   ============================================ */

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

  #navbar-wrapper {
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
  }

  .app-main-content {
    margin-left: 0;
    margin-top: 60px;
  }

  /* Modal responsive adjustments */
  .result-modal {
    padding: var(--space-md);
  }

  .modal-content {
    max-width: 95vw;
    max-height: 95vh;
  }

  .modal-header {
    padding: var(--space-md) var(--space-lg);
  }

  .modal-title {
    font-size: var(--font-size-lg);
  }

  .modal-body {
    padding: var(--space-lg);
  }

  .modal-footer {
    padding: var(--space-md) var(--space-lg);
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }
}