/* Custom variables for brand guidelines */
:root {
    --primary-color: #3F51B5;
    --primary-hover: #303F9F;
    --bg-color: #F4F7FB;
    --card-bg: #FFFFFF;
    --text-primary: #1E293B;
    --text-secondary: #64748B;
    --border-color: #E2E8F0;
    --border-radius: 20px;
    --transition-speed: 0.25s;
    --font-sans: 'Inter', sans-serif;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    /* Soft dot-grid background design pattern */
    background-image: radial-gradient(#d3dbec 1.5px, transparent 1.5px);
    background-size: 24px 24px;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.5;
}

/* Header UI */
.app-header {
    background-color: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1100px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    font-size: 1.8rem;
    color: var(--primary-color);
}

.brand-name {
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: 0.5px;
    color: var(--text-primary);
}

.accent-text {
    color: var(--primary-color);
}

.badge-pill {
    background-color: #E0E7FF;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.4rem 0.8rem;
    border-radius: 50px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

/* Navigation Tabs */
.app-main {
    flex: 1;
    max-width: 800px;
    width: 100%;
    margin: 2.5rem auto;
    padding: 0 1.5rem;
}

.nav-tabs {
    display: flex;
    background-color: #E2E8F0;
    padding: 0.35rem;
    border-radius: 14px;
    gap: 0.25rem;
    margin-bottom: 1.5rem;
}

.tab-btn {
    flex: 1;
    border: none;
    background: transparent;
    padding: 0.75rem 1rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 10px;
    transition: all var(--transition-speed) ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.tab-btn.active {
    background-color: var(--card-bg);
    color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

/* Tool View & Cards */
.tool-view {
    display: none;
}

.tool-view.active {
    display: block;
}

.tool-card {
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 2rem;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.05);
    border: 1px solid rgba(226, 232, 240, 0.8);
}

.tool-card h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.tool-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

/* Dropzone Design */
.dropzone {
    border: 2px dashed #CBD5E1;
    background-color: #F8FAFC;
    border-radius: 14px;
    padding: 2.5rem 1.5rem;
    text-align: center;
    cursor: pointer;
    position: relative;
    transition: all var(--transition-speed) ease;
    margin-bottom: 1.5rem;
}

.dropzone:hover, .dropzone.drag-over {
    border-color: var(--primary-color);
    background-color: #EEF2F6;
}

.file-input {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    cursor: pointer;
}

.dropzone-icon {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.dropzone-text {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.dropzone-text .highlight {
    color: var(--primary-color);
    text-decoration: underline;
}

.dropzone-subtext {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Preview Area (Images) */
.preview-container {
    margin-bottom: 1.5rem;
}

.preview-container h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.preview-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: 0.75rem;
}

.preview-item {
    position: relative;
    aspect-ratio: 1;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove-btn {
    position: absolute;
    top: 2px;
    right: 2px;
    background-color: rgba(239, 68, 68, 0.9);
    color: white;
    border: none;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    font-size: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Control Panel */
.control-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 1.25rem;
    margin-bottom: 1.5rem;
}

.control-group {
    flex: 1;
    min-width: 200px;
}

.control-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.control-group input[type="text"] {
    width: 100%;
    padding: 0.7rem 0.9rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-speed);
}

.control-group input[type="text"]:focus {
    border-color: var(--primary-color);
}

.slider-label {
    display: flex;
    justify-content: space-between;
}

#quality-val {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary-color);
}

.range-slider {
    width: 100%;
    height: 6px;
    border-radius: 5px;
    background: #E2E8F0;
    outline: none;
    margin-top: 0.75rem;
    accent-color: var(--primary-color);
}

/* Info Box */
.pdf-info-box {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background-color: #F8FAFC;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    border-radius: 10px;
    margin-bottom: 1.5rem;
}

.pdf-info-box i {
    color: var(--primary-color);
    font-size: 1.2rem;
}

.pdf-name {
    font-weight: 600;
    font-size: 0.9rem;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.pdf-pages {
    font-size: 0.8rem;
    background-color: #E2E8F0;
    padding: 0.2rem 0.6rem;
    border-radius: 50px;
    font-weight: 500;
}

/* Buttons */
.btn-primary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.9rem 1.5rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 1rem;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-secondary {
    background-color: transparent;
    color: #EF4444;
    border: 1px solid #FCA5A5;
    padding: 0.5rem 0.9rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-speed) ease;
}

.btn-secondary:hover {
    background-color: #FEE2E2;
}

/* Results Gallery */
.results-container {
    margin-top: 2rem;
    background-color: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 1.75rem;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
    border: 1px solid var(--border-color);
}

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

.results-header h2 {
    font-size: 1.2rem;
    font-weight: 700;
}

.results-gallery {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(170px, 1fr));
    gap: 1.25rem;
}

.result-card {
    background-color: #F8FAFC;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.result-thumb-wrapper {
    width: 100%;
    aspect-ratio: 1;
    overflow: hidden;
    border-radius: 8px;
    margin-bottom: 0.5rem;
    border: 1px solid var(--border-color);
    background-color: #E2E8F0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-thumb {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

.result-meta {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-overflow: ellipsis;
    white-space: nowrap;
    overflow: hidden;
    width: 100%;
}

.btn-download-single {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 0.45rem;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.8rem;
    cursor: pointer;
    transition: background-color var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.25rem;
}

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

/* Footer Section */
.app-footer {
    background-color: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 1.5rem;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: auto;
}

/* Responsiveness adjustments */
@media (max-width: 600px) {
    .nav-tabs {
        flex-direction: column;
    }
    
    .tool-card {
        padding: 1.25rem;
    }
    
    .control-panel {
        flex-direction: column;
    }
    
    .results-gallery {
        grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    }
  }
/* --- Floating Feedback Button --- */
.feedback-btn {
  position: fixed;
  bottom: 20px;
  right: 20px;
  z-index: 9999;
  background-color: #0076ff; /* Accent color, adjust to match your site */
  color: #ffffff;
  border: none;
  border-radius: 50px;
  padding: 12px 24px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 8px;
  transition: transform 0.2s ease, background-color 0.2s ease;
}

.feedback-btn:hover {
  background-color: #0056b3;
  transform: translateY(-2px);
}

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

/* --- Modal Overlay --- */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.4); /* Dark dim backdrop */
  z-index: 10000;
  display: none; /* Hidden by default */
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s ease;
  padding: 15px;
  box-sizing: border-box;
}

/* State class triggered by JS */
.modal-overlay.active {
  display: flex;
  opacity: 1;
}

/* --- Premium Glassmorphism Modal --- */
.glass-modal {
  position: relative;
  width: 100%;
  max-width: 500px; /* Adapts for desktop and fits mobile-first layouts */
  height: 80vh;
  max-height: 700px;
  
  /* Glassmorphic border, background blur, and gradient styling */
  background: rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.3);
  border-radius: 20px;
  box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.3);
  
  padding: 24px;
  display: flex;
  flex-direction: column;
  box-sizing: border-box;
  animation: slideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideIn {
  from {
    transform: translateY(30px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

/* --- Modal Header --- */
.modal-header {
  margin-bottom: 15px;
  color: #1c1c1e; /* Dark fallback, works on light glass overlays */
  text-shadow: 0 1px 2px rgba(255, 255, 255, 0.5);
}

.modal-header h2 {
  margin: 0 0 4px 0;
  font-size: 20px;
  font-weight: 700;
}

.modal-header p {
  margin: 0;
  font-size: 14px;
  opacity: 0.8;
}

/* --- Rounded Close Button --- */
.close-btn {
  position: absolute;
  top: 15px;
  right: 15px;
  width: 32px;
  height: 32px;
  background: rgba(255, 255, 255, 0.4);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #1c1c1e;
  border-radius: 50%;
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.2s, transform 0.2s;
  z-index: 10;
}

.close-btn:hover {
  background: rgba(255, 255, 255, 0.6);
  transform: scale(1.05);
}

/* --- Responsive Iframe Area --- */
.iframe-container {
  flex-grow: 1;
  width: 100%;
  border-radius: 12px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.5); /* Background loader backup */
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.iframe-container iframe {
  border: none;
    }