/* style.css - Styles for AI Image Upscaler */

/* --- Variables and Global Resets --- */
:root {
  --primary-color: #4a6cf7;
  --primary-hover: #3a5cd7;
  --secondary-color: #6c757d;
  --secondary-hover: #5a6268;
  --success-color: #28a745;
  --success-hover: #218838;
  --danger-color: #dc3545;
  --danger-hover: #c82333;
  --warning-color: #ffc107;
  --info-color: #17a2b8;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --text-color: #212529;
  --text-muted: #6c757d;
  --bg-color: #f1f3f6;
  --card-bg: #ffffff;
  --card-header-bg: var(--light-color); /* Added for consistency */
  --preview-bg: var(--disabled-bg); /* Added for consistency */
  --border-color: #dee2e6;
  --border-radius: 8px;
  --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  --box-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.12);
  --input-bg: #ffffff;
  --input-border: #ced4da;
  --input-focus-border: #80bdff;
  --disabled-bg: #e9ecef;
  --disabled-text: #6c757d;

  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
}

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

html {
    /* Smooth scrolling for navigation if needed */
    scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: var(--bg-color);
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
  padding: var(--spacing-md);
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* --- Header --- */
.app-header {
  text-align: center;
  margin-bottom: var(--spacing-xl);
  padding-top: var(--spacing-lg);
}

h1 {
  font-size: 2.25rem;
  font-weight: 600;
  color: var(--dark-color);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* --- Card Layout --- */
.card {
  background-color: var(--card-bg);
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  border: 1px solid var(--border-color);
}

.auth-card {
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

h2 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--border-color);
  padding-bottom: var(--spacing-md);
  color: var(--primary-color);
}
h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    color: var(--dark-color);
}
h4 {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

/* --- Buttons --- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.6rem 1.2rem;
  font-size: 1rem;
  font-weight: 500;
  line-height: 1.5;
  text-align: center;
  vertical-align: middle;
  cursor: pointer;
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;
  border: 1px solid transparent;
  border-radius: calc(var(--border-radius) / 1.5);
  transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
  text-decoration: none; /* For potential link buttons */
  white-space: nowrap; /* Prevent wrapping */
}
.button:not(:disabled):not(.disabled) {
    cursor: pointer;
}
.button:disabled, .button.disabled {
  opacity: 0.65;
  cursor: not-allowed;
  box-shadow: none;
}
.button:focus, .button:focus-visible {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(var(--primary-color), 0.25); /* Adjust color based on button type if needed */
}

/* Button Variants */
.button.primary { color: #fff; background-color: var(--primary-color); border-color: var(--primary-color); }
.button.primary:hover:not(:disabled) { background-color: var(--primary-hover); border-color: var(--primary-hover); }

.button.secondary { color: #fff; background-color: var(--secondary-color); border-color: var(--secondary-color); }
.button.secondary:hover:not(:disabled) { background-color: var(--secondary-hover); border-color: var(--secondary-hover); }

.button.success { color: #fff; background-color: var(--success-color); border-color: var(--success-color); }
.button.success:hover:not(:disabled) { background-color: var(--success-hover); border-color: var(--success-hover); }

.button.danger { color: #fff; background-color: var(--danger-color); border-color: var(--danger-color); }
.button.danger:hover:not(:disabled) { background-color: var(--danger-hover); border-color: var(--danger-hover); }

.button.action { color: #fff; background-color: var(--info-color); border-color: var(--info-color); } /* Using info for 'action' */
.button.action:hover:not(:disabled) { background-color: #138496; border-color: #117a8b; }

/* Default/Outline style */
.button:not(.primary):not(.secondary):not(.success):not(.danger):not(.action) {
    color: var(--text-color); background-color: #fff; border-color: var(--border-color);
}
.button:not(.primary):not(.secondary):not(.success):not(.danger):not(.action):hover:not(:disabled) {
    background-color: var(--light-color);
}

/* Button Sizes */
.button.small { padding: 0.3rem 0.8rem; font-size: 0.875rem; }
.button.large {
    font-size: 1.2rem;
    padding: var(--spacing-md) var(--spacing-xl);
    min-width: 200px;
}

/* Button Group */
.button-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
  justify-content: center; /* Center buttons in auth */
}

/* --- Notifications --- */
.notification {
  padding: 0.8rem 1.2rem;
  margin-bottom: var(--spacing-md);
  border: 1px solid transparent;
  border-radius: calc(var(--border-radius) / 1.5);
  border-left-width: 5px;
  font-size: 0.95rem;
}
.notification.info { color: #0c5460; background-color: #d1ecf1; border-color: #bee5eb; border-left-color: var(--info-color); }
.notification.success { color: #155724; background-color: #d4edda; border-color: #c3e6cb; border-left-color: var(--success-color); }
.notification.warning { color: #856404; background-color: #fff3cd; border-color: #ffeeba; border-left-color: var(--warning-color); }
.notification.error { color: #721c24; background-color: #f8d7da; border-color: #f5c6cb; border-left-color: var(--danger-color); }

/* --- Authentication Section --- */
#auth-status-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}
#auth-signed-in-content p { margin-bottom: var(--spacing-md); font-weight: 500; }
#auth-error-message { margin-top: var(--spacing-md); }

/* --- Form Controls --- */
label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
}
label.inline-label { display: inline-block; margin-bottom: 0; margin-left: var(--spacing-sm); }

input[type="file"], input[type="color"], select, progress {
    vertical-align: middle; /* Align form elements better */
}

input[type="color"] { /* Default style for color pickers */
    padding: 1px 2px; /* Adjust padding for better centering */
    min-height: 30px; /* Match button height */
    min-width: 30px; /* Match button height */
    width: 30px;      /* Fixed size */
    height: 30px;     /* Fixed size */
    border: 1px solid var(--input-border);
    border-radius: 4px;
    cursor: pointer;
    background-color: var(--input-bg);
    vertical-align: middle; /* Align with label */
}
input[type="color"]:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

/* --- Status & Loading --- */
#status-section { min-height: 50px; /* Prevent layout shifts */ }
.loading {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-md);
  background-color: var(--light-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
}
.loader {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  border: 4px solid rgba(var(--primary-color), 0.2);
  border-radius: 50%;
  border-top-color: var(--primary-color);
  animation: spin 1s linear infinite;
}
.loading-text-container { flex-grow: 1; }
#loading-text { font-weight: 500; display: block; margin-bottom: var(--spacing-sm); }
.progress-wrapper { display: flex; align-items: center; gap: var(--spacing-sm); }
progress {
  flex-grow: 1;
  height: 10px;
  border-radius: 5px;
  overflow: hidden;
  border: none;
  appearance: none;
}
progress::-webkit-progress-bar { background-color: var(--disabled-bg); }
progress::-webkit-progress-value { background-color: var(--primary-color); transition: width 0.3s ease; }
progress::-moz-progress-bar { background-color: var(--primary-color); }
#progress-percentage { font-size: 0.85rem; font-weight: 600; color: var(--primary-color); min-width: 35px; text-align: right; }

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

/* --- Upload Section --- */
.upload-area-container { margin-bottom: var(--spacing-md); }
.upload-label { cursor: pointer; }
.drop-zone {
  border: 3px dashed var(--border-color);
  border-radius: var(--border-radius);
  padding: var(--spacing-xl);
  min-height: 180px;
  display: flex; /* Use flex to center placeholder initially */
  justify-content: center;
  align-items: center;
  text-align: center;
  background-color: var(--light-color);
  transition: background-color 0.2s ease, border-color 0.2s ease;
  cursor: pointer;
  position: relative;
  overflow: hidden;
}
.drop-zone:focus { outline: none; border-color: var(--primary-color); }
.drop-zone.dragover {
  border-color: var(--primary-color);
  background-color: rgba(74, 108, 247, 0.05);
  border-style: solid;
}
.drop-zone-placeholder { color: var(--text-muted); font-size: 1.1rem; pointer-events: none; }
/* Hide placeholder when grid has items */
.drop-zone:has(.upload-preview-grid:not(:empty)) .drop-zone-placeholder { display: none; }
.drop-zone:not(:has(.upload-preview-grid:not(:empty))) { /* Keep centering for placeholder */ }
.drop-zone:has(.upload-preview-grid:not(:empty)) { display: block; padding: var(--spacing-md); } /* Switch to block for grid */

.upload-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
  gap: var(--spacing-md);
  width: 100%;
  margin-top: var(--spacing-md);
}
.upload-preview-item {
  position: relative;
  width: 80px;
  height: 80px;
  border-radius: 4px;
  overflow: hidden;
  box-shadow: 0 1px 3px rgba(0,0,0,0.1);
}
.upload-preview-item img { width: 100%; height: 100%; object-fit: cover; display: block; }
.upload-remove-button {
  position: absolute; top: 2px; right: 2px; width: 20px; height: 20px;
  background-color: rgba(220, 53, 69, 0.8); color: white; border: none; border-radius: 50%;
  font-size: 14px; font-weight: bold; line-height: 18px; text-align: center; cursor: pointer;
  padding: 0; opacity: 0; transition: opacity 0.2s ease; z-index: 10;
}
.upload-preview-item:hover .upload-remove-button { opacity: 1; }

.file-info {
  display: flex; justify-content: space-between; align-items: center;
  margin-top: var(--spacing-md); font-size: 0.9rem; color: var(--text-muted);
  padding: var(--spacing-sm); background-color: var(--light-color); border-radius: var(--border-radius);
}
.file-info small { font-weight: 500; }
.file-info #file-count { color: var(--primary-color); font-weight: 600; }

.upload-limit-info {
    color: var(--text-muted); font-size: 0.9rem; margin-bottom: var(--spacing-sm);
    padding: var(--spacing-xs) var(--spacing-sm); background-color: var(--light-color);
    border-radius: var(--border-radius); border-left: 3px solid var(--warning-color);
}

/* --- Settings & Results Section --- */
/* Removed styles for two-column layout, adjustments column, global sliders, selection info */

/* Main Action Bar */
.main-action-bar {
    margin: var(--spacing-xl) 0; padding: var(--spacing-lg);
    background-color: var(--light-color); border-radius: var(--border-radius);
    text-align: center; border: 1px solid var(--border-color);
}

/* Image Details Grid */
.image-details-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-md);
}

.image-card {
  border: 1px solid var(--border-color); border-radius: var(--border-radius);
  background-color: var(--card-bg); overflow: hidden; display: flex;
  flex-direction: column; transition: box-shadow 0.2s ease;
}
.image-card:hover { box-shadow: var(--box-shadow-hover); }

.image-card-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: var(--spacing-sm) var(--spacing-md); background-color: var(--card-header-bg);
    border-bottom: 1px solid var(--border-color);
}
.image-card-filename {
    font-weight: 600; font-size: 0.9rem; overflow: hidden;
    text-overflow: ellipsis; white-space: nowrap; flex-grow: 1;
}
.image-card-remove-btn {
    background: none; border: none; color: var(--danger-color); font-size: 1.2rem;
    font-weight: bold; cursor: pointer; padding: 0 var(--spacing-xs); line-height: 1;
    margin-left: var(--spacing-sm);
}
.image-card-remove-btn:hover { color: var(--danger-hover); }

.image-card-preview {
    position: relative; height: 180px; display: flex; justify-content: center;
    align-items: center; background-color: var(--preview-bg); overflow: hidden; cursor: pointer;
}
.image-card-preview img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; transition: filter 0.1s linear; /* Add transition for filter changes */ }

/* Card Badges */
.image-card-badge {
  position: absolute; padding: 3px 8px; border-radius: 4px; font-size: 0.75rem;
  font-weight: 600; z-index: 5; pointer-events: none; color: white; background-color: rgba(0, 0, 0, 0.65);
}
.image-card-badge.transparency-badge { top: var(--spacing-sm); left: var(--spacing-sm); }
.image-card-badge.status-badge { top: var(--spacing-sm); right: var(--spacing-sm); }
.image-card-badge.status-badge.info { background-color: var(--info-color); }
.image-card-badge.status-badge.success { background-color: var(--success-color); }
.image-card-badge.status-badge.warning { background-color: var(--warning-color); }
.image-card-badge.status-badge.error { background-color: var(--danger-color); }

.image-card-body { padding: var(--spacing-md); flex-grow: 1; }
.image-card-dimensions { font-size: 0.8rem; color: var(--text-muted); }

/* Per-Image Controls */
.image-card-controls {
    margin-top: var(--spacing-md); padding-top: var(--spacing-md);
    border-top: 1px dashed var(--border-color); display: flex; justify-content: space-between;
    align-items: center; gap: var(--spacing-sm); flex-wrap: wrap;
}
.image-card-controls .control-row { display: flex; align-items: center; gap: var(--spacing-xs); }
.image-card-controls .control-row.bg-control label { font-size: 0.9rem; margin-right: 2px; font-weight: 500; }
.image-card-controls .image-bg-color-input { /* Inherits from general input[type=color] */ }
.image-card-controls .upscale-factor-toggle { min-width: 50px; font-weight: bold; }
.image-card-controls .edit-adjustments-btn i { margin-right: 4px; font-size: 0.9em; }

/* Result Display Area */
.image-card-result {
    margin-top: var(--spacing-md); padding-top: var(--spacing-md);
    border-top: 1px dashed var(--border-color); display: flex; flex-direction: column;
    align-items: flex-start; gap: var(--spacing-sm);
}
.image-card-status { font-size: 0.9rem; font-weight: 500; margin-bottom: var(--spacing-xs); }
.image-card-status.error { color: var(--danger-color); }
.image-card-status.success { color: var(--success-color); }
.image-card-status.warning { color: var(--warning-color); } /* For skipped */
.image-card-dimensions.result-dimensions { font-size: 0.8rem; color: var(--text-muted); }
.image-card-download-btn { align-self: flex-end; margin-top: var(--spacing-sm); }

/* --- Results Summary --- */
#results-summary {
    margin-top: var(--spacing-xl); padding: var(--spacing-lg); background-color: var(--light-color);
    border: 1px solid var(--border-color); border-radius: var(--border-radius); text-align: center;
}
#results-summary p { margin-bottom: var(--spacing-md); font-size: 1.05rem; }
#download-controls { margin-top: var(--spacing-sm); }

/* --- Navigation Buttons --- */
.navigation-buttons {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  gap: var(--spacing-md); margin-top: var(--spacing-lg); padding-top: var(--spacing-lg);
  border-top: 1px solid var(--border-color);
}
.navigation-buttons.bottom-nav { margin-top: var(--spacing-xl); }

/* --- Preview Modal --- */
.preview-modal {
  position: fixed; top: 0; left: 0; width: 100%; height: 100%; background-color: rgba(0, 0, 0, 0.85);
  display: flex; flex-direction: column; z-index: 1000; opacity: 0; visibility: hidden;
  transition: opacity 0.3s ease, visibility 0s linear 0.3s; pointer-events: none;
}
.preview-modal:not(.hidden) { opacity: 1; visibility: visible; pointer-events: auto; transition-delay: 0s; }
.preview-toolbar {
  position: fixed; top: 0; left: 0; right: 0; display: flex; justify-content: flex-end; align-items: center;
  padding: var(--spacing-md); background: rgba(0, 0, 0, 0.7); z-index: 1010;
}
.preview-close-button {
    background: none; border: none; color: white; font-size: 2rem; font-weight: bold; line-height: 1;
    padding: 0 var(--spacing-sm); cursor: pointer; text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}
.preview-close-button:hover { color: var(--light-color); }
.preview-content {
  flex: 1; margin-top: 60px; display: flex; flex-direction: column; align-items: center;
  justify-content: center; overflow: hidden; padding: var(--spacing-md);
}
.preview-image-container { max-width: 100%; max-height: calc(100vh - 120px); display: flex; justify-content: center; align-items: center; overflow: auto; }
#preview-image { display: block; max-width: none; }
#preview-info {
    color: white; text-align: center; padding: var(--spacing-sm); font-size: 0.9rem; background: rgba(0, 0, 0, 0.5);
    border-radius: 0 0 var(--border-radius) var(--border-radius); margin-top: var(--spacing-sm); max-width: 80%;
}

/* --- Image Adjustment Modal --- */
.modal {
    position: fixed; /* CRITICAL for overlay */
    top: 0;          /* CRITICAL */
    left: 0;         /* CRITICAL */
    width: 100%;     /* CRITICAL */
    height: 100%;    /* CRITICAL */
    background: rgba(0, 0, 0, 0.8); /* Semi-transparent background */
    display: flex;           /* Use flexbox to center content */
    justify-content: center; /* Center horizontally */
    align-items: center;     /* Center vertically */
    z-index: 1050; /* Ensure modal is above other content */
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0s linear 0.3s; /* Visibility transition */
    padding: var(--spacing-md); /* Add some padding around the content */
}
.modal:not(.hidden) {
    opacity: 1;
    visibility: visible;
    transition: opacity 0.3s ease, visibility 0s linear 0s; /* Visibility transition */
}
.modal-content {
    background: var(--bg-color); /* Use main bg color for content */
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    width: 90%;                 /* Limit width */
    max-width: 900px;           /* Max width */
    max-height: 90vh;           /* Limit height */
    display: flex;              /* Use flex for internal layout */
    flex-direction: column;     /* Stack header, body */
    position: relative;         /* Needed if using absolute inside */
    border: 1px solid var(--border-color);
    overflow: hidden; /* Prevent content itself from overflowing the rounded corners */
}
.modal-header {
    display: flex; justify-content: space-between; align-items: center;
    padding: var(--spacing-md); border-bottom: 1px solid var(--border-color);
    background-color: var(--card-header-bg); flex-shrink: 0;
}
.modal-header h3 { margin: 0; font-size: 1.2rem; color: var(--dark-color);}
.modal-nav { display: flex; gap: var(--spacing-sm); }
.modal-nav button { padding: var(--spacing-xs) var(--spacing-sm); /* Smaller buttons */ }
.modal-nav #modal-close { font-size: 1.5rem; font-weight: bold; line-height: 1; }
.modal-body {
    display: grid; grid-template-columns: minmax(0, 3fr) minmax(250px, 1fr);
    gap: var(--spacing-lg); padding: var(--spacing-lg); overflow: hidden;
    flex-grow: 1; min-height: 0;
}
.modal-preview {
    display: flex; justify-content: center; align-items: center; background: var(--preview-bg);
    border-radius: var(--border-radius); overflow: hidden; min-height: 0;
    transition: opacity 0.3s ease; position: relative; cursor: default;
}
.modal-preview.loading-preview { opacity: 0.7; cursor: wait; } /* Style for loading state */
.modal-preview img { max-width: 100%; max-height: 100%; object-fit: contain; transition: filter 0.1s linear; display: block; }
.modal-adjustments { display: flex; flex-direction: column; gap: var(--spacing-md); overflow-y: auto; padding-right: var(--spacing-sm); min-height: 0; }
.adjustment-row { display: flex; flex-direction: column; gap: var(--spacing-sm); }
.adjustment-row label { font-size: 0.9rem; margin-bottom: 0; color: var(--text-muted); }
.slider-container { display: grid; grid-template-columns: 1fr auto 30px; gap: var(--spacing-sm); align-items: center; }
.modal-range-input { width: 100%; -webkit-appearance: none; appearance: none; height: 6px; background: var(--input-border); border-radius: 3px; outline: none; cursor: pointer; }
.modal-range-input::-webkit-slider-thumb { -webkit-appearance: none; appearance: none; width: 18px; height: 18px; background: var(--primary-color); border-radius: 50%; cursor: pointer; transition: background 0.2s; }
.modal-range-input::-moz-range-thumb { width: 18px; height: 18px; background: var(--primary-color); border-radius: 50%; cursor: pointer; border: none; transition: background 0.2s; }
.modal-range-input:hover::-webkit-slider-thumb { background: var(--primary-hover); }
.modal-range-input:hover::-moz-range-thumb { background: var(--primary-hover); }
.modal-number-input { width: 60px; text-align: right; padding: var(--spacing-xs) var(--spacing-sm); border: 1px solid var(--input-border); border-radius: 4px; background-color: var(--input-bg); color: var(--text-color); }
.unit { color: var(--text-muted); font-size: 0.9rem; text-align: left; }
.modal-actions { margin-top: auto; padding-top: var(--spacing-md); display: flex; justify-content: flex-end; flex-shrink: 0; }

/* Dark mode toggle button */
.theme-toggle {
  position: fixed; bottom: var(--spacing-md); right: var(--spacing-md); background: var(--card-bg);
  border: 1px solid var(--border-color); border-radius: 50%; width: 40px; height: 40px; display: flex;
  align-items: center; justify-content: center; cursor: pointer; z-index: 100; box-shadow: var(--box-shadow); transition: background-color 0.3s ease;
}
.theme-toggle .icon { font-size: 1.2rem; }
.theme-toggle:hover { background: var(--light-color); }

/* --- Dark theme styles --- */
[data-theme="dark"] {
  --bg-color: #1a1a1a; --card-bg: #2d2d2d; --card-header-bg: #333333; --preview-bg: #252525;
  --text-color: #e0e0e0; --text-muted: #a0a0a0; --border-color: #404040; --light-color: #333333;
  --dark-color: #e0e0e0; --input-bg: #333333; --input-border: #404040; --input-focus-border: #6c9fff;
  --disabled-bg: #2a2a2a; --disabled-text: #808080; --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
  --box-shadow-hover: 0 6px 16px rgba(0, 0, 0, 0.4);
  --notification-success-bg: #1b4332; --notification-success-color: #e3f9e5;
  --notification-error-bg: #771d1d; --notification-error-color: #fde8e8;
  --notification-info-bg: #1e429f; --notification-info-color: #e1effe;
  --notification-warning-bg: #92400e; --notification-warning-color: #fef3c7;
}
[data-theme="dark"] .card { background-color: var(--card-bg); border-color: var(--border-color); }
[data-theme="dark"] .drop-zone { background-color: var(--input-bg); border-color: var(--border-color); }
[data-theme="dark"] .image-card { background-color: var(--card-bg); border-color: var(--border-color); }
[data-theme="dark"] .image-card-header { background-color: var(--card-header-bg); }
[data-theme="dark"] .image-card-preview { background-color: var(--preview-bg); }
[data-theme="dark"] .button:not(.primary):not(.success):not(.danger):not(.action) { background-color: var(--input-bg); color: var(--text-color); border-color: var(--border-color); }
[data-theme="dark"] .button:not(.primary):not(.success):not(.danger):not(.action):hover:not(:disabled) { background-color: var(--light-color); }
[data-theme="dark"] .notification { background-color: var(--card-bg); box-shadow: var(--box-shadow); }
[data-theme="dark"] .notification.success { background-color: var(--notification-success-bg); color: var(--notification-success-color); border-left-color: var(--success-color); }
[data-theme="dark"] .notification.error { background-color: var(--notification-error-bg); color: var(--notification-error-color); border-left-color: var(--danger-color); }
[data-theme="dark"] .notification.info { background-color: var(--notification-info-bg); color: var(--notification-info-color); border-left-color: var(--info-color); }
[data-theme="dark"] .notification.warning { background-color: var(--notification-warning-bg); color: var(--notification-warning-color); border-left-color: var(--warning-color); }
[data-theme="dark"] input[type="color"] { background-color: var(--input-bg); border-color: var(--border-color); }
[data-theme="dark"] .theme-toggle { background-color: var(--card-bg); border-color: var(--border-color); color: var(--text-color); }
[data-theme="dark"] .theme-toggle:hover { background-color: var(--light-color); }
[data-theme="dark"] .help-text { color: var(--text-muted); }
[data-theme="dark"] .upload-limit-info { background-color: var(--light-color); border-left-color: var(--warning-color); }
[data-theme="dark"] .main-action-bar { background-color: var(--card-bg); border-color: var(--border-color); }
[data-theme="dark"] .file-info { background-color: var(--light-color); }
[data-theme="dark"] .loading { background-color: var(--light-color); border-color: var(--border-color); }
[data-theme="dark"] #results-summary { background-color: var(--light-color); border-color: var(--border-color); }
[data-theme="dark"] h1 { color: var(--text-color); }
[data-theme="dark"] h2 { color: var(--primary-color); } /* Keep primary for main headings */
[data-theme="dark"] h3 { color: var(--text-color); }
[data-theme="dark"] h4 { color: var(--text-color); }
/* Modal Dark Theme */
[data-theme="dark"] .modal-content { background: var(--card-bg); border-color: var(--border-color); }
[data-theme="dark"] .modal-header { background-color: var(--card-header-bg); border-bottom-color: var(--border-color); }
[data-theme="dark"] .modal-header h3 { color: var(--text-color); }
[data-theme="dark"] .modal-preview { background: var(--preview-bg); }
[data-theme="dark"] .modal-number-input { background-color: var(--input-bg); color: var(--text-color); border-color: var(--input-border); }
[data-theme="dark"] .modal-range-input { background: var(--input-border); }
[data-theme="dark"] .modal-range-input::-webkit-slider-thumb { background: var(--primary-color); }
[data-theme="dark"] .modal-range-input::-moz-range-thumb { background: var(--primary-color); }
[data-theme="dark"] .modal-range-input:hover::-webkit-slider-thumb { background: var(--primary-hover); }
[data-theme="dark"] .modal-range-input:hover::-moz-range-thumb { background: var(--primary-hover); }
[data-theme="dark"] .modal-adjustments hr { border-color: var(--border-color); opacity: 0.3; } /* Added HR style */
[data-theme="dark"] .modal-adjustments label { color: var(--text-muted); }
[data-theme="dark"] .modal-adjustments label[style*="bold"] { color: var(--text-color); } /* Ensure main labels stand out */
[data-theme="dark"] .unit { color: var(--text-muted); }

/* --- Utility Classes --- */
.hidden { display: none !important; }
.visually-hidden {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
  body { padding: var(--spacing-sm); font-size: 15px; }
  .container { padding: 0 var(--spacing-sm); }
  h1 { font-size: 1.8rem; } h2 { font-size: 1.3rem; }
  .card { padding: var(--spacing-md); }
  .image-details-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: var(--spacing-md); }
  .image-card-preview { height: 150px; }
  .navigation-buttons { flex-direction: column; gap: var(--spacing-sm); }
  .navigation-buttons button { width: 100%; }
  .button-group { flex-direction: column; align-items: stretch; }
  .button-group .button { width: 100%; }
  .main-action-bar .button { width: 100%; max-width: 300px; }
  /* Modal adjustments */
  .modal-body { grid-template-columns: 1fr; overflow: hidden; }
  .modal-preview { max-height: 40vh; }
  .modal-adjustments { overflow-y: auto; max-height: 45vh; }
}

@media (max-width: 480px) {
  h1 { font-size: 1.6rem; } .subtitle { font-size: 1rem; }
  .drop-zone { min-height: 140px; padding: var(--spacing-lg); }
  .upload-preview-grid { grid-template-columns: repeat(auto-fill, minmax(70px, 1fr)); gap: var(--spacing-sm); }
  .upload-preview-item { width: 70px; height: 70px; }
  .image-details-grid { grid-template-columns: 1fr; } /* Stack cards */
  .image-card-preview { height: 180px; }
  .preview-info { font-size: 0.8rem; padding: var(--spacing-xs) var(--spacing-sm); }
  .preview-close-button { width: 36px; height: 36px; font-size: 1.5rem; }
  .modal-body { gap: var(--spacing-md); }
  .modal-content { width: 95%; }
}