/* index.css */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --background-color: #121212;
  --surface-color: #1e1e1e;
  --primary-color: #6200ee;
  --primary-variant-color: #3700b3;
  --secondary-color: #03dac6;
  --text-primary-color: #ffffff;
  --text-secondary-color: #b3b3b3;
  --border-color: #2c2c2c;
  --error-color: #cf6679;
  --success-color: #4caf50;
  --font-family: 'Inter', sans-serif;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

html, body, #root {
  height: 100%;
}

body {
  font-family: var(--font-family);
  background-color: var(--background-color);
  color: var(--text-primary-color);
  line-height: 1.6;
  overflow: hidden; /* Prevent the whole page from scrolling */
}

#root {
  width: 100%;
}

.container {
  display: flex;
  flex-direction: column;
  height: 100%; /* Make container fill the viewport */
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 1rem 2rem; /* Add horizontal padding */
    flex-shrink: 0; /* Prevent header from shrinking */
    margin-bottom: 1rem;
}

.title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary-color);
}

.title span {
    color: var(--primary-color);
}

.lang-toggle {
    background-color: var(--surface-color);
    color: var(--text-secondary-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 0.5rem 1rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: background-color 0.3s, color 0.3s;
}

.lang-toggle:hover {
    background-color: var(--primary-color);
    color: var(--text-primary-color);
}

.main-content {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 2rem;
  padding: 0 2rem 2rem 2rem; /* Add padding */
  flex-grow: 1; /* Allow this to fill available space */
  min-height: 0; /* Crucial for child element scrolling in flexbox */
}

.controls-panel {
  background-color: var(--surface-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  overflow-y: auto; /* Allow this panel to scroll internally if needed */
}

.upload-section, .settings-section {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

h2 {
  font-size: 1.25rem;
  font-weight: 600;
  border-bottom: 1px solid var(--border-color);
  padding-bottom: 0.5rem;
}

.file-input-wrapper {
  position: relative;
  overflow: hidden;
  display: inline-block;
  width: 100%;
  padding: 1rem;
  border: 2px dashed var(--border-color);
  border-radius: var(--border-radius);
  text-align: center;
  cursor: pointer;
  transition: border-color 0.3s, background-color 0.3s;
}

.file-input-wrapper:hover {
  border-color: var(--primary-color);
  background-color: rgba(98, 0, 238, 0.1);
}

.file-input-wrapper input[type="file"] {
  position: absolute;
  left: 0;
  top: 0;
  opacity: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}

.file-name {
  margin-top: 0.5rem;
  font-size: 0.875rem;
  color: var(--text-secondary-color);
  word-break: break-all;
}

.watermark-preview-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
  gap: 0.5rem;
  max-height: 160px;
  overflow-y: auto;
  padding: 0.5rem;
  background-color: var(--background-color);
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
}

.watermark-preview-grid img {
  width: 100%;
  height: auto;
  object-fit: contain;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.setting {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.setting label {
  font-weight: 500;
  color: var(--text-secondary-color);
}

.setting .value {
    font-weight: 600;
    color: var(--secondary-color);
}

.slider {
  width: 100%;
  accent-color: var(--primary-color);
}

.position-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.5rem;
}

.position-grid label {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 0.5rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  cursor: pointer;
  transition: background-color 0.3s, border-color 0.3s;
  font-size: 0.8rem;
  text-align: center;
}

.position-grid input[type="radio"] {
  display: none;
}

.position-grid input[type="radio"]:checked + label {
  background-color: var(--primary-color);
  border-color: var(--primary-variant-color);
  color: var(--text-primary-color);
}

.generate-btn {
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--border-radius);
  background-color: var(--primary-color);
  color: white;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.3s, transform 0.1s;
  text-transform: uppercase;
}

.generate-btn:hover {
  background-color: var(--primary-variant-color);
}

.generate-btn:active {
    transform: scale(0.98);
}

.generate-btn:disabled {
  background-color: var(--border-color);
  cursor: not-allowed;
}

.version-info {
  margin-top: auto;
  padding-top: 1rem;
  text-align: center;
  font-size: 0.75rem;
  color: var(--text-secondary-color);
  opacity: 0.6;
}

.results-panel {
  background-color: var(--surface-color);
  padding: 1.5rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
  overflow-y: auto; /* Make the results panel scrollable */
  display: flex; /* Use flexbox to manage placeholder centering */
  flex-direction: column;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
    flex-shrink: 0; /* Prevent header from shrinking when results are empty */
}

.results-actions {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.download-all-btn, .download-pdf-btn {
    padding: 0.5rem 1rem;
    border: none;
    border-radius: var(--border-radius);
    color: white;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: background-color 0.3s;
}

.download-all-btn {
    background-color: var(--success-color);
}

.download-all-btn:hover {
    background-color: #45a049;
}

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

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

.download-all-btn:disabled, .download-pdf-btn:disabled {
    background-color: var(--border-color);
    cursor: not-allowed;
}


.placeholder, .loader-container {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  height: 100%;
  color: var(--text-secondary-color);
  text-align: center;
  flex-grow: 1; /* Allow placeholder to fill space in flex container */
}

.loader {
  border: 4px solid var(--border-color);
  border-top: 4px solid var(--primary-color);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.image-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

.image-card {
  position: relative;
  border: 1px solid var(--border-color);
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
}

.image-card img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  display: block;
}

.image-card .overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(0, 0, 0, 0.6);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  opacity: 0;
  transition: opacity 0.3s;
}

.image-card:hover .overlay {
  opacity: 1;
}

.image-card .page-number {
    color: white;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.download-btn {
  padding: 0.5rem 1rem;
  border: 1px solid white;
  border-radius: var(--border-radius);
  background-color: transparent;
  color: white;
  cursor: pointer;
  transition: background-color 0.3s, color 0.3s;
  text-decoration: none;
}

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

.error-message {
    background-color: var(--error-color);
    color: white;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    margin: 0 2rem 1rem 2rem; /* Give it horizontal margin to match content */
}


/* Responsive */
@media (max-width: 900px) {
    body {
        overflow: auto; /* Allow scrolling on smaller screens */
    }
    html, body, #root, .container {
        height: auto;
    }
    .main-content {
        grid-template-columns: 1fr;
        min-height: auto;
        padding: 0 1rem 1rem 1rem; /* Adjust padding for smaller screens */
    }
    .controls-panel, .results-panel {
        overflow-y: visible;
    }
    .results-panel {
        min-height: 300px; /* Give it some min height on mobile */
    }
    .app-header {
        padding-left: 1rem;
        padding-right: 1rem;
    }
}

@media (max-width: 500px) {
    .app-header {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    .title {
        font-size: 1.5rem;
        text-align: center;
    }
    .results-header {
        flex-direction: column;
        align-items: stretch;
    }
    .results-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .download-all-btn, .download-pdf-btn {
        width: 100%;
        text-align: center;
    }
}