:root {
    --primary-color: #2563eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --bg-color: #f8fafc;
    --dark-color: #1e293b;
    --light-color: #ffffff;
    
    --dark-primary-color: #3b82f6;
    --dark-success-color: #34d399;
    --dark-error-color: #f87171;
    --dark-bg-color: #0f172a;
    --dark-text-color: #e2e8f0;
    --dark-element-color: #1e293b;
    --dark-border-color: #334155;
    --dark-hover-color: #1e40af;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    background-color: var(--bg-color);
    color: var(--dark-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--primary-color);
    color: var(--light-color);
    text-align: center;
    padding: 2rem 1rem;
    position: relative;
}

header h1 {
    margin: 0;
    font-size: 2.5rem;
}

header p {
    margin-top: 0.5rem;
    font-size: 1.2rem;
    opacity: 0.9;
}

main {
    flex: 1;
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.upload-container {
    background-color: var(--light-color);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
    text-align: center;
}

.drop-area {
    border: 2px dashed #ccc;
    border-radius: 0.5rem;
    padding: 3rem 2rem;
    margin: 1.5rem 0;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
}

.drop-area:hover, .drop-area.highlight {
    border-color: var(--primary-color);
    background-color: rgba(37, 99, 235, 0.05);
}

.drop-area i {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.drop-area p {
    margin: 0.5rem 0;
}

input[type="file"] {
    display: none;
}

.btn {
    background-color: var(--primary-color);
    color: var(--light-color);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.25rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: opacity 0.3s ease;
}

.btn:hover {
    opacity: 0.9;
}

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

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 1rem;
}

.status-indicator .spinner {
    display: none;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

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

#filesContainer {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.results-container {
    background-color: var(--light-color);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 1rem;
    position: relative;
}

.results-loading {
    text-align: center;
    padding: 1rem;
}

.results-loading .spinner {
    display: inline-block;
    border: 3px solid rgba(0, 0, 0, 0.1);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    width: 1.5rem;
    height: 1.5rem;
    animation: spin 1s linear infinite;
    margin-right: 0.5rem;
}

.property-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 1.5rem;
}

.property-table th, .property-table td {
    padding: 0.75rem;
    text-align: left;
    border-bottom: 1px solid #e2e8f0;
}

.property-table th {
    background-color: #f1f5f9;
    font-weight: 600;
}

.encrypted {
    font-weight: bold;
}

.encrypted.yes {
    color: var(--error-color);
}

.encrypted.no {
    color: var(--success-color);
}

.file-info {
    margin-top: 1.5rem;
    padding: 1rem;
    background-color: #f1f5f9;
    border-radius: 0.25rem;
    font-size: 0.9rem;
}

.faq-container {
    background-color: var(--light-color);
    border-radius: 0.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    padding: 2rem;
    margin-bottom: 2rem;
}

.faq-container h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    text-align: center;
}

.faq-item {
    border-bottom: 1px solid #e2e8f0;
}

.faq-question {
    padding: 1rem 0;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    user-select: none;
}

.faq-icon {
    margin-right: 0.75rem;
    color: var(--primary-color);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-icon {
    transform: rotate(90deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
    padding: 0 1rem 0 2rem;
}

.faq-item.active .faq-answer {
    max-height: 300px;
    padding-bottom: 1rem;
}

footer {
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
    background-color: var(--dark-color);
    color: var(--light-color);
}

footer a {
    color: var(--light-color);
    opacity: 0.8;
    text-decoration: none;
}

footer a:hover {
    opacity: 1;
    text-decoration: underline;
}

.error-message {
    color: var(--error-color);
    margin-top: 1rem;
    text-align: center;
    font-weight: 600;
}

.dark-mode-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 50px;
    height: 25px;
    background-color: #e2e8f0;
    border-radius: 25px;
    cursor: pointer;
    display: flex;
    align-items: center;
    padding: 5px;
    transition: background-color 0.3s ease;
}

body.dark-mode .dark-mode-toggle {
    background-color: #334155;
}

.toggle-circle {
    width: 20px;
    height: 20px;
    background-color: #fff;
    border-radius: 50%;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
    transform: translateX(0);
    transition: transform 0.3s ease;
}

body.dark-mode .toggle-circle {
    transform: translateX(25px);
}

.light-icon {
    display: inline;
    color: #f59e0b;
}

.dark-icon {
    display: none;
    color: #6366f1;
}

body.dark-mode .light-icon {
    display: none;
}

body.dark-mode .dark-icon {
    display: inline;
}

body.dark-mode {
    background-color: var(--dark-bg-color);
    color: var(--dark-text-color);
}

body.dark-mode header {
    background-color: var(--dark-primary-color);
}

body.dark-mode .upload-container,
body.dark-mode .results-container,
body.dark-mode .faq-container {
    background-color: var(--dark-element-color);
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
}

body.dark-mode .drop-area {
    border-color: var(--dark-border-color);
}

body.dark-mode .drop-area:hover,
body.dark-mode .drop-area.highlight {
    border-color: var(--dark-primary-color);
    background-color: rgba(59, 130, 246, 0.1);
}

body.dark-mode .property-table th {
    background-color: var(--dark-border-color);
}

body.dark-mode .property-table td,
body.dark-mode .property-table th {
    border-color: var(--dark-border-color);
}

body.dark-mode .file-info {
    background-color: var(--dark-border-color);
}

body.dark-mode .faq-item {
    border-color: var(--dark-border-color);
}

body.dark-mode .btn {
    background-color: var(--dark-primary-color);
}

body.dark-mode .btn:hover {
    background-color: var(--dark-hover-color);
}

body.dark-mode a {
    color: var(--dark-primary-color);
}

body.dark-mode footer a[style*="color: var(--primary)"] {
    color: var(--dark-primary-color) !important;
}

@media (max-width: 600px) {
    .results-container {
        padding: 1rem;
    }
    
    .property-table th, .property-table td {
        padding: 0.5rem;
        font-size: 0.9rem;
    }
}

.download-btn {
    background-color: #254e8e;
    color: #fff;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.3rem;
    font-size: 1rem;
    font-weight: 600;
    margin: 0 0.5rem;
    cursor: pointer;
    transition: background 0.2s, opacity 0.2s;
    box-shadow: 0 2px 6px rgba(37, 78, 142, 0.08);
}
.download-btn:hover {
    background-color: #3566b3;
    opacity: 0.95;
}
body.dark-mode .download-btn {
    background-color: #3566b3;
    color: #e2e8f0;
}
body.dark-mode .download-btn:hover {
    background-color: #254e8e;
}

.mode-toggle-icon {
    position: absolute;
    bottom: 10px;
    right: 10px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    z-index: 10;
}

.mode-toggle-icon:hover {
    transform: scale(1.1);
}

.mode-toggle-icon i {
    font-size: 1.2rem;
    color: var(--primary-color);
    transition: color 0.3s ease;
}

.mode-toggle-icon:hover i {
    color: var(--primary-color);
    opacity: 0.7;
}

body.dark-mode .mode-toggle-icon i {
    color: var(--dark-primary-color);
}

body.dark-mode .mode-toggle-icon:hover i {
    color: var(--dark-primary-color);
    opacity: 0.7;
}

.url-input-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}

#urlInput {
    padding: 0.75rem 1rem;
    border: 2px solid #ccc;
    border-radius: 0.25rem;
    font-size: 1rem;
    width: 100%;
    box-sizing: border-box;
    transition: border-color 0.3s ease;
}

#urlInput:focus {
    outline: none;
    border-color: var(--primary-color);
}

body.dark-mode #urlInput {
    background-color: var(--dark-border-color);
    border-color: var(--dark-border-color);
    color: var(--dark-text-color);
}

body.dark-mode #urlInput:focus {
    border-color: var(--dark-primary-color);
}

.drop-area.url-mode {
    cursor: default;
}

.drop-area.url-mode > i,
.drop-area.url-mode > p,
.drop-area.url-mode > button {
    display: none;
}