body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    margin: 0;
    background-color: #161616; /* Even darker background for prototype distinction */
    color: #e0e0e0;
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.prototype-container {
    width: 100%;
    display: flex;
    flex-direction: column;
}

.prototype-nav {
    background-color: #1e1e1e;
    padding: 0.75rem 0;
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    border-bottom: 2px solid #61dafb;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-button {
    padding: 0.6rem 1.2rem;
    background-color: transparent;
    color: #b0b0b0;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

.nav-button:hover {
    background-color: #333;
    color: #e0e0e0;
}

.nav-button.active {
    background-color: #61dafb;
    color: #1e1e1e;
    border-color: #61dafb;
    font-weight: 700;
}

.prototype-view {
    display: none;
    padding: 1rem 0; /* Add some padding for views */
}

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

/* Re-using and adapting styles from index.css */
.container {
    width: 90%;
    max-width: 1000px;
    margin: 1rem auto; /* Reduced top margin as nav is sticky */
    padding: 1.5rem;
    background-color: #2a2a2a;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

header {
    text-align: center;
    margin-bottom: 2rem;
    border-bottom: 1px solid #444;
    padding-bottom: 1rem;
}

header h1 {
    color: #61dafb;
    font-size: 2.5rem;
    margin-bottom: 0.3rem;
}

.tagline {
    font-size: 1rem;
    color: #b0b0b0;
    max-width: 700px;
    margin: 0 auto;
}

.prototype-badge {
    font-size: 0.8rem;
    background-color: #ffc107;
    color: #1e1e1e;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    vertical-align: middle;
    margin-left: 0.5rem;
}

.prototype-controls-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1.5rem;
    margin-top: 1rem;
    padding: 0.5rem;
    background-color: #333;
    border-radius: 4px;
}

.theme-toggle-mock select,
.language-selector-mock select {
    background-color: #444;
    color: #e0e0e0;
    border: 1px solid #555;
    border-radius: 3px;
    padding: 0.3rem 0.5rem;
    font-size: 0.9rem;
}
.theme-toggle-mock label,
.language-selector-mock label {
    margin-right: 0.5rem;
    font-size: 0.9rem;
}


main {
    display: flex;
    flex-direction: column;
    gap: 1.5rem; /* Reduced gap for prototype compactness */
}

section {
    padding: 1.2rem;
    background-color: #333333;
    border-radius: 6px;
}

#drop-zone {
    border: 2px dashed #555;
    border-radius: 6px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: background-color 0.2s ease-in-out, border-color 0.2s ease-in-out;
    background-color: #3c3c3c;
}

#drop-zone:hover,
#drop-zone.dragover {
    background-color: #444;
    border-color: #61dafb;
}

#drop-zone p { margin: 0.5rem 0 0; font-size: 1rem; color: #c0c0c0; }
.upload-icon { margin-bottom: 0.5rem; width: 40px; height: 40px; opacity: 0.7; }

.file-info-card {
    margin-top: 1rem;
    padding: 1rem;
    background-color: #3c3c3c;
    border-radius: 4px;
    border-left: 4px solid #61dafb;
}
.file-info-card h3 { margin-top: 0; margin-bottom: 0.5rem; color: #61dafb; font-size: 1.1rem; }
.file-info-card p { margin: 0.3rem 0; font-size: 0.95rem; word-break: break-all; }

.button-group { display: flex; justify-content: center; gap: 1rem; margin-top: 1rem; }

button, .button-primary, .button-secondary {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: background-color 0.2s ease, transform 0.1s ease;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
button:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

.button-primary { background-color: #61dafb; color: #1e1e1e; }
.button-primary:hover:not(:disabled) { background-color: #52c0e0; transform: translateY(-1px); }
.button-secondary { background-color: #555; color: #e0e0e0; }
.button-secondary:hover:not(:disabled) { background-color: #666; transform: translateY(-1px); }

#clearFileBtn { margin-top: 0.8rem; padding: 0.5rem 1rem; font-size: 0.9rem; }

.metadata-panels { display: flex; flex-direction: row; gap: 1.5rem; margin-top: 1rem; }
.metadata-panel { flex: 1; padding: 1rem; background-color: #3c3c3c; border-radius: 4px; min-height: 150px; }
.metadata-panel h3 { margin-top: 0; color: #61dafb; font-size: 1.2rem; border-bottom: 1px solid #555; padding-bottom: 0.5rem; margin-bottom: 0.8rem; }
.metadata-panel pre {
    white-space: pre-wrap;
    word-break: break-all;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    font-size: 0.85rem; /* Slightly smaller for more content */
    color: #d0d0d0;
    background-color: #2a2a2a;
    padding: 0.8rem;
    border-radius: 4px;
    overflow-x: auto;
    max-height: 300px; /* Max height for pre in wireframe */
}

.status-message { margin-top: 1rem; padding: 0.75rem; border-radius: 4px; text-align: center; font-size: 0.95rem; }
.status-message.success { background-color: #357a38; color: #e8f5e9; }
.status-message.error { background-color: #c62828; color: #ffcdd2; }

footer {
    text-align: center;
    margin-top: 2rem; /* Ensure space before footer */
    padding: 1.5rem 0;
    background-color: #2a2a2a;
    border-top: 1px solid #444;
    font-size: 0.9rem;
    color: #aaa;
}

/* Prototype specific feature mock styles */
.prototype-feature-section {
    border-top: 1px dashed #555;
    padding-top: 1.5rem;
}
.prototype-feature-section h3 {
    color: #80deea; /* Different accent for planned features */
    text-align: center;
    margin-bottom: 1rem;
}
.profile-options {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 1rem;
}
.profile-options label {
    background-color: #424242;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: not-allowed;
}
.profile-options input[type="checkbox"] {
    margin-right: 0.5rem;
    accent-color: #61dafb;
}
#batch-file-list-mock ul {
    list-style-type: none;
    padding: 0;
    font-size: 0.9rem;
    color: #ccc;
}
#batch-file-list-mock li {
    background-color: #2a2a2a;
    padding: 0.3rem 0.6rem;
    margin-bottom: 0.3rem;
    border-radius: 3px;
}


/* Styles for Project Vision content */
.vision-content {
    background-color: #2a2a2a;
    padding: 2rem;
    border-radius: 8px;
}
.vision-content header h1 {
    font-size: 2.2rem;
    color: #61dafb;
    text-align: center;
    margin-bottom: 1.5rem;
}
.vision-content h2 {
    color: #61dafb;
    font-size: 1.8rem;
    margin-top: 2rem;
    margin-bottom: 0.8rem;
    border-bottom: 1px solid #444;
    padding-bottom: 0.4rem;
}
.vision-content h3 {
    color: #80deea;
    font-size: 1.4rem;
    margin-top: 1.5rem;
    margin-bottom: 0.6rem;
}
.vision-content p, .vision-content li {
    color: #d0d0d0;
    font-size: 1rem;
    margin-bottom: 0.8rem;
}
.vision-content strong {
    color: #e0e0e0;
    font-weight: 600;
}
.vision-content ul, .vision-content ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}
.vision-content ul li ul, .vision-content ol li ul {
    margin-top: 0.5rem;
}
.vision-content blockquote {
    border-left: 3px solid #61dafb;
    padding-left: 1rem;
    margin-left: 0;
    font-style: italic;
    color: #b0b0b0;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .prototype-nav {
        flex-direction: column;
        gap: 0;
    }
    .nav-button {
        border-radius: 0;
        border-bottom: 1px solid #333;
    }
    .nav-button.active {
        border-left: 3px solid #61dafb;
        border-right: 3px solid #61dafb;
    }

    .container { width: 95%; margin: 1rem auto; padding: 1rem; }
    header h1 { font-size: 2rem; }
    .prototype-controls-bar { flex-direction: column; gap: 0.5rem; }
    .metadata-panels { flex-direction: column; }
    .button-group { flex-direction: column; }
    button, .button-primary, .button-secondary { width: 100%; }
    .vision-content { padding: 1rem; }
    .vision-content header h1 { font-size: 1.8rem; }
    .vision-content h2 { font-size: 1.5rem; }
    .vision-content h3 { font-size: 1.2rem; }
}