/* Modern, professional styling for Age Estimation Demo */
:root {
    --primary-color: #3a86ff;
    --primary-dark: #2667cc;
    --secondary-color: #ff006e;
    --accent-color: #8338ec;
    --light-bg: #f8f9fa;
    --dark-bg: #212529;
    --text-color: #343a40;
    --light-text: #f8f9fa;
    --border-color: #dee2e6;
    --success-color: #38b000;
    --error-color: #d00000;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-color);
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    background-color: var(--light-bg);
    line-height: 1.6;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--box-shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 40px;
    width: auto;
}

header h1 {
    margin: 0;
    font-size: 1.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
}

#settings-button, #language-button {
    background-color: transparent;
    border: 2px solid white;
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

#settings-button:hover, #language-button:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

main {
    flex-grow: 1;
    padding: 2rem;
    display: flex;
    gap: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

@media (max-width: 768px) {
    main {
        flex-direction: column;
    }
}

#image-input, #results {
    background-color: white;
    border-radius: 8px;
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    flex: 1;
}

section h2 {
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 1.4rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

/* Image upload styling */
#image-upload {
    display: none; /* Hide the default file input */
}

.upload-container {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    margin-bottom: 1rem;
}

.upload-container:hover {
    border-color: var(--primary-color);
    background-color: rgba(58, 134, 255, 0.05);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.upload-text {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.upload-button {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    display: inline-block;
}

.upload-button:hover {
    background-color: var(--primary-dark);
}

/* Results styling */
#results {
    display: flex;
    flex-direction: column;
}

#image-display {
    margin-bottom: 1.5rem;
    border-radius: 8px;
    padding: 1rem;
    min-height: 200px;
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    text-align: center;
    background-color: var(--light-bg);
}

#uploaded-image {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

#estimation-output {
    font-family: 'Consolas', 'Monaco', monospace;
    white-space: pre-wrap;
    background-color: var(--light-bg);
    padding: 1rem;
    border-radius: 6px;
    min-height: 100px;
    overflow-x: auto;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--primary-color);
}

#generate-pdf-button {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
    align-self: flex-start;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#generate-pdf-button:hover {
    background-color: #d90057;
    transform: translateY(-2px);
}

#generate-pdf-button:active {
    transform: translateY(0);
}

/* Language selector styling */
.language-selector {
    position: relative;
}

#language-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background-color: white;
    border-radius: 4px;
    box-shadow: var(--box-shadow);
    margin-top: 0.5rem;
    z-index: 200;
    min-width: 150px;
    max-height: 300px;
    overflow-y: auto;
    transition: var(--transition);
    opacity: 1;
    transform: translateY(0);
}

#language-dropdown.hidden {
    display: none;
    opacity: 0;
    transform: translateY(-10px);
}

#language-dropdown ul {
    list-style: none;
    padding: 0;
}

#language-dropdown li {
    padding: 0.75rem 1rem;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-color);
}

#language-dropdown li:hover {
    background-color: var(--light-bg);
    color: var(--primary-color);
}

#language-dropdown li.active {
    background-color: var(--primary-color);
    color: white;
}

/* Settings Panel */
#settings-panel {
    position: fixed;
    top: 0;
    right: 0;
    height: 100vh;
    width: 350px;
    background-color: white;
    box-shadow: -2px 0 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    padding: 2rem;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    overflow-y: auto;
}

#settings-panel.visible {
    transform: translateX(0);
}

#settings-panel.hidden {
    transform: translateX(100%);
}

#settings-panel h2 {
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

#settings-panel label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

#settings-panel input {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1.5rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    transition: var(--transition);
}

#settings-panel input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(58, 134, 255, 0.2);
}

#settings-panel button {
    padding: 0.75rem 1.5rem;
    margin-right: 0.5rem;
    cursor: pointer;
    border-radius: 4px;
    font-weight: 500;
    transition: var(--transition);
}

#save-api-key {
    background-color: var(--success-color);
    color: white;
    border: none;
}

#save-api-key:hover {
    background-color: #2d9300;
}

#close-settings {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

#close-settings:hover {
    background-color: var(--light-bg);
}

/* Loading indicator */
.loading {
    display: inline-block;
    width: 1.5rem;
    height: 1.5rem;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Status messages */
.status {
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.status-success {
    background-color: rgba(56, 176, 0, 0.1);
    border-left: 4px solid var(--success-color);
    color: var(--success-color);
}

.status-error {
    background-color: rgba(208, 0, 0, 0.1);
    border-left: 4px solid var(--error-color);
    color: var(--error-color);
}

/* Additional utility classes for drag and drop */
.drag-over {
    border-color: var(--primary-color) !important;
    background-color: rgba(58, 134, 255, 0.1) !important;
}

.processing {
    opacity: 0.7;
    pointer-events: none;
}

/* Results container to organize multiple face results */
.results-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
    margin-bottom: 1rem;
}

.result-card {
    background-color: white;
    border-radius: 6px;
    padding: 12px;
    margin-bottom: 12px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: relative;
    border: 3px solid var(--primary-color); /* This will be overridden with inline style */
}

.face-number {
    position: absolute;
    top: -10px;
    left: 10px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: bold;
    font-size: 0.85rem;
}

/* Face crop image styling */
.face-crop-container {
    margin: 0 0 8px 0;
    display: flex;
    justify-content: center;
    background-color: var(--light-bg);
    border-radius: 4px;
    overflow: hidden;
}

.face-crop {
    max-width: 100%;
    max-height: 150px;
    object-fit: contain;
    border-radius: 4px;
}

.result-card h3 {
    margin: 3px 0 8px 0;
    font-size: 1.1rem;
    padding-left: 1.5rem;
    text-align: center;
}

.result-item {
    margin: 0 0 6px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px dotted var(--border-color);
    padding-bottom: 0.2rem;
}

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

.result-value {
    font-weight: 600;
    color: var(--primary-color);
}

details {
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
    padding-top: 0.5rem;
}

summary {
    cursor: pointer;
    color: var(--accent-color);
    font-weight: 500;
}

.info-box {
    margin-top: 2rem;
    padding: 1.5rem;
    background-color: rgba(58, 134, 255, 0.05);
    border-left: 4px solid var(--primary-color);
    border-radius: 4px;
}

.info-box h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 600;
}

.info-box p, .info-box ul {
    color: var(--text-color);
    margin-bottom: 1rem;
}

.info-box ul {
    padding-left: 1.5rem;
}

.info-box li {
    margin-bottom: 0.5rem;
    color: var(--text-color);
}

/* Footer */
footer {
    background-color: var(--dark-bg);
    color: var(--light-text);
    text-align: center;
    padding: 1.5rem 0;
    margin-top: auto;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}