@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&family=Lora:wght@400;500&display=swap');

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #faf9f5;
    --bg-secondary: white;
    --text-primary: #141413;
    --text-secondary: #b0aea5;
    --accent-color: #d97757;
    --accent-secondary: #6a9bcc;
    --accent-success: #788c5d;
    --border-color: #e8e6dc;
    --shadow-sm: 0 2px 12px rgba(20, 20, 19, 0.08);
    --shadow-md: 0 4px 20px rgba(20, 20, 19, 0.08);
    --shadow-lg: 0 6px 20px rgba(20, 20, 19, 0.15);
    --transition: all 0.3s ease;
}

body {
    font-family: 'Lora', Georgia, serif;
    background: linear-gradient(135deg, #faf9f5 0%, #e8e6dc 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

h1, h2, h3 {
    font-family: 'Poppins', Arial, sans-serif;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 2rem;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 4rem;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Upload Section */
.upload-section {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 3rem;
    margin-bottom: 3rem;
    box-shadow: var(--shadow-md);
}

.upload-zone {
    border: 2px dashed var(--accent-color);
    border-radius: 12px;
    padding: 4rem 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    background: var(--bg-secondary);
}

.upload-zone:hover,
.upload-zone.drag-over {
    border-color: var(--accent-secondary);
    background: var(--bg-primary);
}

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

.upload-text {
    font-size: 1.25rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.upload-subtext {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.browse-button {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0.875rem 2rem;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.browse-button:hover {
    background: #c56645;
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.browse-button:active {
    transform: translateY(0);
}

/* Preview Section */
.preview-section {
    text-align: center;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.preview-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.clear-button {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.clear-button:hover {
    color: var(--text-primary);
    border-color: var(--text-primary);
}

#previewImage {
    max-width: 100%;
    max-height: 500px;
    border-radius: 8px;
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.search-button {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 1rem 3rem;
    border-radius: 8px;
    font-size: 1.125rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-md);
}

.search-button:hover {
    background: #c56645;
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.search-button:active {
    transform: translateY(0);
}

/* Results Section */
.results-section {
    margin-top: 4rem;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: var(--bg-primary);
    border-radius: 12px;
}

.results-header h2 {
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.results-count {
    color: var(--accent-color);
    font-size: 1.2rem;
    font-weight: 600;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 1.5rem;
}

.result-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
}

.result-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.result-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
}

.result-card-footer {
    padding: 1rem;
    text-align: center;
}

.similarity-score {
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.95rem;
}

.confidence {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
    margin-top: 0.5rem;
}

.confidence.high {
    background: var(--accent-success);
    color: white;
}

.confidence.medium {
    background: var(--accent-secondary);
    color: white;
}

.confidence.low {
    background: var(--text-secondary);
    color: white;
}

.btn-secondary {
    font-family: 'Poppins', Arial, sans-serif;
    background: var(--accent-secondary);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: var(--transition);
}

.btn-secondary:hover {
    background: #5889b8;
    transform: translateY(-2px);
}

.btn-secondary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.show-more-container {
    grid-column: 1 / -1;
    display: flex;
    justify-content: center;
    margin-top: 2rem;
}

/* Footer */
footer {
    text-align: center;
    margin-top: 5rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Loading Animation */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.loading {
    animation: pulse 1.5s ease-in-out infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 1.5rem 1rem;
    }

    header {
        margin-bottom: 2rem;
    }

    header h1 {
        font-size: 1.75rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .upload-section {
        padding: 1.5rem 1rem;
        margin-bottom: 2rem;
    }

    .upload-zone {
        padding: 2rem 1rem;
    }

    .upload-text {
        font-size: 1.1rem;
    }

    .browse-button {
        padding: 0.75rem 1.5rem;
        font-size: 0.95rem;
    }

    #previewImage {
        max-height: 350px;
    }

    .search-button {
        padding: 0.875rem 2rem;
        font-size: 1rem;
        width: 100%;
    }

    .preview-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
    }

    .results-section {
        margin-top: 2rem;
    }

    .results-header {
        flex-direction: column;
        gap: 1rem;
        align-items: flex-start;
        padding: 1rem;
    }

    .results-header h2 {
        font-size: 1.5rem;
    }

    .results-count {
        font-size: 1rem;
    }

    .results-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
        gap: 1rem;
    }

    .result-card img {
        height: 180px;
    }

    .result-card-footer {
        padding: 0.75rem;
    }

    .confidence {
        font-size: 0.75rem;
        padding: 0.2rem 0.6rem;
    }

    .btn-secondary {
        padding: 0.625rem 1.5rem;
        font-size: 0.9rem;
        width: 100%;
    }

    footer {
        margin-top: 3rem;
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 1rem 0.75rem;
    }

    header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .upload-section {
        padding: 1rem;
        border-radius: 12px;
    }

    .upload-zone {
        padding: 1.5rem 0.75rem;
    }

    .upload-icon {
        width: 48px;
        height: 48px;
    }

    .upload-text {
        font-size: 1rem;
    }

    .upload-subtext {
        font-size: 0.9rem;
    }

    .browse-button {
        padding: 0.7rem 1.25rem;
        font-size: 0.9rem;
    }

    #previewImage {
        max-height: 300px;
    }

    .search-button {
        padding: 0.8rem 1.5rem;
        font-size: 0.95rem;
    }

    .results-header h2 {
        font-size: 1.25rem;
    }

    .results-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.75rem;
    }

    .result-card {
        border-radius: 8px;
    }

    .result-card img {
        height: 150px;
    }

    .result-card-footer {
        padding: 0.5rem;
    }

    .confidence {
        font-size: 0.7rem;
    }

    .show-more-container {
        margin-top: 1rem;
    }
}