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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #10b981;
    --background: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, rgba(255,255,255,0.95) 0%, rgba(248,250,252,0.95) 100%);
    min-height: 100vh;
}

body.with-background {
    background-image: url('/static/foggy_birds2.jpg');
    background-repeat: repeat;
    background-attachment: fixed;
}

body.with-background::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.30) 0%, rgba(248,250,252,0.25) 100%);
    z-index: -1;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 0.25rem 0;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
}

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo {
    height: 120px;
    width: auto;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s;
    padding: 0.5rem 1rem;
    border-radius: 0.5rem;
}

.nav-links a:hover {
    color: var(--primary-color);
    background: rgba(37, 99, 235, 0.1);
}

.hero {
    text-align: center;
    padding: 4rem 0 2rem;
}

.hero h1 {
    font-size: 3rem;
    font-weight: 800;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.main-content {
    padding: 2rem 0 4rem;
}

.card {
    background: white;
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.upload-area {
    border: 3px dashed var(--border-color);
    border-radius: 1rem;
    padding: 3rem 2rem;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    background: rgba(249, 250, 251, 0.5);
}

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

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

.upload-text {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-subtext {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn {
    display: inline-block;
    padding: 0.75rem 2rem;
    border-radius: 0.5rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

.sample-images {
    margin-top: 3rem;
}

.sample-images h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

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

.sample-item {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
    box-shadow: var(--shadow);
}

.sample-item:hover {
    transform: scale(1.05);
}

.sample-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
}

.samples-grid-portrait {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    max-width: 650px;
    margin: 0 auto;
}

.sample-item-portrait {
    position: relative;
    border-radius: 0.5rem;
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
    box-shadow: var(--shadow);
    background: white;
}

.sample-item-portrait:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.sample-item-portrait img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.result-card {
    background: white;
    border-radius: 1rem;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s;
}

.result-card:hover {
    transform: translateY(-5px);
}

.result-image {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.result-content {
    padding: 1.5rem;
}

.result-rank {
    display: inline-block;
    background: var(--primary-color);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 1rem;
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.result-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.result-scientific {
    font-style: italic;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.confidence-bar {
    background: var(--border-color);
    height: 8px;
    border-radius: 1rem;
    overflow: hidden;
    margin-bottom: 0.5rem;
}

.confidence-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success-color), var(--primary-color));
    transition: width 1s ease-out;
}

.confidence-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.result-link {
    display: inline-block;
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.result-link:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 2rem;
    margin-top: 2rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.about-content p {
    margin-bottom: 1rem;
    line-height: 1.8;
    color: var(--text-secondary);
}

.about-content a {
    color: var(--primary-color);
    text-decoration: none;
}

.about-content a:hover {
    text-decoration: underline;
}

.loading {
    text-align: center;
    padding: 3rem;
}

.spinner {
    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: 0 auto 1rem;
}

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

.hidden {
    display: none !important;
}

#file-input {
    display: none;
}

.preview-container {
    margin-top: 1.5rem;
    text-align: center;
}

.preview-image {
    max-width: 100%;
    max-height: 300px;
    border-radius: 0.5rem;
    box-shadow: var(--shadow);
}

@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
    
    .samples-grid-portrait {
        grid-template-columns: repeat(3, 1fr);
        max-width: 100%;
        gap: 0.75rem;
    }
    
    .logo {
        height: 90px;
    }
}

@media (max-width: 480px) {
    .samples-grid-portrait {
        grid-template-columns: repeat(3, 1fr);
        max-width: 100%;
        gap: 0.5rem;
    }
}

/* Processing Overlay */
.processing-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.85);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.3s ease-out;
}

.processing-content {
    text-align: center;
    background: white;
    padding: 3rem 4rem;
    border-radius: 1.5rem;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    max-width: 500px;
}

.processing-spinner {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 2rem;
}

.spinner-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 3.5rem;
    animation: pulse 2s ease-in-out infinite;
}

.processing-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.processing-text {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.processing-dots {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
}

.processing-dots span {
    width: 12px;
    height: 12px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite;
}

.processing-dots span:nth-child(1) {
    animation-delay: 0s;
}

.processing-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.processing-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
    }
}

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}