/* Reset y base */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: 'Segoe UI', system-ui, sans-serif;
    min-height: 100vh;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
}

.container {
    background: white;
    border-radius: 24px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
    padding: 40px;
    max-width: 600px;
    width: 100%;
    text-align: center;
    transition: all 0.3s ease;
}

h1 {
    font-size: 2rem;
    margin-bottom: 10px;
    color: #2d3748;
}

.subtitle {
    color: #718096;
    margin-bottom: 30px;
}

/* Zona de carga */
.upload-area {
    border: 3px dashed #cbd5e0;
    border-radius: 16px;
    padding: 40px 20px;
    margin-bottom: 20px;
    cursor: pointer;
    transition: all 0.3s;
    background: #f7fafc;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: #667eea;
    background: #edf2ff;
}

.upload-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.upload-area p {
    color: #4a5568;
    font-weight: 500;
}

.upload-area span {
    color: #667eea;
    text-decoration: underline;
}

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

/* Vista previa */
.preview-section {
    display: none;
    margin-bottom: 20px;
}

.preview-section.active {
    display: block;
}

.preview-image {
    width: 100%;
    height: 300px;
    object-fit: contain;
    border-radius: 16px;
    background: #edf2f7;
    border: 2px solid #e2e8f0;
}

/* Botón predecir */
.btn-predict {
    background: #667eea;
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    width: 100%;
    margin-top: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-predict:hover {
    background: #5a67d8;
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(102,126,234,0.3);
}

.btn-predict:disabled {
    background: #a0aec0;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* Spinner */
.spinner {
    display: none;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid white;
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
}

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

/* Resultados */
.result-section {
    display: none;
    background: #f7fafc;
    border-radius: 16px;
    padding: 24px;
    margin-top: 20px;
    text-align: left;
}

.result-section.active {
    display: block;
}

.result-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.result-icon {
    font-size: 36px;
}

.result-prediction {
    font-size: 1.5rem;
    font-weight: 700;
    color: #2d3748;
}

.confidence-bar-container {
    background: #e2e8f0;
    border-radius: 12px;
    height: 12px;
    margin-bottom: 12px;
    overflow: hidden;
}

.confidence-bar {
    height: 100%;
    border-radius: 12px;
    width: 0%;
    background: linear-gradient(90deg, #48bb78, #38a169);
    transition: width 0.8s ease;
}

.confidence-text {
    color: #4a5568;
    margin-bottom: 12px;
}

/* Lista de probabilidades */
.probabilities {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.prob-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.prob-label {
    display: flex;
    align-items: center;
    gap: 8px;
}

.prob-value {
    font-weight: 600;
}

/* Botón "Subir otra imagen" */
.upload-another {
    display: none;
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
    padding: 8px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    margin-top: 16px;
    transition: 0.2s;
}

.upload-another:hover {
    background: #667eea;
    color: white;
}

/* Responsive */
@media (max-width: 500px) {
    .container {
        padding: 24px;
    }
    h1 {
        font-size: 1.5rem;
    }
    .upload-area {
        padding: 24px 16px;
    }
}