/* Upload Proposal Button Styles */
.proposal-upload-container {
    max-width: 400px;
    margin: 20px auto;
    padding: 20px;
    text-align: center;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

.proposal-upload-description {
    margin-bottom: 20px;
    color: #666;
    font-size: 14px;
    line-height: 1.5;
}

.proposal-upload-description p {
    margin: 0;
}

.proposal-upload-button {
    background: linear-gradient(135deg, #8B5CF6 0%, #3B82F6 100%);
    color: white;
    border: none;
    padding: 15px 30px;
    font-size: 16px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
    position: relative;
    overflow: hidden;
    min-width: 200px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.proposal-upload-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(139, 92, 246, 0.4);
    background: linear-gradient(135deg, #7C3AED 0%, #2563EB 100%);
}

.proposal-upload-button:active {
    transform: translateY(0);
    box-shadow: 0 2px 10px rgba(139, 92, 246, 0.3);
}

.proposal-upload-button:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.proposal-upload-button .button-text {
    display: block;
}

.proposal-upload-button .upload-spinner {
    display: none;
    align-items: center;
    gap: 10px;
}

.proposal-upload-button.uploading .button-text {
    display: none;
}

.proposal-upload-button.uploading .upload-spinner {
    display: flex;
}

/* Spinner Animation */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top: 2px solid white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Upload Status Messages */
.upload-status {
    margin-top: 15px;
    padding: 12px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-align: center;
}

.upload-status.success {
    background-color: #D1FAE5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.upload-status.error {
    background-color: #FEE2E2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.upload-status.info {
    background-color: #DBEAFE;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

/* File Input Styling */
#proposal-file-input {
    display: none;
}

/* Responsive Design */
@media (max-width: 480px) {
    .proposal-upload-container {
        margin: 10px;
        padding: 15px;
    }
    
    .proposal-upload-button {
        padding: 12px 24px;
        font-size: 14px;
        min-width: 180px;
        height: 45px;
    }
}

/* Focus States for Accessibility */
.proposal-upload-button:focus {
    outline: 2px solid #8B5CF6;
    outline-offset: 2px;
}

/* Loading State Overlay */
.proposal-upload-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.proposal-upload-button:hover::before {
    left: 100%;
}

/* File Type Validation Message */
.file-validation-message {
    margin-top: 10px;
    font-size: 12px;
    color: #666;
    font-style: italic;
}

/* Success Animation */
@keyframes successPulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.upload-status.success {
    animation: successPulse 0.6s ease-in-out;
}

/* Error Shake Animation */
@keyframes errorShake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

.upload-status.error {
    animation: errorShake 0.5s ease-in-out;
}