:root {
    --deep-marine-blue: #003473;
    --dark-olive-green: #425500;
    --dark-olive-green-transparent: #42550033;
    --bright-lime-green: #84BD00;
    --bright-lime-green-transparent: #84BD0033;
    --light-gray: #f5f5f5;
    --medium-gray: #e0e0e0;
    --dark-gray: #333333;
    --white: #ffffff;
    --shadow: rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Open Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--light-gray);
    color: var(--dark-gray);
    line-height: 1.6;
}

.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

header {
    background: linear-gradient(135deg, var(--deep-marine-blue) 0%, var(--dark-olive-green) 100%);
    color: var(--white);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 2px 10px var(--shadow);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

.logo {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--white);
    padding: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    transition: var(--transition);
}

.logo:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.header-text {
    text-align: left;
}

header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    animation: fadeInDown 0.8s ease;
}

header .subtitle {
    font-size: 1.1rem;
    font-weight: 300;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease;
}

main {
    flex: 1;
    padding: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
}

.upload-section {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow);
    margin-bottom: 2rem;
    animation: fadeIn 0.5s ease;
}

.upload-section h2 {
    color: var(--deep-marine-blue);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 600;
}

/* Introduction Section */
.intro-section {
    text-align: center;
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 2px solid var(--light-gray);
}

.intro-section h2 {
    color: var(--deep-marine-blue);
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    margin-bottom: 1rem;
}

.intro-text {
    color: var(--dark-gray);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 800px;
    margin: 0 auto;
    opacity: 0.9;
}

/* Config Sections */
.config-section {
    background: var(--light-gray);
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    border-left: 4px solid var(--deep-marine-blue);
    overflow: hidden;
    transition: all 0.3s ease;
}

.config-section.collapsed .config-content,
.config-section.collapsed .upload-container {
    max-height: 0;
    opacity: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.config-section.collapsed {
    margin-bottom: 0.75rem;
}

.config-section.collapsed h3 {
    margin-bottom: 0;
}

.config-section h3:hover {
    color: var(--bright-lime-green);
}

.config-section.collapsed .expand-icon {
    transform: rotate(-90deg);
}

.config-section h3 {
    color: var(--deep-marine-blue);
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.1rem;
}

.config-content {
    background: var(--white);
    border-radius: 6px;
    padding: 1.5rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group:last-child {
    margin-bottom: 0;
}

.input-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: 0.5rem;
}

.input-group > label:first-of-type {
    font-weight: 700;
    color: var(--deep-marine-blue);
}

.input-group input[type="text"] {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid var(--medium-gray);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
    background: var(--white);
}

.input-group input[type="text"]:focus {
    outline: none;
    border-color: var(--deep-marine-blue);
    box-shadow: 0 0 0 3px rgba(0, 52, 115, 0.1);
}

.preparer-fields {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.upload-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.upload-box {
    border: 2px dashed var(--deep-marine-blue);
    border-radius: 8px;
    padding: 1.5rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    background: var(--deep-marine-blue);
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.upload-box.compact {
    min-height: 120px;
    padding: 1rem;
}

.upload-box:hover {
    border-color: var(--deep-marine-blue);
    background-color: var(--dark-olive-green);
    transform: translateY(-2px);
    color: white;
}

.upload-box.active {
    border-color: var(--bright-lime-green);
    background-color: var(--bright-lime-green-transparent);
}

.upload-box.active .upload-icon,
.upload-box.active h3,
.upload-box.active h4,
.upload-box.active p,
.upload-box.active .file-info {
    color: var(--deep-marine-blue);
}

.upload-box.active .file-info {
    opacity: 1;
}

.upload-icon {
    font-size: 2rem;
    color: var(--white);
    margin-bottom: 0;
}

.upload-box h3,
.upload-box h4 {
    color: var(--white);
    margin-bottom: 0.0rem;
    font-size: 1.25rem;
    font-weight: 100;
}

.upload-box p {
    color: var(--white);
    margin-bottom: 0;
    opacity: 0.9;
    font-size: 0.85rem;
    line-height: 1;
}

.upload-box input[type="file"] {
    display: none;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn.btn-outline {
    background-color: transparent;
    border: 2px solid;
    text-decoration: none;
}

.btn.btn-outline:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-1px);
}

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

.btn-primary:hover {
    background-color: #002456;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 52, 115, 0.3);
}

.btn-success {
    background-color: var(--bright-lime-green);
    color: var(--dark-gray);
    font-size: 1.1rem;
    padding: 1rem 2rem;
}

.btn-success:hover:not(:disabled) {
    background-color: #6ca000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(132, 189, 0, 0.3);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.action-buttons {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.btn-analyze {
    flex: 1;
    min-width: 200px;
    font-size: 1.1rem;
    padding: 1rem 2rem;
}

.btn-compact {
    flex: 0 0 auto;
    min-width: 180px;
    max-width: 220px;
    padding: 0.8rem 1.5rem;
    font-size: 1rem;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    min-width: auto;
}

.btn-demo {
    background-color: var(--medium-gray);
    color: var(--dark-gray);
    padding: 1rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    min-width: 180px;
    justify-content: center;
}

.btn-demo:hover {
    background-color: #d0d0d0;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.file-info {
    margin-top: 1rem;
    font-size: 0.9rem;
    font-weight: 500;
}

.upload-box .file-info {
    color: var(--white);
    opacity: 0.95;
}

.upload-box .file-info ul {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0 0 0;
}

.upload-box .file-info ul li {
    padding: 0.2rem 0;
    font-size: 0.75rem;
    opacity: 0.9;
}

.client-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--medium-gray);
}

.client-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--deep-marine-blue);
}

.client-section input {
    width: 100%;
    max-width: 500px;
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}

.client-section input:focus {
    outline: none;
    border-color: var(--bright-lime-green);
    box-shadow: 0 0 0 3px rgba(132, 189, 0, 0.1);
}

.client-section small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-style: italic;
}

.api-key-section {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--medium-gray);
}

.api-key-section label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--deep-marine-blue);
}

.api-key-section input {
    width: 100%;
    max-width: 500px;
    padding: 0.75rem;
    border: 1px solid var(--medium-gray);
    border-radius: 6px;
    font-size: 1rem;
    transition: var(--transition);
}

.api-key-section input:focus {
    outline: none;
    border-color: var(--bright-lime-green);
    box-shadow: 0 0 0 3px rgba(132, 189, 0, 0.1);
}

.api-key-section small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-style: italic;
}

.loading-section {
    text-align: center;
    padding: 4rem;
}

.loader {
    border: 4px solid var(--medium-gray);
    border-top: 4px solid var(--bright-lime-green);
    border-radius: 50%;
    width: 60px;
    height: 60px;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

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

.results-section {
    background: var(--white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px var(--shadow);
    animation: fadeIn 0.5s ease;
}

.results-section h2 {
    color: var(--deep-marine-blue);
    margin-bottom: 1.5rem;
    font-size: 1.8rem;
    font-weight: 600;
}

.report-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--medium-gray);
    overflow-x: auto;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    background: none;
    border: none;
    color: var(--dark-gray);
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}

.tab-btn:hover {
    color: var(--deep-marine-blue);
}

.tab-btn.active {
    color: var(--deep-marine-blue);
    border-bottom-color: var(--bright-lime-green);
}

.report-content {
    min-height: 400px;
    padding: 2rem 0;
}

.export-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 2px solid var(--medium-gray);
}

.export-section h3 {
    color: var(--deep-marine-blue);
    margin-bottom: 1rem;
}

.export-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn-export {
    background-color: var(--dark-olive-green);
    color: var(--white);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-export:hover {
    background-color: #354400;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(66, 85, 0, 0.3);
}

.btn-print {
    background-color: var(--bright-lime-green);
    color: var(--dark-gray);
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 6px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-print:hover {
    background-color: #6ca000;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(132, 189, 0, 0.3);
}

.btn-debug {
    background-color: #6c757d !important;
    color: var(--white) !important;
}

.btn-debug:hover {
    background-color: #5a6268 !important;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(108, 117, 125, 0.3);
}

footer {
    background-color: var(--deep-marine-blue);
    color: var(--white);
    text-align: center;
    padding: 1.5rem;
    margin-top: auto;
}

footer p {
    margin: 0;
}

footer a {
    color: var(--bright-lime-green);
    text-decoration: none;
    transition: var(--transition);
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* API Status Indicator */
.api-status {
    margin-bottom: 1rem;
    padding: 0.75rem;
    border-radius: 6px;
    background-color: var(--light-gray);
    border: 1px solid var(--medium-gray);
}

.status-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.status-indicator #status-icon {
    font-size: 0.75rem;
}

.status-indicator.checking #status-icon {
    color: #ffa500;
    animation: pulse 1.5s infinite;
}

.status-indicator.ready {
    background-color: #e8f5e9;
    border-color: var(--bright-lime-green);
}

.status-indicator.ready #status-icon {
    color: var(--bright-lime-green);
    animation: checkmark 0.5s ease-in-out;
}

.status-indicator.unavailable {
    background-color: #ffebee;
    border-color: #dc3545;
}

.status-indicator.unavailable #status-icon {
    color: #dc3545;
}

@keyframes checkmark {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        gap: 1rem;
    }
    
    .header-text {
        text-align: center;
    }
    
    header h1 {
        font-size: 2rem;
    }
    
    .logo {
        width: 60px;
        height: 60px;
    }
    
    .upload-container {
        grid-template-columns: 1fr;
    }
    
    .report-tabs {
        overflow-x: scroll;
        -webkit-overflow-scrolling: touch;
    }
    
    .export-buttons {
        justify-content: center;
    }
    
    /* Stack preparer fields on mobile */
    .preparer-fields {
        grid-template-columns: 1fr;
    }
}