:root {
    --primary-red: #ef4444;
    --primary-green: #10b981;
    --dark-bg: #0f172a;
    --card-bg: #1e293b;
    --border-color: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --warning-orange: #f59e0b;
    --danger-red: #dc2626;
    --success-green: #059669;
    --gradient-start: #6366f1;
    --gradient-end: #8b5cf6;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem 1rem;
    line-height: 1.6;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* Header Styles */
.header {
    text-align: center;
    margin-bottom: 3rem;
    animation: fadeInDown 0.6s ease-out;
}

.header-content {
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    padding: 2.5rem 2rem;
    border-radius: 1rem;
    box-shadow: 0 20px 60px rgba(99, 102, 241, 0.3);
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #ffffff, #e0e7ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.125rem;
    color: #e0e7ff;
    font-weight: 500;
}

/* Demo Mode Section */
.demo-mode-section {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.demo-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    user-select: none;
}

.demo-toggle input[type="checkbox"] {
    display: none;
}

.toggle-slider {
    position: relative;
    width: 50px;
    height: 26px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 13px;
    transition: all 0.3s ease;
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: white;
    top: 3px;
    left: 3px;
    transition: all 0.3s ease;
}

.demo-toggle input:checked+.toggle-slider {
    background: rgba(16, 185, 129, 0.5);
}

.demo-toggle input:checked+.toggle-slider::before {
    transform: translateX(24px);
    background: #10b981;
}

.toggle-label {
    font-size: 1rem;
    font-weight: 600;
    color: #e0e7ff;
}

.demo-buttons {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.3s ease-out;
}

.demo-btn {
    padding: 0.75rem 1.5rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 0.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    backdrop-filter: blur(10px);
}

.demo-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.demo-btn.blocked-demo {
    border-color: rgba(239, 68, 68, 0.5);
}

.demo-btn.blocked-demo:hover {
    background: rgba(239, 68, 68, 0.2);
    border-color: #ef4444;
}

.demo-btn.safe-demo {
    border-color: rgba(16, 185, 129, 0.5);
}

.demo-btn.safe-demo:hover {
    background: rgba(16, 185, 129, 0.2);
    border-color: #10b981;
}


/* Input Section */
.input-section {
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease-out 0.2s both;
}

.upload-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: all 0.3s ease;
}

.upload-card:hover {
    border-color: var(--gradient-start);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.2);
}

.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 0.75rem;
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
    background: rgba(99, 102, 241, 0.05);
}

.upload-area:hover {
    border-color: var(--gradient-start);
    background: rgba(99, 102, 241, 0.1);
}

.upload-area.drag-over {
    border-color: var(--gradient-start);
    background: rgba(99, 102, 241, 0.15);
    transform: scale(1.02);
}

.upload-icon {
    width: 4rem;
    height: 4rem;
    color: var(--gradient-start);
    margin-bottom: 1rem;
}

.upload-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

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

.file-info {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    animation: slideIn 0.3s ease-out;
}

.file-icon {
    width: 2rem;
    height: 2rem;
    color: var(--gradient-start);
    flex-shrink: 0;
}

.file-info span {
    flex: 1;
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.remove-file {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    border-radius: 0.25rem;
    transition: all 0.2s ease;
}

.remove-file:hover {
    background: rgba(239, 68, 68, 0.2);
    color: var(--primary-red);
}

.scan-button {
    width: 100%;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    color: white;
    border: none;
    border-radius: 0.5rem;
    font-size: 1.125rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.scan-button:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

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

.button-loader {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.spinner {
    width: 1rem;
    height: 1rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* Results Section */
.results-section {
    animation: fadeInUp 0.6s ease-out;
}

.results-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

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

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

.result-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.result-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.result-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

.similarity-bar {
    position: relative;
    width: 100%;
    height: 2rem;
    background: rgba(148, 163, 184, 0.1);
    border-radius: 0.5rem;
    overflow: hidden;
}

.similarity-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--gradient-start), var(--gradient-end));
    border-radius: 0.5rem;
    transition: width 1s ease-out;
    width: 0;
}

.similarity-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-weight: 700;
    font-size: 0.875rem;
    color: var(--text-primary);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
}

.risk-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 0.375rem;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
}

.risk-badge.low {
    background: rgba(16, 185, 129, 0.2);
    color: var(--primary-green);
}

.risk-badge.medium {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning-orange);
}

.risk-badge.high {
    background: rgba(239, 68, 68, 0.2);
    color: var(--primary-red);
}

.score-value {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.decision-item {
    grid-column: 1 / -1;
}

.decision-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: 0.5rem;
    font-weight: 700;
    font-size: 1.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.decision-badge.blocked {
    background: linear-gradient(135deg, #dc2626, #ef4444);
    color: white;
}

.decision-badge.safe {
    background: linear-gradient(135deg, #059669, #10b981);
    color: white;
}

/* Explanation Section */
.explanation-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: 1rem;
    padding: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.explanation-title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.explanation-text {
    color: var(--text-secondary);
    line-height: 1.8;
    font-size: 1rem;
}

/* Animations */
@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);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

/* Responsive Design */
@media (max-width: 768px) {
    .title {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .upload-card {
        padding: 1.5rem;
    }

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