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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: #0a1628;
    color: #e0e0e0;
    overflow-x: hidden;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at 50% 50%, #1a2f4a 0%, #0a1628 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    width: 200%;
    height: 200%;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="1" fill="%23ffffff" opacity="0.1"/></svg>');
    background-size: 50px 50px;
    animation: drift 20s linear infinite;
}

@keyframes drift {
    from { transform: translate(-50%, -50%); }
    to { transform: translate(-50%, -50%) translateX(50px) translateY(50px); }
}

.hero-content {
    text-align: center;
    z-index: 2;
    padding: 2rem;
}

h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #4fc3f7, #29b6f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: fadeInUp 1s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.subtitle {
    font-size: 1.3rem;
    color: #b0bec5;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

/* Access Control Visual */
.circles-container {
    position: relative;
    width: 500px;
    height: 500px;
    margin: 3rem auto;
    animation: fadeInUp 1s ease-out 0.4s both;
    overflow: visible;
}

.circle {
    position: absolute;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    transition: all 0.3s ease;
    cursor: pointer;
}

.rbac {
    width: 180px;
    height: 180px;
    background: rgba(79, 195, 247, 0.2);
    border: 2px dotted #4fc3f7;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
}

.abac {
    width: 300px;
    height: 300px;
    background: rgba(79, 195, 247, 0.1);
    border: 2px solid #4fc3f7;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 2;
}

.pbac {
    width: 420px;
    height: 420px;
    background: rgba(79, 195, 247, 0.05);
    border: 3px solid #29b6f6;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 1;
    box-shadow: 0 0 30px rgba(79, 195, 247, 0.3);
}

.circle:hover {
    transform: translate(-50%, -50%) scale(1.05);
    box-shadow: 0 0 40px rgba(79, 195, 247, 0.5);
}

.circle:hover .circle-label {
    background: rgba(10, 22, 40, 1);
    box-shadow: 0 4px 20px rgba(79, 195, 247, 0.3);
}

.circle-label {
    position: absolute;
    font-size: 0.85rem;
    font-weight: 600;
    text-align: center;
    padding: 0.5rem 1rem;
    background: rgba(10, 22, 40, 0.9);
    border-radius: 8px;
    white-space: nowrap;
    pointer-events: none;
}

.circle-label::before {
    content: '';
    position: absolute;
    width: 2px;
    background: linear-gradient(90deg, transparent, currentColor, currentColor);
    opacity: 0.5;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.7; }
}

/* RBAC Label - Center */
.rbac .circle-label {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: #4fc3f7;
    border: 1px solid rgba(79, 195, 247, 0.5);
}

/* ABAC Label - Left Side */
.abac .circle-label {
    left: -320px;
    top: 50%;
    transform: translateY(-50%);
    color: #4fc3f7;
    border: 1px solid rgba(79, 195, 247, 0.3);
}

.abac .circle-label::before {
    right: -322px;
    top: 50%;
    transform: translateY(-50%);
    height: 2px;
    width: 320px;
    background: linear-gradient(90deg, 
        currentColor 0%, 
        currentColor calc(100% - 150px), 
        transparent calc(100% - 150px));
}

/* PBAC Label - Right Side */
.pbac .circle-label {
    right: -240px;
    top: 50%;
    transform: translateY(-50%);
    color: #29b6f6;
    border: 1px solid rgba(41, 182, 246, 0.3);
}

.pbac .circle-label::before {
    left: -32px;
    top: 50%;
    transform: translateY(-50%);
    height: 2px;
    width: 30px;
    background: linear-gradient(90deg, transparent, currentColor, currentColor);
}

/* Section Styles */
.section {
    padding: 5rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 2rem;
    text-align: center;
    color: #4fc3f7;
}

/* Comparison Cards */
.comparison-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 15px;
    padding: 2rem;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #4fc3f7, #29b6f6);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(79, 195, 247, 0.2);
}

.card:hover::before {
    transform: scaleX(1);
}

.card-title {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #4fc3f7;
}

.card-content {
    color: #b0bec5;
    line-height: 1.6;
}

.pros-cons {
    margin-top: 1rem;
}

.highlights, .considerations {
    margin-top: 0.5rem;
}

.highlights li {
    color: #4caf50;
}

.considerations li {
    color: #f44336;
}

/* Demo Section */
.demo-section {
    background: rgba(255, 255, 255, 0.02);
    border-radius: 20px;
    padding: 3rem;
    margin-top: 3rem;
}

.demo-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    .demo-container {
        grid-template-columns: 1fr;
    }
    
    .circles-container {
        width: 350px;
        height: 350px;
    }
    
    .rbac {
        width: 120px;
        height: 120px;
    }
    
    .abac {
        width: 200px;
        height: 200px;
    }
    
    .pbac {
        width: 280px;
        height: 280px;
    }
    
    .circle-label {
        font-size: 0.75rem;
        padding: 0.3rem 0.6rem;
    }
    
    .abac .circle-label {
        left: -210px;
    }
    
    .pbac .circle-label {
        right: -170px;
    }
    
    .abac .circle-label::before {
        width: 180px;
        right: -182px;
    }
    
    .pbac .circle-label::before {
        width: 30px;
        left: -32px;
    }
}

.policy-creator {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 2rem;
}

.policy-input {
    width: 100%;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-size: 1rem;
    margin-bottom: 1rem;
}

.access-type {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.access-btn {
    flex: 1;
    padding: 0.8rem;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s ease;
    opacity: 0.7;
}

.access-btn.active {
    opacity: 1;
    transform: scale(1.02);
}

.allow-btn {
    background: #4caf50;
    color: white;
}

.allow-btn.active {
    box-shadow: 0 3px 10px rgba(76, 175, 80, 0.4);
}

.restrict-btn {
    background: #f44336;
    color: white;
}

.restrict-btn.active {
    box-shadow: 0 3px 10px rgba(244, 67, 54, 0.4);
}

.access-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.conditions {
    margin-top: 1.5rem;
}

.condition-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.toggle {
    width: 50px;
    height: 26px;
    background: #555;
    border-radius: 13px;
    position: relative;
    cursor: pointer;
    transition: background 0.3s ease;
}

.toggle.active {
    background: #4fc3f7;
}

.toggle-slider {
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    position: absolute;
    top: 2px;
    left: 2px;
    transition: transform 0.3s ease;
}

.toggle.active .toggle-slider {
    transform: translateX(24px);
}

/* Result Display */
.result-display {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    padding: 2rem;
    text-align: center;
}

.access-indicator {
    width: 100px;
    height: 100px;
    margin: 2rem auto;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    transition: all 0.3s ease;
}

.access-granted {
    background: #4caf50;
    box-shadow: 0 0 30px rgba(76, 175, 80, 0.5);
}

.access-denied {
    background: #f44336;
    box-shadow: 0 0 30px rgba(244, 67, 54, 0.5);
}

/* Animations */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.8s ease-out forwards;
}

.stagger-1 { animation-delay: 0.1s; }
.stagger-2 { animation-delay: 0.2s; }
.stagger-3 { animation-delay: 0.3s; }