/* Desktop Styles for How to Aleo? - Futuristic Dark Mode */
:root {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #00AFFF;
    --accent-secondary: #007BFF;
    --accent-gradient: linear-gradient(135deg, #00AFFF 0%, #007BFF 100%);
    --border-color: #2a2a2a;
    --shadow-sm: 0 2px 8px rgba(0, 175, 255, 0.15);
    --shadow: 0 4px 16px rgba(0, 175, 255, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 175, 255, 0.35);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #00AFFF;
    --accent-secondary: #007BFF;
    --accent-gradient: linear-gradient(135deg, #00AFFF 0%, #007BFF 100%);
    --border-color: #2a2a2a;
    --shadow-sm: 0 2px 8px rgba(0, 175, 255, 0.15);
    --shadow: 0 4px 16px rgba(0, 175, 255, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 175, 255, 0.35);
}

[data-theme="light"] {
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-tertiary: #141414;
    --text-primary: #ffffff;
    --text-secondary: #a0a0a0;
    --accent-primary: #00AFFF;
    --accent-secondary: #007BFF;
    --accent-gradient: linear-gradient(135deg, #00AFFF 0%, #007BFF 100%);
    --border-color: #2a2a2a;
    --shadow-sm: 0 2px 8px rgba(0, 175, 255, 0.15);
    --shadow: 0 4px 16px rgba(0, 175, 255, 0.25);
    --shadow-lg: 0 8px 32px rgba(0, 175, 255, 0.35);
}

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

html {
    overflow-x: hidden;
    max-width: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 18px;
    line-height: 1.7;
    color: var(--text-primary);
    background: linear-gradient(135deg, #000000 0%, #001a33 100%);
    background-attachment: fixed;
    transition: var(--transition);
    position: relative;
    overflow-x: hidden;
    max-width: 100%;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(at 10% 20%, rgba(0, 175, 255, 0.08) 0px, transparent 40%),
        radial-gradient(at 90% 80%, rgba(0, 123, 255, 0.06) 0px, transparent 40%),
        radial-gradient(at 50% 50%, rgba(0, 175, 255, 0.04) 0px, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

[data-theme="dark"] body {
    background: linear-gradient(135deg, #000000 0%, #001a33 100%);
}

[data-theme="light"] body {
    background: linear-gradient(135deg, #000000 0%, #001a33 100%);
}

.container {
    max-width: 1400px;
    width: 90%;
    margin: 0 auto;
    padding: 200px 4% 60px 4%;
    position: relative;
    z-index: 1;
    overflow-x: hidden;
}

/* Responsive container sizing for different screen widths */
@media (min-width: 1920px) {
    .container {
        max-width: 1600px;
        width: 85%;
    }
    
    .desktop-header-content {
        padding: 0 60px;
    }
}

@media (min-width: 2560px) {
    .container {
        max-width: 1800px;
        width: 75%;
    }
    
    .desktop-header-content {
        padding: 0 80px;
    }
}

@media (min-width: 769px) and (max-width: 1200px) {
    .container {
        max-width: 95%;
        padding: 200px 3% 40px 3%;
    }
    
    .desktop-header-content {
        padding: 0 20px;
        gap: 30px;
    }
    
    .progress-stepper {
        padding: 0 5px;
    }
    
    .step-label {
        font-size: 0.7rem;
    }
    
    .step-circle {
        width: 38px;
        height: 38px;
        font-size: 0.95rem;
    }
    
    .stepper-step.active .step-circle {
        transform: scale(1.15);
    }
    
    .stepper-step:hover .step-circle {
        transform: scale(1.1);
    }
    
    .main-title-inline {
        font-size: 1.6rem;
    }
    
    .logo-inline {
        width: 36px;
    }
    
    .header-title-section {
        gap: 15px;
    }
}

@media (min-width: 769px) and (max-width: 950px) {
    .step-label {
        font-size: 0.65rem;
    }
    
    .step-circle {
        width: 35px;
        height: 35px;
        font-size: 0.9rem;
    }
}

/* Desktop Fixed Header */
.desktop-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 2px solid var(--accent-primary);
    box-shadow: 0 4px 30px rgba(0, 175, 255, 0.3);
    z-index: 1000;
    padding: 20px 0;
}

.desktop-header-content {
    display: flex;
    align-items: center;
    gap: 40px;
    padding: 0 40px;
}

.header-top {
    display: flex;
    align-items: center;
    gap: 40px;
    flex: 1;
}

.header-title-section {
    display: flex;
    align-items: center;
    gap: 20px;
    min-width: fit-content;
    flex-shrink: 0;
}

.logo-inline {
    width: 48px;
    height: auto;
    filter: drop-shadow(0 0 20px rgba(0, 175, 255, 0.5));
}

.title-wrapper {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.main-title-inline {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.author-inline {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
}

.author-inline a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.author-inline a:hover {
    color: var(--accent-primary);
    text-shadow: 0 0 10px rgba(0, 175, 255, 0.5);
}

/* Progress Stepper */
.progress-stepper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex: 1;
    padding: 0 20px;
    position: relative;
    gap: 0;
}

.stepper-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    position: relative;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1;
    flex-shrink: 0;
}

/* Submenu indicator removed - tooltip functionality disabled */

.stepper-step:hover .step-circle {
    transform: scale(1.15);
    box-shadow: 0 0 25px rgba(0, 175, 255, 0.6);
    border-color: var(--accent-primary);
}

.stepper-step:hover .step-label {
    color: var(--accent-primary);
}

.stepper-step.active {
    transform: translateY(-3px);
}

.stepper-step.active .step-circle {
    background: var(--accent-gradient);
    border-color: var(--accent-primary);
    color: #ffffff;
    box-shadow: 0 0 35px var(--accent-primary), 0 0 60px rgba(0, 175, 255, 0.4);
    transform: scale(1.3);
    animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
    0%, 100% {
        box-shadow: 0 0 35px var(--accent-primary), 0 0 60px rgba(0, 175, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 45px var(--accent-primary), 0 0 80px rgba(0, 175, 255, 0.6);
    }
}

.stepper-step.completed .step-circle {
    background: rgba(0, 175, 255, 0.3);
    border-color: var(--accent-primary);
    color: var(--accent-primary);
}

.step-circle {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    background: var(--bg-secondary);
    border: 3px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.1rem;
    color: var(--text-secondary);
    transition: var(--transition);
    z-index: 2;
    position: relative;
}

.step-label {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
    white-space: nowrap;
    transition: all 0.3s ease;
}

.stepper-step.active .step-label {
    color: var(--accent-primary);
    font-weight: 700;
    font-size: 0.95rem;
    text-shadow: 0 0 10px rgba(0, 175, 255, 0.5);
}

.stepper-step.completed .step-label {
    color: var(--accent-primary);
    opacity: 0.7;
}

.stepper-connector {
    display: flex;
    align-items: center;
    flex: 1 1 auto;
    position: relative;
    min-width: 0;
}

.stepper-line {
    width: 100%;
    height: 3px;
    background: var(--border-color);
    position: relative;
    transition: all 0.5s ease;
}

.stepper-line.completed {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    box-shadow: 0 0 10px rgba(0, 175, 255, 0.5);
}

/* Inline Submenu - DISABLED (tooltip functionality removed) */
.inline-submenu {
    display: none !important;
}

/* Old submenu container styles removed - now using inline submenu */

/* Header Styles (old - kept for mobile) */
.header {
    text-align: center;
    margin-bottom: 80px;
    position: relative;
    display: none;
}

/* Hide mobile-only elements on desktop */
.mobile-only {
    display: none !important;
}

.logo {
    width: 72px;
    height: auto;
    margin: 0 auto 1.5rem;
    animation: fadeIn 1s ease-in, glow 3s ease-in-out infinite;
    filter: drop-shadow(0 0 30px rgba(0, 175, 255, 0.5));
    position: relative;
    display: block;
}

@keyframes glow {
    0%, 100% {
        filter: drop-shadow(0 0 30px rgba(0, 175, 255, 0.5));
    }
    50% {
        filter: drop-shadow(0 0 50px rgba(0, 175, 255, 0.8));
    }
}

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

.main-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    letter-spacing: -0.02em;
}

.author {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.author a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.author a:hover {
    text-decoration: underline;
}

/* Theme Toggle */
.theme-toggle {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    width: 56px;
    height: 56px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.3);
}

.theme-toggle:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(0, 175, 255, 0.5);
    border-color: var(--accent-secondary);
    background: var(--bg-tertiary);
}

.theme-toggle:active {
    transform: scale(0.95) rotate(-15deg);
}

.theme-icon {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
    transition: var(--transition);
}

.theme-icon .sun {
    opacity: 1;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.theme-icon .moon {
    opacity: 0;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

[data-theme="dark"] .theme-icon .sun {
    opacity: 0;
    transform: rotate(180deg);
}

[data-theme="dark"] .theme-icon .moon {
    opacity: 1;
    transform: rotate(0deg);
}

[data-theme="light"] .theme-icon .moon {
    transform: rotate(-180deg);
}

/* Progress Bar */
.progress-container {
    margin: 2rem 0;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--bg-secondary);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.75rem;
    border: 1px solid var(--border-color);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    transition: width 0.3s ease;
    width: 14.28%; /* 1/7 */
}

.progress-text {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

/* Navigation */
.navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    margin-top: 2rem;
}

.nav-btn {
    padding: 14px 28px;
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    border-radius: 10px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.nav-btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.nav-btn:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.nav-btn:hover:not(:disabled)::before {
    width: 300px;
    height: 300px;
}

.nav-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    box-shadow: none;
}

.part-selector {
    display: flex;
    align-items: center;
    gap: 10px;
}

.part-selector label {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.part-selector select {
    padding: 10px 18px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 10px;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
}

.part-selector select:hover {
    border-color: var(--accent-secondary);
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.2);
}

/* Content Styles */
.content {
    margin: 20px 0 80px 0;
}

.content h1 {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    margin-top: 0;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

.content h2 {
    font-size: clamp(2rem, 3vw, 2.5rem);
    margin: 4rem 0 2rem;
    color: var(--text-primary);
    position: relative;
    padding-bottom: 1rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.content h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 80px;
    height: 5px;
    background: var(--accent-gradient);
    border-radius: 3px;
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.6);
}

.content h3 {
    font-size: 1.75rem;
    margin: 3rem 0 1.5rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 15px;
    font-weight: 600;
}

.content h3::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    flex-shrink: 0;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 20px var(--accent-primary);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.2);
    }
}

.content p {
    margin-bottom: 2rem;
    color: var(--text-primary);
    line-height: 1.8;
    font-size: 1.05rem;
}

/* Enhanced paragraph blocks with visual accents */
.content > p {
    padding: 1.5rem 2rem;
    border-left: 4px solid transparent;
    border-radius: 10px;
    background: linear-gradient(to right, rgba(0, 175, 255, 0.05) 0%, transparent 100%);
    transition: var(--transition);
}

.content > p:hover {
    border-left-color: var(--accent-primary);
    background: linear-gradient(to right, rgba(0, 175, 255, 0.1) 0%, rgba(0, 175, 255, 0.05) 50%, transparent 100%);
    transform: translateX(8px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.1);
}

/* Emphasis on paragraphs with strong elements */
.content p:has(strong) {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 12px;
    border-left: 5px solid var(--accent-primary);
    box-shadow: var(--shadow-sm);
    border: 2px solid var(--border-color);
    border-left: 5px solid var(--accent-primary);
}

.content p:has(em) {
    font-style: normal;
    padding: 1.5rem 2rem;
    background: linear-gradient(135deg, rgba(0, 123, 255, 0.1) 0%, rgba(0, 175, 255, 0.05) 100%);
    border-radius: 10px;
    border-left: 4px solid var(--accent-secondary);
    border: 2px solid rgba(0, 123, 255, 0.3);
    border-left: 4px solid var(--accent-secondary);
}

.content ul, .content ol {
    margin: 2rem 0;
    padding: 2rem 2.5rem 2rem 3.5rem;
    color: var(--text-primary);
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.content li {
    margin-bottom: 1.25rem;
    padding-left: 0.75rem;
    position: relative;
    line-height: 1.8;
    font-size: 1.05rem;
}

.content li::marker {
    color: var(--accent-primary);
    font-weight: 600;
}

.content li strong {
    color: var(--accent-primary);
    font-weight: 600;
}

.content a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.content a:hover {
    text-decoration: underline;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    margin-bottom: 3rem;
    text-align: left;
}

/* Card Grid */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin: 4rem 0;
}

/* Optimize card grid for wider screens */
@media (min-width: 1400px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 35px;
    }
}

@media (min-width: 1920px) {
    .card-grid {
        gap: 40px;
    }
}

.card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 40px;
    transition: var(--transition);
    position: relative;
    overflow: visible;
    box-shadow: var(--shadow-sm);
}

.card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0, 175, 255, 0.1) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

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

.card:hover::after {
    opacity: 1;
}

.card h3 {
    font-size: 1.5rem;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
    position: relative;
    padding-left: 25px;
    font-weight: 600;
}

.card h3::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 10px var(--accent-primary);
}

.card:nth-child(1) h3::before {
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.card:nth-child(2) h3::before {
    background: var(--accent-secondary);
    box-shadow: 0 0 10px var(--accent-secondary);
}

.card:nth-child(3) h3::before {
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* Divider */
.divider {
    border: none;
    height: 2px;
    background: linear-gradient(to right, transparent, var(--accent-primary) 20%, var(--accent-secondary) 80%, transparent);
    margin: 4rem 0;
    position: relative;
    opacity: 0.3;
}

.divider::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 25px var(--accent-primary);
    animation: pulse 2s ease-in-out infinite;
}

/* Demo Styles */
.demo-container {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    padding: 50px;
    margin: 4rem 0;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.demo-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--accent-gradient);
    opacity: 1;
    box-shadow: 0 2px 20px rgba(0, 175, 255, 0.5);
}

.demo-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.demo-view {
    background: var(--bg-tertiary);
    border: 2px solid var(--accent-primary);
    border-radius: 10px;
    padding: 25px;
    margin-bottom: 2rem;
}

.demo-view h4 {
    margin-bottom: 1.25rem;
    color: var(--accent-primary);
    font-size: 1.15rem;
    font-weight: 600;
}

.demo-view p {
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
}

.masked-text {
    color: var(--text-secondary);
    letter-spacing: 2px;
}

.reveal-text {
    animation: reveal 0.5s ease-in;
}

@keyframes reveal {
    from {
        opacity: 0;
        filter: blur(10px);
    }
    to {
        opacity: 1;
        filter: blur(0);
    }
}

/* Quiz Styles */
.quiz-container {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    padding: 50px;
    margin: 4rem 0;
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.quiz-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--accent-gradient);
    opacity: 1;
    box-shadow: 0 2px 20px rgba(0, 175, 255, 0.5);
}

.quiz-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.quiz-question {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
    line-height: 1.6;
}

.quiz-options {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 2rem;
}

.quiz-option {
    display: flex;
    align-items: center;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 18px;
    cursor: pointer;
    transition: var(--transition);
}

.quiz-option:hover {
    border-color: var(--accent-primary);
    transform: translateX(8px) scale(1.02);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
    background: var(--bg-secondary);
}

.quiz-option input[type="radio"] {
    margin-right: 15px;
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.quiz-option label {
    cursor: pointer;
    flex: 1;
}

.quiz-result {
    text-align: center;
    padding: 40px;
    animation: fadeIn 0.5s ease-in;
}

.quiz-result h3 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.quiz-score {
    font-size: 4rem;
    color: var(--accent-primary);
    font-weight: 700;
    margin: 2.5rem 0;
    text-shadow: 0 0 30px rgba(0, 175, 255, 0.5);
}

/* Buttons */
.btn-primary {
    padding: 14px 36px;
    background: var(--accent-gradient);
    color: #ffffff;
    border: none;
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.3);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.3s ease, height 0.3s ease;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-secondary {
    padding: 14px 36px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    font-size: 1.05rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--accent-secondary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.3);
    background: var(--bg-tertiary);
}

/* Footer */
.footer {
    margin-top: 80px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 2rem;
}

.footer-links {
    display: flex;
    gap: 30px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    font-size: 1rem;
}

.footer-links a:hover {
    color: var(--accent-primary);
    text-shadow: 0 0 10px rgba(0, 175, 255, 0.5);
}

/* Use Case Grid */
.use-case-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 35px;
    margin: 4rem 0;
}

/* Optimize for wider screens */
@media (min-width: 1600px) {
    .use-case-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 30px;
    }
}

.use-case-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 35px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.use-case-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-gradient);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.use-case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-primary);
    background: var(--bg-tertiary);
}

.use-case-card:hover::before {
    transform: scaleY(1);
}

.use-case-card h4 {
    font-size: 1.35rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
    font-weight: 600;
    position: relative;
    padding-left: 20px;
}

.use-case-card h4::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 5px;
    height: 5px;
    background: var(--accent-primary);
    border-radius: 50%;
    box-shadow: 0 0 8px var(--accent-primary);
}

.use-case-card p {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.7;
}

/* External Links */
.external-links {
    display: flex;
    gap: 15px;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.external-link {
    display: inline-flex;
    align-items: center;
    padding: 12px 24px;
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 10px;
    color: var(--text-primary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    font-size: 1rem;
}

.external-link::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 3px;
    background: var(--accent-gradient);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.external-link:hover {
    border-color: var(--accent-secondary);
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 0 25px rgba(0, 175, 255, 0.4);
    background: var(--bg-tertiary);
}

.external-link:hover::before {
    transform: scaleY(1);
}

/* Animations */
.fade-in {
    animation: fadeIn 0.5s ease-in;
}

.slide-in {
    animation: slideIn 0.5s ease-out;
}

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

/* Scroll reveal animation */
.content > * {
    animation: fadeInUp 0.6s ease-out backwards;
}

.content > *:nth-child(1) { animation-delay: 0.1s; }
.content > *:nth-child(2) { animation-delay: 0.15s; }
.content > *:nth-child(3) { animation-delay: 0.2s; }
.content > *:nth-child(4) { animation-delay: 0.25s; }
.content > *:nth-child(5) { animation-delay: 0.3s; }

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

/* Subtle background pattern */
.content {
    position: relative;
    overflow: hidden;
}

.content::before {
    content: '';
    position: absolute;
    top: 0;
    left: -50px;
    width: 200%;
    height: 100%;
    background-image: 
        repeating-linear-gradient(
            45deg,
            transparent,
            transparent 50px,
            var(--border-color) 50px,
            var(--border-color) 51px
        );
    opacity: 0.03;
    pointer-events: none;
    z-index: -1;
}

/* Stat Highlight */
.stat-highlight {
    text-align: center;
    padding: 3rem;
    margin: 3rem 0;
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.1) 0%, rgba(0, 123, 255, 0.05) 100%);
    border-radius: 16px;
    border: 2px solid var(--accent-primary);
    box-shadow: 0 0 40px rgba(0, 175, 255, 0.2);
}

.stat-number {
    font-size: 5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 1rem;
}

.stat-text {
    font-size: 1.25rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Comparison Grid */
.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin: 3rem 0;
}

.comparison-card {
    padding: 2.5rem;
    border-radius: 12px;
    border: 2px solid var(--border-color);
    background: var(--bg-secondary);
    transition: var(--transition);
}

.comparison-card.problem {
    border-left: 4px solid #ff4444;
}

.comparison-card.solution {
    border-left: 4px solid var(--accent-primary);
}

.comparison-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.comparison-card h4 {
    font-size: 1.4rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.simple-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.simple-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    color: var(--text-primary);
    font-size: 1rem;
}

.simple-list li::before {
    content: '•';
    position: absolute;
    left: 0.5rem;
    color: var(--accent-primary);
    font-size: 1.5rem;
    line-height: 1.5;
}

/* Accordion */
.accordion-container {
    margin: 3rem 0;
}

.accordion-item {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    margin-bottom: 1.5rem;
    overflow: hidden;
    transition: var(--transition);
}

.accordion-item:hover {
    border-color: var(--accent-primary);
}

.accordion-item.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 25px rgba(0, 175, 255, 0.2);
}

.accordion-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.75rem 2rem;
    cursor: pointer;
    user-select: none;
    transition: var(--transition);
}

.accordion-header:hover {
    background: var(--bg-tertiary);
}

.accordion-title {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--text-primary);
}

.accordion-icon {
    font-size: 2rem;
    color: var(--accent-primary);
    font-weight: 300;
    transition: transform 0.3s ease;
}

.accordion-item.active .accordion-icon {
    transform: rotate(45deg);
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.accordion-item.active .accordion-content {
    max-height: 3000px;
    padding: 0 2rem 2rem 2rem;
}

.accordion-content p {
    margin-bottom: 1.5rem;
    padding: 0;
    background: none;
    border: none;
}

/* Info Grid */
.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.info-box {
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.info-box:hover {
    border-color: var(--accent-primary);
    transform: translateX(5px);
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.15);
}

.info-box h5 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--accent-primary);
    font-weight: 600;
}

.info-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Impact Note */
.impact-note {
    margin-top: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.1) 0%, transparent 100%);
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
}

.impact-note strong {
    color: var(--accent-primary);
    font-size: 1.1rem;
}

.impact-note p {
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Regulation Grid */
.regulation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.regulation-box {
    padding: 1.75rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    position: relative;
}

.regulation-box:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
}

.regulation-badge {
    display: inline-block;
    padding: 0.4rem 0.9rem;
    background: var(--accent-gradient);
    color: #ffffff;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.regulation-box h5 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    font-weight: 600;
}

.regulation-box p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Conclusion Box */
.conclusion-box {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    padding: 2.5rem;
    margin: 3rem 0;
}

.conclusion-box h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.conclusion-box p {
    margin-bottom: 1.5rem;
    padding: 0;
    background: none;
    border: none;
}

.barrier-list {
    display: grid;
    gap: 1rem;
}

.barrier-item {
    padding: 1rem 1.5rem;
    background: var(--bg-tertiary);
    border-left: 3px solid var(--accent-secondary);
    border-radius: 6px;
    color: var(--text-primary);
    transition: var(--transition);
}

.barrier-item:hover {
    transform: translateX(10px);
    border-left-color: var(--accent-primary);
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.15);
}

/* Solution Callout */
.solution-callout {
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.15) 0%, rgba(0, 123, 255, 0.1) 100%);
    border: 2px solid var(--accent-primary);
    border-radius: 12px;
    padding: 2.5rem;
    margin: 3rem 0;
    text-align: center;
    box-shadow: 0 0 40px rgba(0, 175, 255, 0.25);
}

.solution-callout h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    color: var(--accent-primary);
}

.solution-callout h3::before {
    display: none;
}

.solution-callout p {
    font-size: 1.15rem;
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Solution Intro */
.solution-intro {
    text-align: center;
    margin-bottom: 4rem;
    padding: 2rem;
}

.solution-intro h2 {
    margin-bottom: 1.5rem;
}

.solution-intro h2::after {
    left: 50%;
    transform: translateX(-50%);
}

.solution-intro p {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    background: none;
    border: none;
}

/* Features Grid - Interactive Cards */
.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin: 3rem 0;
}

.feature-card {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

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

.feature-card.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(0, 175, 255, 0.3);
}

.feature-card.active::before {
    transform: scaleX(1);
}

.feature-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.feature-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.feature-header h3 {
    margin: 0;
    font-size: 1.4rem;
    flex: 1;
}

.feature-header h3::before {
    display: none;
}

.feature-expand-icon {
    color: var(--accent-primary);
    font-size: 1.2rem;
    transition: transform 0.3s ease;
    margin-left: auto;
    flex-shrink: 0;
}

.feature-card.active .feature-expand-icon {
    transform: rotate(180deg);
}

.feature-summary {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 1rem;
}

.feature-detail {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin-top 0.4s ease;
}

.feature-card.active .feature-detail {
    max-height: 1500px;
    margin-top: 1.5rem;
}

.detail-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.detail-item {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-secondary);
}

.detail-item strong {
    display: block;
    color: var(--accent-primary);
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.detail-item p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

.feature-example {
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.1) 0%, transparent 100%);
    border-radius: 8px;
    border-left: 3px solid var(--accent-primary);
}

.feature-example strong {
    color: var(--accent-primary);
}

/* Tech Stack Visual */
.tech-stack-visual {
    margin: 4rem 0;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 2px solid var(--border-color);
}

.tech-stack-visual h2 {
    text-align: center;
    margin-bottom: 3rem;
}

.stack-layers {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stack-layer {
    display: flex;
    align-items: center;
    gap: 2rem;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.stack-layer:hover {
    border-color: var(--accent-primary);
    transform: translateX(10px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
}

.layer-label {
    min-width: 100px;
    padding: 0.5rem 1rem;
    background: var(--accent-gradient);
    color: #ffffff;
    border-radius: 6px;
    text-align: center;
    font-weight: 600;
    font-size: 0.9rem;
}

.layer-content h4 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.layer-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Tech Tabs */
.tech-intro {
    text-align: center;
    margin-bottom: 3rem;
}

.tech-intro h2 {
    margin-bottom: 1rem;
}

.tech-intro h2::after {
    left: 50%;
    transform: translateX(-50%);
}

.tech-intro p {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    background: none;
    border: none;
}

.tech-tabs {
    margin: 3rem 0;
}

.tab-navigation {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 2px solid var(--border-color);
    flex-wrap: wrap;
}

.tab-btn {
    padding: 1rem 2rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    bottom: -2px;
}

.tab-btn:hover {
    color: var(--accent-primary);
    background: rgba(0, 175, 255, 0.05);
}

.tab-btn.active {
    color: var(--accent-primary);
    border-bottom-color: var(--accent-primary);
}

.tab-content {
    display: none;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 2px solid var(--border-color);
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

.tab-content h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.tech-description {
    font-size: 1.05rem;
    color: var(--text-primary);
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(to right, rgba(0, 175, 255, 0.1) 0%, transparent 100%);
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
}

/* Process Steps */
.how-it-works {
    margin: 2rem 0;
}

.how-it-works h4 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.process-steps {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.process-step {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    transition: var(--transition);
}

.process-step:hover {
    transform: translateX(10px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.15);
}

.step-number {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.step-content h5 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-primary);
}

.step-content p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Example Box */
.example-box {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
    border: 2px solid var(--accent-secondary);
}

.example-box h4 {
    font-size: 1.2rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.example-box p {
    margin-bottom: 1.5rem;
    padding: 0;
    background: none;
    border: none;
}

.example-flow {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.flow-item {
    flex: 1;
    min-width: 150px;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: 8px;
    text-align: center;
    font-size: 0.9rem;
    border: 1px solid var(--border-color);
}

.flow-item code {
    display: block;
    margin-top: 0.5rem;
    color: var(--accent-primary);
    font-family: 'Courier New', monospace;
}

.flow-arrow {
    color: var(--accent-primary);
    font-size: 1.5rem;
    font-weight: 700;
}

/* Characteristics Grid */
.characteristics-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 2rem 0;
}

.char-card {
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.char-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
}

.char-icon {
    width: 40px;
    height: 40px;
    border-radius: 8px;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.char-card h5 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.char-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Lifecycle Visual */
.lifecycle-visual {
    margin: 2rem 0;
    padding: 2rem;
    background: var(--bg-tertiary);
    border-radius: 12px;
}

.lifecycle-visual h4 {
    text-align: center;
    margin-bottom: 2rem;
    color: var(--text-primary);
}

.lifecycle-stages {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.stage {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    min-width: 120px;
}

.stage-icon {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.stage h5 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--accent-primary);
}

.stage p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

.stage-arrow {
    color: var(--accent-primary);
    font-size: 2rem;
    font-weight: 700;
}

/* Why It Matters */
.why-it-matters {
    margin: 2rem 0;
    padding: 1.5rem;
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.1) 0%, transparent 100%);
    border-left: 4px solid var(--accent-primary);
    border-radius: 8px;
}

.why-it-matters strong {
    display: block;
    color: var(--accent-primary);
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.why-it-matters p {
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Features List */
.features-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.feature-row {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-secondary);
    transition: var(--transition);
}

.feature-row:hover {
    border-left-color: var(--accent-primary);
    transform: translateX(10px);
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.15);
}

.feature-label {
    min-width: 150px;
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 1rem;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Developer Benefit */
.developer-benefit {
    margin: 2rem 0;
    padding: 2rem;
    background: linear-gradient(135deg, rgba(0, 175, 255, 0.1) 0%, rgba(0, 123, 255, 0.05) 100%);
    border-radius: 12px;
    border: 2px solid var(--accent-primary);
}

.developer-benefit h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: var(--accent-primary);
}

.developer-benefit p {
    margin: 0;
    padding: 0;
    background: none;
    border: none;
    font-size: 1.05rem;
}

/* Consensus Features */
.consensus-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.consensus-card {
    padding: 1.5rem;
    background: var(--bg-tertiary);
    border-radius: 10px;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.consensus-card:hover {
    border-color: var(--accent-primary);
    transform: translateY(-5px);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
}

.consensus-card h4 {
    font-size: 1.15rem;
    margin-bottom: 0.75rem;
    color: var(--accent-primary);
}

.consensus-card p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin: 0;
    padding: 0;
    background: none;
    border: none;
}

/* Future Section Styles */
.future-intro {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem;
}

.future-intro h2 {
    margin-bottom: 1.5rem;
}

.future-intro h2::after {
    left: 50%;
    transform: translateX(-50%);
}

.future-intro p {
    font-size: 1.15rem;
    max-width: 800px;
    margin: 0 auto;
    padding: 0;
    background: none;
    border: none;
}

/* Interactive Use Case Cards */
.use-case-card-interactive {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    cursor: pointer;
    transition: var(--transition);
    overflow: hidden;
}

.use-case-card-interactive:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.2);
}

.use-case-card-interactive.active {
    border-color: var(--accent-primary);
    box-shadow: 0 0 30px rgba(0, 175, 255, 0.3);
}

.use-case-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 0.75rem;
}

.use-case-icon {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 300;
    flex-shrink: 0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.4);
    cursor: pointer;
}

.use-case-card-interactive:hover .use-case-icon {
    box-shadow: 0 0 25px rgba(0, 175, 255, 0.6);
}

.use-case-card-interactive.active .use-case-icon {
    transform: rotate(45deg);
    box-shadow: 0 0 20px rgba(0, 175, 255, 0.5);
}

.use-case-header h4 {
    margin: 0;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.use-case-preview {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.use-case-details {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, margin-top 0.4s ease;
}

.use-case-card-interactive.active .use-case-details {
    max-height: 800px;
    margin-top: 1rem;
}

.problem-section,
.solution-section,
.impact-section {
    padding: 1rem 1.25rem;
    margin-bottom: 0.75rem;
    border-radius: 8px;
}

.problem-section {
    background: rgba(255, 68, 68, 0.1);
    border-left: 3px solid #ff4444;
}

.solution-section {
    background: rgba(0, 175, 255, 0.1);
    border-left: 3px solid var(--accent-primary);
}

.impact-section {
    background: rgba(0, 255, 136, 0.1);
    border-left: 3px solid #00ff88;
}

.problem-section strong,
.solution-section strong,
.impact-section strong {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.problem-section strong {
    color: #ff4444;
}

.solution-section strong {
    color: var(--accent-primary);
}

.impact-section strong {
    color: #00ff88;
}

/* Application Categories */
.application-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
    margin: 3rem 0;
}

.app-category {
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: var(--transition);
}

.app-category:hover {
    border-color: var(--accent-primary);
    box-shadow: 0 0 25px rgba(0, 175, 255, 0.2);
    transform: translateY(-5px);
}

.app-category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.app-icon {
    width: 50px;
    height: 50px;
    border-radius: 10px;
    background: var(--accent-gradient);
    color: #ffffff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    flex-shrink: 0;
}

.app-category-header h3 {
    margin: 0;
    font-size: 1.4rem;
}

.app-category-header h3::before {
    display: none;
}

.app-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.app-item {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border-left: 3px solid var(--accent-secondary);
    transition: var(--transition);
}

.app-item:hover {
    border-left-color: var(--accent-primary);
    transform: translateX(10px);
    box-shadow: 0 0 15px rgba(0, 175, 255, 0.15);
}

.app-label {
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 1rem;
}

.app-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}