@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
    --primary-bg: #0a0f2c;
    --secondary-bg: #101842;
    --card-bg: #1a2357;
    --text-primary: #ffffff;
    --text-secondary: #c0c8ff;
    --accent-primary: #00e0b0;
    --accent-secondary: #4d8aff;
    --accent-success: #00e0b0;
    --accent-error: #ff4d6d;
    --border-color: #35418b;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--primary-bg);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background-image: radial-gradient(rgba(77, 138, 255, 0.2) 1.5px, transparent 1.5px);
    background-size: 30px 30px;
    animation: pulse 10s infinite linear;
}

@keyframes pulse {
    0% { background-size: 30px 30px; opacity: 0.5; }
    50% { background-size: 35px 35px; opacity: 1; }
    100% { background-size: 30px 30px; opacity: 0.5; }
}

.container { max-width: 1024px; margin: 0 auto; padding: 60px 20px; }
header { display: flex; justify-content: flex-start; align-items: center; padding: 20px 40px; position: fixed; width: 100%; top: 0; left: 0; z-index: 1000; background: rgba(10, 15, 44, 0.8); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border-color); }
.logo { font-size: 1.5rem; font-weight: 700; }
.logo span { color: var(--accent-primary); }
.page { min-height: 100vh; display: flex; flex-direction: column; justify-content: center; padding-top: 80px; position: relative; }
.main-title { font-size: 4.5rem; font-weight: 700; margin-bottom: 20px; line-height: 1.1; text-align: center; background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.subtitle { font-size: 1.25rem; color: var(--text-secondary); max-width: 650px; margin: 0 auto 40px; text-align: center; }
.btn { display: inline-block; padding: 14px 32px; font-size: 1rem; font-weight: 600; text-decoration: none; border-radius: 8px; cursor: pointer; transition: transform 0.2s, box-shadow 0.3s; border: none; }
.btn-primary { background-color: var(--accent-primary); color: var(--primary-bg); }
.btn:hover { transform: translateY(-3px); box-shadow: 0 10px 20px rgba(0, 224, 176, 0.2); }
.section-header { text-align: center; margin-bottom: 60px; }
.section-title { font-size: 2.8rem; margin-bottom: 15px; color: var(--text-primary); }
.section-subtitle { font-size: 1.1rem; color: var(--text-secondary); max-width: 700px; margin: 0 auto; }
.learning-journey { position: fixed; top: 50%; left: 30px; transform: translateY(-50%); display: flex; flex-direction: column; gap: 20px; z-index: 999; }
.journey-item { position: relative; cursor: pointer; }
.journey-item .icon-bg { width: 40px; height: 40px; border-radius: 50%; border: 2px solid var(--border-color); background-color: var(--secondary-bg); transition: all 0.4s ease; }
.journey-item svg { position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 20px; height: 20px; color: var(--text-secondary); transition: all 0.4s ease; }
.journey-item .journey-tooltip { position: absolute; left: 55px; top: 50%; transform: translateY(-50%); background-color: var(--card-bg); color: var(--text-primary); padding: 5px 12px; border-radius: 6px; white-space: nowrap; opacity: 0; visibility: hidden; transition: opacity 0.3s, visibility 0.3s; font-size: 0.9rem; }
.journey-item:hover .journey-tooltip { opacity: 1; visibility: visible; }
.journey-item.active .icon-bg { border-color: var(--accent-primary); background-color: var(--accent-primary); }
.journey-item.active svg { color: var(--primary-bg); transform: translate(-50%, -50%) scale(1.1); }
.animate-on-scroll { opacity: 0; transition: opacity 0.8s ease-out, transform 0.8s ease-out; }
.fade-up { transform: translateY(40px); }
.slide-in-left { transform: translateX(-40px); }
.slide-in-right { transform: translateX(40px); }
.animate-on-scroll.visible { opacity: 1; transform: none; }
.scroll-down-arrow { position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%); cursor: pointer; color: var(--accent-primary); animation: bounce 2.2s infinite ease-in-out; opacity: 0; transition: opacity 0.5s ease-in-out; }
.scroll-down-arrow.visible { opacity: 1; }
.scroll-down-arrow svg { width: 32px; height: 32px; transition: transform 0.3s ease-in-out; }
.scroll-down-arrow:hover svg { transform: scale(1.1); animation-play-state: paused; }
@keyframes bounce { 0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); } 40% { transform: translateX(-50%) translateY(-20px); } 60% { transform: translateX(-50%) translateY(-10px); } }
.highlights-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.highlight-card { background-color: var(--card-bg); border: 1px solid var(--border-color); padding: 30px; border-radius: 12px; text-align: center; }
.highlight-value { font-size: 2.5rem; font-weight: 700; color: var(--accent-primary); margin-bottom: 10px; display: flex; align-items: center; justify-content: center; gap: 8px; }
.highlight-label { font-size: 1rem; color: var(--text-secondary); }
.info-tooltip-container { position: relative; }
.info-icon { width: 18px; height: 18px; color: var(--text-secondary); cursor: pointer; border: 1.5px solid var(--text-secondary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 0.8rem; font-weight: bold; }
.info-tooltip { position: absolute; bottom: 120%; left: 50%; transform: translateX(-50%); width: 250px; background: var(--card-bg); color: var(--text-secondary); padding: 10px; border-radius: 6px; border: 1px solid var(--border-color); font-size: 0.85rem; text-align: left; opacity: 0; visibility: hidden; transition: all 0.3s; z-index: 10; }
.info-tooltip-container:hover .info-tooltip { opacity: 1; visibility: visible; }
.problem-tabs { display: flex; justify-content: center; gap: 20px; margin-bottom: 40px; }
.tab-btn { background: none; border: 1px solid var(--border-color); color: var(--text-secondary); padding: 12px 24px; border-radius: 8px; cursor: pointer; font-size: 1rem; font-weight: 500; transition: all 0.3s; }
.tab-btn.active, .tab-btn:hover { color: var(--text-primary); background-color: var(--secondary-bg); border-color: var(--accent-secondary); }
.problem-content { display: none; }
.problem-content.active { display: block; }
.comparison-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 30px; align-items: start; }
.comparison-col h3 { font-size: 1.5rem; margin-bottom: 20px; color: var(--accent-error); }
.comparison-col:last-child h3 { color: var(--accent-success); }
.problem-item { background: var(--card-bg); padding: 20px; border-radius: 8px; margin-bottom: 20px; border-left: 4px solid var(--accent-error); }
.solution-item { background: var(--card-bg); padding: 20px; border-radius: 8px; margin-bottom: 20px; border-left: 4px solid var(--accent-success); }
.problem-item h4, .solution-item h4 { margin-bottom: 8px; }
.problem-item p, .solution-item p { color: var(--text-secondary); font-size: 0.9rem; }
.demo-box.private { border-color: var(--accent-error); }
.demo-box.public { border-color: var(--accent-success); }
.demo-box.private h4 { color: var(--accent-error); }
.demo-box.public h4 { color: var(--accent-success); }
.auditor { border-color: var(--accent-secondary); }
.auditor h4 { color: var(--accent-secondary); }
.quiz-option.correct { border-color: var(--accent-success); background-color: rgba(0, 224, 176, 0.2); }
.quiz-option.incorrect { border-color: var(--accent-error); background-color: rgba(255, 77, 109, 0.2); }
.quiz-feedback.correct { background: rgba(0, 224, 176, 0.1); color: var(--accent-success); }
.quiz-feedback.incorrect { background: rgba(255, 77, 109, 0.1); color: var(--accent-error); }
.accordion { display: flex; flex-direction: column; gap: 20px; }
.accordion-item { background: var(--card-bg); border-radius: 12px; border: 1px solid var(--border-color); overflow: hidden; }
.accordion-header { padding: 25px; cursor: pointer; display: flex; justify-content: space-between; align-items: center; }
.accordion-header h3 { font-size: 1.4rem; color: var(--text-primary); }
.accordion-icon { transition: transform 0.4s; font-size: 2rem; color: var(--accent-secondary); }
.accordion-item.active .accordion-icon { transform: rotate(45deg); }
.accordion-content { max-height: 0; overflow: hidden; transition: max-height 0.5s ease-in-out; }
.accordion-content-inner { padding: 0 25px 25px; border-top: 1px solid var(--border-color); color: var(--text-secondary); }
.accordion-content-inner ul { list-style-position: inside; padding-left: 10px; }
.accordion-content-inner li { margin-bottom: 10px; }
.flip-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; perspective: 1000px; }
.flip-card { background-color: transparent; height: 300px; }
.flip-card-inner { position: relative; width: 100%; height: 100%; transition: transform 0.8s; transform-style: preserve-3d; }
.flip-card:hover .flip-card-inner { transform: rotateY(180deg); }
.flip-card-front, .flip-card-back { position: absolute; width: 100%; height: 100%; -webkit-backface-visibility: hidden; backface-visibility: hidden; display: flex; flex-direction: column; justify-content: center; align-items: center; background-color: var(--card-bg); border: 1px solid var(--border-color); border-radius: 12px; padding: 20px; text-align: center; }
.flip-card-back { transform: rotateY(180deg); }
.flip-card-front h3 { font-size: 1.5rem; color: var(--accent-primary); margin-top: 15px; }
.flip-card-back p { font-size: 0.9rem; color: var(--text-secondary); }
.demo-wrapper { display: flex; flex-direction: column; gap: 30px; }
.demo-container { width: 100%; background: var(--secondary-bg); padding: 30px; border-radius: 16px; border: 1px solid var(--border-color); display: flex; flex-direction: column; }
.demo-top-bar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 25px; flex-wrap: wrap; gap: 15px; }
.demo-timeline-controls { display: flex; gap: 10px; }
.demo-control-btn { background: var(--card-bg); color: var(--text-secondary); border: 1px solid var(--border-color); padding: 8px 16px; border-radius: 6px; cursor: pointer; display: flex; align-items: center; gap: 8px; font-weight: 500; }
.demo-control-btn:hover { background-color: var(--secondary-bg); border-color: var(--accent-secondary); }
.toggle-switch { position: relative; display: inline-block; width: 50px; height: 26px; }
.toggle-switch input { opacity: 0; width: 0; height: 0; }
.slider { position: absolute; cursor: pointer; top: 0; left: 0; right: 0; bottom: 0; background-color: #35418b; transition: .4s; border-radius: 34px; }
.slider:before { position: absolute; content: ""; height: 18px; width: 18px; left: 4px; bottom: 4px; background-color: white; transition: .4s; border-radius: 50%; }
input:checked + .slider { background-color: var(--accent-primary); }
input:checked + .slider:before { transform: translateX(24px); }
.toggle-label { display: flex; align-items: center; gap: 10px; font-weight: 500; color: var(--text-secondary); }
.demo-timeline { display: flex; justify-content: space-between; position: relative; margin-bottom: 25px; }
.timeline-bar { position: absolute; height: 3px; background: var(--border-color); top: 50%; transform: translateY(-50%); width: 100%; }
.timeline-progress { position: absolute; height: 3px; background: var(--accent-primary); top: 50%; transform: translateY(-50%); width: 0%; transition: width 0.5s ease-in-out; }
.timeline-step { z-index: 1; text-align: center; cursor: pointer; flex-basis: 0; flex-grow: 1; }
.timeline-dot { width: 20px; height: 20px; background: var(--card-bg); border: 3px solid var(--border-color); border-radius: 50%; margin: 0 auto 8px; transition: all 0.4s; }
.timeline-step.active .timeline-dot { background: var(--accent-primary); border-color: var(--accent-primary); transform: scale(1.2); }
.timeline-label { font-size: 0.8rem; color: var(--text-secondary); }
.timeline-step.active .timeline-label { color: var(--text-primary); font-weight: 600; }
.demo-content { width: 100%; position: relative; min-height: 250px; }
.demo-step { position: absolute; width: 100%; opacity: 0; visibility: hidden; transition: opacity 0.5s, transform 0.5s; transform: translateY(10px); }
.demo-step.active { opacity: 1; visibility: visible; transform: translateY(0); }
.demo-box-container { display: flex; justify-content: space-around; align-items: flex-start; gap: 20px; margin-top: 20px; }
.demo-box { background-color: var(--card-bg); border: 1px solid var(--border-color); padding: 20px; border-radius: 10px; width: 48%; }
.demo-box h4 { font-size: 1rem; margin-bottom: 10px; color: var(--text-primary); padding-bottom: 10px; border-bottom: 1px solid var(--border-color); }
.demo-box-content { font-family: 'SF Mono', 'Courier New', monospace; font-size: 0.9rem; color: var(--text-secondary); white-space: pre-wrap; line-height: 1.8; }
.demo-step > p { font-size: 1rem; color: var(--text-secondary); margin-bottom: 20px; text-align: center; }
.blur { background: var(--border-color); color: transparent; border-radius: 4px; padding: 0 4px; user-select: none; display: inline-block; transition: all 0.3s; }
.quiz-container { width: 100%; max-width: 700px; background: var(--secondary-bg); padding: 40px; border-radius: 16px; border: 1px solid var(--border-color); text-align: left; }
.quiz-question { font-size: 1.25rem; font-weight: 600; margin-bottom: 25px; }
.quiz-options { display: flex; flex-direction: column; gap: 15px; }
.quiz-option { background-color: var(--card-bg); border: 1px solid var(--border-color); padding: 15px; border-radius: 8px; cursor: pointer; transition: all 0.3s; }
.quiz-option:hover { border-color: var(--accent-secondary); background-color: rgba(77, 138, 255, 0.1); }
.quiz-feedback { margin-top: 20px; padding: 15px; border-radius: 8px; font-size: 0.9rem; display: none; }
.quiz-controls { margin-top: 30px; text-align: right; }
.quiz-result { text-align: center; }
.trophy { font-size: 5rem; margin-bottom: 20px; }
.share-container { margin-top: 40px; border-top: 1px solid var(--border-color); padding-top: 30px; text-align: center; }
.share-container h3 { font-size: 1.2rem; margin-bottom: 20px; color: var(--text-secondary); }
.share-preview { margin-bottom: 20px; }
.share-preview img { max-width: 100%; border-radius: 8px; border: 1px solid var(--border-color); }
.share-buttons { display: flex; justify-content: center; gap: 15px; }
.btn-twitter { background-color: #1DA1F2; color: white; }
.btn-download { background-color: var(--secondary-bg); color: var(--text-primary); border: 1px solid var(--border-color); }
#quiz-result-card { position: absolute; left: -9999px; top: auto; width: 600px; padding: 40px; background: linear-gradient(135deg, var(--primary-bg), var(--secondary-bg)); color: var(--text-primary); font-family: 'Inter', sans-serif; border-radius: 16px; border: 1px solid var(--border-color); }
.roadmap-container { max-width: 700px; margin: 0 auto; background: var(--secondary-bg); padding: 40px 50px; border-radius: 16px; border: 1px solid var(--border-color); }
.roadmap-header { font-size: 1.5rem; font-weight: 600; color: var(--text-secondary); text-transform: uppercase; letter-spacing: 2px; margin-bottom: 40px; padding-bottom: 20px; border-bottom: 1px solid var(--border-color); }
.roadmap-item { display: grid; grid-template-columns: 40px 1.5fr 2fr; gap: 20px; align-items: center; font-size: 1.25rem; margin-bottom: 25px; }
.roadmap-item:last-child { margin-bottom: 0; }
.status-indicator { width: 4px; height: 25px; justify-self: center; background-color: var(--border-color); border-radius: 2px; }
.status-indicator.blinking { background-color: var(--accent-error); animation: blink 1.5s infinite; }
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0.3; } }
.date { color: var(--text-secondary); font-weight: 500; }
.milestone { color: var(--text-primary); font-weight: 600; text-align: right; }