:root {
    --bg-color: #0a0a0c;
    --text-primary: #ffffff;
    --text-secondary: #8892b0;
    --accent: #64ffda;
    --accent-glow: rgba(100, 255, 218, 0.2);
    --card-bg: rgba(255, 255, 255, 0.03);
    --border: rgba(255, 255, 255, 0.1);
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    line-height: 1.6;
    overflow-x: hidden;
}

/* HUD Grid Background */
.grid-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background-image:
        linear-gradient(var(--border) 1px, transparent 1px),
        linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.05;
    z-index: -1;
    pointer-events: none;
}

.glow-bg {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(100, 255, 218, 0.15) 0%, rgba(0, 0, 0, 0) 70%);
    transform: translate(-50%, -50%);
    z-index: -1;
    transition: transform 0.1s ease-out;
}

/* Typography & Layout */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10, 10, 12, 0.8);
}

.logo {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -1px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(0, 255, 242, 0.3);
}

.version {
    font-size: 0.7rem;
    background: var(--card-bg);
    padding: 2px 6px;
    border-radius: 4px;
    color: var(--accent);
    border: 1px solid var(--accent-glow);
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    margin-left: 30px;
    font-size: 0.9rem;
    transition: color 0.3s;
}

nav a:hover {
    color: var(--accent);
}


/* Language Switcher */
.lang-switcher {
    display: inline-flex;
    margin-left: 20px;
    background: rgba(255, 255, 255, 0.05);
    padding: 2px;
    border-radius: 4px;
    border: 1px solid var(--border);
}

.lang-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 4px 8px;
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: 2px;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.2s;
}

.lang-btn:hover {
    color: var(--text-primary);
}

.lang-btn.active {
    background: var(--text-primary);
    color: #000;
    font-weight: 700;
}

/* Sections */
main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.hero {
    min-height: 80vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    position: relative;
    padding-top: 60px;
}

.badge {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent);
    letter-spacing: 2px;
    margin-bottom: 20px;
    border: 1px solid var(--accent-glow);
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(100, 255, 218, 0.05);
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -2px;
    margin-bottom: 24px;
}

.gradient-text {
    background: linear-gradient(120deg, #fff, var(--text-secondary));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 40px;
    word-break: keep-all;
    /* Prevents single character breaks in CJK */
    white-space: pre-wrap;
    /* Allows nice wrapping but respecting breaks */
}

.cta-group {
    display: flex;
    gap: 16px;
    margin-bottom: 60px;
}

.btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn.primary {
    background: var(--accent);
    color: #000;
    box-shadow: 0 0 20px var(--accent-glow);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px var(--accent-glow);
}

.btn.secondary {
    background: var(--card-bg);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--text-primary);
}

.btn.secondary.highlight-buy {
    border-color: #ffd700;
    color: #ffd700;
    box-shadow: 0 0 10px rgba(255, 215, 0, 0.1);
}

.btn.secondary.highlight-buy:hover {
    background: rgba(255, 215, 0, 0.1);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.2);
}

.hero-stats {
    display: flex;
    gap: 40px;
    border-top: 1px solid var(--border);
    padding-top: 30px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat .value {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat .label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Demo Section */
.demo {
    padding: 20px 0;
    text-align: center;
}

.video-container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

.video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    /* 16:9 Aspect Ratio */
    height: 0;
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(0, 255, 242, 0.05);
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary);
    background: radial-gradient(circle at center, rgba(0, 255, 242, 0.05), transparent);
}

.play-button {
    font-size: 4rem;
    color: var(--accent);
    margin-bottom: 1rem;
    opacity: 0.8;
    transition: transform 0.3s;
    cursor: pointer;
}

.video-wrapper:hover .play-button {
    transform: scale(1.1);
    opacity: 1;
}

.video-wrapper iframe,
.video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border: none;
}

/* Features */
.features {
    padding: 100px 0;
}

h2 {
    font-size: 2rem;
    margin-bottom: 40px;
    text-align: center;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 12px;
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent);
}

.card-icon {
    font-size: 2rem;
    margin-bottom: 20px;
}

.card h3 {
    margin-bottom: 10px;
    font-size: 1.2rem;
}

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

/* Guide */
.guide {
    padding: 60px 0 100px;
    background: linear-gradient(to bottom, transparent, rgba(100, 255, 218, 0.02));
}

.guide-container {
    max-width: 800px;
    margin: 0 auto;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.step {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.step-number {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent);
    opacity: 0.5;
    min-width: 40px;
}

.step h3 {
    margin-bottom: 8px;
    font-size: 1.1rem;
}

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

footer {
    text-align: center;
    padding: 40px;
    border-top: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .hero {
        min-height: auto;
        padding-bottom: 60px;
    }

    .cta-group {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
    }
}

/* Footer Compliance Links */
.footer-links {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.legal-links {
    font-size: 0.75rem;
    display: flex;
    gap: 10px;
    align-items: center;
}

.legal-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.legal-links a:hover {
    color: var(--accent);
}

.separator {
    color: var(--border);
}

/* Simple Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: #111;
    border: 1px solid var(--border);
    padding: 30px;
    border-radius: 12px;
    max-width: 500px;
    width: 90%;
}

.modal-content h3 {
    color: var(--text-primary);
    margin-bottom: 15px;
    text-align: left;
}

.modal-content p {
    color: var(--text-secondary);
    margin-bottom: 10px;
    font-size: 0.9rem;
}

.modal-content button {
    margin-top: 20px;
    width: 100%;
    justify-content: center;
}