:root {
    /* Lightning Blue & Geek Green Theme */
    --bg-dark: #050505;
    /* Deep Black */
    --bg-darker: #000000;

    /* The Clash Colors */
    --primary: #00f0ff;
    /* Lightning Blue (Lines, Borders, Text) */
    --secondary: #00ff9d;
    /* Geek Green (Glows, Buttons) */

    --primary-glow: #00f0ff;
    --secondary-glow: #00ff9d;

    --text-main: #e5e5e5;
    --text-muted: #94a3b8;

    /* Gradients */
    --accent-gradient: linear-gradient(135deg, var(--secondary) 0%, #00cc7a 100%);
    /* Green Gradient for Buttons */
    --bg-gradient: radial-gradient(circle at top, rgba(0, 240, 255, 0.05), transparent 40%);

    /* Cards (Darker Glass + Blue Border + Green Shadow) */
    --card-bg: rgba(10, 10, 10, 0.8);
    --card-border: rgba(0, 240, 255, 0.3);
    /* Blue Border */
    --card-shadow: 0 0 15px rgba(0, 255, 157, 0.05);
    /* Faint Green Glow */

    /* Navigation */
    --nav-height: 80px;
    --nav-bg: rgba(5, 5, 5, 0.9);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    background-image: var(--bg-gradient);
    background-attachment: fixed;
}

/* Background Effects */
#bg-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    pointer-events: none;
    /* Let clicks pass through */
}

/* Typography */
h1,
h2,
h3,
h4 {
    line-height: 1.2;
    font-weight: 700;
    color: white;
}

.text-gradient {
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
}

/* Navigation */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 100;
    border-bottom: 1px solid var(--card-border);
    box-shadow: 0 1px 0 rgba(0, 255, 157, 0.1);
    /* Green bottom hint */
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    height: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--primary);
    /* Blue Logo Text */
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.nav-links a:hover {
    color: var(--secondary);
    /* Green Hover */
    text-shadow: 0 0 8px var(--secondary);
}

.cta-button {
    background: var(--accent-gradient);
    /* Green Button */
    padding: 12px 28px;
    border-radius: 4px;
    color: #000;
    /* Dark text on bright green */
    text-decoration: none;
    font-weight: 700;
    letter-spacing: 0.02em;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.3);
    /* Green Glow */
    border: none;
}

.cta-button:hover {
    transform: translateY(-2px);
    color: white;
    background: var(--primary);
    /* Shift to Blue? Or just Glow? User said Blue Glow on Hover */
    /* Let's keep Green bg but add intense Blue Glow + Blue Border maybe? */
    /* "Button is Green, Hover effect use Blue Glow" */
    box-shadow: 0 0 20px var(--primary), 0 0 40px var(--primary);
    /* Intense Blue Glow */
    text-shadow: 0 0 5px rgba(255, 255, 255, 0.8);
}

/* Secondary Button (Outline) */
.secondary-button {
    background: transparent;
    padding: 12px 28px;
    border-radius: 4px;
    color: var(--primary);
    /* Blue Text */
    text-decoration: none;
    font-weight: 600;
    border: 1px solid var(--primary);
    /* Blue Border */
    transition: all 0.3s ease;
    box-shadow: 0 0 5px rgba(0, 240, 255, 0.2);
}

.secondary-button:hover {
    background: rgba(0, 240, 255, 0.1);
    box-shadow: 0 0 20px var(--secondary);
    /* Green Glow on Hover for contrast? Or Blue? Let's stick to theme: Blue Border -> Green Glow clash */
    border-color: var(--secondary);
    color: var(--secondary);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 20px 80px;
}

.hero-content {
    max-width: 900px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero h1 span {
    display: block;
    margin-top: 8px;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 40px;
}

/* Sections General */
section {
    padding: 100px 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 16px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    margin-bottom: 60px;
    font-size: 1.1rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Product Grid */
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.product-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    /* Blue Border */
    padding: 32px;
    border-radius: 4px;
    /* Techy corners */
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    color: var(--text-main);
    box-shadow: var(--card-shadow);
}

.product-card:hover {
    transform: translateY(-5px);
    border-color: var(--secondary);
    /* Hover -> Green Border */
    box-shadow: 0 0 30px rgba(0, 255, 157, 0.2);
    /* Green Glow */
}

.product-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 2px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
    text-transform: uppercase;
}

.badge-active {
    background: rgba(0, 255, 157, 0.1);
    color: var(--secondary);
    border: 1px solid var(--secondary);
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.2);
}

.badge-coming {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-muted);
    border: 1px dashed var(--text-muted);
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 12px;
    color: var(--primary);
    /* Blue Title */
}

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

/* Feature Spotlight (pCloud) */
.feature-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
    margin-top: 40px;
}

.feature-item {
    background: var(--bg-darker);
    border: 1px solid var(--card-border);
    padding: 30px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.feature-item:hover {
    border-color: var(--primary);
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.15);
    /* Blue Glow */
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 16px;
    color: var(--secondary);
    /* Green Icon */
    text-shadow: 0 0 10px rgba(0, 255, 157, 0.4);
}

.feature-item h4 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: white;
}

.feature-item p {
    color: var(--text-muted);
    font-size: 0.95rem;
}

/* Personas / Use Cases */
.personas {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.persona-card {
    text-align: center;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.05);
    background: rgba(255, 255, 255, 0.02);
    border-radius: 4px;
}

.persona-icon {
    width: 64px;
    height: 64px;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 1.5rem;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.2);
}

/* Footer */
footer {
    border-top: 1px solid var(--card-border);
    padding: 60px 20px;
    margin-top: 60px;
    background: var(--bg-darker);
    text-align: center;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--secondary), transparent);
    /* Green top border fade */
    opacity: 0.5;
}

.footer-links {
    margin-bottom: 20px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    margin: 0 15px;
    transition: color 0.2s, text-shadow 0.2s;
}

.footer-links a:hover {
    color: var(--primary);
    text-shadow: 0 0 8px var(--primary);
}

.copyright {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* Pages / Articles */
.page-content {
    padding-top: calc(var(--nav-height) + 60px);
    max-width: 900px;
    margin: 0 auto;
    padding-bottom: 80px;
}

.article-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    padding: 60px;
    backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
}

.article-card h1 {
    margin-bottom: 24px;
    font-size: 2.5rem;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
}

.article-card h2 {
    margin-top: 40px;
    margin-bottom: 20px;
    font-size: 1.8rem;
    color: var(--secondary);
    /* Green Headers */
}

.article-card p,
.article-card li {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 16px;
}

.article-card ul {
    padding-left: 24px;
    margin-bottom: 24px;
}

.article-card a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px dashed var(--primary);
    transition: all 0.2s;
}

.article-card a:hover {
    color: var(--secondary);
    border-color: var(--secondary);
    text-shadow: 0 0 8px var(--secondary);
}

/* Nav Right Grouping */
.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.lang-button {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 99px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.2s ease;
}

.lang-button:hover {
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.3);
}

/* Utilities */
.hidden {
    display: none !important;
}

/* Payment Method Cards */
.payment-methods {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 25px;
}

.method-card {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 15px 25px;
    background: rgba(255, 255, 255, 0.03);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    user-select: none;
    font-weight: 600;
    position: relative;
    min-width: 160px;
    text-align: center;
}

.method-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.method-card.selected {
    border-color: var(--secondary, #00ff9d);
    background: rgba(0, 255, 157, 0.1);
    box-shadow: 0 0 15px rgba(0, 255, 157, 0.2);
    color: #fff;
}

.method-card input {
    margin-right: 8px;
    /* Hide the radio button itself if we want a pure button look, but keep for accessibility for now or style custom */
    accent-color: var(--secondary);
}

.method-card.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    background: rgba(100, 100, 100, 0.1);
    border-color: rgba(100, 100, 100, 0.2);
    filter: grayscale(1);
}

.method-card.disabled:hover {
    background: rgba(100, 100, 100, 0.1);
    transform: none;
    border-color: rgba(100, 100, 100, 0.2);
}

/* Text Button (Language Toggle) */
.btn-text {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-family: inherit;
    font-size: 1rem;
    padding: 5px 10px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s;
}

.btn-text:hover {
    color: var(--primary);
    text-shadow: 0 0 5px var(--primary);
}

.btn-primary {
    background: var(--accent-gradient);
    color: #000;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-weight: 700;
    transition: all 0.3s;
    box-shadow: 0 0 10px rgba(0, 255, 157, 0.3);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    background: var(--primary);
    box-shadow: 0 0 20px var(--primary);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    filter: grayscale(100%);
}