/* ===== CSS Variables & Setup ===== */
:root {
    --primary-color: #9d4edd;
    --primary-hover: #c77dff;
    --bg-dark: #0f0c29;
    --bg-darker: #0d0a1b;
    --text-main: #ffffff;
    --text-muted: #a0a0b0;
    --card-bg: rgba(25, 20, 50, 0.6);
    --border-color: rgba(255, 255, 255, 0.1);
    --gradient-bg: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
}

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    background: var(--gradient-bg);
    z-index: -1;
    top: 0;
    left: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s ease;
}

/* ===== Buttons ===== */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    border: none;
    box-shadow: 0 4px 15px rgba(157, 78, 221, 0.4);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(199, 125, 255, 0.6);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary-color);
    color: var(--text-main);
}

.btn-outline:hover {
    background: var(--primary-color);
}

.btn-large {
    padding: 15px 40px;
    font-size: 1.1rem;
    border-radius: 50px;
}

/* ===== Header ===== */
.header {
    padding: 20px 0;
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 100;
    background: rgba(15, 12, 41, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to right, #e0aaff, #c77dff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav a {
    margin: 0 15px;
    font-weight: 500;
}

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

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

.hero-content {
    max-width: 800px;
}

.hero h1 {
    font-size: 4rem;
    margin-bottom: 20px;
    line-height: 1.2;
    background: linear-gradient(to right, #fff, #c77dff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 40px;
}

/* ===== Section Shared ===== */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 50px;
    font-weight: 700;
}

.pricing, .faq {
    padding: 100px 0;
}

/* ===== Pricing Section ===== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    align-items: stretch;
}

.pricing-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 40px 30px;
    backdrop-filter: blur(10px);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.pricing-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-color: var(--primary-color);
}

.pricing-card.highlighted {
    border-color: var(--primary-color);
    background: rgba(157, 78, 221, 0.1);
}

.plan-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.plan-price {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 30px;
}

.plan-price span {
    font-size: 1rem;
    color: var(--text-muted);
    font-weight: 400;
}

.plan-features {
    list-style: none;
    margin-bottom: 40px;
    flex-grow: 1;
}

.plan-features li {
    margin-bottom: 10px;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.plan-btn {
    width: 100%;
}

/* ===== FAQ Section ===== */
.faq-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    margin-bottom: 15px;
    overflow: hidden;
}

.faq-question {
    width: 100%;
    padding: 20px;
    background: transparent;
    border: none;
    color: var(--text-main);
    font-size: 1.1rem;
    font-weight: 600;
    text-align: left;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.faq-question .icon {
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.faq-question.active .icon {
    transform: rotate(45deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out;
}

.faq-answer p {
    padding: 0 20px 20px;
    color: var(--text-muted);
}

/* ===== Footer ===== */
.footer {
    background: var(--bg-darker);
    padding: 60px 0 20px;
    border-top: 1px solid var(--border-color);
}

.footer-container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    background: linear-gradient(to right, #e0aaff, #c77dff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.footer-info p {
    color: var(--text-muted);
    max-width: 300px;
}

.footer-links h4 {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

.footer-links a {
    display: block;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.footer-links a:hover {
    color: var(--primary-hover);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav {
        display: none; /* In a real app, implement mobile menu */
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-info p {
        margin: 0 auto;
    }
}