/* ===== Reset & Base ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary: #6C5CE7;
    --primary-light: #A29BFE;
    --primary-dark: #5A4BD1;
    --bg: #0A0A0F;
    --bg-card: #12121A;
    --bg-card-hover: #1A1A25;
    --surface: #16161F;
    --border: #2A2A3A;
    --text: #E8E8ED;
    --text-muted: #8888A0;
    --text-dim: #5A5A70;
    --gradient: linear-gradient(135deg, #6C5CE7, #A29BFE, #74B9FF);
    --gradient-bg: linear-gradient(135deg, rgba(108, 92, 231, 0.15), rgba(162, 155, 254, 0.05));
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --shadow-glow: 0 0 60px rgba(108, 92, 231, 0.2);
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.3s ease;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
    max-width: 100vw;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 10px;
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 30px rgba(108, 92, 231, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
    background: rgba(108, 92, 231, 0.05);
}

.btn-sm { padding: 8px 20px; font-size: 14px; }
.btn-lg { padding: 16px 36px; font-size: 16px; }
.btn-block { width: 100%; }

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(42, 42, 58, 0.5);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
}

.logo-icon {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    border-radius: 10px;
    font-weight: 800;
    font-size: 18px;
    color: #fff;
}

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

.nav a {
    color: var(--text-muted);
    font-size: 15px;
    font-weight: 500;
}

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

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

.mobile-nav {
    display: none;
    flex-direction: column;
    padding: 16px 24px 24px;
    gap: 16px;
    border-top: 1px solid var(--border);
}

.mobile-nav.active {
    display: flex;
}

.mobile-nav a {
    color: var(--text-muted);
    font-size: 16px;
    font-weight: 500;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    padding: 160px 0 100px;
    text-align: center;
    overflow: hidden;
    max-width: 100vw;
}

.hero-bg {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.4;
}

.hero-glow-1 {
    width: 600px;
    height: 600px;
    background: var(--primary);
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.15;
}

.hero-glow-2 {
    width: 400px;
    height: 400px;
    background: #74B9FF;
    top: 0;
    right: 0;
    opacity: 0.08;
}

.hero-inner {
    position: relative;
    z-index: 1;
}

.badge {
    display: inline-flex;
    padding: 8px 18px;
    border-radius: 100px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.3);
    color: var(--primary-light);
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(36px, 5vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    max-width: 640px;
    margin: 0 auto 36px;
    font-size: 18px;
    color: var(--text-muted);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
}

.stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--text);
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ===== Section Common ===== */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-badge {
    display: inline-flex;
    padding: 6px 16px;
    border-radius: 100px;
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    color: var(--primary-light);
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: clamp(28px, 3.5vw, 42px);
    font-weight: 700;
    margin-bottom: 12px;
    letter-spacing: -0.02em;
}

.section-header p {
    color: var(--text-muted);
    font-size: 17px;
    max-width: 500px;
    margin: 0 auto;
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition);
}

.feature-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(108, 92, 231, 0.3);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(108, 92, 231, 0.1);
    border-radius: 14px;
    color: var(--primary-light);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ===== How it works ===== */
.how-it-works {
    padding: 100px 0;
}

.steps {
    display: flex;
    flex-direction: column;
    gap: 32px;
    max-width: 700px;
    margin: 0 auto;
}

.step {
    display: flex;
    gap: 28px;
    align-items: flex-start;
    padding: 32px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.step:hover {
    border-color: rgba(108, 92, 231, 0.3);
    background: var(--bg-card-hover);
}

.step-number {
    font-size: 32px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    flex-shrink: 0;
    min-width: 50px;
}

.step-content h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.6;
}

/* ===== Demo ===== */
.demo-section {
    padding: 40px 0 100px;
}

.demo-window {
    max-width: 600px;
    margin: 0 auto;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg-card);
    box-shadow: var(--shadow), var(--shadow-glow);
}

.demo-titlebar {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    background: rgba(22, 22, 31, 0.8);
    border-bottom: 1px solid var(--border);
}

.demo-dots {
    display: flex;
    gap: 7px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot-red { background: #FF5F57; }
.dot-yellow { background: #FEBC2E; }
.dot-green { background: #28C840; }

.demo-title {
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
}

.demo-body {
    padding: 24px;
}

.demo-summary {
    margin-bottom: 20px;
}

.demo-summary h4 {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 8px;
}

.demo-summary p {
    font-size: 15px;
    color: var(--text);
    line-height: 1.5;
}

.demo-choices {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.demo-choice {
    padding: 8px 18px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: transparent;
    color: var(--text-muted);
    font-size: 14px;
    font-weight: 500;
    cursor: default;
    font-family: inherit;
}

.demo-choice.active {
    background: rgba(108, 92, 231, 0.15);
    border-color: var(--primary);
    color: var(--primary-light);
}

.demo-input {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.demo-input-field {
    padding: 14px 16px;
}

.demo-placeholder {
    color: var(--text-dim);
    font-size: 14px;
}

.demo-input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 16px;
    border-top: 1px solid var(--border);
}

.demo-attach {
    font-size: 13px;
    color: var(--text-muted);
}

.demo-send {
    font-size: 13px;
    color: var(--primary-light);
    font-weight: 600;
}

/* ===== Pricing ===== */
.pricing {
    padding: 100px 0;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: start;
}

.pricing-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px;
    position: relative;
    transition: all var(--transition);
}

.pricing-card:hover {
    transform: translateY(-4px);
    border-color: rgba(108, 92, 231, 0.2);
}

.pricing-card-popular {
    border-color: var(--primary);
    background: var(--gradient-bg);
    box-shadow: var(--shadow-glow);
}

.pricing-card-popular:hover {
    border-color: var(--primary-light);
}

.popular-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 4px 16px;
    background: var(--gradient);
    color: #fff;
    font-size: 12px;
    font-weight: 600;
    border-radius: 100px;
    white-space: nowrap;
}

.pricing-header {
    margin-bottom: 28px;
}

.pricing-header h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.price {
    display: flex;
    align-items: baseline;
    gap: 4px;
    margin-bottom: 8px;
}

.price-amount {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.price-period {
    font-size: 15px;
    color: var(--text-muted);
}

.pricing-desc {
    color: var(--text-muted);
    font-size: 14px;
}

.pricing-features {
    list-style: none;
    margin-bottom: 28px;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.pricing-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.pricing-features .check {
    color: #28C840;
    font-weight: 600;
}

.pricing-features .cross {
    color: var(--text-dim);
}

.pricing-features .disabled {
    color: var(--text-dim);
}

/* ===== FAQ ===== */
.faq {
    padding: 100px 0;
}

.faq-list {
    max-width: 700px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: rgba(108, 92, 231, 0.3);
}

.faq-question {
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: var(--bg-card);
    border: none;
    color: var(--text);
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-card-hover);
}

.faq-arrow {
    transition: transform var(--transition);
    flex-shrink: 0;
    color: var(--text-muted);
}

.faq-item.active .faq-arrow {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.7;
}

/* ===== CTA ===== */
.cta {
    padding: 60px 0 100px;
}

.cta-inner {
    position: relative;
    text-align: center;
    padding: 80px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    width: 500px;
    height: 500px;
    background: var(--primary);
    border-radius: 50%;
    filter: blur(150px);
    opacity: 0.1;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.cta-inner h2 {
    font-size: clamp(24px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.cta-inner p {
    color: var(--text-muted);
    font-size: 17px;
    margin-bottom: 28px;
    position: relative;
    z-index: 1;
}

.cta-inner .btn {
    position: relative;
    z-index: 1;
}

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

.footer-inner {
    display: flex;
    justify-content: space-between;
    gap: 40px;
    padding-bottom: 40px;
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 14px;
    margin-top: 12px;
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    color: var(--text);
}

.footer-col a {
    color: var(--text-muted);
    font-size: 14px;
}

.footer-col a:hover {
    color: var(--text);
}

.footer-bottom {
    border-top: 1px solid var(--border);
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    color: var(--text-dim);
    font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 420px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav, .header .btn {
        display: none;
    }
    .mobile-menu-btn {
        display: flex;
    }
    .hero {
        padding: 130px 0 70px;
    }
    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }
    .stat-value {
        font-size: 22px;
    }
    .features-grid {
        grid-template-columns: 1fr;
    }
    .step {
        flex-direction: column;
        gap: 16px;
    }
    .footer-inner {
        flex-direction: column;
    }
    .footer-links {
        gap: 40px;
        flex-wrap: wrap;
    }
    .cta-inner {
        padding: 50px 24px;
    }
    .demo-choices {
        flex-wrap: wrap;
    }
    .hero-glow-1 {
        width: 300px;
        height: 300px;
    }
    .hero-glow-2 {
        display: none;
    }
    .container {
        padding: 0 16px;
    }
}