:root {
    --bg-main: #09090b;
    --bg-card: #141416;
    --bg-card-hover: #1c1c1f;
    --border: #27272a;
    --border-hover: #3f3f46;
    --text-primary: #f4f4f5;
    --text-secondary: #a1a1aa;
    --accent: #10b981;
    --accent-dim: rgba(16, 185, 129, 0.1);
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    padding-top: 80px;
    overflow-x: hidden;
}

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

/* Header & Nav */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 70px;
    background: rgba(9, 9, 11, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.logo span {
    color: var(--accent);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 24px;
}

/* Language Dropdown */
.lang-dropdown {
    position: relative;
}

.lang-toggle {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: 6px;
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s;
}

.lang-toggle:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.lang-toggle .flag {
    font-size: 16px;
    line-height: 1;
}

.lang-toggle .arrow {
    font-size: 10px;
    color: var(--text-secondary);
    transition: transform 0.2s;
}

.lang-dropdown.open .lang-toggle .arrow {
    transform: rotate(180deg);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    min-width: 180px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 6px;
    display: none;
    flex-direction: column;
    gap: 2px;
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
    z-index: 1001;
}

.lang-dropdown.open .lang-menu {
    display: flex;
}

.lang-option {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 13px;
    font-weight: 500;
    padding: 8px 10px;
    border-radius: 5px;
    transition: background 0.15s, color 0.15s;
}

.lang-option:hover {
    background: var(--bg-card-hover);
    color: var(--text-primary);
}

.lang-option.active {
    background: var(--border);
    color: var(--text-primary);
}

.lang-option .flag {
    font-size: 16px;
    line-height: 1;
}

.btn-secondary {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
}

.btn-primary {
    background: var(--accent);
    color: #000;
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 6px;
    transition: opacity 0.2s;
}

.btn-primary:hover {
    opacity: 0.9;
}

/* Hero Section */
.hero {
    padding: 80px 0 60px;
    text-align: center;
}

.badge {
    display: inline-flex;
    align-items: center;
    background: var(--accent-dim);
    color: var(--accent);
    font-size: 24px;
    font-weight: 500;
    padding: 4px 12px;
    border-radius: 9999px;
    border: 1px solid rgba(16, 185, 129, 0.2);
    margin-bottom: 24px;
}

h1 {
    font-size: 44px;
    font-weight: 600;
    letter-spacing: -1.5px;
    line-height: 1.1;
    max-width: 800px;
    margin: 0 auto 24px;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 18px;
    max-width: 600px;
    margin: 0 auto 32px;
}

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

.hero-actions .btn-primary {
    padding: 12px 28px;
    font-size: 16px;
}

.hero-actions .btn-secondary {
    padding: 12px 28px;
    font-size: 16px;
    border: 1px solid var(--border);
    border-radius: 6px;
    transition: background 0.2s;
}

.hero-actions .btn-secondary:hover {
    background: var(--bg-card);
}

/* Channels Showcase */
.channels-bar {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 60px;
    padding: 10px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.channel-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
}

.brand-icon {
    width: 32px;
    height: 32px;
    border-radius: 5px;
    object-fit: contain;
    display: block;
}

/* Grid Sections */
section {
    padding: 80px 0;
}

.section-title {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 12px;
    text-align: center;
}

.section-subtitle {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 48px;
    font-size: 16px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 24px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    transition: border-color 0.2s, background 0.2s;
}

.card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.card-icon {
    color: var(--accent);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
}

.card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* Steps */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 62px;
    position: relative;
}

.step-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px;
    transition: border-color 0.2s, background 0.2s;
}

.step-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.step-card:not(:last-child)::after {
    content: "→";
    position: absolute;
    top: 50%;
    right: -42px;
    transform: translateY(-50%);
    font-size: 32px;
    color: var(--accent);
    font-family: var(--font-mono);
    pointer-events: none;
    z-index: 1;
}

.step-num {
    font-family: var(--font-mono);
    font-size: 18px;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 6px;
    display: block;
}

.step-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* Pricing Grid */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
    margin-bottom: 48px;
}

.price-card {
    display: flex;
    flex-direction: column;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    position: relative;
}

.price-card.recommended {
    border-color: var(--accent);
}

.rec-badge {
    position: absolute;
    top: -12px;
    right: 24px;
    background: var(--accent);
    color: #000;
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.price-card h3 {
    font-size: 20px;
    margin-bottom: 4px;
}

.price-desc {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 24px;
}

.price-amount {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.price-features {
    list-style: none;
    margin-bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.price-features li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.price-features li::before {
    content: "✓";
    color: var(--accent);
}

.price-card .btn-secondary,
.price-card .btn-primary {
    text-align: center;
    margin-top: auto;
    padding: 10px;
}

.price-card .btn-secondary {
    border: 1px solid var(--border);
    border-radius: 6px;
}

/* Live Analytics Simulation */
.analytics-panel {
    background: #0f0f11;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    font-family: var(--font-mono);
    max-width: 600px;
    margin: 40px auto 0;
}

.log-row {
    display: flex;
    gap: 16px;
    font-size: 13px;
    margin-bottom: 12px;
    opacity: 0.8;
}

.log-time { color: var(--text-secondary); }
.log-status { color: var(--accent); font-weight: bold; }

/* Interactive Calculator Container */
.calculator-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
    max-width: 500px;
    margin: 0 auto;
}

.calc-group {
    margin-bottom: 20px;
}

.calc-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.calc-select,
.calc-input {
    width: 100%;
    background: #09090b;
    border: 1px solid var(--border);
    color: var(--text-primary);
    padding: 12px;
    border-radius: 6px;
    font-family: var(--font-sans);
    font-size: 15px;
    outline: none;
}

.calc-select:focus,
.calc-input:focus {
    border-color: var(--border-hover);
}

.calc-result {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.calc-result-label {
    font-size: 14px;
    color: var(--text-secondary);
}

.calc-result-val {
    font-family: var(--font-mono);
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
}

/* FAQ Accordion */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: border-color 0.2s, background 0.2s;
}

.faq-item:hover {
    border-color: var(--border-hover);
}

.faq-item.open {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

.faq-question {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 16px;
    font-weight: 600;
    text-align: left;
    padding: 20px 56px 20px 24px;
    cursor: pointer;
    position: relative;
    line-height: 1.4;
}

.faq-question:hover {
    color: var(--accent);
}

.faq-question::after {
    content: "+";
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 22px;
    font-weight: 400;
    color: var(--accent);
    transition: transform 0.25s ease;
}

.faq-item.open .faq-question::after {
    content: "−";
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.35s ease;
    padding: 0 24px;
}

.faq-item.open .faq-answer {
    max-height: 500px;
    padding: 0 24px 20px 24px;
}

.faq-answer p {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.6;
}

footer {
    border-top: 1px solid var(--border);
    padding: 40px 0;
    margin-top: 80px;
    text-align: center;
    color: var(--text-secondary);
    font-size: 13px;
}

@media (max-width: 768px) {
    h1 { font-size: 32px; }
    .grid-2, .grid-3, .pricing-grid, .channels-bar {
        grid-template-columns: 1fr;
    }
    .channels-bar {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }
    .steps-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    .step-card:not(:last-child)::after {
        content: "↓";
        right: 50%;
        top: auto;
        bottom: -22px;
        transform: translateX(50%);
    }
}