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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    line-height: 1.7;
    font-size: 1.2rem;
    -webkit-font-smoothing: antialiased;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 48px;
}

/* Header */
header {
    padding: 24px 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 64px;
}

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

.logo {
    display: flex;
    align-items: center;
    height: 50px;
}

.logo img {
    height: 100%;
    width: auto;
}

.logo-dark {
    display: none;
}

[data-theme="dark"] .logo-light {
    display: none;
}

[data-theme="dark"] .logo-dark {
    display: block;
}

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

nav a {
    color: var(--text);
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.7;
    transition: opacity 0.2s ease;
}

nav a:hover {
    opacity: 1;
}

/* Badge */
.badge {
    display: inline-block;
    background-color: var(--accent);
    color: var(--accent-text);
    padding: 4px 8px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-right: 8px;
    line-height: 1;
}

/* Typography */
h1 {
    font-size: 2rem;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 24px;
}

h2 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
    margin-top: 64px;
}

h3 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 8px;
}

p {
    font-size: 1.05rem;
    color: var(--text);
    max-width: 720px;
    margin-bottom: 24px;
    line-height: 1.7;
}

.text-muted {
    color: var(--muted);
    font-size: 1.1rem;
    line-height: 1.7;
}

/* Sections */
section {
    padding: 120px 0;
    transition: background-color 0.3s ease;
}

.section-alt {
    background-color: var(--bg-alt);
}

section .container > :first-child {
    margin-top: 0;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: var(--accent);
    color: var(--accent-text);
    padding: 12px 24px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.85rem;
    border-radius: var(--radius-md);
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn:hover {
    opacity: 0.85;
    transform: translateY(-1px);
}

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

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

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: center;
}

/* Cards */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    margin-bottom: 16px;
    transition: var(--transition);
}

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

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 16px;
    margin-top: 24px;
}

/* Slider */
.slider-container {
    position: relative;
    margin-top: 24px;
}

.slider-track {
    display: flex;
    gap: 16px;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 8px;
    scrollbar-width: thin;
    scrollbar-color: var(--border) transparent;
}

.slider-track::-webkit-scrollbar {
    height: 6px;
}

.slider-track::-webkit-scrollbar-track {
    background: transparent;
}

.slider-track::-webkit-scrollbar-thumb {
    background-color: var(--border);
    border-radius: 3px;
}

.slider-track .card {
    flex: 0 0 auto;
    width: min(320px, 85vw);
    scroll-snap-align: start;
    margin-bottom: 0;
}

.slider-nav {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 16px;
}

.slider-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
}

.slider-btn:hover {
    background-color: var(--accent);
    color: var(--accent-text);
    border-color: var(--accent);
}

/* Tier / Pricing style */
.tier-wrapper {
    background-color: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    margin-top: 24px;
}

.tier-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    border-bottom: 1px solid var(--border);
}

.tier-row:last-child {
    border-bottom: none;
}

.tier-cell {
    padding: 16px 20px;
    font-size: 0.9rem;
}

.tier-cell + .tier-cell {
    border-left: 1px solid var(--border);
}

.tier-label {
    font-weight: 700;
    color: var(--text);
}

.tier-muted {
    color: var(--muted);
    font-size: 0.85rem;
}

/* Module List Compact */
.module-list-compact {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.module-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.module-row:last-child {
    border-bottom: none;
}

.module-row:hover {
    opacity: 0.7;
}

.module-label {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    flex-wrap: wrap;
}

.module-label strong {
    font-size: 1rem;
    font-weight: 700;
}

.module-desc {
    font-size: 0.9rem;
    text-align: right;
    margin-bottom: 0;
    max-width: 600px;
    line-height: 1.5;
}

/* Contact List */
.contact-list {
    margin-top: 24px;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.contact-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 24px;
    padding: 14px 0;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
    flex-wrap: wrap;
}

.contact-row:last-child {
    border-bottom: none;
}

.contact-row:hover {
    opacity: 0.7;
}

.contact-action {
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    color: var(--text);
    white-space: nowrap;
    transition: var(--transition);
}

.contact-action:hover {
    color: var(--accent);
}

.contact-email {
    margin-top: 32px;
    font-size: 1rem;
}

.contact-email a {
    color: var(--text);
    font-weight: 700;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.contact-email a:hover {
    color: var(--accent);
}

/* Back to top */
.back-to-top {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 48px;
    height: 48px;
    background-color: var(--text);
    color: var(--bg);
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s ease, background-color 0.2s ease;
    z-index: 1000;
    padding: 0;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background-color: var(--accent);
    color: var(--accent-text);
}

/* Steps */
.step-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-top: 24px;
}

.step-item {
    display: flex;
    align-items: baseline;
    gap: 12px;
}

.step-num {
    font-variant-numeric: tabular-nums;
    color: var(--muted);
    font-size: 0.9rem;
    min-width: 28px;
}

/* FAQ */
.faq-list {
    margin-top: 24px;
}

.faq-item {
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
}

.faq-item:first-child {
    border-top: 1px solid var(--border);
}

.faq-q {
    font-weight: 700;
    margin-bottom: 6px;
    cursor: pointer;
}

.faq-a {
    color: var(--muted);
    font-size: 1rem;
    max-width: 100%;
    margin-bottom: 0;
    line-height: 1.7;
}

/* Form */
.form-inline {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: 12px;
}

.form-inline input[type="email"] {
    flex: 1;
    min-width: 200px;
    padding: 10px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
}

.form-inline input[type="email"]:focus {
    outline: none;
    border-color: var(--muted);
}

/* Theme toggle */
#theme-toggle {
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    padding: 4px 10px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

#theme-toggle:hover {
    background-color: var(--accent);
    color: var(--accent-text);
}

/* Footer */
footer {
    padding: 80px 0 40px 0;
    border-top: none;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.footer-left p {
    font-size: 0.85rem;
    margin-bottom: 12px;
}

.footer-right {
    text-align: right;
}

.footer-links {
    display: flex;
    gap: 16px;
    justify-content: flex-end;
    margin-top: 8px;
}

.footer-links a {
    color: var(--muted);
    text-decoration: none;
    font-size: 0.8rem;
}

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

.copyright {
    font-size: 0.75rem;
    color: var(--muted);
    margin-top: 32px;
    text-align: center;
}

/* Checklist */
.check-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px 40px;
    margin-top: 24px;
}

.check-item {
    display: flex;
    align-items: baseline;
    gap: 10px;
    font-size: 1rem;
    line-height: 1.5;
}

.check-mark {
    color: var(--accent);
    font-weight: 700;
    font-size: 1.1rem;
    line-height: 1;
    flex-shrink: 0;
}

/* Responsive */
@media (max-width: 640px) {
    h1 { font-size: 1.6rem; }
    h2 { font-size: 1.25rem; }
    .container { padding: 0 24px; }
    header { flex-direction: column; gap: 16px; align-items: flex-start; }
    header .container { flex-direction: column; gap: 16px; align-items: flex-start; }
    nav { gap: 16px; flex-wrap: wrap; }
    .card-grid { grid-template-columns: 1fr; }
    .tier-row { grid-template-columns: 1fr; }
    .tier-cell + .tier-cell { border-left: none; border-top: 1px solid var(--border); }
    .footer-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-right { text-align: left; }
    .footer-links { justify-content: flex-start; }
    .check-list { grid-template-columns: 1fr; }
    .module-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 16px 0;
    }
    .module-desc {
        text-align: left;
        max-width: 100%;
    }
    .contact-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
        padding: 16px 0;
    }
    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 16px;
        right: 16px;
    }
}