:root {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0284c7;
    --border: #334155;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
    padding: 40px 20px;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    border: 1px solid var(--border);
    box-shadow: 0 10px 25px rgba(0,0,0,0.3);
}

header {
    border-bottom: 1px solid var(--border);
    padding-bottom: 24px;
    margin-bottom: 32px;
}

.app-brand {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 8px;
}

h1 {
    font-size: 28px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 8px;
}

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

section {
    margin-bottom: 28px;
}

h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 12px;
    border-left: 3px solid var(--accent);
    padding-left: 10px;
}

p {
    color: #cbd5e1;
    margin-bottom: 12px;
    font-size: 15px;
}

ul {
    margin-left: 20px;
    margin-bottom: 12px;
    color: #cbd5e1;
    font-size: 15px;
}

li {
    margin-bottom: 6px;
}

.highlight-box {
    background: rgba(56, 189, 248, 0.08);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 8px;
    padding: 16px;
    margin: 16px 0;
}

.highlight-box p {
    margin-bottom: 0;
    color: #f1f5f9;
}

footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 13px;
    color: var(--text-muted);
}

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

a:hover {
    text-decoration: underline;
}

/* Site navigation */

.site-nav {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 16px;
    max-width: 960px;
    margin: 0 auto 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.nav-brand {
    font-size: 18px;
    font-weight: 700;
    color: #ffffff;
}

.nav-brand a {
    color: inherit;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 24px;
}

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

.nav-links a:hover {
    color: var(--accent);
    text-decoration: none;
}

/* Landing page layout */

.page {
    max-width: 960px;
    margin: 0 auto;
}

.hero {
    text-align: center;
    padding: 20px 20px 60px;
}

.hero-icon {
    width: 96px;
    height: 96px;
    border-radius: 22px;
    margin-bottom: 20px;
    box-shadow: 0 8px 24px rgba(0,0,0,0.35);
}

.hero h1 {
    font-size: 40px;
    margin-bottom: 12px;
}

.hero .tagline {
    color: var(--text-muted);
    font-size: 18px;
    max-width: 560px;
    margin: 0 auto;
}

.page section {
    margin-bottom: 64px;
}

.page > section > h2 {
    font-size: 26px;
    border-left: none;
    padding-left: 0;
    margin-bottom: 28px;
    text-align: center;
}

.plan-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    max-width: 640px;
    margin: 0 auto 32px;
}

.plan-card {
    flex: 1;
    min-width: 220px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 28px 24px;
    text-align: center;
}

.plan-card.featured {
    border-color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent);
}

.plan-card h3 {
    font-size: 18px;
    color: #ffffff;
    margin-bottom: 12px;
}

.plan-price {
    font-size: 28px;
    font-weight: 700;
    color: var(--accent);
    margin-bottom: 20px;
}

.plan-price span {
    display: block;
    font-size: 13px;
    font-weight: 400;
    color: var(--text-muted);
    margin-top: 4px;
}

.plan-card ul {
    list-style: none;
    margin: 0;
    text-align: left;
}

.plan-card li {
    padding: 8px 0;
    border-top: 1px solid var(--border);
}

.plan-card li:first-child {
    border-top: none;
}

.download-button {
    display: block;
    width: 200px;
    margin: 0 auto;
}

.download-button img {
    width: 100%;
    height: auto;
    display: block;
}

/* Features */

.feature-row {
    display: flex;
    align-items: center;
    gap: 40px;
    margin-bottom: 40px;
}

.feature-row.reverse {
    flex-direction: row-reverse;
}

.feature-text {
    flex: 1;
}

.feature-text h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 10px;
}

.feature-image-placeholder {
    flex: 1;
    aspect-ratio: 4 / 3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--card-bg);
    border: 1px dashed var(--border);
    border-radius: 12px;
    color: var(--text-muted);
    font-size: 14px;
}

.feature-image {
    flex: 1;
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    border: 1px solid var(--border);
}

.feature-other {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 32px;
}

.feature-other h3 {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 18px;
    text-align: center;
}

.feature-other ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px 32px;
    margin: 0;
}

.feature-other li {
    position: relative;
    padding-left: 26px;
    color: #cbd5e1;
    font-size: 15px;
}

.feature-other li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: 700;
}

.section-intro {
    text-align: center;
    color: var(--text-muted);
    max-width: 560px;
    margin: -12px auto 28px;
}

/* Getting started steps */

.steps-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.steps-list li {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px 20px;
}

.step-number {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--accent);
    color: var(--bg-color);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* FAQ */

.faq-item {
    background: var(--card-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 16px;
}

.faq-item h3 {
    font-size: 16px;
    color: #ffffff;
    margin-bottom: 8px;
}

.faq-item p {
    margin-bottom: 0;
}

@media (max-width: 640px) {
    .feature-row,
    .feature-row.reverse {
        flex-direction: column;
    }
}

/* Forms */

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    margin-bottom: 8px;
}

.form-group input[type="text"],
.form-group textarea {
    width: 100%;
    background: var(--bg-color);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 12px 14px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-main);
}

.form-group textarea {
    resize: vertical;
    min-height: 160px;
}

.form-group input[type="text"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
}

.form-actions {
    text-align: center;
}

.btn-primary {
    display: inline-block;
    background: var(--accent);
    color: var(--bg-color);
    font-size: 15px;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    padding: 12px 28px;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--accent-hover);
    color: #ffffff;
}

.form-note {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: 12px;
}