:root {
    --primary-color: #007bff;
    --bg-color: #ffffff;
    --text-color: #333333;
    --secondary-bg: #f8f9fa;
    --border-color: #e9ecef;
    --code-bg: #f1f3f5;
}

@media (prefers-color-scheme: dark) {
    :root {
        --primary-color: #4dabf7;
        --bg-color: #1a1a1a;
        --text-color: #e0e0e0;
        --secondary-bg: #2d2d2d;
        --border-color: #404040;
        --code-bg: #333333;
    }
}

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

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

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
header {
    padding: 20px 0;
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    background-color: var(--bg-color);
    z-index: 100;
    opacity: 0.98;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-weight: bold;
    font-size: 1.5rem;
    color: var(--text-color);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    width: 32px;
    height: 32px;
    border-radius: 6px;
}

.nav-links a {
    margin-left: 20px;
    text-decoration: none;
    color: var(--text-color);
    font-size: 0.95rem;
}

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

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

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    background: linear-gradient(45deg, var(--primary-color), #a688fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

@media (prefers-color-scheme: dark) {
    .hero p { color: #aaa; }
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 500;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

/* Sections */
section {
    padding: 60px 0;
    border-bottom: 1px solid var(--border-color);
}

section:last-child {
    border-bottom: none;
}

h2 {
    font-size: 2rem;
    margin-bottom: 30px;
    position: relative;
}

h3 {
    margin: 20px 0 10px;
    font-size: 1.3rem;
}

p {
    margin-bottom: 15px;
}

ol, ul {
    margin-bottom: 20px;
    padding-left: 25px;
}

li {
    margin-bottom: 8px;
}

code {
    background-color: var(--code-bg);
    padding: 2px 6px;
    border-radius: 4px;
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    font-size: 0.9em;
}

.step-card {
    background-color: var(--secondary-bg);
    padding: 20px;
    border-radius: 10px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
}

.note {
    margin-top: 15px;
    padding: 15px;
    background-color: rgba(255, 193, 7, 0.1);
    border-left: 4px solid #ffc107;
    border-radius: 4px;
    font-size: 0.95em;
}

.note > strong {
    display: block;
    margin-bottom: 5px;
    color: #d39e00;
}

@media (prefers-color-scheme: dark) {
    .note {
        background-color: rgba(255, 193, 7, 0.05);
    }
    .note > strong {
        color: #ffc107;
    }
}

/* FAQ */
details {
    background-color: var(--secondary-bg);
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
}

summary {
    padding: 15px 20px;
    cursor: pointer;
    font-weight: 600;
    list-style: none;
    position: relative;
}

summary::-webkit-details-marker {
    display: none;
}

summary::after {
    content: '+';
    position: absolute;
    right: 20px;
    font-weight: bold;
}

details[open] summary::after {
    content: '-';
}

details p {
    padding: 0 20px 20px;
    margin: 0;
    color: #666;
}

@media (prefers-color-scheme: dark) {
    details p { color: #aaa; }
}

/* Footer */
footer {
    text-align: center;
    padding: 40px 0;
    color: #666;
    font-size: 0.9rem;
}

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