/* ==================== CSS VARIABLES ==================== */
:root {
    --color-primary: #A63AE1;
    --color-text-primary: #FFFFFF;
    --color-text-secondary: rgba(255, 255, 255, 0.7);
    --color-text-tertiary: rgba(255, 255, 255, 0.5);
    --color-bg: #0A0A0A;
    --color-surface: #1A1A1A;
    --color-border: rgba(255, 255, 255, 0.1);
    --color-accent: rgba(166, 58, 225, 0.1);
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, system-ui, sans-serif;
    --max-width: 720px;
    --spacing: clamp(16px, 4vw, 24px);
}

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

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

body {
    font-family: var(--font-family);
    font-size: 15px;
    line-height: 1.7;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    padding: var(--spacing);
}

/* ==================== LAYOUT ==================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
}

/* ==================== TYPOGRAPHY ==================== */
h1 {
    font-size: clamp(32px, 5vw, 48px);
    font-weight: 700;
    color: var(--color-text-primary);
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}

h2 {
    font-size: clamp(20px, 3vw, 24px);
    font-weight: 600;
    color: var(--color-text-primary);
    letter-spacing: -0.01em;
    margin: 48px 0 16px;
}

h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    margin: 24px 0 12px;
}

p {
    margin-bottom: 16px;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: opacity 0.2s;
}

a:hover {
    opacity: 0.7;
}

strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

ul, ol {
    margin: 16px 0 16px 20px;
}

li {
    margin-bottom: 8px;
    padding-left: 8px;
}

/* ==================== HEADER ==================== */
.header {
    padding: 80px 0 40px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 40px;
    position: relative;
}

.meta {
    font-size: 13px;
    color: var(--color-text-tertiary);
    margin-top: 8px;
}

.lang-switcher {
    position: absolute;
    top: 0;
    right: 0;
    display: flex;
    gap: 8px;
}

.lang-btn {
    padding: 6px 12px;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: 4px;
    color: var(--color-text-secondary);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: var(--font-family);
}

.lang-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-text-primary);
}

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

/* ==================== SECTIONS ==================== */
.section {
    margin-bottom: 40px;
}

/* ==================== TABLE OF CONTENTS ==================== */
.toc {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    margin: 40px 0;
}

.toc-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 16px;
}

.toc-list {
    list-style: none;
    margin: 0;
}

.toc-list li {
    margin: 0;
    padding: 0;
}

.toc-list a {
    display: block;
    padding: 8px 0;
    color: var(--color-text-secondary);
    font-size: 14px;
    transition: all 0.2s;
}

.toc-list a:hover {
    color: var(--color-text-primary);
    opacity: 1;
    padding-left: 8px;
}

/* ==================== SERVICE CARDS ==================== */
.service-grid {
    display: grid;
    gap: 12px;
    margin: 24px 0;
}

.service-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    padding: 16px;
    transition: border-color 0.2s;
}

.service-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
}

.service-name {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: 8px;
    font-size: 14px;
}

.service-desc {
    font-size: 14px;
    margin-bottom: 12px;
}

.service-link {
    font-size: 13px;
}

/* ==================== HIGHLIGHT BOX ==================== */
.highlight {
    background: var(--color-accent);
    border-left: 2px solid var(--color-primary);
    padding: 16px;
    border-radius: 4px;
    margin: 24px 0;
    font-size: 14px;
}

/* ==================== SUBSCRIPTION TABLE ==================== */
.subscription-table {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 16px;
    margin: 24px 0;
    overflow-x: auto;
}

.subscription-table table {
    width: 100%;
    border-collapse: collapse;
}

.subscription-table th {
    text-align: left;
    padding: 12px;
    color: var(--color-text-primary);
    font-weight: 600;
    font-size: 14px;
    border-bottom: 1px solid var(--color-border);
}

.subscription-table td {
    padding: 12px;
    font-size: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.subscription-table tr:last-child td {
    border-bottom: none;
}

/* ==================== CONTACT BOX ==================== */
.contact {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 32px;
    text-align: center;
    margin: 40px 0;
}

.contact h3 {
    margin: 0 0 8px 0;
}

.contact p {
    margin-bottom: 24px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--color-primary);
    color: var(--color-text-primary);
    border-radius: 6px;
    font-weight: 500;
    font-size: 14px;
    transition: opacity 0.2s;
}

.btn:hover {
    opacity: 0.9;
}

.btn-group {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 16px;
}

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

/* ==================== FOOTER ==================== */
.footer {
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
    text-align: center;
}

.footer-links {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 24px;
}

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

.copyright {
    font-size: 13px;
    color: var(--color-text-tertiary);
    line-height: 1.6;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 640px) {
    .lang-switcher {
        position: static;
        margin-bottom: 40px;
    }

    .btn-group {
        flex-direction: column;
    }

    .btn {
        width: 100%;
    }

    .subscription-table {
        font-size: 13px;
    }

    .subscription-table th,
    .subscription-table td {
        padding: 8px;
    }
}

/* ==================== ACCESSIBILITY ==================== */
@media (prefers-reduced-motion: reduce) {
    * {
        animation: none !important;
        transition: none !important;
    }
    html {
        scroll-behavior: auto;
    }
}