/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: #0f172a;
    color: #cbd5e1;
    line-height: 1.7;
    font-size: 16px;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Header */
.header {
    background: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
    padding: 48px 0;
}

.back-link {
    display: inline-flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 14px;
    margin-bottom: 24px;
    transition: color 0.2s;
}

.back-link:hover {
    color: #fff;
}

.header-content {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo-icon {
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
}

.header h1 {
    color: #fff;
    font-size: 2rem;
    font-weight: 700;
}

.subtitle {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin-top: 4px;
}

/* Main */
.main {
    padding: 48px 0;
}

.content-card {
    background: #1e293b;
    border-radius: 16px;
    border: 1px solid #334155;
    padding: 48px;
}

@media (max-width: 640px) {
    .content-card {
        padding: 24px;
    }
    
    .header h1 {
        font-size: 1.5rem;
    }
}

/* Intro */
.intro {
    font-size: 1.125rem;
    color: #94a3b8;
}

.intro strong {
    color: #fff;
}

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

.section:last-child {
    margin-bottom: 0;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.section-header h2 {
    color: #fff;
    font-size: 1.25rem;
    font-weight: 600;
}

.icon {
    font-size: 24px;
}

.icon.blue { color: #3b82f6; }
.icon.purple { color: #a855f7; }
.icon.green { color: #22c55e; }
.icon.yellow { color: #eab308; }
.icon.orange { color: #f97316; }
.icon.red { color: #ef4444; }
.icon.cyan { color: #06b6d4; }
.icon.pink { color: #ec4899; }

.section-content {
    padding-left: 36px;
}

.section-content p {
    margin-bottom: 16px;
}

.section-content ul {
    list-style: disc;
    padding-left: 20px;
    margin-bottom: 16px;
}

.section-content li {
    margin-bottom: 8px;
}

.section-content li strong {
    color: #fff;
}

/* Alert Box */
.alert {
    padding: 16px;
    border-radius: 8px;
    margin-top: 16px;
}

.alert.info {
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    color: #93c5fd;
}

.alert strong {
    color: #60a5fa;
}

/* Contact Box */
.contact-box {
    background: rgba(71, 85, 105, 0.5);
    border-radius: 8px;
    padding: 20px;
    margin-top: 16px;
}

.contact-box p {
    margin-bottom: 8px;
}

.contact-box p:last-child {
    margin-bottom: 0;
}

.contact-box strong {
    color: #fff;
}

.contact-box a {
    color: #60a5fa;
    text-decoration: none;
}

.contact-box a:hover {
    text-decoration: underline;
}

/* Footer Note */
.footer-note {
    padding-top: 32px;
    border-top: 1px solid #334155;
}

.footer-note p {
    color: #64748b;
    font-size: 14px;
}

/* Footer Links */
.footer-links {
    margin-top: 32px;
    text-align: center;
}

.link-primary {
    color: #60a5fa;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.link-primary:hover {
    color: #93c5fd;
}

/* Footer */
.footer {
    background: #1e293b;
    border-top: 1px solid #334155;
    padding: 24px 0;
    text-align: center;
}

.footer p {
    color: #64748b;
    font-size: 14px;
}

/* Responsive */
@media (max-width: 640px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .section-content {
        padding-left: 0;
    }
}