:root {
    --bg-color: #0b111e;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(51, 65, 85, 0.8);
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --accent: #38bdf8;
    --accent-hover: #0ea5e9;
    --accent-glow: rgba(56, 189, 248, 0.25);
    --friend-accent: #10b981;
    --friend-glow: rgba(16, 185, 129, 0.25);
    --success: #22c55e;
    --error: #ef4444;
}

* {
    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);
    background-image: 
        radial-gradient(at 0% 0%, rgba(56, 189, 248, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(16, 185, 129, 0.05) 0px, transparent 50%);
    color: var(--text-main);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 3rem 1.5rem;
}

header {
    text-align: center;
    padding: 4rem 0 3rem;
}

header h1 {
    font-size: 3.2rem;
    font-weight: 900;
    letter-spacing: -0.05em;
    margin-bottom: 0.75rem;
    text-shadow: 0 0 20px var(--accent-glow);
}

header h1 a {
    color: var(--text-main);
    text-decoration: none;
}

header h1 span {
    color: var(--accent);
}

header p {
    color: var(--text-muted);
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.section-title::before {
    content: '';
    display: inline-block;
    width: 4px;
    height: 1.5rem;
    background-color: var(--accent);
    border-radius: 2px;
}

.section-title.friends::before {
    background-color: var(--friend-accent);
}

.grid-main {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.grid-friends {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 4rem;
}

.card {
    background-color: var(--card-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card-main:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
    box-shadow: 0 10px 30px -10px var(--accent-glow);
}

.card h2 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    font-weight: 700;
}

.card p {
    color: var(--text-muted);
    font-size: 1rem;
    margin-bottom: 2rem;
    flex-grow: 1;
}

.card-friend {
    padding: 1.75rem;
    border-style: dashed;
}

.card-friend:hover {
    transform: translateY(-4px);
    border-style: solid;
    border-color: var(--friend-accent);
    box-shadow: 0 10px 25px -10px var(--friend-glow);
}

.card-friend h2 {
    font-size: 1.3rem;
    color: #e2e8f0;
}

.badge {
    display: inline-flex;
    align-items: center;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    margin-bottom: 1rem;
    width: fit-content;
}
.badge-core { background-color: rgba(56, 189, 248, 0.15); color: var(--accent); }
.badge-federated { background-color: rgba(16, 185, 129, 0.15); color: var(--friend-accent); }

.legal-content {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2.5rem;
    margin: 2rem 0;
}

.legal-content h2 {
    color: var(--accent);
    margin-top: 1.5rem;
    margin-bottom: 0.5rem;
    font-size: 1.5rem;
}

.legal-content p, .legal-content ul {
    margin-bottom: 1rem;
    color: var(--text-muted);
}

.legal-content ul {
    padding-left: 1.5rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--accent);
}

textarea.form-control {
    resize: vertical;
    min-height: 120px;
}

.btn {
    display: inline-block;
    text-align: center;
    color: #0f172a;
    text-decoration: none;
    font-weight: 700;
    padding: 0.85rem 1.25rem;
    border-radius: 10px;
    font-size: 0.95rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s ease;
    width: 100%;
}

.btn-main { background-color: var(--accent); }
.btn-main:hover { background-color: var(--accent-hover); }

.btn-friend { background-color: var(--friend-accent); }
.btn-friend:hover { background-color: #059669; }

.status-section {
    background-color: rgba(30, 41, 59, 0.3);
    border-radius: 16px;
    padding: 2.5rem;
    margin-bottom: 4rem;
    border: 1px solid var(--border-color);
}

.status-section h3 {
    font-size: 1.3rem;
    margin-bottom: 1.5rem;
    color: var(--accent);
}

.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    font-size: 0.95rem;
}

.status-item {
    background: rgba(15, 23, 42, 0.6);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.status-item strong {
    display: block;
    color: var(--text-main);
    margin-bottom: 0.25rem;
}

.status-item span {
    color: var(--success);
    font-weight: 600;
}

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    display: none;
    font-weight: 600;
}
.alert-success { background-color: rgba(34, 197, 94, 0.2); color: var(--success); border: 1px solid var(--success); }
.alert-error { background-color: rgba(239, 68, 68, 0.2); color: var(--error); border: 1px solid var(--error); }

footer {
    margin-top: auto;
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid rgba(30, 41, 59, 0.8);
    color: var(--text-muted);
    font-size: 0.9rem;
}

footer a {
    color: var(--accent);
    text-decoration: none;
    margin: 0 0.75rem;
}

footer a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    header h1 { font-size: 2.4rem; }
    .grid-main, .grid-friends { grid-template-columns: 1fr; }
    .legal-content { padding: 1.5rem; }
}