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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #0a0e1a;
    color: #e2e8f0;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(59, 130, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.container {
    max-width: 600px;
    width: 100%;
    text-align: center;
    position: relative;
    z-index: 1;
}

.logo-wrap {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 60px;
    padding: 12px 20px;
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(59, 130, 246, 0.2);
    border-radius: 12px;
    backdrop-filter: blur(10px);
}

.logo-wrap svg { width: 32px; height: 32px; }

.brand {
    text-align: left;
}

.brand-name {
    font-size: 18px;
    font-weight: 700;
    color: #fff;
    line-height: 1.2;
}

.brand-tag {
    font-size: 11px;
    color: #94a3b8;
    letter-spacing: 0.5px;
}

.error-code {
    font-size: 140px;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 16px;
    letter-spacing: -4px;
}

.error-title {
    font-size: 32px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
}

.error-message {
    font-size: 17px;
    color: #94a3b8;
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.btn {
    padding: 14px 28px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #6366f1 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(59, 130, 246, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(59, 130, 246, 0.5);
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.6);
    color: #e2e8f0;
    border: 1px solid rgba(148, 163, 184, 0.2);
}

.btn-secondary:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: rgba(148, 163, 184, 0.4);
}

.support {
    padding-top: 30px;
    border-top: 1px solid rgba(148, 163, 184, 0.1);
    color: #64748b;
    font-size: 13px;
}

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

.support a:hover { text-decoration: underline; }

@media (max-width: 600px) {
    .error-code { font-size: 100px; }
    .error-title { font-size: 24px; }
    .error-message { font-size: 15px; }
}