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

:root {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --brand-primary: #5eb7b3;
    --border-color: rgba(47, 72, 142, 0.1);
    --header-h: 72px;
}
[data-theme="dark"] {
    --bg-primary: #0a1120;
    --bg-secondary: #10192e;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(94, 183, 179, 0.12);
}
body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    transition: background-color 0.3s, color 0.3s;
}
nav {
    height: var(--header-h);
    display: flex;
    align-items: center;
    background: color-mix(in srgb, var(--bg-primary) 75%, transparent);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}
.footer {
    text-align: center;
    padding: 32px 0;
    margin-top: 48px;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 13px;
}
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo img { height: 57px; cursor: pointer; display: block; }
.nav-actions { display: flex; gap: 12px; align-items: center; }

.btn-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1.5px solid #64748b;
    background: transparent;
    color: var(--text-primary);
    cursor: pointer;
    transition: all 0.2s;
    padding: 0;
}
.btn-icon:hover { border-color: var(--brand-primary); transform: translateY(-1px); }

/* Lang Menu */
.language-selector-container { position: relative; }
.language-menu {
    position: absolute;
    top: calc(100% + 12px);
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 8px;
    min-width: 160px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    display: none;
    z-index: 1000;
}
.language-menu.visible { display: block; }
.language-item {
    padding: 10px 16px;
    border-radius: 10px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: var(--text-primary);
    transition: all 0.2s;
}
.language-item:hover { background: var(--bg-primary); }
.language-item.active { background: rgba(94, 183, 179, 0.1); color: var(--brand-primary); font-weight: 600; }

.content {
    max-width: 800px;
    margin: 40px auto;
    background: var(--bg-secondary);
    padding: 40px 60px;
    border-radius: 20px;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
}
h1 { font-family: 'Outfit', sans-serif; font-size: 36px; margin-bottom: 32px; color: var(--text-primary); border-bottom: 3px solid var(--brand-primary); padding-bottom: 16px; letter-spacing: -0.5px; }
h2 { font-family: 'Outfit', sans-serif; font-size: 22px; margin-top: 40px; margin-bottom: 16px; color: var(--text-primary); letter-spacing: -0.3px; }
p { color: var(--text-secondary); margin-bottom: 18px; font-size: 16px; }
strong { color: var(--text-primary); font-weight: 600; }
@media (max-width: 600px) {
    .content { padding: 30px 20px; margin: 20px 10px; border-radius: 12px; }
    h1 { font-size: 28px; }
}