:root { 
    --primary: #0f172a; 
    --bg: #f8fafc; 
    --card: #ffffff; 
    --border: #e2e8f0; 
    --text: #334155; 
}

body { 
    background: var(--bg); 
    color: var(--text); 
    font-family: 'Poppins', sans-serif; 
    margin: 0; 
    padding: 40px 20px; 
}

.wrapper { 
    max-width: 600px; 
    margin: 0 auto; 
}

.header { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
    margin-bottom: 30px; 
}

.back-btn { 
    text-decoration: none; 
    color: var(--primary); 
    font-weight: 700; 
    font-size: 14px; 
    padding: 8px 15px; 
    border-radius: 10px; 
    border: 1px solid var(--border); 
    background: white; 
    transition: 0.3s;
}

.back-btn:hover {
    background: var(--bg);
}

.card { 
    background: var(--card); 
    border-radius: 16px; 
    padding: 25px; 
    border: 1px solid var(--border); 
    margin-bottom: 20px; 
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02); 
}

h1 { 
    font-size: 20px; 
    font-weight: 800; 
    color: var(--primary); 
    margin: 0; 
}

h2 { 
    font-size: 12px; 
    font-weight: 700; 
    color: #64748b; 
    text-transform: uppercase; 
    margin-bottom: 20px; 
    letter-spacing: 0.5px; 
}

.form-group { 
    margin-bottom: 15px; 
}

label { 
    display: block; 
    font-size: 11px; 
    font-weight: 700; 
    margin-bottom: 5px; 
    color: #94a3b8; 
}

input { 
    width: 100%; 
    padding: 12px; 
    border-radius: 10px; 
    border: 1px solid var(--border); 
    font-size: 14px; 
    box-sizing: border-box; 
    outline: none;
    transition: 0.2s;
}

input:focus {
    border-color: var(--primary);
}

.save-btn { 
    background: var(--primary); 
    color: white; 
    border: none; 
    padding: 15px; 
    border-radius: 12px; 
    font-weight: 700; 
    cursor: pointer; 
    width: 100%; 
    transition: 0.3s;
}

.save-btn:hover {
    filter: brightness(1.2);
}

.toggle-box { 
    background: #f1f5f9; 
    padding: 15px; 
    border-radius: 12px; 
    display: flex; 
    justify-content: space-between; 
    align-items: center; 
}

/* --- MOBILE FIT PATCH --- */
* { box-sizing: border-box; }
html, body { max-width: 100%; overflow-x: hidden; }
img, svg, video { max-width: 100%; height: auto; }
input, select, textarea, button { max-width: 100%; min-width: 0; font-family: inherit; }
select { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
option, optgroup { white-space: normal; }

@media (max-width: 640px) {
    body { padding: 12px !important; align-items: flex-start !important; }
    .settings-container, .container, .card, form {
        width: 100% !important;
        max-width: 100% !important;
        margin: 0 !important;
    }
    .settings-container, .card {
        padding: 18px 14px !important;
        border-radius: 12px !important;
    }
    .form-row, .row { display: grid !important; grid-template-columns: 1fr 1fr !important; gap: 8px !important; }
    input, select, textarea { min-height: 46px; font-size: 16px !important; }
    button, .btn, a[class*="btn"] { min-height: 44px; white-space: normal; }
}

@media (max-width: 380px) {
    .form-row, .row { grid-template-columns: 1fr !important; }
}