body {
    font-family: "Cairo", sans-serif;
    background: #fafafa;
    margin: 0;
    padding: 0;
    direction: rtl;
    display: flex;
}

/* Mobile toggle button */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 15px;
    right: 15px;
    z-index: 1001;
    background-color: #455A64;
    color: white;
    border: none;
    padding: 10px 15px;
    border-radius: 5px;
    font-size: 18px;
    cursor: pointer;
}

/* الشريط الجانبي */
.sidebar {
    width: 270px;
    background: #455A64;
    /* رمادي أزرق داكن */
    color: white;
    height: 100vh;
    overflow-y: auto;
    padding: 20px;
    position: fixed;
    right: 0;
    top: 0;
    box-sizing: border-box;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.sidebar h1 {
    font-size: 1.5em;
    margin: 0 0 25px 0;
    text-align: center;
    border-bottom: 2px solid #607D8B;
    padding-bottom: 12px;
    color: #ffffff;
    /* أبيض */
}

.sidebar ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.sidebar li {
    margin: 12px 0;
    cursor: pointer;
    font-size: 1.05em;
}

.sidebar li.sub {
    margin-right: 15px;
    font-size: 1em;
    color: #e0e0e0;
}

.sidebar li:hover {
    text-decoration: underline;
}

/* المحتوى الرئيسي */
.content {
    flex: 1;
    margin-right: 290px;
    padding: 20px;
}

h1,
h2,
h3 {
    color: #3f51b5;
}

h2 {
    margin-top: 30px;
    border-bottom: 2px solid #3f51b5;
    padding-bottom: 5px;
}

h3 {
    margin-top: 20px;
    color: #3949ab;
}

/* بطاقة المرجع */
.reference-card {
    background: #eeeded;
    /* رمادي فاتح */
    border-radius: 12px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    padding: 16px;
    margin-bottom: 15px;
    line-height: 1.6;
    color: #222;
    transition: background 0.3s;
    font-size: 18px;
}

.reference-card:hover {
    background: #d6d6d6;
    /* أغمق عند hover */
}

.reference-card p {
    margin: 0;
}

.reference-card.ltr {
    direction: ltr;
    text-align: left;
}

.buttons {
    margin-top: 10px;
}

.btn-copy {
    background: #dfe9ef;
    color: #3f51b5;
    border: none;
    padding: 6px 12px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 16px;
    margin: 4px;
}

.btn-copy:hover {
    background: #cfd8dc;
}

/* Mobile styles */
@media screen and (max-width: 768px) {
    .mobile-menu-toggle {
        display: block;
    }

    .sidebar {
        transform: translateX(100%);
        width: 250px;
        padding-top: 100px;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .content {
        margin-right: 0;
        padding: 60px 15px 20px 15px;
        width: 100%;
    }

    h2 {
        font-size: 1.3em;
        margin-top: 25px;
    }

    h3 {
        font-size: 1.1em;
        margin-top: 15px;
    }

    .reference-card {
        font-size: 16px;
        padding: 14px;
        margin-bottom: 12px;
    }

    .btn-copy {
        font-size: 14px;
        padding: 8px 10px;
        margin: 3px;
    }

    .sidebar h1 {
        font-size: 1.3em;
        margin-top: 10px;
    }

    .sidebar li {
        font-size: 1em;
        margin: 10px 0;
    }

    .sidebar li.sub {
        font-size: 0.95em;
        margin-right: 12px;
    }
}

/* Very small mobile screens */
@media screen and (max-width: 480px) {
    .sidebar {
        width: 230px;
    }

    .content {
        padding: 60px 10px 20px 10px;
    }

    h2 {
        font-size: 1.2em;
        margin-top: 20px;
    }

    h3 {
        font-size: 1em;
        margin-top: 12px;
    }

    .reference-card {
        font-size: 15px;
        padding: 12px;
        margin-bottom: 10px;
        line-height: 1.5;
    }

    .btn-copy {
        font-size: 13px;
        padding: 6px 8px;
        margin: 2px;
    }

    .sidebar h1 {
        font-size: 1.2em;
    }

    .sidebar li {
        font-size: 0.95em;
        margin: 8px 0;
    }

    .sidebar li.sub {
        font-size: 0.9em;
        margin-right: 10px;
    }
}

/* Mobile overlay */
@media screen and (max-width: 768px) {
    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 999;
    }

    .sidebar-overlay.show {
        display: block;
    }
}