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

html {
    overflow-x: hidden;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    direction: rtl;
    background-color: #f5f5f5;
    padding: 20px;
    overflow-x: hidden;
    max-width: 100vw;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

h1 {
    color: #333;
    margin-bottom: 30px;
    font-size: 2rem;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #eee;
}

.header h1 {
    margin: 0;
}

nav {
    display: flex;
    gap: 15px;
}

.nav-link {
    padding: 10px 20px;
    text-decoration: none;
    color: #666;
    border-radius: 5px;
    transition: all 0.2s;
}

.nav-link:hover {
    background-color: #f0f0f0;
    color: #333;
}

.nav-link.active {
    background-color: #4a90e2;
    color: white;
}

.loading {
    text-align: center;
    padding: 40px;
    color: #666;
    font-size: 1.1rem;
}

.error {
    background-color: #fee;
    color: #c33;
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
    border: 1px solid #fcc;
}

.devices-container {
    display: grid;
    gap: 20px;
}

.device-card {
    background: white;
    border-radius: 8px;
    padding: 25px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.device-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.device-name {
    font-size: 1.3rem;
    font-weight: 600;
    color: #333;
}

.device-id {
    font-size: 0.9rem;
    color: #666;
    margin-top: 5px;
}

.sync-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-weight: 500;
    color: #333;
    font-size: 0.95rem;
}

.form-group select,
.form-group input[type="number"] {
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group select:focus,
.form-group input[type="number"]:focus {
    outline: none;
    border-color: #4a90e2;
    box-shadow: 0 0 0 2px rgba(74, 144, 226, 0.1);
}

.checkbox-group {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-direction: row-reverse;
}

.checkbox-group input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.checkbox-group label {
    cursor: pointer;
    user-select: none;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.2s;
    font-family: inherit;
}

.btn-primary {
    background-color: #4a90e2;
    color: white;
}

.btn-primary:hover:not(:disabled) {
    background-color: #357abd;
}

.btn-primary:disabled {
    background-color: #ccc;
    cursor: not-allowed;
}

.message {
    padding: 12px;
    border-radius: 5px;
    margin-top: 15px;
    font-size: 0.95rem;
}

.message-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: #666;
}

.empty-state p {
    font-size: 1.1rem;
}

/* Mobile Responsive Styles */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }

    h1 {
        font-size: 1.5rem;
        margin-bottom: 20px;
    }

    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding-bottom: 15px;
    }

    .header h1 {
        font-size: 1.3rem;
    }

    nav {
        flex-wrap: wrap;
        gap: 10px;
        width: 100%;
    }

    .nav-link {
        padding: 8px 15px;
        font-size: 0.9rem;
        flex: 1 1 auto;
        text-align: center;
    }

    .device-card {
        padding: 15px;
    }

    .device-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }

    .device-name {
        font-size: 1.1rem;
    }

    .btn {
        padding: 10px 20px;
        font-size: 0.9rem;
        width: 100%;
    }

    .form-group select,
    .form-group input[type="number"] {
        font-size: 16px; /* Prevents zoom on iOS */
    }

    .empty-state {
        padding: 40px 15px;
    }

    .empty-state p {
        font-size: 1rem;
    }
}

@media (max-width: 480px) {
    body {
        padding: 5px;
    }

    h1 {
        font-size: 1.2rem;
    }

    .header h1 {
        font-size: 1.1rem;
    }

    .nav-link {
        padding: 8px 12px;
        font-size: 0.85rem;
    }

    .device-card {
        padding: 12px;
    }

    .btn {
        padding: 10px 15px;
        font-size: 0.85rem;
    }
}